Generated by All in One SEO v4.9.5.1, this is an llms.txt file, used by LLMs to index the site. # Sacramento Valley Orchards Your source for orchard news & information in the Sacramento Valley ## Sitemaps - [XML Sitemap](https://www.sacvalleyorchards.com/sitemap.xml): Contains all public & indexable URLs for this website. ## Posts - [Blog](https://www.sacvalleyorchards.com/blog/) - [Managing flatheaded borer in Sacramento Valley walnut orchards](https://www.sacvalleyorchards.com/walnuts/managing-flatheaded-borer-in-sacramento-valley-walnut-orchards/) - Over the past few years, Sacramento Valley Orchard Advisors have received several calls about flatheaded borer damage concerns in walnut orchards. While most of those farm visits were found to be unrelated to flatheaded borer, it certainly underscored the need for awareness and accurate diagnosis of flatheaded borer and other problems. - [Mobile Irrigation Labs](https://www.sacvalleyorchards.com/irrigation-mgmt/mobile-irrigation-labs/) - Several local Resource Conservation District (RCD) county offices host Mobile Irrigation Labs that provide no-cost, on-site evaluations of irrigation systems. A typical evaluation will assess performance and efficiency across the entire system, including pumps, distribution lines, and emitters or nozzles. Detailed reports outlining observed pressures and application rates are provided post-visit, along with combined distribution - [Prune Newsletter](https://www.sacvalleyorchards.com/newsletter-archive/prune-newsletter-archive/) - 2026 Bloom - March 2026 2025 Fall/Winter - November 3, 2025 2025 Summer - 2025 June 26 2025 Spring, Part 2 - 2025 May 2025 Spring, Part 1 - 2025 April Preharvest 2024 Summer 2024 March 3rd 2009 May 2009 July 2009 October 2009 April 2010 October 2010 February 2010 Preharvest 2010 (August) October 2011 - [Current Southern Sacramento Valley ET Report - October 30](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/current-south-sac-valley/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Staten Island, and Verona CIMIS stations. - [Current Northern Sacramento Valley ET Report - October 23](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/current-north-sac-valley/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Honeybee Health: A 2025 Retrospective and 2026 Outlook](https://www.sacvalleyorchards.com/almonds/honeybee-health-a-2025-retrospective-and-2026-outlook/) - Becky Wheeler-Dykes, UCCE Glenn, Tehama and Colusa Counties The 2025 almond bloom began with reports of devastating honeybee colony loss, the likes of which the industry hasn’t seen in decades. In many cases, growers and/or beekeepers scrambled to find hives to pollinate almond orchards. Project Apis m., an organization focused on supporting honeybee health and - [Phytophthora sampling in the Stockton East Water District](https://www.sacvalleyorchards.com/almonds/phytophthora-sampling-in-the-stockton-east-water-district/) - Jaime Ott, UC Extension Tehama, Shasta, Glenn, and Butte Counties This work was partially funded by the Stockton East Water District Crown rot and root rot caused by Phytophthora species are diseases of great concern for almond growers. Many people believe that irrigating with surface water puts your trees at risk of Phytophthora, and that - [Preventing Bacterial Blast Damage in 2026](https://www.sacvalleyorchards.com/almonds/preventing-bacterial-blast-damage-in-2026/) - Jaime Ott, UCCE Tehama, Shasta, Glenn, and Butte Counties Though our weather outlook for the next couple of months is leaning toward warmer weather than usual, a cold snap during bloom and leaf-out could cause significant bacterial blast damage. Make a plan now in case of bad weather. The Bottom Line: Bacterial blast can be - [Research updates on almond Red Leaf Blotch](https://www.sacvalleyorchards.com/almonds/research-updates-on-almond-red-leaf-blotch/) - Renaud Travadon, Florent Trouillas, Alejandro Hernandez1 Department of Plant Pathology, University of California, Davis CA 95616 Kearney Agriculture Research & Extension Center, Parlier, CA 93648 Background In June 2024, a new foliar disease of almond, Red Leaf Blotch (RLB), was detected in Merced County. By the end of summer 2024, RLB presence was confirmed in six - [New UC Davis Prune Varieties Prove Promising 2025](https://www.sacvalleyorchards.com/prunes/new-uc-davis-prune-varieties-prove-promising-2025/) - Sarah Castro, Prune Cultivar Development Manager, Plant Sciences Department, UC Davis & Dr. Ted DeJong, Professor (retired), Plant Sciences Department, UC Davis The UC Davis Prune breeding program is currently promoting new, promising French-type selections whose harvest window spans 2 weeks before ‘Improved French’ to 2 weeks after ‘Improved French’. These French-types have a variety of - [Almond Newsletter](https://www.sacvalleyorchards.com/newsletter-archive/almond-newsletter-archive/) - Spring 2015 Summer 2015 Spring 2016 Fall 2016 Winter 2017 Fall 2017 Summer 2017 Spring 2017 October 2018 May 2018 Fall 2019 January 2019 Spring 2020 Fall/ Winter 2020 Fall 2021 Spring 2021 Spring 2022 Fall 2022 Pre Bloom 2023 Preharvest 2023 Winter 2024 Spring 2024 2025 Fall - Oct 6, 2025 2025 Summer - - [Advancing Prune Bloom: What we know so far](https://www.sacvalleyorchards.com/prunes/advancing-prune-bloom-what-we-know-so-far/) - Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Bad bloom weather – extreme heat, cold, or extended wet weather – can drastically reduce or eliminate commercial prune crops in the Sacramento Valley. Such bloom weather is a major economic stress to growers and costs California packers market share internationally, further impacting prune economics in - [2025 Season Retrospective](https://www.sacvalleyorchards.com/prunes/2025-season-retrospective/) - North Sac Valley: Jaime Ott, Orchard Advisor, UCCE Tehama, Shasta, Glenn, Butte Counties This year, full bloom in the northern Sacramento Valley was around March 23-25. Though we had average chilling this winter (72 chill portions by March 1st at the Gerber South CIMIS station), the weather heated up during bloom, with daily maximum temperatures - [Previous Northern Sacramento Valley ET Reports - October 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-october-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, - [Previous Southern Sacramento Valley ET Reports - October 2025](https://www.sacvalleyorchards.com/uncategorized/previous-southern-sacramento-valley-et-reports-october-2025/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, - [Current North Sac Valley Groundwater Report](https://www.sacvalleyorchards.com/irrigation-mgmt/groundwater-report-current/) - Quarterly groundwater report covering Colusa, Glenn, Butte, Tehama, and Shasta counties - [Water Newsletter](https://www.sacvalleyorchards.com/newsletter-archive/water-newsletter-archive/) - 2025 Summer - July 14, 2025 2025 Fall - Oct 14, 2025 - [Post-Harvest Ground Squirrel Management](https://www.sacvalleyorchards.com/photos-from-the-field/post-harvest-ground-squirrel-management/) - It can be difficult to control squirrel populations mid-season, when there are lots of nuts as a food source and when some squirrels may be estivating (hibernating due to summer heat), but now that those nuts are out of the picture, here are some post-harvest and dormant season management practices that may help knock squirrels back before next year. - [Pre-emergent herbicides: 2025 herbicide demonstration trial for walnut](https://www.sacvalleyorchards.com/uncategorized/pre-emergent-herbicides-2025-herbicide-demonstration-trial-for-walnut/) - The 2025 walnut pre-emergent herbicide demonstration trial is completed, and the results show strengths and weaknesses of 19 different herbicide treatments, applied either in February or March. - [Previous Northern Sacramento Valley ET Reports - September 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-september-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, - [Previous Southern Sacramento Valley ET Reports - September 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-southern-sacramento-valley-et-reports-september-2025/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, - [Ethephon use for managing walnut harvest and quality](https://www.sacvalleyorchards.com/walnuts/ethephon-use-for-managing-walnut-harvest-and-quality/) - Clarissa Reyes, Orchards Advisor, Sutter-Yuba, Butte and Placer Counties While it’s too early to predict how severe weather or pest flights might impact walnut harvest, we do know some basic walnut physiology that can inform our ability to adapt depending on what nature throws our way. Typically, walnut kernels reach maturity and have the highest - [Fall Zinc and Boron Review 2025](https://www.sacvalleyorchards.com/uncategorized/fall-zinc-and-boron-review-2025/) - Franz Niederholzer, UCCE Advisor, Colusa and Sutter/Yuba Counties Bloom is the most important time of year for adequate boron (B) and zinc (Zn) levels in almonds. Zinc is essential to many processes such as cell division, protein synthesis, and auxin synthesis in growing points (flowers and shoots), and bloom is the time of the most - [Red Leaf Blotch Finds its way to the Sacramento Valley (2025)](https://www.sacvalleyorchards.com/almonds/red-leaf-blotch-finds-its-way-to-the-sacramento-valley-2025/) - Florent Trouillas, Associate Professor of Cooperative Extension, Plant Pathology, UC Davis Luke Milliron, UCCE Farm Advisor, Butte, Glenn, and Tehama Counties Red leaf blotch (RLB), caused by the fungal pathogen Polystigma amygdalinum, which was first detected in California in the spring of 2024 has found its way to the Sacramento Valley. This summer the disease - [Oak Root Fungus: Rootstock Considerations in 2025-2026](https://www.sacvalleyorchards.com/uncategorized/oak-root-fungus-rootstock-considerations-in-2025-2026/) - Luke Milliron, UCCE Farm Advisor, Butte, Glenn and Tehama Counties Roger Duncan, UCCE Farm Advisor Emeritus, Stanislaus County If you have an orchard plagued generation after generation by oak root fungus (ORF, Armillaria mellea), disease resistance should be at or near the top of your list of rootstock attributes (PDF / comparison tool). Rootstock is - [Almond Management Considerations - Fall 2025](https://www.sacvalleyorchards.com/almonds/almond-management-considerations-fall-2025/) - Luke Milliron, UCCE Butte, Glenn, Tehama Counties Jaime Ott, UCCE Tehama, Shasta, Glenn, and Butte Counties Becky Wheeler-Dykes, UCCE Glen, Tehama, and Colusa Counties Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Postharvest nutrition Use information from your July leaf samples and harvest hull samples, along with 2025 yield, to plan potential fall Boron, - [Prune Tree Killers – Key Resources for Growers and PCAs](https://www.sacvalleyorchards.com/prunes/diseases-prunes/prune-tree-killers-key-resources-for-growers-and-pcas/) - Luke Milliron, UCCE Orchard Advisor Butte, Glenn, Tehama; Becky Wheeler-Dykes, UCCE Orchard Advisor Glenn, Tehama, Colusa; Jaime Ott, UCCE Orchard Advisor Tehama, Butte, Glenn, Shasta; Franz Niederholzer, UCCE Colusa, Sutter-Yuba Back on August 6 in Orland we had a UCCE advisor panel discussing six things that kill prune trees. If you missed that meeting or - [Previous Southern Sacramento Valley ET Reports - August 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-southern-sacramento-valley-et-reports-august-2025/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, - [Previous Northern Sacramento Valley ET Reports - August 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-august-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, - [Previous Northern Sacramento Valley ET Reports - July 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-june-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, - [Previous Southern Sacramento Valley ET Reports - July 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-southern-sacramento-valley-et-reports-june-2025/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, - [Kiwi Vine Canker Disease](https://www.sacvalleyorchards.com/kiwifruit/disease/kiwi-vine-canker-disease/) - Clarissa Reyes, Orchards Advisor, Sutter-Yuba, Butte, Placer counties Marcelo Bustamante, Postdoctoral Researcher, UC Davis Akif Eskalen, UCCE Specialist in Plant Pathology adapted from an article in Yuba-Sutter Farm Bureau Crop Talk Magazine, Vol. 19 No. 9 Kiwifruit is making a strong comeback in Yuba county – in just one year, its value jumped from - [Peach Newsletter](https://www.sacvalleyorchards.com/newsletter-archive/peach-newsletter/) - Spring 2025 - April 9, 2025 Spring 2024 - May 16, 2024 - [A July Nitrogen Leaf Result of 2.4% is the Goal](https://www.sacvalleyorchards.com/almonds/a-july-nitrogen-leaf-result-of-2-4-is-the-goal/) - Luke Milliron, UCCE Farm Advisor, Butte, Glenn and Tehama Counties Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Sebastian Saa Silva, Associate Director, Agricultural Research at Almond Board of California Almond orchard nitrogen (N) deficiency, measured as July leaf N%, is linked to reduced crop yield compared to orchards with adequate leaf N levels. - [Harvest: 2025 Considerations](https://www.sacvalleyorchards.com/almonds/harvest-2025-considerations/) - Luke Milliron, UCCE Farm Advisor, Butte, Glenn and Tehama Counties Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Clarissa Reyes, UCCE Farm Advisor, Sutter-Yuba, Butte, Placer Harvest: Timing is Everything The period from shaking until pick up is one of long days and high stakes in almond production. With the objective forecast for a - [Hull Split: 2025 Considerations](https://www.sacvalleyorchards.com/almonds/hull-split-2025-considerations/) - Luke Milliron, UCCE Farm Advisor, Butte, Glenn and Tehama Counties Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Hull Split: High Stakes The start of hull split is the most critical timing for navel orangeworm and hull rot control. How hull split proceeds is part of determining any water/energy savings, as well as your - [Calling CA farmers and Ag Consultants](https://www.sacvalleyorchards.com/blog/cfdn-soil-solicitation/) - We invite farmers and technical assistance providers to participate in an interview about CA soils. Participants can sign up at https://tinyurl.com/CFDNsoilsurvey and will receive a $50 gift card after completion of the interview. - [Integrated Pest Management Update - June 6, 2025](https://www.sacvalleyorchards.com/uncategorized/integrated-pest-management-update-july-6-2025/) - University of California Sacramento Valley Integrated Pest Management Update June 6, 2025 Disclaimer: Pests/natural enemies’ activities and abundance updates provided on this site are for reference purpose only. Information provided here do not replace or supersede your orchard site-specific pest activity and abundance data. For optimal pest management decision support and treatment efficacy, use data and observations - [Walnut Newsletter](https://www.sacvalleyorchards.com/newsletter-archive/walnut/) - 2026 Winter - February 20, 2026 2025 Fall - October 13, 2025 2025 Summer - July 9, 2025 2025 Spring - March 26, 2025 2025 Winter - January 27, 2025 2024 Fall - September 11, 2024 2024 Summer - July 1, 2024 2023 Winter 2023 Spring 2023 Summer 2023 Fall 2022 Spring 2022 Summer 2022 - [Maximizing Walnut Quality: Summer 2025](https://www.sacvalleyorchards.com/walnuts/maximizing-walnut-quality-summer-2025/) - Elizabeth Fichtner, UCCE Farm Advisor, Tulare County Carlos Crisosto, CE Specialist, Postharvest Physiology Bruce Lampinen, CE Specialist, Plant Sciences Luke Milliron, UCCE Farm Advisor Butte, Glenn, Tehama Counties An adaptation by Milliron of an article by Fichtner, Crisosto, and Lampinen (2019) The overall value of a walnut crop is based on yield and nut quality. - [Previous Southern Sacramento Valley ET Reports - May 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-southern-sacramento-valley-et-reports-may-2025/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona. More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 1, 2025 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, - [Managing webspinning spider mites in prunes](https://www.sacvalleyorchards.com/prunes/managing-webspinning-spider-mites-in-prunes/) - Sudan Gyawaly, Area IPM Advisor, UCCE Northern Sacramento Valley Spider mites are one of the pests that can become a problem in prunes. Two-spotted spider mite and Pacific spider mite are commonly found in prunes in the Central Valley. Of the two species, the two-spotted spider mite is the predominant species in the Sacramento Valley, - [Management of Johnsongrass in Orchards](https://www.sacvalleyorchards.com/prunes/management-of-johnsongrass-in-orchards/) - Ryan J Hill, UCCE Tehama, Shasta, Glenn Counties Summary: Rimsulfuron (Matrix, Hinge, Revolt, ect.) applications in early March, as johnsongrass shoots emerge from rhizomes, can be used to reduce johnsongrass coverage and vigor. Including glyphosate at this timing can provide a slight benefit, but since the available leaf surface area is so small, minimal herbicide - [Prune Orchard Pre- and Post-Harvest Irrigation Management (2025)](https://www.sacvalleyorchards.com/prunes/prune-orchard-pre-and-post-harvest-irrigation-management-2025/) - Luke Milliron, UCCE Orchards Advisor, Butte, Glenn, and Tehama Counties Curt Pierce, UCCE Irrigation and Water Resources Advisor, Glenn, Tehama, Colusa, and Shasta Counties Franz Niederholzer, UCCE Farm Advisor; Colusa and Sutter/Yuba Counties Summary: For the best returns and orchard health, ease up on irrigation before harvest, then resume full irrigation after harvest and continue - [Integrated Pest Management Update - July 10, 2025](https://www.sacvalleyorchards.com/pest-reports/integrated-pest-management-update-june-6-2025/) - University of California Sacramento Valley Integrated Pest Management Update July 10, 2025 Disclaimer: Pests/natural enemies’ activities and abundance updates provided on this site are for reference purpose only. Information provided here do not replace or supersede your orchard site-specific pest activity and abundance data. For optimal pest management decision support and treatment efficacy, use data and observations - [Integrated Pest Management Update - April 29, 2025](https://www.sacvalleyorchards.com/pest-reports/integrated-pest-management-update-april-29-2025/) - University of California Sacramento Valley Integrated Pest Management Update April 29, 2025 Disclaimer: Pests/natural enemies’ activities and abundance updates provided on this site are for reference purpose only. Information provided here do not replace or supersede your orchard site-specific pest activity and abundance data. For optimal pest management decision support and treatment efficacy, use data and observations - [Previous Northern Sacramento Valley ET Reports - May 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-may-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Winter Chill & Dormancy Management – 2025 Update](https://www.sacvalleyorchards.com/walnuts/winter-chill-dormancy-management-2024-update/) - Kat Jarvis-Shean, Orchard Systems Advisor UCCE Sacramento-Solano-Yolo Depending on where you grow and how you count, this is shaping up to be a low-to-moderate chill winter. As discussed previously in 2023 and 2024, walnuts are one of the highest chill requirement tree crops in California. Multiple recent winters have fallen short of the chill needed - [Some factors to consider when evaluating a new crop enterprise for your farm](https://www.sacvalleyorchards.com/prunes/some-factors-to-consider-when-evaluating-a-new-crop-enterprise-for-your-farm/) - Domena A. Agyeman, UCANR Economic Advisor; Butte, Glenn, and Tehama Counties One of the common requests I have received from crop producers and other agricultural stakeholders in the Sacramento Valley is for insights into alternative crop options that are drought- and disease-resistant and have the potential to command higher prices. With high production costs squeezing - [GDH30 for 2025: where we stand and what it means](https://www.sacvalleyorchards.com/prunes/gdh30-for-2025-where-we-stand-and-what-it-means/) - Jaime Ott, UCCE Tehama, Shasta, Glenn, and Butte Counties The growing degree hours in the 30 days after full bloom (GDH30) is a measurement which predicts reference date, harvest date, and fruit sizing potential. It is counterintuitive, but higher GDH30 (warmer weather after bloom) results in earlier reference date, earlier harvest date, and smaller maximum - [Prune Fruit Bloom Report, 2025](https://www.sacvalleyorchards.com/prunes/prune-fruit-bloom-report-2025/) - Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties In 2025, prune bloom was late with a very hot spike in temperature around full bloom. This led to concern for a very light fruit set across all orchards (crop failure). Fortunately, five weeks after full bloom, the fruit set looks to be generally good across - [Technology Spotlight: Cropload Estimation in Prunes](https://www.sacvalleyorchards.com/prunes/technology-spotlight-cropload-estimation-in-prunes/) - Becky Wheeler, Farm Advisor, UCCE Glenn, Colusa and Tehama Counties Recent advances in imaging technologies combined with highly accurate GPS tracking can provide growers with detailed and precise information about their orchards. While there are no current UC replicated studies on the use of the technology in prunes, several growers report using it to help - [Previous Northern Sacramento Valley ET Reports - April 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-april-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Previous Southern Sacramento Valley ET Reports - April 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-southern-sacramento-valley-et-reports-nov-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for Sep 6 - Oct 3, 2024. - [Almond Variety Trials: Bloom Observations (2025)](https://www.sacvalleyorchards.com/almonds/almond-variety-trials-bloom-observations-2025/) - Luke Milliron, UCCE Orchards Advisor, Butte, Glenn, Tehama Counties 2025 Observations at Bloom: My former colleague Dani Lightle wisely noted that what stands out in the early years of a variety trial is not what looks good – it’s what looks bad. For the new UC almond variety trial planted spring 2023, testing nearly 30 - [Managing true bug (leaffooted plant bug and stink bug) pests in almond orchards](https://www.sacvalleyorchards.com/almonds/managing-true-bug-leaffooted-plant-bug-and-stink-bug-pests-in-almond-orchards/) - Sudan Gyawaly, UCCE IPM Advisor, Butte, Colusa, Sutter-Yuba, Glenn, and Tehama Counties Jhalendra Rijal, UCCE IPM Advisor, Stanislaus, Merced and San Joaquin Counties Brown spots caused by feeding damage from true bugs can be graded as a defect and so are an increasing concern for almond growers. These pests include various species of stink bugs - [Previous Northern Sacramento Valley ET Reports - March 2025](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/previous-northern-sacramento-valley-et-reports-march-2025/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Native hedgerows as a weed management tool in orchards](https://www.sacvalleyorchards.com/walnuts/native-hedgerows-as-a-weed-management-tool-in-orchards/) - Justin Valliere, Assistant Professor of Cooperative Extension, Invasive Weed & Restoration Ecology, UC Davis Rachael Long, Emeritus Farm Advisor for Field Crops, Pest Management Field edges are a common source of weed intrusion into farms, often requiring intensive management. Establishing hedgerows of native California perennial plant species offers a proactive approach for reducing weed invasion - [Roller Crimping – A Cover Crop Termination Option](https://www.sacvalleyorchards.com/blog/almonds-blog/roller-crimping-a-cover-crop-termination-option/) - Annie Edwards and Margaret Smither-Kopperl with the USDA recently released a report on termination using a roller crimper in orchard systems. - [Carbohydrates, dormancy, and yield in pistachios](https://www.sacvalleyorchards.com/pistachio/horticulture-pistachio/carbohydrates-dormancy-and-yield-in-pistachios/) - Recent years of research by the Zwieniecki lab (the Z Lab) at UC Davis, including the Carbohydrate Observatory, have been providing exciting new insights to better explain how pistachios may be counting winter chill, when budbreak occurs, and how much pistachios will yield in a given year. - [The case for orchard sanitation](https://www.sacvalleyorchards.com/uncategorized/the-case-for-orchard-sanitation/) - Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Sudan Gyawaly, UC IPM Advisor, Sacramento Valley Is winter sanitation really necessary? This question was asked at a recent grower meeting. Our answer is YES, now, more than ever in the last 20 years. This is why… Multiple research studies confirm more mummies per tree in - [Cytospora Prevention in Late Winter & Early Spring](https://www.sacvalleyorchards.com/uncategorized/cytospora-prevention-in-late-winter-early-spring/) - Jaime Ott, UCCE Tehama, Glenn, Shasta, Butte Luke Milliron, UCCE Butte, Glenn, Tehama Infection by Cytospora and other fungi is a major cause of scaffold and tree loss in prunes, resulting in reduced yield. These fungi can also infect young trees, significantly reducing the return on investment of an orchard. We have written extensively about - [Gophers, Ground Squirrels, and Voles… Oh My!](https://www.sacvalleyorchards.com/prunes/gophers-ground-squirrels-and-voles-oh-my/) - Becky Wheeler-Dykes, Orchard Systems and Weed Ecology Farm Advisor, UCCE Glenn, Tehama and Colusa Counties Luke Milliron, Orchards Advisor, UCCE Butte Glenn, Tehama Counties In February 2025, Dr. Roger Baldwin gave an excellent presentation on vertebrate pest management at the North Sac Valley Prune Day. Dr. Baldwin discussed aspects of the basic biology, life - [Stem Water Potential (SWP) baseline tables](https://www.sacvalleyorchards.com/manuals/stem-water-potential/stem-water-potential-swp-baseline-tables/) - Link to PDF files here - [Walnut Mold and How to Manage It](https://www.sacvalleyorchards.com/walnuts/walnut-mold-and-how-to-manage-it/) - Themis J. Michailides & Victor Manuel Gabri, University of California, Davis / Kearney Ag Research and Extension Center In the last several years, walnut growers in California experienced unusually high levels of mold in their crop. Particularly in 2018, growers in Glenn and Butte counties reported 30-40% mold. Levels of 1-3% mold are considered something - [Almond Variety Evaluation (2025)](https://www.sacvalleyorchards.com/almonds/almond-variety-evaluation-2025/) - Luke Milliron, UCCE Orchards Butte, Glenn, Tehama Phoebe Gordon, UCCE Madera and Merced Roger Duncan UCCE Stanislaus, Emeritus What varieties do we know the most about? New almond varieties are always coming out from public and private breeding programs around the world. It’s tempting to plant the latest and greatest. Unfortunately, many growers in our - [Previous Southern Sacramento Valley ET Reports - October 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-october-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for Sep 6 - Oct 3, 2024. - [Previous Northern Sacramento Valley ET Reports - November 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-november-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Assessing the Needs of Agricultural Producers in Butte, Glenn, and Tehama Counties](https://www.sacvalleyorchards.com/prunes/assessing-the-needs-of-agricultural-producers-in-butte-glenn-and-tehama-counties/) - Domena A. Agyeman, UCCE Agriculture and Natural Resources Economics Advisor; Butte, Glenn, and Tehama Counties Introduction This report summarizes the primary challenges reported by agricultural producers from Butte, Glenn, and Tehama counties who participated in an economics needs assessment survey. Respondents were asked to indicate the top three challenges impacting the future success of their - [Rootstock options for your next prune orchard (2024)](https://www.sacvalleyorchards.com/prunes/rootstock-options-for-your-next-prune-orchard-2024/) - Luke Milliron, UCCE Orchard Advisor Butte, Glenn, Tehama Franz Niederholzer, UCCE Orchard Advisor Colusa, Sutter-Yuba Jaime Ott, UCCE Orchards Advisor Tehama, Butte, Glenn, Shasta The Skinny: Your rootstock choice should guard against your greatest fear for your new orchard, whether it be blow over, production potential, nematodes, or a disease. The historical choice of a - [2025 Almond Fungicide Efficacy and Timing Tables](https://www.sacvalleyorchards.com/almonds/almond-fungicide-efficacy-and-timing-tables/) - Click Here for the Almond Fungicide Efficacy and Timing Tables Link - [2025 Prune Fungicide Efficacy Tables](https://www.sacvalleyorchards.com/prunes/prune-fungicide-efficacy-tables/) - CLICK HERE FOR A LINK TO THE PRUNE FUNGICIDE EFFICACY TABLES (right click -> "Open link in new tab") - [Adapting to Season-Long High Temperatures: Understanding Peach Fruit Growth and Development](https://www.sacvalleyorchards.com/blog/adapting-to-season-long-high-temperatures-understanding-peach-fruit-growth-and-development/) - Raymond Mireles, UCCE Fruit and Almond Advisor Tulare and Fresno Counties Many growers in the Central Valley were challenged with consecutive days of high temperatures in 2024, making it difficult to meet orchard demands throughout the season. The early warm spring temperatures initially promoted good fruit set, but then negatively impacted fruit size and quality - [Nubbins and Doubles on Peaches: Potential Causes](https://www.sacvalleyorchards.com/blog/nubbins-and-doubles-on-peaches-potential-causes/) - Cameron Zuber, Orchard Crops Farm Advisor, Merced and Madera Counties Roger Duncan, Pomology Advisor, Stanislaus County Maxwell Norton, Farm Advisor Emeritus Originally posted September 2022 here Occasionally smaller sized fruits are seen on the same variety of peaches midway through the growing season. When a single small fruit is at the peduncle, it is called - [Walnut Blight Management](https://www.sacvalleyorchards.com/walnuts/walnut-blight-management-2/) - Jaime Ott, UCCE Farm Advisor, Tehama, Shasta, Glenn, and Butte Counties According to Dr. Jim Adaskaveg, UC Riverside professor who has been studying walnut blight for decades, these are the most common mistakes growers make in their blight control program: Walnut blight is caused by the bacterium Xanthomonas arboricola pv. juglandis (Xaj) and is one - [From the Butte County Farm Bureau Ag. Finance Workshop:  Some Financial Metrics You Should Know](https://www.sacvalleyorchards.com/walnuts/from-the-butte-county-farm-bureau-ag-finance-workshop-some-financial-metrics-you-should-know/) - Domena A. Agyeman, UCCE Economic Advisor; Butte, Glenn, and Tehama Counties Managing farm finances can be challenging—especially for small growers who cannot afford to hire experts. However, understanding key financial statements and metrics is crucial for making informed decisions and ensuring long-term business sustainability. Many growers who completed my economics needs survey reported familiarity with - [Almond Orchard Management Considerations: February & March 2025](https://www.sacvalleyorchards.com/almonds/almond-orchard-management-considerations-february-march/) - Almond Orchard Management Considerations: February & March Becky Wheeler-Dykes, UCCE Farm Advisor, Glenn, Tehama, and Colusa Counties Luke Milliron, UCCE Farm Advisor, Butte, Glenn, and Tehama Counties Weed management: Prepare your preemergent herbicide program with your PCA. Cost savings in mature orchards can be minimized by narrowing the weed-free strip and relying more heavily on - [2025 Peach Harvest Timing](https://www.sacvalleyorchards.com/blog/2025-peach-harvest-timing/) - Clarissa Reyes, Orchard Advisor, Sutter-Yuba, Butte, and Placer Counties Peach harvest can be predicted fairly accurately by the temperatures in the first 30 days following bloom. Other factors such as weather near harvest, soil, tree nutrition, and water status can also have some effect on harvest date. On average, we accumulate about 6,000 growing degree - [Irrigating Walnut Trees in 2025 – Continuing Research on When to Start](https://www.sacvalleyorchards.com/walnuts/irrigating-walnut-trees-in-2025-continuing-research-on-when-to-start/) - Curt Pierce, UCCE Irrigation and Water Resource Advisor Luke Milliron, UCCE Orchard Systems Advisor With the days only just warming and (at the time of this writing) significant rain still falling in the North Sacramento Valley, few are likely to be in any rush to start pumping. Spring heat can come on fast, however, quickly - [Why it’s important to thin peaches early](https://www.sacvalleyorchards.com/blog/why-its-important-to-thin-peaches-early/) - Clarissa Reyes, Orchards Advisor, Sutter-Yuba, Butte, and Placer Counties At the end of the day, cling peach growers want high fruit yields with large size. Yield and growth are influenced by two separate, but interdependent processes: assimilation processes that supply carbohydrates and nutrients, and developmental processes that create a demand for these resources. The interaction - [Integrated Pest Management Update - April 7, 2025](https://www.sacvalleyorchards.com/pest-reports/integrated-pest-management-update-april-7-2025/) - University of California Sacramento Valley Integrated Pest Management Update April 7, 2025 Disclaimer: Pests/natural enemies’ activities and abundance updates provided on this site are for reference purpose only. Information provided here do not replace or supersede your orchard site-specific pest activity and abundance data. For optimal pest management decision support and treatment efficacy, use data and observations - [Integrated Pest Management Update - July 17, 2024](https://www.sacvalleyorchards.com/pest-reports/2024-pest-reports/integrated-pest-management-update-july-22-2024/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [2025 Herbicide Registration on California Tree and Vine Crops](https://www.sacvalleyorchards.com/walnuts/herbicide-registration-on-california-tree-and-vine-crops/) - Reviewed January 2025 - UC Weed Science Click Here for Herbicide Table on CA Tree and Vine Crops - [Optimizing preemergent herbicide applications](https://www.sacvalleyorchards.com/almonds/optimizing-preemergent-herbicide-applications/) - Ryan J Hill, UCCE Tehama County, Agronomy and Weed Science Advisor Preemergent herbicides are a valuable tool in an orchard’s integrated weed management plan. If you survey a room full of growers, you will get answers across the board as to when it is best to apply preemergent herbicides in almonds. Do you apply after - [Walnut Winter Management UCCE Resources 2025](https://www.sacvalleyorchards.com/walnuts/walnut-winter-management-ucce-resources-2025/) - Jaime Ott, UCCE Tehama, Shasta, Glenn, and Butte Counties With walnut prices modestly up, this is a good time to look at your orchard operation, grade sheets, and pest/disease challenges in the last few years and make a plan for 2025 and beyond. Consider how the 5% rule might apply, where small improvements across multiple - [2024 Prune Season Retrospective](https://www.sacvalleyorchards.com/prunes/2024-prune-season-retrospective/) - North Sac Valley: Jaime Ott, UCCE Tehama, Shasta, Glenn, Butte Counties Despite a much earlier bloom than last year, harvest started only a few days earlier. Fruit size and sugar at harvest was variable: blocks with heavy cropload or which suffered from water stress during the season struggled with size and sugar. Tonnage was down - [Previous Northern Sacramento Valley ET Reports - September 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-september-2024-3/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for Sept 6 - Oct 3, 2024. - [Previous Northern Sacramento Valley ET Reports - October 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-september-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Previous Southern Sacramento Valley ET Reports - September 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-september-2024-2/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for Sep 6 - Oct 3, 2024. - [Autumn freeze damage strikes again (2024)](https://www.sacvalleyorchards.com/blog/walnuts-blog/autumn-freeze-damage-strikes-again-2024/) - Autumn freeze damage in walnuts can occur when trees experience freezing temperatures prior to going into dormancy. Since 2018, we've learned management practices that can prevent widespread damage. - [New Threat to California Almonds: Red Leaf Blotch](https://www.sacvalleyorchards.com/almonds/foliar-diseases/new-threat-to-california-almonds-red-leaf-blotch/) - In late May 2024, unusual symptoms on leaves, including yellow spots and orange to dark red-brown blotches, were detected in an almond orchard (Nonpareil, Monterey and Fritz) on the border of Merced and Madera counties. - [Vegetation for Infiltration](https://www.sacvalleyorchards.com/blog/almonds-blog/vegetation-for-infiltration/) - Facing a fourth consecutive year of drought conditions across California, and pressures to preserve existing water reserves has led to more California growers taking interest in incorporating some form of agriculturally managed recharge (AG-MAR) into their water management plans. Read further to learn how cover crops can help divert runoff from winter storms into groundwater basins for future use. - [Previous Southern Sacramento Valley ET Reports - August 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-september-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 28 - Aug 1, 2024. - [Previous Northern Sacramento Valley ET Reports - August 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-august-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Playing Potassium Catch-Up?](https://www.sacvalleyorchards.com/almonds/horticulture/playing-potassium-catch-up/) - Fertilizer management with thin margins is extra tricky with almonds because varieties can yield so differently within a year. Post-harvest can be a great time to start catching up on potassium. - [Small steps boost net grower returns](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/small-steps-boost-net-grower-returns/) - Almond growers are in a long tunnel of low prices and high costs. With volatile nut prices largely out of grower control, cost management and cost-effective yield improvements offer the best hope of maintaining headway and reaching the light. - [Carpophilus beetle ID guide](https://www.sacvalleyorchards.com/almonds/insects-mites/carpophilus-beetle-id-guide/) - UC IPM has released a new resource to help identify carpophilus beetle - [Ethephon for Earlier Harvest](https://www.sacvalleyorchards.com/walnuts/ethephon-for-earlier-harvest/) - Ethephon, also known as Ethrel®, is an ethylene-based plant growth regulator applied at walnut maturity, or shortly thereafter, which accelerates hull cracking and separation from the shell. This advances walnut harvest by four to seven days, depending on the season and variety, and nut value is increased by lighter kernel color and possibly less insect damage. - [Oilless Walnuts](https://www.sacvalleyorchards.com/photos-from-the-field/oilless-walnuts/) - Early splitting husks in walnuts are oilless nuts. They can be recognized by the early husk split and dark pellicle with white nut meat. Click Read More (below) to see more images of oilless nuts compared to normal walnuts. - [Prune Brownline Alert](https://www.sacvalleyorchards.com/prunes/diseases-prunes/prune-brownline-alert/) - Jaime Ott, UCCE Tehama, Shasta, Glenn, and Butte Counties Since this spring (2023), we have found prune brownline disease (brownline) in three Sac Valley orchards on Krymsk 86 rootstock. Symptoms include tree decline and rapid collapse of the entire canopy. If you peel the bark away, a distinct line of brown, dead tissue will be - [The Big Three in Prunes](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/the-big-three-in-prunes/) - The three most important management decisions dictating fruit size and crop size (and therefore grower returns) are 1) cropload management, 2) irrigation, and 3) nutrient management (especially potassium). - [Previous Northern Sacramento Valley ET Reports - July 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-july-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for June 28 - Aug 1, 2024. - [Previous Southern Sacramento Valley ET Reports - July 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-july-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 28 - Aug 1, 2024. - [Options for Gopher Management](https://www.sacvalleyorchards.com/blog/almonds-blog/options-for-gopher-management/) - A bad gopher infestation can reach populations as high as 30-40 per acre. Feeding on the bark around the crown girdles the tree, leading to tree collapse or death. Here are the methods that do and don't work for gopher control in orchards. - [Integrated Pest Management Update - May 3, 2024](https://www.sacvalleyorchards.com/pest-reports/2024-pest-reports/integrated-pest-management-update-may-3-2024/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Integrated Pest Management Update - June 11, 2024](https://www.sacvalleyorchards.com/pest-reports/integrated-pest-management-update-june-11-2024/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Panel Discussion: Perspectives on Walnut Economics - a recap](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/panel-discussion-perspectives-on-walnut-economics-a-recap/) - Clarissa Reyes, Orchard Systems Advisor, Sutter-Yuba, Butte & Placer Countie Jaime Ott, UCCE Tehama, Shasta, Glenn & Butte Counties Becky Wheeler-Dykes, UCCE Glenn, Colusa & Tehama Counties In February 2024, the Sutter-Yuba and Tehama Walnut Day meetings featured panel discussions focused on the current economy of the walnut industry. We hoped these panels would address - [Find Small Improvements: The 5% Rule](https://www.sacvalleyorchards.com/prunes/economics-prunes/find-small-improvements-the-5-rule/) - Rising production costs continue to squeeze profit margins for prune growers. The five percent rule can be an effective principle for improving profits, advocating for small improvements across multiple aspects of an operation rather than striving for large gains in one or two areas. - [Carpophilus Beetle: What We Know](https://www.sacvalleyorchards.com/almonds/insects-mites/carpophilus-beetle-what-we-know/) - Carpophilus beetle (Carpophilus truncatus) is a small insect that causes severe damage to almond kernels. Humid conditions increase the emergence and rate of development, leading to multiple generations within a season. - [Managing aphids in prune orchards](https://www.sacvalleyorchards.com/prunes/insects-mites-prunes/managing-aphids-in-prune-orchards/) - ‘Leaf curl plum aphid’ and ‘mealy plum aphid’ are the key pests of prune orchards in the northern Sacramento Valley. - [Replanting Prunes Back into Prunes](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/replanting-prunes-back-into-prunes/) - Becky Wheeler-Dykes, UCCE Farm Advisor Glenn, Tehama and Colusa Counties Luke Milliron, UCCE Farm Advisor Butte, Glenn, and Tehama Counties With the recent good prices, many growers with prune orchards at the end of their productive lifespan are opting to replant back into prunes. With ever increasing input costs, yield maximization is one of - [2024 Navel Orangeworm Updates](https://www.sacvalleyorchards.com/almonds/insects-mites/2024-navel-orangeworm-updates/) - Navel orangeworm is impossible to control completely, it must be carefully managed to reduce damage and improve grower income. Growers and PCAs are fighting back to manage NOW this year. - [Planning for a big crop in tight times](https://www.sacvalleyorchards.com/almonds/horticulture/planning-for-a-big-crop-in-tight-times/) - Maintaining income in a low-price year will require growing a large, high-quality crop. - [NOW Reality Check](https://www.sacvalleyorchards.com/almonds/insects-mites/now-reality-check/) - Times change. Weather changes. Manage navel orangeworm accordingly. - [Pest management for Shothole and Scab](https://www.sacvalleyorchards.com/almonds/foliar-diseases/pest-management-for-shothole-and-scab/) - Joe Connell addresses symptoms, management and treatment of fungal diseases shothole and scab - [Be Careful with Almond Variety-Rootstock Selection](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/be-careful-with-almond-variety-rootstock-selection/) - Almond variety and rootstock selection is a quarter century investment. Evaluating the compatibility of different varieties and rootstocks together is critical to deciding whether a combination will be successful. - [Phellinus wood rot, or “Why do my trees blow up at harvest?”](https://www.sacvalleyorchards.com/prunes/diseases-prunes/phellinus-wood-rot-or-why-do-my-trees-blow-up-at-harvest/) - California's prune industry faces a significant challenge: a decline in orchard lifespan. A primary disease culprit associated with premature orchard decline is the loss of fruit-producing scaffolds likely caused by the heart rot fungus Phellinus pomaceus (formerly called P. tuberculosus). - [What are you doing for your orchard’s financial longevity?](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/what-are-you-doing-for-your-orchards-financial-longevity/) - Your orchard is an investment – the longer it remains a productive, high-yielding orchard the higher your return on that investment - [Making money at harvest](https://www.sacvalleyorchards.com/prunes/economics-prunes/making-money-at-harvest/) - Sustainable net return to grower is the measure of success in farming. Because profit margins shrink with increasing costs, small income increases (that don’t impact overall orchard health) can have major benefits to an operation’s bottom line. - [Tomato Following Walnut: Considerations and Tips](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/tomato-following-walnut-considerations-and-tips/) - There are some concerns about growing tomatoes on old walnut ground, but very little formal research exists in this area. - [Disease management decisions in low-income year(s)](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/disease-management-decisions-in-low-income-years/) - Several steps must all be done correctly for fungicide sprays to be most effective. Missing one step can severely limit the outcome (and cost the grower a lot of money). - [April Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/april-3/) - Read this article for walnut orchard management tasks to keep in mind in April. - [Pest Reports Available on Sacramento Valley Orchard Source Website](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/pest-reports-available-on-sacramento-valley-orchard-source-website/) - The SacValleyOrchards team has started posting pest monitoring reports/updates for major walnut and almond pests for our region - [IPM on a Budget: Cost Saving Strategies for Insect & Mite Management (updated June 2024)](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/ipm-on-a-budget-cost-saving-strategies-for-insect-mite-management-updated-june-2024/) - Originally written by Emily J. Symmes, Former Sacramento Valley Area IPM Advisor Revised in June 2024 by Sudan Gyawaly, Sacramento Valley Area IPM Advisor The good news is that a truly sound IPM program should already have you considering economic costs and returns when making pest management decisions. Economic treatment thresholds for pest management can - [Timing almond harvest in 2024](https://www.sacvalleyorchards.com/blog/almonds-blog/timing-almond-harvest-in-2024/) - Historically, the recommendation from UC almond experts for the ideal time to shake was as soon as 100% hull split occurred throughout the orchard, however, these considerations vary widely among varieties and locations. Potential challenges that growers should consider when timing harvest include pest and disease management, nut removal/drying time, and nut quality. - [First Hull Split Spray: Timing and Practice](https://www.sacvalleyorchards.com/almonds/horticulture/first-hull-split-spray-timing-and-practice/) - Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Sudan Gyawaly, UC IPM Advisor, Sacramento Valley David Haviland, UCCE Entomology Advisor, Kern County Hull split for the 2024 almond crop is just ahead. Successful hull split spraying lowers NOW damage but requires accurate spray timing and careful spray practices. Good coverage, applied on time will - [Monterey Maladies and the Need for Careful Irrigation Management](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/monterey-maladies-and-the-need-for-careful-irrigation-management/) - Over the past eight years, Sacramento Valley growers have encountered challenges managing Monterey almond trees: yellowed curled leaf, leafing failure, flowering failure, and Bot/Phomopsis dieback. - [New UC Davis Prune Varieties Prove Promising](https://www.sacvalleyorchards.com/blog/prunes-blog/new-varieties-prove-promising/) - The UC Davis Prune breeding program is eager to patent a new variety, Yolo Gold, as well as promote new promising French-type cultivars. - [Previous Southern Sacramento Valley ET Reports - June 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-june-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for May 31- June 27, 2024. - [Previous Northern Sacramento Valley ET Reports - June 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-june-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for May 31 - June 27, 2024. - [Previous Southern Sacramento Valley ET Reports- May 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-may-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for May 3 - May 30, 2024. - [Previous Southern Sacramento Valley ET Reports- April 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-april-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 5 - May 2, 2024. - [Previous Northern Sacramento Valley ET Reports- April 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-april-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for April 5 - May 2, 2024. - [Previous Northern Sacramento Valley ET Reports- May 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-may-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for May 3 - May 30, 2024. - [Previous Northern Sacramento Valley ET Reports- March 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-northern-sacramento-valley-et-reports-march-2024/) - This report covers the CIMIS stations in Gerber, Biggs, Durham, and Williams for Mar 08 - April 04, 2024. - [Drought Strategies for Walnut Orchards](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/drought-strategies/) - With 41 California counties officially in a drought emergency and water allocations significantly reduced in many areas, many growers and managers are stuck with less water than walnuts use for prime production levels. Read this article for more information about how to manage walnut irrigation in drought years. - [Previous Southern Sacramento Valley ET Reports- March 2024](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/previous-southern-sacramento-valley-et-reports-march-2024/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for Mar 08 - April 04, 2024. - [Winter Chill, Dormancy and Walnut Management – 2023-2024 Update](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/winter-chill-dormancy-and-walnut-management-2023-2024-update/) - For three winters, we have been studying the impact of a number of dormancy breaking treatments to give growers tools to deal with low chill winters. This previous winter-spring, we put Dormex at 2% and 4% head-to-head. - [Potassium Management Options in Prunes](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/potassium-management-options/) - A prune grower’s potassium (K) program can be one of the most critical components of an orchard management plan. Read for more considerations when making a potassium plan. - [2024 Emergency Use (Section 18) of Kasumin® 2L Approved for Prevention of Almond Bacterial Blast](https://www.sacvalleyorchards.com/almonds/foliar-diseases/2024-emergency-use-of-kasumin/) - Pseudomonas syringae pv. syringae is ubiquitous in orchards, so bacterial blast can develop whenever environmental conditions are right (freezing or near-freezing and wet). While copper sprays have been used to protect trees from bacterial blast, resistance is common in P. syringae populations throughout the state. Unfortunately, it is no longer effective for controlling bacterial blast in some orchards, however, Kasumin® 2L has been shown to be effective. - [Efficacy of a Hull Split Spray vs. Sanitation for NOW Control](https://www.sacvalleyorchards.com/almonds/insects-mites/efficacy-of-a-hull-split-spray-vs-sanitation-for-now-control/) - When more NOW larvae make it through the winter, more egg laying will occur next season regardless of what else you do. If you have scarce dollars to spend on NOW control, spend them this winter when they will do the most good in a sanitation program. - [Preventing Bacterial Blast Damage in 2024](https://www.sacvalleyorchards.com/almonds/foliar-diseases/preventing-bacterial-blast-damage-in-2024/) - In 2023, the cold, wet weather during bloom and leaf-out resulted in bacterial blast damage in many Sacramento Valley almond orchards. If conditions this year are cold and wet during bloom, we may see a recurrence of blast: make a plan now to keep blast damage to a minimum. - [Wet winter concerns: Phytophthora and waterlogging](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/wet-winter-concerns-phytophthora-and-waterlogging/) - Excessive water, caused by rain, flooding, or even overirrigation, is a challenge for orchards and can cause two very different problems: waterlogging and Phytophthora infection. Given that we had bountiful rain this winter and orchards with standing water were common, continuous monitoring and collaboration with your PCA or farm advisor will be increasingly valuable. - [Walnut Winter Management UCCE Resources](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/winter-management-ucce-resources/) - If you haven't already, look at your orchard operation: take some time to Stop, Think, Observe, and Plan. Read for an overview on resources on topics on spray calibration, sanitation, codling moth mating disruption, pests, and more. - [Winter sanitation critical for reducing insect pest damage risk to almonds in 2023-2024](https://www.sacvalleyorchards.com/almonds/insects-mites/winter-sanitation-critical-in-2023-2024/) - Winter sanitation is becoming increasingly important. This past year many growers in the Sacramento Valley experienced levels of navel orangeworm (NOW) damage not seen since the early 1980s. A successful winter sanitation can reduce damage from NOW and other almond-eating pests, like the Carpophilus beetle. - [Wet years can lead to aerial Phytophthora outbreaks in almond orchards](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/aerial-phytophthora-outbreaks-in-wet-years/) - Pytophthora was detected as early as mid-February in Fresno County and reported statewide by the early summer of 2023. Almond growers should be prepared to respond to strengthening El Niño conditions and the possibility of a recurring outbreak of aerial Phytophthora. Read for insights about the disease symptoms, the pathogen biology, as well as some management guidelines for this relatively rare but serious disease of almond. - [Previous Southern Sacramento Valley ET Reports- October 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-october-2023/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- October 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-october-2023/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Southern Sacramento Valley ET Reports- September 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-september-2023/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- Semptember 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-september-2023/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Canker Management After Pruning/Hedging: Spray Now or Pay Later.](https://www.sacvalleyorchards.com/prunes/diseases-prunes/canker-management-spray-now-or-pay-later/) - A chronic disease like Cytospora canker is a leading killer of prune orchards. Practices that promote its spread start early in life, and spray timing is key. - [New UC ANR Website for Cover Cropping Information Resources](https://www.sacvalleyorchards.com/photos-from-the-field/new-ucanr-website-for-cover-cropping-resources/) - A new website features brand new cover cropping information resources and a searchable Expert Grower database for cover cropping practices in California orchards and vineyards. These resources provide detailed information on practical strategies for implementing cover crops and addressing common challenges. - [2023 brown apical necrosis (BAN) and late-season walnut blight](https://www.sacvalleyorchards.com/walnuts/diseases/2023-ban-and-late-season-walnut-blight/) - Nut samples were collected by UCCE advisors and analyzed and confirmed for BAN (brown apical necrosis) and walnut blight. If you observed BAN or walnut blight symptoms in your orchards this year, be aware that inoculum can remain for next year. BAN can lead to mold and reduce nut quality and yield, and walnut blight can reduce yield as infected nuts prematurely abort. - [“Field Visit: Nematode Management in Walnut” was held in Escalon, CA](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/field-visit-nematode-management/) - Establishing a new walnut orchard is a long-term investment that requires detailed planning to enable 35 to 40 years of bountiful and sustainable production. RLN is estimated to be present in 85% of California walnut orchard soils. Read to learn more. - [Bacterial blast/canker: What do we know?](https://www.sacvalleyorchards.com/almonds/foliar-diseases/bacterial-blast-canker-what-we-know/) - Bacterial canker/blast infections are most damaging, and potentially lethal, in stressed trees. Currently, there are limited control options for bacterial canker/blast in almonds. Read about factors influencing management practices and decisions. - [Spring 2023 retrospective: Bacterial Blast](https://www.sacvalleyorchards.com/almonds/foliar-diseases/spring-2023-retrospective-bacterial-blast/) - Blast is a challenging disease to control, given the limited number of available tools. This year, symptoms were common even in orchards which had received one or more copper dormant sprays (copper-resistant Pseudomonas populations are common throughout the state). - [Plant cover crops now to prepare for another wet winter](https://www.sacvalleyorchards.com/almonds/horticulture/plant-cover-crops-to-prepare-for-a-wet-winter/) - With weather forecasts for the upcoming winter months leaning heavily toward another wet and cold winter, the weeks immediately following harvest present the best time of the year to plant cover crops to reap their various benefits in the months ahead. Should El Niño bring heavy rainfall back to the region, any on-farm water capture that can be done should be done to keep as much water locally banked as possible. - [Introducing a Butte County Walnut Variety Trial](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/introducing-a-new-variety-trial/) - A ten-acre Butte County Walnut Variety Trial was planted at the Chico State Farm in May of this year through a collaboration between Chico State, UC Davis Walnut Improvement Program, and UC Cooperative Extension. This variety trial aims to identify new varieties that will perform exceptionally well in this region and will share its progress over the years. - [Winter Chill, Dormancy and Walnut Management](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/winter-chill-dormancy-and-management/) - Walnuts are one of the highest chill requirement tree crops in California but recent winters have fallen short of the chill needed for a tight, economical walnut bloom. With funding from the California Walnut Board, dormancy breaking treatments are being tested in California's conditions using products used to compensate for inadequate chill in other crops and countries. - [Thinking About Skipping or Shorting Nitrogen This Year?](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/nitrogen-this-year/) - Sensitivity to a lack of nitrogen will vary from orchard to orchard. We know that trees have much more nutrient storage capacity than annual crops, but how much of this can be relied upon to meet nitrogen demand, and when might it not be appropriate? - [Minimize Potential Sudden Autumn Freeze Damage](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/minimize-sudden-autumn-freeze-damage/) - Damage can occur with sudden autumn freeze, before trees go into dormancy. With sudden autumn freeze occurring in three of the last five years, preparations for these freeze events need to be a regular part of every walnut grower's summer and fall orchard operations. - [Twelve ways to ruin a prune orchard.](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/twelve-ways-to-ruin-a-prune-orchard/) - Good production of large fruit and sustained tree health are critical to maintaining profitable production. The following points highlight problems contributing to orchard decline. - [Postharvest Nutrition Review](https://www.sacvalleyorchards.com/almonds/horticulture/postharvest-nutrition-review/) - In uncertain times, put your money on proven practices and materials. Certain postharvest fertilizer inputs (boron, potassium, and zinc) when needed, are proven to deliver increased yield. At least one nutrient, nitrogen, when fall applied does not deliver yield benefit at this timing in well managed orchards. Understanding effective delivery for each nutrient is key - [Potassium review](https://www.sacvalleyorchards.com/almonds/horticulture/potassium-review/) - Don’t sleep on K for your orchard(s). It could cost you! - [Don’t Neglect Your Boron](https://www.sacvalleyorchards.com/almonds/horticulture/dont-neglect-your-boron/) - Almonds have a strange relationship with boron. With its effects on both yield and tree health, dialing in the boron levels in your orchard is well worth some attention. - [Update on Regional Almond Variety Trials - results through 2022](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/update-on-regional-almond-variety-trials-results-through-2022/) - With funding provided by the Almond Board of California, through assessments paid by almond growers, the University of California has conducted regional field trials in the major almond growing areas of the Central Valley for over 50 years. Read more for an update on Regional Almond Variety Trials - [Getting the best grower returns at harvest](https://www.sacvalleyorchards.com/blog/prunes-blog/getting-the-best-grower-returns-at-harvest/) - With high fruit sets and good growing conditions in 2023, maximize grower income by focusing on harvest timing and field sizing. The keys to a timely harvest are 1) get the largest, high-quality fruit to the dryer and 2) field sort to keep small, low value fruit out of the bins. - [Previous Southern Sacramento Valley ET Reports- August 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-august-2023/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- August 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-august-2023/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Northern Sacramento Valley ET Reports- July 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-july-2023/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Southern Sacramento Valley ET Reports- July 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-july-2023/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [NOW hullsplit spray considerations](https://www.sacvalleyorchards.com/almonds/insects-mites/now-hullsplit-spray-considerations/) - Hullsplit timing varies among tree water status, varieties, geographic regions, and weather conditions. Understanding NOW activity and hullsplit status is vital for timely insecticide applications. Research and field experience tell us that spraying earlier, rather than later, is the most effective strategy for reducing NOW damage. - [Previous Southern Sacramento Valley ET Reports- June 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-june-2/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- June 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-june-3/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Southern Sacramento Valley ET Reports- May 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-may-3/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- May 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-may-2/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Northern Sacramento Valley ET Reports- April 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-april-2/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Southern Sacramento Valley ET Reports- April 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-april-2/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Weather after 30 days after bloom helps plan thinning and harvest.](https://www.sacvalleyorchards.com/prunes/bloom/weather-after-bloom-helps-plan-thinning-and-harvest/) - Bloom date and cropload per tree still have the largest influence on harvest date and fruit size potential, but knowing GDH30 accumulation can be used to fine tune harvest and thinning planning. However, given cooler weather in the 30 days following 50% full bloom, knowing growing degree hours can better inform thinning planning. - [Navel Orangeworm Biofix in a Wet Spring](https://www.sacvalleyorchards.com/almonds/insects-mites/navel-orangeworm-biofix-in-a-wet-spring/) - The extremely wet winter this year has likely helped growers to kill more overwintering navel orangeworms (NOW) than in warmer and dryer winter years. However, a wet, cold winter will not kill all NOW, and being complacent might result in a bad NOW year. - [The most important task of the year.](https://www.sacvalleyorchards.com/prunes/bloom/the-most-important-task-of-the-year/) - There is no more important activity in prune growing than checking the crop load in late April (or early May this year?). Knowing the crop load (fruit/tree) in an orchard is the most critical piece of data needed to decide if shaker thinning is needed. - [Example 1 and 2 - Healthier Orchards with A Careful Start of Irrigation](https://www.sacvalleyorchards.com/blog/walnuts-blog/example-1-and-2-careful-start-of-irrigation/) - More details on the examples in "Healthier Orchards with A Careful Start of Irrigation in 2023." - [Healthier Orchards with A Careful Start of Irrigation in 2023](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/healthier-orchards/) - A careful approach to irrigation in 2023 is one way to both save money and help ensure you have a healthy and productive orchard. - [Strategies for orchard weed management hard economic situations](https://www.sacvalleyorchards.com/blog/walnuts-blog/strategies-for-orchard-weed-management-hard-economic-situations/) - Reducing weed control in orchards during difficult economic times is possible but comes with some tradeoffs. It’s useful to step back and remember why we’re controlling weeds in the orchard in the first place. - [Prioritizing Sprays When You Can't Afford Them All](https://www.sacvalleyorchards.com/blog/walnuts-blog/prioritizing-sprays-when-you-cant-afford-them-all/) - Determining the priority for pesticide sprays for insect pests is challenging. Integrated pest management uses cost/benefit analysis to guide growers and farm managers in making pest control decisions. - [Previous Northern Sacramento Valley ET Reports- June 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-june-2/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Northern Sacramento Valley ET Reports- April 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-april/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Northern Sacramento Valley ET Reports- May 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-may/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Accumulations started on February 25th 2022 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, and vineyards will begin - [Previous Northern Sacramento Valley ET Reports- July, 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-july/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Northern Sacramento Valley ET Reports- August, 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-august/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Southern Sacramento Valley ET Reports- March 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/southern-march/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- March 2023](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/northern-march/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Bookmark this page and visit weekly for the most current report. Accumulations started on March 10, 2023 for pasture, table and high density olives, citrus, almond, turf - [Previous Southern Sacramento Valley ET Reports- September 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-september/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Southern Sacramento Valley ET Reports- August, 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-august/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Southern Sacramento Valley ET Reports- October 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-october/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Southern Sacramento Valley ET Reports- July, 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-july/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Southern Sacramento Valley ET Reports- April 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-april/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Southern Sacramento Valley ET Reports- June 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-june/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for June 02- June 30, 2022. - [Previous Southern Sacramento Valley ET Reports- May 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/southern-may/) - This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for April 29-June 02, 2022. - [Previous Northern Sacramento Valley ET Reports- September 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-september/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Accumulations started on February 25th 2022 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, and vineyards will begin - [Previous Northern Sacramento Valley ET Reports- October 2022](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/northern-october/) - This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here. Accumulations started on February 25th 2022 for pasture, table and high density olives, citrus, almond, turf grass, and rainfall. Accumulations for prune, walnuts, and vineyards will begin - [Mechanical Pruning Trial in ‘French’ Prune – Through Year Four](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/mechanical-pruning-in-french/) - Work continues at the Red Bluff mechanical pruning trial initiated in 2019, thanks to the California Prune Board. - [February Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/february-2/) - Clarissa Reyes, North Sacramento Valley Orchard System Staff Research Associate Bees: Order bees, usually a 1 hive/acre stocking rate. Employ best management practices for maintaining hive health. Before making fungicide application, check for bees nearby using the ‘Bee Check’ tool on the BeeWhereCalifornia app or website. For more information, contact your county’s ag commissioner’s office. - [Rootstock Selection to Increase Tree Health, Longevity, and Yield in the Sacramento Valley](https://www.sacvalleyorchards.com/almonds/horticulture/rootstocks-to-increase-tree-health-longevity-and-yield/) - Selecting a rootstock when developing an orchard is a decision that will impact tree health and yield for the rest of the life of the orchard. Read more to learn what the University of California has learned from decades of testing rootstocks to understand their limitations. - [April Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/april-2/) - Read this article for prune orchard management tasks to keep in mind in April. - [May Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/may-2/) - Read this article for prune orchard management tasks to keep in mind in May. - [March Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/march/) - It is looking like spring outside, and prune bloom is picking up. Keep reading for prune orchard management tasks to keep in mind this month. - [Bloom weather and prune fruit set: what we know so far](https://www.sacvalleyorchards.com/prunes/bloom/weather-and-fruit-set-what-we-know-so-far/) - Crop failure in years with extreme bloom weather (cool or hot) challenges successful prune growing in California. A new bloom weather model is a good starting point to predicting crop potential and, eventually, managing risk of crop failure. - [Flooding and Almond Tree Survival](https://www.sacvalleyorchards.com/blog/almonds-blog/flooding-and-almond-tree-survival/) - An excerpt from The Almond Doctor on a tree's response to flooding. - [2022 Walnut Crop Loss and Poor Nut Quality – What happened?](https://www.sacvalleyorchards.com/blog/walnuts-blog/2022-nut-quality-what-happened/) - There are those years we like to leave behind, and 2022 will be at the top of the list for the walnut industry. Read for more information on the most likely environmental conditions that led to 2022 crop damage and subsequent yield losses and poor nut quality. - [Disease Management in Tight Budget Year](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/disease-management/) - Getting the best results, affordably, is vital to delivering the crop this year and next. Given that 2023 is off to a wet start, there is a possibility of increased disease pressure when compared to the last three years- making disease management even more important. - [Weekly Irrigation Scheduling Tracker (per tree)](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/irrigation-scheduling-tracker-per-tree/) - This tracker compares maximum hours of irrigation that may be needed during a week to actual hours applied. This tracker is limited to weekly use. It is not capable of tracking total irrigation for the season. Enter your orchard specific information into the yellow boxes and the results will display under the ‘Calculation Results’ heading - [Weekly Irrigation Scheduling Tracker (per acre)](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/irrigation-scheduling-tracker-per-acre/) - This tracker compares maximum hours of irrigation that may be needed during a week to actual hours applied. This tracker is limited to weekly use. It is not capable of tracking total irrigation for the season. Enter your orchard specific information into the yellow boxes and the results will display under the ‘Calculation Results’ heading - [Convert Weekly ET Estimates to Gallons per Tree](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/convert-inches-acre-to-gallons-tree/) - This calculator converts the weekly crop ET estimates reported as inches per acre to gallons per tree. Enter your orchard specific information into the yellow boxes and the results will display under the 'Calculation Results' heading below. See our FAQs for more information on using Weekly Crop ET Reports or check our other ET calculators - [Estimate of Maximum Hours of Irrigation Needed](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/estimate-hours-of-irrigation-needed/) - This calculator estimates the maximum weekly hours of irrigation need based upon weekly estimates of crop ET and the hourly water application rate of your system. The maximum weekly hours of irrigation may not be needed because in-season rainfall or soil storage may also supply the orchard with water. Feedback from monitoring plant water status with - [Water Application Rate Calculator for Minisprinkler and Solid Set Sprinklers](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/application-rate-calculator-minisprinkler-solid-set/) - This calculator computes the hourly water application rate of higher flow minisprinklers and solid set sprinklers. Use this calculator if sprinkler nozzles are rated in gallons per minute (GPM). Enter your orchard specific information into the yellow boxes and the results will display under the ‘Calculation Results’ heading below. See our FAQs for more information on - [Water Application Rate Calculator for Drip and Microsprinklers](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/application-rate-calculator-drip-micros/) - This calculator computes the hourly water application rate of lower flow drip or microsprinkler irrigation systems. Use this calculator if the drippers or microsprinklers are rated in gallons per hour (GPH). Enter your orchard specific information into the yellow boxes and the results will display under the 'Calculation Results' heading below. See our FAQs for - [Time for a Hard Look- Almonds](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/time-for-a-hard-look/) - The way forward to a better future is not clear. Forging ahead with the same practices and expecting a natural return to better times is looking like a long shot- it's time to stop, think, observe, and plan for the future. - [Time for a Hard Look- Walnuts](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/time-for-a-hard-look-2/) - The way forward to a better future is not clear. Forging ahead with the same practices and expecting a natural return to better times is looking like a long shot- it's time to stop, think, observe, and plan for the future. - [Management Practices for Improved Water Capture](https://www.sacvalleyorchards.com/almonds/irrigation/improving-water-capture/) - In the middle of a drought, there are several management practices that may improve the retention of limited water resources. Read ahead to learn how groundwater recharge, winter cover crops, organic matter, and tillage can affect your water conservation plan. - [After the Rain: Maintaining Nut Quality](https://www.sacvalleyorchards.com/blog/almonds-blog/maintaining-nut-quality-post-rain/) - Sacramento Valley received approximately 2" of rain during the last storm, leaving behind many wet almonds and challenging growers with reduced nut quality and decreased returns. Read ahead for best management practices for your situation. - [Six Steps to Prepare for the Next Sudden Autumn Freeze](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/prepare-for-next-sudden-autumn-freeze/) - In the Sacramento Valley, an autumn freeze has damaged walnut orchards every November for the last four years. Read this article for tips on freeze protection in your walnut orchard. - [When do you shake almonds?](https://www.sacvalleyorchards.com/blog/almonds-blog/when-do-you-shake/) - Historically, the recommendation from UC almond experts for the ideal time to shake was as soon as 100% hull split occurred throughout the orchard, however, these considerations vary widely among varieties and locations. Potential challenges that growers should consider when timing harvest include pest and disease management, nut removal/drying time, and nut quality. - [Should You Use Ethephon in a Lean Price Year?](https://www.sacvalleyorchards.com/blog/walnuts-blog/should-you-use-ethephon-in-a-lean-price-year/) - Posted on July 15, 2019 by Dani Lightle. Reposted on September 15, 2022 by Janine Hasey. Sure, you can harvest your walnuts this fall without application of any ethephon. Forgoing the ethephon application would save you material and spray costs. However, despite the costs of application, use of ethephon may wind up saving you money - [In-season-& Post-harvest Management of Navel Orangeworm (NOW)](https://www.sacvalleyorchards.com/blog/walnuts-blog/management-navel-orangeworm/) - Navel orangeworm is a pest remaining on most nut growers' and pest control advisors' minds regardless of the time of the year. Implementing in-season and post-harvest management strategies can minimize current and future navel orangeworm damage to an orchard. - [Five Practices to Help Prevent Bacterial Canker](https://www.sacvalleyorchards.com/prunes/diseases-prunes/preventing-bacterial-canker/) - Every year is a Cytospora canker year, and unfortunately, some years are also bacterial canker years. This spring farm advisors observed bacterial canker infections, read below for prevention practices. - [Insecticide Options for Navel Orangeworm IPM in Almonds—A Recent Trial Summary](https://www.sacvalleyorchards.com/almonds/insects-mites/insecticide-options-for-navel-orangeworm-ipm-trial-summary/) - Commonly used IPM practices should be combined with insecticides to achieve the best results. In the 2020/2021 seasons, we evaluated the efficacies of multiple insecticides against NOW using the previous season nut (i.e., mummy nut) strands as substrate. - [Pre-harvest Management of Brown Rot](https://www.sacvalleyorchards.com/prunes/diseases-prunes/pre-harvest-management-of-brown-rot/) - High humidity, high temperatures and tightly clustered fruit create the perfect environment for brown rot. Brown rot treatment sprays, where deemed necessary based on current season observations and block history, should begin 4-6 weeks before harvest and are only useful on uninjured fruit. - [Late-season Irrigation Management in Prune](https://www.sacvalleyorchards.com/prunes/irrigation-prunes/late-season-management/) - Producers should strive to maintain sufficient tree water status to maintain any current crop-load as well as overall tree and orchard health to help support crops in the coming years. Spring freezes and reduced water supplies have significantly affected production. When considering late-season irrigation strategies for prune trees, both the current and following season’s crops must be considered. - [Managing Mold in Walnut (Updated 2022)](https://www.sacvalleyorchards.com/walnuts/diseases/managing-mold/) - Growers and processors have reported elevated mold levels in harvested walnuts to farm advisors and Dr. Themis Michailides, UC Davis Plant Pathologist. Although all possible predisposing factors have not yet been investigated, conditions that compromise the integrity of the hull, such as walnut blight, sunburn or insect-damage can serve as an entry point for mold fungi. - [Is it time for a closer look at alternative nutrient sources?](https://www.sacvalleyorchards.com/blog/common-concerns/alternative-nutrient-sources/) - With continued tight nut markets and high input costs, it’s worth considering all nutrient input options in an effort to lower costs and maintain production. Sustainable nutrient management includes assessment of irrigation nitrate, adding compost manure amendments or almond shells, and using nitrogen-fixing cover crops. - [Protecting Sacramento Valley Waterways from Pyrethroid Exceedances](https://www.sacvalleyorchards.com/blog/common-concerns/protecting-sacramento-valley-waterways-from-pyrethroid/) - As farmers have reduced their reliance on organophosphate insecticides for pest control, there has been a shift to other control tactics. Most challenging for the topic of watersheds has been a shift towards increased use of pyrethroids. In general, the amounts found are low, nevertheless, cases of exceedances do occur, and these cases need to be eliminated. - [Applying Almond Hulls & Shells as Potassium-Rich Amendments](https://www.sacvalleyorchards.com/blog/almonds-blog/applying-amendments/) - New studies show that almond hulls and shells can be used as low-cost organic matter amendments and can release potassium into the soil. This can help increase soil exchangeable potassium with benefits to July leaf potassium values, and in the long term, could build soil organic matter content while reducing dust and erosion. - [Fertilizing Almonds after a Frost](https://www.sacvalleyorchards.com/almonds/fertilizing-after-frost/) - In a light crop year following frost, fertilizer savings are possible, but some fertilizer, especially N should be applied to maintain orchard health and crop potential for next year. - [Checking Cropload and Shaker Thinning Prunes](https://www.sacvalleyorchards.com/prunes/cropload-and-shaker-thinning/) - Shaker thinning can improve a grower’s bottom line this year and next year. Checking fruit number at or just before reference date, between April 20th and May 10th, can assist with orchard decisions. - [Irrigating Freeze Damaged Almonds in a Drought](https://www.sacvalleyorchards.com/almonds/irrigation/freeze-damaged/) - Record low temperatures on February 24 severely reduced nut set and limited almond yield across thousands of acres of orchards in the Sacramento Valley. The following are our best suggestions for irrigating to bring the remaining crop to market, and ensure good crop potential for next year. - [Spring- Preparing for Extreme Events: Frost](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/preparing-for-extreme-events-spring-frost/) - An April frost can have potentially devastating results. The last severe spring frost occurred in April 2008. During a frost event, there are many factors that influence whether or not frost damage will occur in a particular orchard. This article provides guidelines should a spring frost occur. - [Selecting the Best Walnut Rootstock for Your Situation](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/rootstock-2022/) - Rootstocks are the foundation of a walnut orchard. Selecting one with attributes that will tolerate or resist site problems, while providing the vigor for optimum tree performance, is key to orchard health and longevity. This article provides updates from the latest rootstock research statewide. - [2022 Walnut Blight Management Update](https://www.sacvalleyorchards.com/walnuts/diseases/2022-blight-update/) - For any pest or disease like walnut blight that requires pesticide application to keep in check, there are four key pillars to successful management: timing, material, rate, and coverage. Read more for the latest updates for managing walnut blight in 2022. - [Has It Been a Wet Winter?](https://www.sacvalleyorchards.com/almonds/irrigation/has-it-been-a-wet-winter/) - The 2021-2022 water year, which began on October 1st, got off to a promising start. Precipitation patterns brought snow to the mountains and rain to the valleys in amounts not seen for a few years. Unfortunately, a relatively dry January snapped us all out of dreams of a “normal” year and brought us back to our new (drier) reality. - [Potted Tree Irrigation After Planting: Getting the First Year Right](https://www.sacvalleyorchards.com/almonds/irrigation/potted-tree-irrigation-2022/) - Potted nursery trees are here to stay, but they have challenges and a learning curve for growers accustomed to planting bare root trees. One of the major challenges is irrigating during the orchard’s first year. - [Protecting Young Almond Trunks with Cartons](https://www.sacvalleyorchards.com/almonds/horticulture/young-trunks-cartons/) - It can be difficult to know when to replace or remove tree cartons. Being too early (photo 1) or late (photo 2) with carton removal has been the source of numerous farm advisor calls over the years. - [Weed Management in Young Almond Orchards](https://www.sacvalleyorchards.com/almonds/weed-control/weeds-young-almonds/) - Successful new plantings are key to the economic future of an almond growing operation. Any setbacks in new, non-bearing orchard growth or health can be costly, distracting and stressful. Weed management is a major management focus and potential stress point in young orchard development. - [Late Winter to Early Spring is the Most Effective Time for Gopher Management](https://www.sacvalleyorchards.com/almonds/vertebrates/early-spring-gophers/) - Late winter to early spring is the time of year that pocket gophers are usually cranking up their Barry White playlist. This reproductive pulse generally results in three to five young per litter, roughly doubling to tripling the population of gophers that feed on almond roots and crown. Reducing gopher populations ahead of this reproductive pulse is the most time-effective way to reduce gopher damage in your orchard. - [2022 Emergency Use (Section 18) Approved for Almond Bacterial Blast Material](https://www.sacvalleyorchards.com/almonds/foliar-diseases/2022-emergency-use-bacterial-blast/) - Bacterial blast (Pseudomonas syringe), although thankfully not a problem every year (hopefully including 2022), can be tremendously damaging to almond yields. For example, significant crop damage was reported in the Sacramento Valley in 2017 and 2018, and in the San Joaquin Valley in 2017 and 2019. These grower reports of past crop loss supported a Section 18 emergency request for the use of kasugamycin on almonds during bloom. - [Long Pruning for Greater Early Yields with Video](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/long-pruning-for-greater-early-yields/) - The higher the yield per acre early in the life of an orchard, the sooner the orchard covers development costs and returns a net profit to the grower. With new, well-anchored prune rootstocks now in the market, especially Krymsk 86 and Viking, it is worth reviewing young orchard pruning trial data. - [Prune Orchard Investments in a Better Market Year](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/prune-orchard-investments-in-a-better-market-year/) - Prune prices to California growers are influenced by world production volume that can change, dramatically, from year to year. Read this article for recommendations about how to prepare for next year. - [Previous South Sacramento Valley ET Reports- October 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/previous-south-sacramento-valley-et-reports-october-2021/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Staten Island, and Verona CIMIS stations. - [Three Steps to Combat Cytospora Canker](https://www.sacvalleyorchards.com/prunes/diseases-prunes/combat-cytospora-canker/) - Cankers caused by fungi of Cytospora spp. can severely limit prune production; reducing grower income and potentially leading to early orchard removal due to scaffold and/or tree loss. This article provides information about how to control Cytospora in your orchard. - [Previous Northern Sacramento Valley ET Reports-October 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/previous-northern-sacramento-valley-et-reports-october-2021/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations. - [Preparing for Extreme Events: Flood](https://www.sacvalleyorchards.com/walnuts/flooding/preparing-for-extreme-events-flood/) - Flooding from unprecedented flows of the Sacramento and Feather Rivers in early 2017 through spring, resulted in extensive orchard damage. Although there is little you can do to prepare against the most extreme flooding, some practices can help to reduce damage. - [Preparing for 2022](https://www.sacvalleyorchards.com/almonds/horticulture/preparing-for-2022/) - Plan for the worst, hope for the best. That’s a tough, solid, strategy as the 2021 season winds down and growers and PCAs look to 2022. Read this article for some considerations when following this strategy. - [November Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/november-2/) - Read this article for prune orchard management tasks to keep in mind in November. - [November Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/november/) - Read this article for walnut orchard management tasks to keep in mind in November. - [We're Hiring- Orchard Systems Area Advisor based in Tehama County!](https://www.sacvalleyorchards.com/blog/common-concerns/orchard-systems-area-advisor-based-in-tehama-county/) - The Orchard Systems Area Advisor will implement an innovative extension education and applied problem-solving research program for Food producing clientele of Tehama, Butte, Glenn and Shasta counties. See this post for more information and to apply! - [We're Hiring-Area IPM Advisor in Butte County](https://www.sacvalleyorchards.com/blog/common-concerns/were-hiring-area-ipm-advisor-in-butte-county/) - The Area IPM Advisor will implement an innovative extension education and applied problem-solving research program in IPM in Butte, Colusa, Glenn, Sutter, Yuba, and Tehama counties in coordination with the Statewide IPM Program. See this post for more information and to apply! - [Fall Walnut IPM – Looking Back and Looking Forward](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/fall-walnut-ipm-looking-back-and-looking-forward/) - Read this article for an update on codling moth and navel orangeworm pressure in 2021 as well as information on the emerging pest: flatheaded borer. - [October Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/blog/almonds-blog/almond-orchard-management-considerations-for-october/) - Read this article for almond orchard management tasks to keep in mind in October. - [December Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/december/) - Evie Smith, UCCE Staff Research Associate, Southern Sacramento Valley Katherine Jarvis-Shean, UCCE Orchard Advisor, Sacramento, Solano and Yolo Counties Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Please note that the following are general recommendations intended to help you keep track of regular practices in a busy time; the optimal timing for management practices - [November Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/november-3/) - Read this article for almond orchard management tasks to keep in mind in November. - [October Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/october-2/) - Read this article for prune orchard management tasks to keep in mind in October. - [Previous Northern Sacramento Valley ET Reports-September 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/nsv-september/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations. - [Previous South Sacramento Valley ET Reports- September 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/ssv-september/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Staten Island, and Verona CIMIS stations. - [Previous South Sacramento Valley ET Reports- August 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/ssv-august-2021/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Staten Island, and Verona CIMIS stations. - [Pistachio Nitrogen Nutrition: What do we know and how do we manage?](https://www.sacvalleyorchards.com/pistachio/horticulture-pistachio/nitrogen-nutrition/) - Given that N fertilizer mismanagement have increased significantly and the Irrigated Lands Regulatory Program (ILRP) have implemented new regulations to prevent agricultural runoff from impairing surface waters, it only makes sense to use available tools to improve Nitrogen Use Efficiency (NUE). This article provides more information about what tools are available. - [Climate & Management Considerations for Future Almond Orchards](https://www.sacvalleyorchards.com/almonds/horticulture/climate-management-considerations-for-future-almond-orchards/) - Recent years have brought hot temperatures, heat waves, droughts and rain that have broken records. What does that mean? And what can we do to plan for it in almond orchards? - [October Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/october/) - Read this article for walnut orchard management tasks to keep in mind in October. - [Are you choosing the right spray for the right weeds?](https://www.sacvalleyorchards.com/almonds/weed-control/are-you-choosing-the-right-spray-for-the-right-weeds/) - Smart, cost-effective weed control hinges on your ability to tailor your herbicide spray program to the specific weeds in your orchard. - [September Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/september/) - Read this article for walnut orchard management tasks to keep in mind in September. - [Previous Northern Sacramento Valley ET Reports-August 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/nsv-august-2021/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations. - [Pest Management Guidelines in New Mobile-Friendly Format](https://www.sacvalleyorchards.com/blog/common-concerns/pest-management-guidelines-in-new-mobile-friendly-format/) - UC IPM has launched a new, mobile-friendly format of the Pest Management Guidelines: Peach! - [Why the UCBI Pistachio Rootstock is Salinity Tolerant](https://www.sacvalleyorchards.com/pistachio/cultivars-rootstocks-pistachio/why-ucbi-is-salinity-tolerant/) - Read this article to learn more about why the UCBI pistachio rootstock has high salinity tolerance, and how salinity can be managed in pistachio orchards. - [September Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/september-3/) - Read this article for prune orchard management tasks to keep in mind in September. - [2021 Pistachio Irrigation: Mitigation Strategies for Drought](https://www.sacvalleyorchards.com/pistachio/irrigation-pistachio/strategies-for-drought/) - Pistachios are known for their ability to withstand drought, but the severity and length of a dry spell can result in high percentages of blanks, low shell splitting percentages, and reductions in overall yield. Read this article for strategies for managing drought in your pistachio orchard. - [September Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/september-2/) - Read this article for almond orchard management tasks to keep in mind in September. - [Hull tights caused by water stress](https://www.sacvalleyorchards.com/almonds/irrigation/hull-tights-caused-by-water-stress/) - Hull split has begun, indicating harvest is imminent. Drought conditions, heat waves, and timing with other orchard activities can make irrigation challenging. Water stress can interfere with hull split, and if severe, can result in hull tights. - [Maintaining Quality with Pick Up & Stockpiling Best Practices](https://www.sacvalleyorchards.com/almonds/horticulture/stockpiling/) - With another record statewide crop to be shaken, swept, and collected starting in August, will you and your handler be prepared? Research by Bruce Lampinen (UCCE Specialist, UC Davis) and others has shown that properly dried nuts are the key to maintaining quality and grower returns during stockpiling. - [Previous Northern Sacramento Valley ET Reports-July 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/nsv-july-2021/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations for July 2021. - [Getting the best grower returns at harvest](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/best-returns-at-harvest/) - Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Luke Milliron, UCCE Farm Advisor, Butte, Glenn, and Tehama Counties Richard Buchner, UCCE Farm Advisor Emeritus Tehama and Glenn Counties With harvest around the corner, harvest timing and field sizing are the management details to focus on to maximize grower income. The keys of timely harvest - [Previous South Sacramento Valley ET Reports-July 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/ssv-july-2021/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Dixon, and Verona CIMIS stations. - [Fruit set, 2021. What happened?](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/fruit-set-2021/) - Hot weather around full bloom coincided with local or statewide prune crop failures in 2004, 2005, 2007, 2013, and 2020. What do we know about how high temperatures affect prune fruit set, and what can we do about it? - [August Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/august-3/) - Read this article for walnut orchard management tasks to keep in mind in August. - [Ant Management](https://www.sacvalleyorchards.com/almonds/insects-mites/ant-management/) - Protein feeding ants can cause significant nut damage between shaking and pickup. Read this article for information about how to reduce ant damage to your crop. - [August Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/august-2/) - Read this article for prune orchard management tasks to keep in mind in August. - [July Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/july-3/) - Read this article for prune orchard management tasks to keep in mind in July. - [For a Healthy Orchard Next Spring, Follow Through on Late Season Irrigation in Your Prune Orchard](https://www.sacvalleyorchards.com/prunes/irrigation-prunes/late-season-irrigation/) - For the best returns and orchard health, ease up on irrigation before harvest, and after harvest keep up with irrigation until leaf drop. - [August Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/august/) - Read this article for almond orchard management tasks to keep in mind in August. - [July Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/july-2/) - Read this article for almond orchard management tasks to keep in mind in July. - [Box Hedging May Decrease Sunburn in Prunes](https://www.sacvalleyorchards.com/photos-from-the-field/box-hedging-decrease-prune-sunburn/) - High temperature and light conditions promote sunburn damage in prune orchards. This year’s higher-than-average temperatures through the spring and early summer have resulted in higher reported and observed levels of sunburn on prune fruit in the Sacramento Valley. Mechanical hedging may provide a new tool to help mitigate sunburn damage as we see more days of extreme heat annually. - [Almond Hull Split Spray Considerations in a Tight Fiscal Year](https://www.sacvalleyorchards.com/almonds/insects-mites/hull-split-spray-tight-fiscal-year/) - In a tight fiscal year, the decision of whether or not to make a hull split spray is an easy one: do it. However, the number of hull split sprays, and how much money to put in the tank during each spray, are valid topics for discussion. - [Using a Pressure Chamber is Worthwhile](https://www.sacvalleyorchards.com/manuals/stem-water-potential/using-a-pressure-chamber-is-worthwhile/) - Visual cues of crop stress are among the most basic observations that can be used to manage irrigation in orchard crops. However, these cues can be somewhat subjective and are often expressed after plant stress is higher than desired. Measuring midday stem water potential (SWP) using a pressure chamber is a quantitative method for evaluating plant water status. - [Soil Moisture Sensor Selection is Confusing](https://www.sacvalleyorchards.com/blog/soil-moisture-sensor-selection-is-confusing/) - So, every few weeks the question comes up of whether to install soil moisture meters which leads to the question of which to buy and install or have installed. And then come the questions of what do the readings mean and why aren't the readings consistent? Or maybe this question arrives after the grower has installed the sensors or system and the values don't conform to a known or knowable pattern. - [Young Orchard Weed Management](https://www.sacvalleyorchards.com/almonds/weed-control/young-orchard-weed-management/) - Weeds in young orchards compete with trees for orchard resources such as sunlight, water and nutrients. This can lead to reductions in growth and future yields. If weed stands are allowed to mature, not only are they harder to control via chemical and mechanical methods, but they can also create cover for voles and gophers, which can then damage tree trunks, root systems and irrigation systems. - [Weed Management Tools](https://www.sacvalleyorchards.com/uncategorized/weed-management-tools/) - Adapted from the article “Tools for Weed Management Decisions in Orchard Crops” by Brad Hanson, UC Extension Weed Specialist, Davis in the February 2012 Sacramento Valley Walnut News. Weed control issues and management tools sometimes seem like a constantly moving target. Weed species shift as orchards age, new species sometimes appear, and herbicide resistant species - [Pre- and Post-Herbicide Performance on Threespike Goosegrass](https://www.sacvalleyorchards.com/almonds/weed-control/pre-and-post-herbicide-performance-on-threespike-goosegrass/) - Drew Wolter, Junior Specialist Horticulture Intern, UCCE Sutter-Yuba Counties; and Brad Hanson, Weed Science Specialist, UC Davis Threespike goosegrass was first reported in California in 1967. Since then, this species has become a significant concern in almonds and other orchard cropping systems throughout the Central Valley and growers have observed poor control with glyphosate. Tufted - [New EPA Paraquat Restrictions](https://www.sacvalleyorchards.com/almonds/weed-control/new-epa-paraquat-restrictions/) - As the 2020 growing season approaches, California growers, PCAs and handlers will have new regulations to take into consideration. The United States Environmental Protection Agency (EPA) recently announced the new requirements for handling paraquat (paraquat dichloride). The new EPA restrictions on paraquat aim to help protect Restricted Use Pesticide handlers, and others who may come into contact with these pesticides. However, these requirements will have a ripple effect on growers, distributors and the California agriculture community. Label changes emphasizing paraquat toxicity, restrictions and safe handling were completed November 2019. - [Increase Your Return on Investment with Post-Harvest Weed Scouting](https://www.sacvalleyorchards.com/almonds/weed-control/post-harvest-weed-scouting/) - Post-harvest scouting offers an opportunity to evaluate the current year’s orchard floor management plan, allowing you to see what weed species have escaped that year’s management plan, where they are, and how severe the infestation may be. These are all valuable pieces of information, which help design a management program that can meet the specific needs of the orchard from year to year. - [Building an Effective Orchard Weed Management Program](https://www.sacvalleyorchards.com/almonds/weed-control/building-an-effective-orchard-weed-management-program/) - Adapted from the articles “Building an effective orchard weed management program” by Brad Hanson, UC Cooperative Extension Specialist, UC Davis and “Planning your weed management program” by Andrew Johnson, former UCCE, Almond Board of California Intern in the Sacramento Valley Almond News, September 2009 and October 2012, respectively. Effectively reducing weed populations in orchards requires - [Step by Step Gopher Control](https://www.sacvalleyorchards.com/almonds/vertebrates/step-by-step-gopher-control/) - Adapted from the article “Gopher Control” by Gabriela Ritokova, former UC Almond Board Farm Advisor Intern, South Sacramento Valley, in the October 2011 Sacramento Valley Almond News Pocket gophers cause problems in many crops in California. Gophers spend their lives underground in tunnel systems where they can feed on tree roots and vegetation at the - [Pocket Gopher Management](https://www.sacvalleyorchards.com/almonds/vertebrates/pocket-gopher-management/) - Roger A. Baldwin, UCCE Wildlife Specialist, Wildlife, Fish, & Conservation Biology, UC Davis and Joseph Connell, UCCE Farm Advisor Emeritus, Butte County Pocket gophers (Thomomys spp.) may be responsible for more damage to orchards than any other mammal species. It’s essential to minimize their presence in orchards and this is particularly important for young trees - [Pocket Gopher and Ground Squirrel Management](https://www.sacvalleyorchards.com/almonds/vertebrates/pocket-gopher-and-ground-squirrel-management/) - Managing these vertebrate pests is a year-round task. Gophers can be controlled with most methods throughout the year but squirrel control methods change with the seasons depending on the squirrel biology. This article will outline the control methods but also inform you about some outstanding online resources that are useful to learn new information, understand seasonal cycles, and determine the best control methods to use. - [Get those Gophers!](https://www.sacvalleyorchards.com/photos-from-the-field/get-those-gophers/) - Walk your orchard blocks to look for fresh horseshoe shape and plugged side hole of pocket gopher mounds. This postharvest period is a key time to manage your gopher problem and make sure you’re giving yourself a clean slate for 2020! - [July Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/july/) - Read this article for walnut orchard management tasks to keep in mind in July. - [Previous Northern Sacramento Valley ET Reports-June 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/northern-june/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations. - [Previous South Sacramento Valley ET Reports-June 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/south-june/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Dixon, and Verona CIMIS stations. - [2020 Walnut Freeze: Road to Recovery](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/2020-freeze-recovery/) - 2020 brought yet another major autumn freeze. This article contains information about why the damage was so severe and what to do about it now. - [Large and Small Bug Control in Pistachio](https://www.sacvalleyorchards.com/pistachio/insects-mites-pistachio/large-and-small-bug-control/) - Excerpt from the article "Large and Small Bug Control in Pistachio" by Phoebe Gordon, UCCE Madera and Merced, and Houston Wilson, UC Riverside on the San Joaquin Valley Trees and Vines website. There are a handful of species that attack pistachio fruit, broadly classified based on their size. Small plant bugs will feed on pistachios, - [Activator Spray Adjuvant Selection](https://www.sacvalleyorchards.com/walnuts/diseases/adjuvant-selection/) - This article describes ingredients and functions of activator adjuvants commonly sprayed on tree and vine crops. - [2021 Pistachio Irrigation: Drought Mitigation Strategies](https://www.sacvalleyorchards.com/pistachio/irrigation-pistachio/drought-mitigation/) - Limited water supplies and increasing costs will lead to tough decisions about when is the most beneficial time to irrigate pistachios this season. Read this article to learn more about principles and tools for drought mitigation strategies in pistachios. - [Resurgence of Perennial Phytophthora Canker Disease of Almonds](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/phytophthora/) - Many species of Phytophthora continue to cause serious losses in California almond orchards. Read this article to learn more about the many forms Phytophthora symptoms can take, how infections occur, and how to avoid them. - [Previous South Sacramento Valley ET Reports- May 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/south-sac-valley-may-2021/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Dixon, and Verona CIMIS stations. - [Previous Northern Sacramento Valley ET Reports- May 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/north-valley-may-2021/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations. - [Previous Northern Sacramento Valley ET Reports- April 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/nsv-april-2021/) - Irrigation Evapotranspiration (ET) Report for Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams) CIMIS stations. - [June Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/june-3/) - Read this article for almond orchard management tasks to keep in mind in June. - [June Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/june/) - Read this article for walnut orchard management tasks to keep in mind in June. - [June Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/june-2/) - Read this article for prune orchard management tasks to keep in mind in June. - [UC Drought Management Resources for almond, prune, walnut, and olive orchards](https://www.sacvalleyorchards.com/blog/uc-drought-management-resources/) - As of May 12, 2021, a drought emergency has been declared for 41 CA counties. This blog’s purpose is to share several University of California drought resources that have been created and vetted to support growers during this challenging year. - [Photos from the Field: Identifying Damage from Deer Mice in Almond Orchards](https://www.sacvalleyorchards.com/photos-from-the-field/deer-mice-in-almond-orchards/) - Deer mice are rarely a problem in orchards in California, but when present they can cause damage to irrigation lines and nuts in almond trees, as we found on a recent farm call. The mice were taking advantage of cracks in the shrink-swell soil to more easily create their burrows, which we may see more of in the future as more orchards with drip irrigation come into bear on these shrink-swell soils. - [September- Time to Think About Cover Crops in Walnuts](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/time-to-think-about-cover-crops-in-walnuts/) - Fall is rapidly approaching, and with it is the appropriate planting time for a cover crop in walnuts. - [Fall- Preparing for Extreme Events: Freeze and Fire](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/preparing-for-extremes-freeze-fire/) - The sudden November 2018 freeze event that caused extensive damage in many walnut orchards is a stark reminder that we must do our best to prepare against extreme events. - [Chilling Hours Update 2020 - Yuba City](https://www.sacvalleyorchards.com/blog/walnuts-blog/chilling-hours-update-2020-yuba-city/) - How are we doing on chill so far this year? Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chill based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. - [Chilling Hours Update 2019 - Yuba City](https://www.sacvalleyorchards.com/blog/walnuts-blog/chilling-hours-update-yuba-city-2019/) - How are we doing on chill so far this year? Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chill based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. - [Chilling Hours Update 2018 - Yuba City](https://www.sacvalleyorchards.com/blog/walnuts-blog/chilling-hours-update-yuba-city-2018/) - How are we doing on chill so far this year? Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chill based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. - [May Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/may/) - Read this article for almond orchard management tasks to keep in mind in May. - [May Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/may-3/) - Read this article for walnut orchard management tasks to keep in mind in May. - [Walnut Autumn Freeze Event and Spring Regrowth Update, 2018](https://www.sacvalleyorchards.com/photos-from-the-field/walnut-autumn-freeze-event-and-spring-regrowth-update/) - A sudden autumn freeze event last November is the likely cause of widespread dieback observed in both young and mature orchards in the Sacramento and northern San Joaquin Valleys this spring. Following reports in April of walnut orchards not leafing out, our initial diagnosis was freeze damage. We advisors, specialists, and faculty agree that this initial diagnosis has been further supported after examining additional orchards and weather station sites. - [November 2020, Another Major Autumn Freeze in California Walnuts](https://www.sacvalleyorchards.com/blog/walnuts-blog/november-2020-freeze/) - As if 2020 didn’t bring enough grief, it appears to have also brought a major autumn freeze that growers and their consultants are now taking stock of. UCCE walnut advisors in the northern Sacramento Valley and Northern San Joaquin Valley have been fielding calls in the past couple weeks regarding extensive damage in young and mature orchards. - [Previous South Sacramento Valley ET Reports- April 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/south-sacramento-valley-april-2021/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Dixon, and Verona CIMIS stations. - [Pre- and Post-Harvest Irrigation Management in Prune](https://www.sacvalleyorchards.com/prunes/irrigation-prunes/pre-and-post-harvest/) - Read this article to learn more about irrigation management for prune orchards using crop developmental stages and stem water potential measurements. - [Almond May Spray Considerations in a Tight Fiscal Year](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/may-spray/) - When almond prices are low, how can a grower cut costs? Not all insects and mites need to be treated every year, and there are cases where almond growers have a history of spraying more than is necessary. Read this article to learn how to refine your pest management strategy in a lean price year. - [Lean Price Year Almond Nutrient Management](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/nutrient-management/) - When prices are lean almond farming is tough business. Read this article to learn about nutrient management considerations when prices are low. - [April Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/april/) - Read this article for almond orchard management tasks to keep in mind in April. - [Post-Harvest Walnut Navel Orangeworm Update-2016](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/post-harvest-walnut-navel-orangeworm-2016/) - Now that the 2016 season has come and gone, it is a good time to reflect on pest management issues and use information learned to improve our IPM program in the coming year. Navel orangeworm (NOW) appeared to be a significant factor again in 2016 in walnut damage assessments. A number of growers and PCAs were caught off-guard by the worm damage present in 2016. Here are some considerations for planning your integrated NOW management program for 2017. - [Scale Pests, Navel Orangeworm, and Flatheaded Borers](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/scale-pests-navel-orangeworm-and-flatheaded-borers/) - As we ring in the new year, there are a few pest management considerations during the dormant and delayed-dormant period that should be on your radar. Cost-saving measures are always an important consideration, particularly in “lean” commodity price years. The basis of Integrated Pest Management (IPM) theory centers around economic concepts – treating pest populations - [Variable Bloom Weather Leads to Variable 2020 Prune Crop](https://www.sacvalleyorchards.com/prunes/bloom/variable-2020-prune-crop-2/) - The 2020 prune bloom and crop set monitoring carried out by UCCE farm advisors showed dramatic differences in the prune set between different prune production regions. Some orchards require thinning this year, while some will achieve great fruit size without thinning. - [Missing the Target: Why you Should Irrigate Potted Trees Directly onto Potting Media](https://www.sacvalleyorchards.com/blog/almonds-blog/why-you-should-irrigate-potted-trees-directly-onto-potting-media/) - Generally, when I am working with growers on a problem related to potted-tree establishment, the cause is lack of water movement into the potted media, creating tree stress. This results from the difference in soil particle size at the boundary between the orchard soil and the tree’s potting soil. - [Training and Pruning Almond Orchards](https://www.sacvalleyorchards.com/almonds/horticulture/training-and-pruning-almond-orchards/) - In a typical year, most almond orchards would have already been pruned by now. However, with the rainy conditions, some growers haven't been able to get crews through the fields yet. See the full post for two videos (one in English, the second in Spanish) on pruning young almond trees. - [Potential Damage from Overwatering & Waterlogging](https://www.sacvalleyorchards.com/almonds/horticulture/potential-damage-from-overwatering-waterlogging/) - Adapted from the article “Waterlogged orchards” by Bill Krueger, UC Farm Advisor, Glenn County in the February 2011 Sacramento Valley Orchard News A saturated soil profile can damage orchards in two ways. First, tree roots respire and require oxygen. Saturation in the root zone can suffocate roots resulting in damage or death. Second, Phytophthora, a - [Protecting Almonds from Damage at Planting](https://www.sacvalleyorchards.com/almonds/horticulture/planting-almonds/) - Adapted from “Guidelines for planting almonds” by Bill Krueger, UC Farm Advisor, Glenn County in the January 2012 Sacramento Valley Almond News. Plant only into soil that is at field capacity or drier. Planting into wet soil can cause compaction, rutting, and glazed tree holes. Make the planting hole just deep and big enough to - [Yellowing Krymsk?](https://www.sacvalleyorchards.com/almonds/foliar-diseases/yellowing-krymsk/) - The continued saturation of tree root zones may lead to nutrient deficiency symptoms from reduced root activity. Sometimes these deficiencies are transient and symptoms resolve as the soil dries out and warms up. However, if the season progresses and the soils warm up but stay oversaturated, the symptoms may persist or trees may show the “yellowing Krymsk” problem. - [March Walnut Orchard Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/march-2/) - It is looking like spring outside! Keep reading for walnut orchard management tasks to keep in mind this month. - [March Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/march-2021/) - It is looking like spring outside, and almond bloom is winding down. Keep reading for almond orchard management tasks to keep in mind this month. - [February Almond Orchard Management Considerations](https://www.sacvalleyorchards.com/almonds/year-round-management/february/) - Print off this checklist to make sure you don't miss any important orchard tasks during almond bloom! - [Online Tools for Orchard Establishment and Management](https://www.sacvalleyorchards.com/almonds/horticulture/online-management-tools/) - There are several online tools and phone applications that can facilitate the process of site evaluation and planning for a new orchard. Read this article to learn more. - [Revisiting Your Codling Moth IPM Program in a Lean Crop Year](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/revisiting-your-codling-moth-ipm-program/) - The foundations of Integrated Pest Management (IPM) are rooted in economics. Putting a well-established IPM program in use can help you address the following questions: What are my best options and timings for treating economically-damaging populations? Particularly in years where crop prices are relatively low, taking an IPM approach has the potential to save cost inputs. - [Irrigating with lower quality water? What to consider first.](https://www.sacvalleyorchards.com/almonds/irrigation/lower-quality-water/) - Given low precipitation this past winter and low surface water allocations, many growers may be faced with the difficult prospect of using lower quality water for irrigation this season. What should be considered before irrigating with lower quality water? - [Weekly Crop Evapotranspiration (Crop ET) Reports Are Available to Assist Farm Water Management](https://www.sacvalleyorchards.com/irrigation-mgmt/using-et-reports/weekly-crop-evapotranspiration-crop-et-reports-are-available-to-assist-farm-water-management/) - The Northern Region of the California Department of Water Resources and the University of California Cooperative Extension in Tehama and Glenn counties have teamed up to provide Weekly ET Reports to agricultural water users. Reports include water use information for a variety of crops. This article outlines background information about the reports and ways to use them in on-farm water management. - [Pruning Prunes - Hand vs. Mechanical Pruning (2016)](https://www.sacvalleyorchards.com/prunes/pruning-prunes-hand-vs-mechanical-pruning/) - Adapted from the articles “Hand and mechanical pruning comparisons for French prunes” by Bill Krueger, Farm Advisor, Franz Niederholzer, Farm Advisor, Erick Nielsen, Grower cooperator and Charles Garcia in the October 2009 Sacramento Valley Prune News Prune trees are pruned to thin fruitwood, improve fruit size, reduce alternate bearing and control tree size and shape. - [New walnut variety ‘UC Wolfskill’ released](https://www.sacvalleyorchards.com/walnuts/orchard-development/uc-wolfskill-variety/) - The UC Davis Walnut Breeding Program has recently released a new walnut variety, ‘UC Wolfskill’ that produces kernels that may have a comparable market value to 'Chandler'. Read this post to learn more. - [Pulling the trigger for the start of irrigation in the spring: Too much too soon for walnuts?](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/spring-start/) - Research findings in a Red Bluff, CA walnut orchard have seriously challenged the conventional wisdom that walnut growers should start irrigation early in the spring to save deep soil moisture ‘in the bank’ for use later in the season. Read this post to learn more. - [Mechanical Pruning of Prune Trees Update (2021)](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/mechanical-pruning/) - In this article we will provide the latest information on the “why” of mechanical pruning, yields of hand vs. mechanically pruned trees, as well as the when, and how to mechanically prune. - [Whole Orchard Recycling and Anaerobic Soil Disinfestation](https://www.sacvalleyorchards.com/almonds/horticulture/wor-and-asd/) - In this article, we highlight two practices, whole orchard recycling (WOR) and anaerobic soil disinfestation (ASD), as potential elements in new orchard replacement strategies. - [Previous South Sacramento Valley ET Reports- March 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/previous-ssv-et-march-2021/) - Irrigation Evapotranspiration (ET) Report for Woodland, Davis, Dixon, and Verona CIMIS stations. - [Previous Northern Sacramento Valley ET Reports - March 2021](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/previous-nsv-et-march-2021/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Prune Bloom Review, 2020](https://www.sacvalleyorchards.com/prunes/bloom/2020-review/) - While it’s hard to be certain what caused the light prune crop in 2020, warm temperatures before and after bloom might have been a contributing factor. - [Phytophthora Root and Crown Rot & Paradox Canker Disease in Walnuts](https://www.sacvalleyorchards.com/walnuts/diseases/root-canker/) - Walnut trees affected by Phytophthora root and crown rot and Paradox canker disease may have decreased yield and vigor for a few years before succumbing to the disease. This article provides resources for identification and control of these diseases. - [Early Season Irrigation: Do We Know When to Start?](https://www.sacvalleyorchards.com/blog/almonds-blog/early-season-irrigation-do-we-know-when-to-start/) - One of the motivations for making good water management decisions early in the growing season is to reduce risk of root and crown diseases that can eventually kill almond, walnut, prune, and other tree species. Early season water management influences the environment where roots grow by affecting soil temperature and aeration and can be pivotal in how much tree decline actually occurs. - [Putting Weekly Crop ET Reports to Work for You](https://www.sacvalleyorchards.com/blog/intro-and-basics/) - This tutorial consists of four videos adding up to slightly more than one hour of instruction for growers and consultants. It introduces free weekly crop ET reports. They are heavily geared towards orchard crops and are available throughout the Central Valley of California. Discussion includes who provides these weekly reports, why, and how to access - [Using Weekly Crop ET Reports in Young Developing Orchards](https://www.sacvalleyorchards.com/blog/young-orchards/) - This tutorial consists of three shorter videos which combine for about 40 minutes of instruction. It focuses on making irrigation decisions in orchard crops during the early years of orchard establishment, as the trees grow from transplants to the early fruit bearing years. The videos provide instruction on how to adjust the weekly crop ET - [Putting Weekly Crop ET Reports to Work for You - Soils Perspective](https://www.sacvalleyorchards.com/blog/soils-perspective/) - This tutorial introduces the challenges that soils with variable water holding capacity and uncertainty about effective root zones of crops poses to on-farm water management. We consider how these weekly reports of crop ET can be related to site specific knowledge of the soils and crop root zone to help make irrigation scheduling decisions throughout - [Using Weekly Crop ET Reports - From a Tree Perspective](https://www.sacvalleyorchards.com/blog/tree-perspective/) - This tutorial consists of three videos. We explore how managed levels of crop stress can benefit some crops when employed properly by reducing risk of disease, aiding crop maturity, and optimizing water and energy inputs. We discuss how soil moisture deficits resulting from crop ET relate to tree water status. We provide brief instruction and - [Using Weekly Crop ET Reports - Gateway to Advanced On-Farm Water Management](https://www.sacvalleyorchards.com/blog/advanced-water-management/) - This tutorial consists of a single video. In it, we revisit briefly why we offer the weekly crop ET reports. It has been our experience that once growers and crop consultants become familiar with how to apply the weekly crop ET reports and associate them with specific irrigation system designs and soils, that often leads - [Chilling Hours Update 2021-Yuba City](https://www.sacvalleyorchards.com/blog/walnuts-blog/chilling-2021-yuba/) - Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chilling based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. - [Emergency Use (Section 18) Approved for Almond Bacterial Blast Material](https://www.sacvalleyorchards.com/blog/almonds-blog/emergency-section-18-2021/) - Bacterial blast (Pseudomonas syringe), although thankfully not a problem every year (hopefully including 2021), can be tremendously damaging to almond yields. For example, significant crop damage was reported in the Sacramento Valley in 2017 and 2018, and in the San Joaquin Valley in 2017 and 2019. These grower reports of past crop loss supported a Section 18 emergency request for the use of kasugamycin on almonds during bloom. - [Can trunk paint mitigate herbicide damage in young almond trees?](https://www.sacvalleyorchards.com/almonds/weed-control/paint-on-young-trees/) - In order to assess the efficacy of white latex paint in mitigating herbicide damage, a field experiment was conducted in Arbuckle, CA to evaluate the impacts of latex paint on herbicide injury in young almond trees. Preliminary results indicate that in most treatment combinations, old and new paint as trunk protection methods did not reduce tree stress caused by trunk-applied herbicides. - [Hive Strength and Bee Health/Safety](https://www.sacvalleyorchards.com/almonds/pollination/hive-strength-bee-health/) - A large almond crop at harvest requires good bee activity at bloom in the orchard. Read to learn more about best practices for keeping bee hives in your orchard strong and healthy at bloom. - [Krymsk 86 rootstock: Superb anchorage in gale-force winds](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/krymsk-86-anchorage/) - The aftermath of gale-force winds in the southern Sacramento Valley last week has further highlighted the importance of selecting prune rootstocks with good anchorage. In commercial orchards and trials alike, Krymsk 86 rooted prune trees consistently withstand applied force better than most other rootstocks. - [What new research into carbohydrates is teaching us about California orchards](https://www.sacvalleyorchards.com/almonds/horticulture/carbohydrates-orchards/) - Orchards up and down the Central Valley sit bare and leafless during winter. But just because we can’t see active growth with our eyes, doesn’t mean the trees themselves aren’t active. Recent years of research by the Zwieniecki lab (the Z Lab) at UC Davis, including the Carbohydrate Observatory, have been shedding light on what is happening in orchard trees during their yearly cycles, including during this dormant period. This research has been used to better explain how trees may be counting winter chill and spring heat. - [Ganoderma Butt Rot Spore Survey](https://www.sacvalleyorchards.com/blog/almonds-blog/ganoderma-survey/) - Ganoderma butt rot has been responsible for almond trees falling over all throughout the Central Valley. In order to better focus our management efforts, researchers must conduct a spore survey that will help us determine the times and locations that are at greatest risk of infection and spread by spores. - [Weed Technology Survey](https://www.sacvalleyorchards.com/blog/weed-tech-survey/) - A team of weed scientists from UC Davis, Oregon State University, and Cornell are asking berry, tree fruit, tree nut, and vine crop growers to take 5 to 10 minutes and answer this short and anonymous survey (link below) about your current weed management practices and your interest in novel technologies, like vision-guided sprayers and cultivators, and electric, steam, and pressurized water weeders. This will help us plan research and extension projects that will address stakeholder concerns regarding the future of weed management. - [Current South Sacramento Valley ET Report - November 13, 2020](https://www.sacvalleyorchards.com/irrigation-mgmt/2020-et-reports/current-south-sacramento-valley-et-report-march-13-2020/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Current Northern Sacramento Valley ET Report - November 13, 2020](https://www.sacvalleyorchards.com/irrigation-mgmt/2020-et-reports/current-northern-sacramento-valley-et-report-03-13-2020/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Walnut Rootstock Preference Survey](https://www.sacvalleyorchards.com/blog/walnuts-blog/rootstock-survey/) - Here’s your chance to influence the direction of walnut rootstock development! Tell UC and Fresno State your preferences in rootstock attributes and how much you’d value those enhanced characteristics. Take this anonymous survey. It should take less than 10 minutes to complete. - [Orchard Sanitation is Key to a Quality Crop](https://www.sacvalleyorchards.com/almonds/insects-mites/sanitation/) - Navel orangeworm (NOW) is the key pest of almonds, causing more income loss due to reject nuts than any other pest. Pesticide sprays, alone, cannot control this pest. A combination of several specific practices has been proven to reduce NOW damage and limit loss of grower income. The first of these practices on the orchard calendar is sanitation. - [Almond Leaf Scorch](https://www.sacvalleyorchards.com/almonds/foliar-diseases/almond-leaf-scorch/) - Beginning in late June, several PCAs and growers reported trees in almond orchards in the Sacramento Valley with symptoms like those of almond leaf scorch (ALS), a disease caused by the bacterium Xylella fastidiosa. UC farm advisors and UC and USDA plant pathologists have begun a survey to confirm disease presence and improve understanding of the disease in the Sacramento Valley. - [Cytospora: A Prune Grower’s Archnemesis](https://www.sacvalleyorchards.com/prunes/diseases-prunes/cytospora-signs-management/) - Cytospora canker can severely limit prune production; reducing grower income and potentially lead to early orchard removal due to scaffold and/or tree loss. This bark disease is not new to prune orchards in California, but in recent years there has been a dramatic increase in this disease in some orchards. All prune growers and PCAs should know its symptoms and management strategies. - [Fall & Winter Prune Orchard Management Considerations](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/fall-winter/) - Fall and winter orchard management considerations range from irrigation and plant nutrition to weed, pest and disease management. - [We're hiring!](https://www.sacvalleyorchards.com/blog/almonds-blog/hiring-southsacval/) - UC is hiring a Staff Research Associate to support the UC Cooperative Extension Orchards research and extension programs in the southern Sacramento Valley. If you know any hard-working folks looking to work in agricultural research and extension, please pass along this opportunity. - [Walnut Cultivar Table](https://www.sacvalleyorchards.com/walnuts/orchard-development/cultivars/) - The University of California's Walnut Improvement Program has been hard at work for decades breeding varieties with characteristic that are desirable to both growers and consumers. The following table compares many industry standards with more recent releases. - [Post-harvest Management Considerations](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/post-harvest/) - Katherine Jarvis-Shean, UCCE Orchard Advisor, Sacramento, Solano and Yolo Counties Post-harvest If you are pruning this dormant season, prune as early in the fall as possible to avoid Botryosphaeria infections. Winter pruning resulted in infection in 78 to 99 percent of cut shoots, compared to only 28 to 75 percent in fall-pruned shoots. At minimum, - [Tree and Orchard Replanting Considerations in a Lean Price Year](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/replanting/) - When prices are lean walnut farming is tough business. Farm advisors are not economists or financial advisors. However, farm advisors can be useful in providing best practices for economically sustainable production. Two key economic decisions growers face are when to replant individual trees and when to remove and replant entire orchards. - [Ethephon in a Straggled Leaf-Out, Lean Price Year](https://www.sacvalleyorchards.com/blog/walnuts-blog/ethephon-straggled-leaf-out/) - Given this spring's prolonged leaf-out window, it is likely that there will also be a wide window in the timing of hull split and a need for two shakes in some varieties. Ethephon is a commonly used tool for advancing hull split and harvest-readiness in walnuts. Remember that there are two potential timings of ethephon, based on different goals. - [Navel Orangeworm Considerations Before Harvest - 2017](https://www.sacvalleyorchards.com/almonds/insects-mites/navel-orangeworm-considerations-before-harvest/) - Navel orangeworm is the key pest in almond. Nut feeding by this pest directly reduces yield and grower income. For example, 1% damage* in a 2500 kernel lb/acre crop = 25 kernel lb/acre loss (and $62.5/acre at a price of $2.50/lb). Also, NOW damage is frequently contaminated with highly toxic fungus aflatoxin, which is carried - [Navel Orangeworm Considerations - 2018](https://www.sacvalleyorchards.com/almonds/navel-orangeworm-considerations-2018/) - Navel orangeworm (NOW) damage in the 2017 almond crop was painfully bad in many blocks in the Sacramento Valley. It cost some growers hundreds of dollars per acre, slowed crop processing (more money lost) and may be an issue in some international markets due to aflatoxin concerns. - [Ant Management is Especially Important in a Heavy Crop Year](https://www.sacvalleyorchards.com/almonds/insects-mites/ants-heavy-crop-year/) - Because the percentage of ant damage is related to how long the nuts remain on the orchard floor, planning for ant management this season is vital. The size of this year’s crop will likely translate into longer periods of almonds sitting on the orchard floor waiting for pick up – especially for growers that depend on contract harvesters. - [Navel Orangeworm Management Considerations - 2020](https://www.sacvalleyorchards.com/almonds/insects-mites/now-2020/) - Hull split and the pesticide application timing for navel orangeworm control on new crop nuts are fast approaching. Timing, coverage and pesticide selection, in that order, are critical to getting the best possible results from spray applications. - [Hull split Hull Rot Management](https://www.sacvalleyorchards.com/blog/almonds-blog/hull-split-hull-rot/) - Infections by Rhizopus stolonifera and Aspergillus niger occur after hull split because these are wound pathogens that require an opening to enter and infect the hull. The best, current approach to managing Rhizopus hull rot management includes three parts. The first two steps help to manage the environment, with respect to the disease triangle, while the latter seeks to control the pathogen. - [Walnut Trees in the Nursery Trade: Terminology, Propagation, Availability, & Pest Interactions](https://www.sacvalleyorchards.com/walnuts/orchard-development/walnut-trees-in-the-nursery-trade/) - Updated February, 2020. Originally posted June, 2016. Janine Hasey, Chuck Leslie, Wesley Hackett, Pat J. Brown, Andreas Westphal, Michael McKenry, Greg Browne, & Dan Kluepfel. Helpful terminology in understanding walnut plant material: Cultivar (cultivated variety) - A named group of plants within a cultivated species that is distinguished by a group of characteristics, e.g. refers - [Observations on Butte County Rootstock Trials](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/butte-county-rootstock-trials-2019/) - Over a dozen different rootstocks have been observed in various orchard situations with local growers in Butte County over the past twenty two years. The complete results of these trials can be found in past Annual Rootstock Project Reports to the Almond Board of California. The following article summarizes what the author believes are the most useful results and conclusions. - [Managing Walnut Orchards for Insect-eating Birds](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/insect-eating-birds/) - Codling moth are challenging to control during the growing season because the larvae burrow inside nuts to feed, keeping them safe from natural enemies and insecticides. However, during winter months, larvae are more vulnerable to predators, offering opportunities for biocontrol by natural enemies, including insectivorous birds. - [Leaf-out Problems in Pistachio and Walnut](https://www.sacvalleyorchards.com/photos-from-the-field/leaf-out-problems-pistachio-walnut/) - Since mid-April, many advisors up and down the Valley have been receiving calls about unusual leaf-out in pistachio and walnut. The Sacramento Valley has certainly been experiencing this, too. - [Update on Rootstocks for Prune Production - 2019](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/update-on-rootstocks-2019/) - Two rootstock experiments in grower orchards were planted in Northern California in 2011. One site in Butte County and a second in Yuba County. The two sites are evaluating the performance of Improved French on 14 rootstocks planted in replicated randomized trials. We previously reported in this newsletter on the results from this trial in 2015 and 2017 issues. Here, updated results are given. - [Hull Split Timing and Sprayer Practices for Best Pest Control Results](https://www.sacvalleyorchards.com/almonds/insects-mites/hull-split-timing-and-sprayer-practices/) - If you wait too long to put on the first hull split spray, it doesn’t matter if it’s done by air, ground or robot, what’s in the tank, how slow you drive or what spray volume you use – you are too late to get the best control possible and it will cost you in both lost crop and quality incentives. Once you get the timing right, you have to get excellent coverage when you spray or you will not get the best control possible and the best net return. - [Rootstock Trial for Boron Tolerance - 2019 Update](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/rootstock-boron-tolerance-2019/) - Excessive boron in soil or irrigation water is not widespread in the Central Valley, but where present, it can be a substantial obstacle to almond production. A rootstock trial in Yolo County was designed to find which almond rootstocks do better or worse under high boron conditions. What follows is a summary of findings to date. What follows is a summary of findings to date. - [Prune Rootstock Trial Performance - 2015](https://www.sacvalleyorchards.com/blog/prunes-blog/prune-rootstock-trial-performance/) - By: Rich Buchner, Franz Niederholzer, Katherine Jarvis-Shean, UCCE Farm Advisors, and Chuck Fleck, Sierra Gold Nursery. Roots are the unsung heroes of orchard plantings. They operate out of sight and are relatively difficult to ex-amine and characterize. So what do roots do? Roots: -Anchor trees to the soil -Take up water and essential mineral elements - [Observations from the Prune Rootstock Trial - 2017](https://www.sacvalleyorchards.com/blog/prunes-blog/preliminary-observations-for-new-prune-rootstocks/) - As soil treatment options become increasingly limited, more restrictive and less effective, the priority to identify a genetic solution to solve or reduce the replant issue is of increasing interest. One genetic solution is to find or develop rootstocks to help manage soil related problems. Also of interest are root and tree characteristics imparting canopy size control, good anchorage and little or no root suckering. In 2011, University of California Farm Advisors and campus based faculty designed and planted 3 large rootstock experiments to evaluate 29 prune rootstocks. - [Monterey and the Leafing Failure: What could be causing it?](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/monterey-leafing-failure-what-could-cause/) - Researchers have historically been unable to pin down a cause for leafing failure because it was a rare event, only being reported periodically in the last couple decades. The problem was noted periodically before 2000, but most recent reports were made by farm advisors of leafing failure symptoms in 2000, 2006, 2010, 2017, 2018, and 2020. - [PPE in short supply for farm work during the COVID-19 crisis](https://www.sacvalleyorchards.com/blog/ppe-during-covid/) - With increased demand for personal protective equipment, or PPE, to protect against COVID-19, agricultural professionals are facing shortages. But there is alternative PPE that agricultural professionals can use during the shortage. - [Non-Infectious Bud Failure Management](https://www.sacvalleyorchards.com/almonds/horticulture/non-infectious-bud-failure-management/) - It’s well known that non-infectious bud failure is a genetic disorder that occurs in many almond varieties in California. Nonpareil or any variety with Nonpareil parentage in its genetic background can be affected by the disorder, most notably Carmel. - [Monterey and the Leafing Failure - 2018](https://www.sacvalleyorchards.com/almonds/horticulture/monterey-and-the-leafing-failure/) - This spring, I received many calls regarding the failure of vegetative buds to push, particularly in the Monterey variety. Affected trees are characterized by an entire scaffold that failed to leaf out, even though trees bloomed as usual and, in some cases, set a crop (Figure 1 & 2). In many cases, if you cut - [Monterey and the Leafing Failure 2020: What are we seeing?](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/monterey-and-the-leafing-failure-2020-what-are-we-seeing/) - In 2018 Dani Lightle reported leafing failures in Monterey following several calls she investigated. In 2020, UC advisors, specialists, and professors are again receiving calls reporting leaf out issues in several almond varieties, but most notably in Monterey. - [Irrigation with Roots in Mind](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/irrigation-with-roots-in-mind/) - A key role of roots is the uptake of water and nutrients. Roots do not function well when exposed to too much water and will stop growing and eventually die in stagnant and/or saturated soil conditions. We consider how a better understanding of root biology can inform best irrigation practices. - [Navigating Irrigation Technology Overload](https://www.sacvalleyorchards.com/almonds/irrigation/navigating-irrigation-technology-overload/) - “Technology” has different meanings for different people (Figure 1). In irrigated agriculture we look towards technology to meet our changing needs and sustain our industry in the long run. However, with technology, “confusion” and a sense of overload can hinder our ability to learn and apply it. This article considers the abundance of irrigation technology and the challenges with its adoption. Some ideas are offered to cope with the sense of confusion and overload. - [Autumn 2018 Freeze Event a Year Later](https://www.sacvalleyorchards.com/blog/walnuts-blog/autumn-2018-freeze-event-a-year-later/) - An autumn freeze event in November 2018 caused widespread dieback in both young and mature walnut orchards in the Sacramento and northern San Joaquin Valleys. Following our initial diagnosis in April 2019 and our update on regrowth at the end of May 2019, we revisited several affected orchards at the end of the 2019 season, nearly a year after the freeze event. - [Walnut Blight Management](https://www.sacvalleyorchards.com/walnuts/diseases/walnut-blight-management/) - Walnut blight is caused by the bacterial pathogen Xanthomonas arboricola pv. juglandis (Xaj). This devastating bacterium can overwinter in between scales of healthy buds, “waiting” to be rain-splashed onto the developing flowers and leaves. - [Rootstock research needs your input](https://www.sacvalleyorchards.com/blog/walnuts-blog/rootstock-research-needs-your-input/) - Selecting the optimal walnut rootstock for your orchard is a critical decision. To better understand what rootstock characteristics growers need, these researchers are asking walnut growers to take a ten-minute rootstock survey. - [Pre-Season Airblast Sprayer Calibration](https://www.sacvalleyorchards.com/almonds/foliar-diseases/pre-season-airblast-sprayer-calibration/) - Prep your sprayer for bloom (blight) sprays. If you use stainless steel nozzles, toss out last year’s and buy new ones. If you are using ceramic nozzles, check them for wear. Ceramic nozzles do wear out, eventually. Once you are happy with your nozzles, check pump and system strainers as well as those at the nozzle. - [Emergency Registration Approved for Almond Bacterial Blast Material](https://www.sacvalleyorchards.com/almonds/foliar-diseases/emergency-registration-approved-for-almond-bacterial-blast-material/) - Bacterial blast, although thankfully not a problem every year (hopefully including 2020), can be tremendously damaging to almond yields. Because Sacramento Valley almond growers were significantly impacted by bacterial blast in two of the last three years, crop loss data from Sacramento Valley counties supported a Section 18 emergency request for the use of Kasugamycin on almonds. - [A Need for Winter Irrigation?](https://www.sacvalleyorchards.com/almonds/irrigation/a-need-for-winter-irrigation/) - Since mid-January the lack of rainfall has come to the forefront of our minds, and we have an updated precipitation picture as of late February 2020. - [Don't tie so close! Plus, other walnut staking considerations](https://www.sacvalleyorchards.com/photos-from-the-field/dont-tie-so-close-plus-other-walnut-staking-considerations/) - Seeing young walnut trees tied so tightly to a stake that they appear glued is not an unusual site. However, tying a young tree tightly to the stake can cause multiple problems. - [Pruning wound protection: How to reduce the impact of canker diseases](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/pruning-wound-protection/) - As we approach winter in the Sacramento Valley and almond trees enter dormancy, pruning becomes a top priority for many growers. Rain events are strongly correlated with the spread of fungal canker pathogens whose primary infection sites are pruning wounds. Results from sampling over 140 almond orchards found 21 different fungal pathogens associated with these canker diseases. While the pathogens differ in biology, there are common approaches to prevent infections. - [Northern Sacramento Valley ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2019-et-reports/northern-sacramento-valley-et-report/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [South Sacramento Valley ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2019-et-reports/south-sacramento-valley-et-report/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Postharvest irrigation in a dry autumn?](https://www.sacvalleyorchards.com/photos-from-the-field/postharvest-irrigation-in-a-dry-autumn/) - It is important to consider irrigation of perennial tree crops leading up to dormancy to foster carbohydrate storage in the trees and to guard against the occurrence of freezing temperatures in dry orchards putting them at more risk to cold injury. - [Sacramento Valley Post-Harvest Almond & Walnut IPM Workshop - Nov 22, Chico](https://www.sacvalleyorchards.com/blog/sacramento-valley-post-harvest-almond-walnut-ipm-workshop-nov-22-chico/) - Join a panel of your Sacramento Valley Area IPM and Farm Advisors to hear about the latest research updates, 2019 field observations, and discuss key production and pest management issues in almonds and walnuts as we wrap up the season and look toward 2020! - [Prune Rootstocks & Bacterial Canker Susceptibility](https://www.sacvalleyorchards.com/blog/prunes-blog/prune-rootstocks-bacterial-canker-susceptibility/) - Survival is the number one priority of a new orchard planting. Bacterial canker plagues many young prune orchards and rootstock selection can make a major impact on bacterial canker susceptibility. Learn which rootstocks have 100% survival in a UC prune rootstock trial at a high bacterial canker pressure site. - [Hull split timing differences by rootstock?](https://www.sacvalleyorchards.com/blog/almonds-blog/hull-split-timing-differences-by-rootstock/) - You’re certainly familiar with the differences in almond hull split and subsequent harvest timing between different varieties. A typical case of this can be observed with early splitting and harvest of Nonpareil relative to other later varieties. However, you may not often think about differences in hull split influenced by rootstock. - [Almond Variety Planting Trends](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/almond-variety-planting-trends/) - With the right varieties, a new almond orchard should be profitable for at least 20 years. Many decisions contribute to successfully meeting that target. One key decision is variety selection. Knowledge of the current and past variety planting trends of almonds in California may be helpful in this decision. - [Potassium management for sustained almond yields](https://www.sacvalleyorchards.com/almonds/horticulture/potassium-management-for-sustained-almond-yields/) - Adequate potassium is critical to sustained yields in an almond orchard. There are many approaches to providing almond trees with the potassium they need, depending on your local climate conditions, orchard infrastructure and budget. - [Yellowing/Collapsing Walnut Trees? Pt. 2 Yellowing Howard Problem](https://www.sacvalleyorchards.com/blog/walnuts-blog/yellowing-collapsing-walnut-trees-pt-2-yellowing-howard-problem/) - The yellowing Howard problem is one specific instance of waterlogging induced root death. Howard appears sensitive to problems following cool, wet springs. The key management solution to the yellowing Howard problem is irrigation management. - [Yellowing/Collapsing Walnut Trees? Pt. 1 Water Logging](https://www.sacvalleyorchards.com/blog/walnuts-blog/yellowing-collapsing-walnut-trees-pt-1-water-logging/) - A single yellowing walnut tree in an otherwise healthy orchard has been a frequent sighting when driving along the roadways of the Sacramento Valley this summer. These yellowing trees have also been common this summer. The most likely cause of this yellowing and tree collapse was waterlogging induced root death. - [Aerial Phytophthora or Bacterial Canker?](https://www.sacvalleyorchards.com/photos-from-the-field/aerial-phytophthora-or-bacterial-canker/) - Weekly "Photos from the Field" feature images taken while on farm calls. They reflect current conditions and questions that I am receiving from growers & PCAs. - [Crown Gall](https://www.sacvalleyorchards.com/blog/walnuts-blog/photos-from-the-field-crown-gall/) - Weekly "Photos from the Field" features images taken while on farm calls. They reflect current conditions and questions that I am receiving from growers & PCAs. - [Advisor Training in Kern County](https://www.sacvalleyorchards.com/blog/almonds-blog/photos-from-the-field-advisor-training-in-kern-county/) - Weekly "Photos from the Field" features images taken while on farm calls. They reflect current conditions and questions that I am receiving from growers & PCAs. This week highlights photos taken on our annual almond advisor training tour, held this year in Kern county. - [Funky Walnut Growth](https://www.sacvalleyorchards.com/blog/walnuts-blog/photos-from-the-field-funky-walnut-growth/) - Weekly "Photos from the Field" features images taken while on farm calls. They reflect current conditions and questions that I am receiving from growers & PCAs. - [Almond Boron Deficiency](https://www.sacvalleyorchards.com/photos-from-the-field/almond-boron-deficiency/) - Weekly "Photos from the Field" features images taken while on farm calls. They reflect current conditions and questions that I am receiving from growers & PCAs. - [When Gophers Attack](https://www.sacvalleyorchards.com/photos-from-the-field/photos-from-the-field-when-gophers-attack/) - This 4th leaf almond orchard had multiple trees collapse suddenly when temperatures warmed up. In some cases, the trees were isolated and surrounded by apparently healthy trees; in others, several trees down the row died almost simultaneously. - [Ant Mounds](https://www.sacvalleyorchards.com/photos-from-the-field/ant-mounds/) - Can you identify an ant by its mound? Of course, it's better to base IDs off of the ant specimen itself, but for the more entomophobic among you, ant mound ID may sound like a fantastic alternative. - [2,4-D Damage in Walnut](https://www.sacvalleyorchards.com/photos-from-the-field/photos-from-the-field-24-d-damage-in-walnut/) - I was called out in mid-July by a PCA to evaluate a single sick walnut tree. The tree was said to have unusual symptoms and be surrounded by completely healthy trees. Indeed, the tree was surrounded by healthy, uniform trees, while the single tree in question had multiple scaffolds with patches of dead leaves. - [What's that Caterpillar on my Weeds?](https://www.sacvalleyorchards.com/photos-from-the-field/whats-that-caterpillar-on-my-weeds/) - This week, I received several phone calls and photos from growers and PCAs in the area inquiring about large caterpillars being observed on weeds in their almond and walnut orchards. Is it going to eat your orchard? - [Walnut Orchards Not Leafing Out](https://www.sacvalleyorchards.com/photos-from-the-field/walnut-orchards-not-leafing-out/) - From the northern San Joaquin Valley to the northern Sacramento Valley, walnut growers are reporting a widespread and alarming issue of walnut trees not leafing out this spring. The initial hypothesis from researchers is that we are seeing frost damage from mid-November, however the symptoms on mature blocks are both more unusual and more severe than autumn freeze events in recent memory. - [Mesophyll Collapse](https://www.sacvalleyorchards.com/photos-from-the-field/mesophyll-collapse/) - We have been seeing walnut leaves showing browning (necrosis) on the leaf area between the veins in some orchards since about mid-May. Sometimes the leaves will then twist and defoliate in very severe situations. We call this problem mesophyll collapse and believe it is a physiological problem associated with sudden temperature changes. - [Spring Cankers in Prune](https://www.sacvalleyorchards.com/photos-from-the-field/spring-cankers-in-prune/) - In prunes, some years are bacterial canker years, while every year is a Cytospora year. Going into this year, we knew the wet/cold conditions could mean that we were headed into a bacterial canker year. However, diagnosing the dieback we are seeing this spring has brought some surprises. - [Howard Nut Drop](https://www.sacvalleyorchards.com/photos-from-the-field/howard-nut-drop/) - During about the second or third week in June, many Howard walnut trees experienced nut drop of perhaps as many as 100 nuts per tree, with many trees losing no more than 60 nuts per tree. These nuts were full size with the shell beginning to harden. Cutting open an immediately dropped nut, you could see darkening of the inside watery kernel material. Several possible causes are explored in this article. - [Training Young Walnut Trees: No Pruning/No Heading vs. Minimum Pruning Compared](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/training-young-walnut-trees-minimum-pruning-vs-no-pruning-compared/) - Training young walnut trees occurs in the first 1-6 years in the life of an orchard. Traditionally it has been done using a modified central leader with a minimum pruning style. Research conducted since 2004 investigating pruning versus non-pruning on young walnut tree growth and productivity has challenged that paradigm. - [Frequently Asked Questions about Weekly Crop ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/using-et-reports/frequently-asked-questions/) - Q1: Why are weekly crop ET rates reported as inches per week instead of gallons per tree per week or per day when drip emitters, microsprinklers, and minisprinklers are rated in gallons per hour or gallons per minute? We recognize the issue but need to report the weekly crop ET rates in inches per week - [Cover Crop Seed Selection](https://www.sacvalleyorchards.com/almonds/horticulture/cover-crop-seed-selection/) - There are plenty of benefits that can come from cover cropping in an almond orchard, including improved orchard access, improved water infiltration, encouraging native pollinizers and improved honeybee health. But all the options of species to plant can be overwhelming. Herein we’ll review how to pick a cover crop seed blend for a particular orchard. - [Almond Hull Rot – Cultural and Chemical Management](https://www.sacvalleyorchards.com/almonds/foliar-diseases/almond-hull-rot-cultural-and-chemical-management/) - Updated July 2019; Originally posted July 2016. Adapted from "Hull Rot Management" by Dani Lightle, UCCE Farm Advisor, Glenn, Butte and Tehama Counties, and Franz Niederholzer, UCCE Farm Advisor, Colusa, Sutter and Yuba Counties, originally published May 2018; and “Almond Hull Rot – Cultural and Chemical Management” by David Doll, UCCE Farm Advisor, Merced County, - [Almond Hull Rot Control - Irrigation Management](https://www.sacvalleyorchards.com/almonds/foliar-diseases/hull-rot-irrigation-management/) - Originally posted July 2018; Updated July 2019. Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties & Allan Fulton, UCCE Water Resources Advisor, Tehama, Glenn and Colusa Counties Hull rot can be a heartbreaker, appearing suddenly at harvest in orchards where growers and PCAs are trying to “do everything right”. Hull rot is a general term - [Cover Crops in Almonds: Research Updates](https://www.sacvalleyorchards.com/almonds/horticulture/cover-crops-in-almonds-research-updates/) - Dani Lightle, UCCE Orchards Advisor, Glenn, Butte & Tehama Cos.; Cynthia Creze, PhD Student, UC Davis; & Amélie Gaudin, Department of Plant Sciences, UC Davis Almond growers have indicated interest in the use of cover crops, but grower surveys indicate that lack of best management practices and concerns about expected returns continue to prevent wider - [The Many Possible Causes of “Gummy Nuts”](https://www.sacvalleyorchards.com/almonds/insects-mites/possible-causes-of-gummy-nuts/) - There are several biological factors and non-biological conditions that cause “gumming” in almonds. “Gummy nuts” may refer to different symptoms depending on which part of the fruit is affected. In this article, the term “hull gummosis” refers to the exudates (typically clear to amber in color) that are visible on the outside of the fruit. - [Hull Split Timing and Sprayer Practices for Best Pest Control Results](https://www.sacvalleyorchards.com/almonds/horticulture/hull-split-timing-sprayer-practices-for-best-results/) - Early hull split, when the hull begins to open at the suture, is a don’t-want-to-miss timing in almond production. The crack in the hull does two things: releases nut volatiles so the navel orangeworm (NOW) female can find the nut (and lay eggs), and gives wound pathogens like Rhizopus and Aspergillus an opening to infect - [Tighter Spacing and Greater Light Interception in Prunes](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/tighter-spacing-and-greater-light-interception-in-prunes/) - Luke Milliron, UCCE Farm Advisor, Butte, Tehama, and Glenn Counties; Franz Niederholzer, UCCE Farm Advisor, Colusa, and Sutter-Yuba Counties; Dani Lightle, UCCE Farm Advisor, Glenn, Butte, and Tehama Counties; Katherine Jarvis-Shean, UCCE Farm Advisor, Yolo, Solano, and Sacramento Counties Increased Canopy Volume -> Increased Light Interception -> Increased Yield Potential Many of California’s established prune - [Advisor Retirement](https://www.sacvalleyorchards.com/blog/advisor-retirement/) - I am retiring on July 1st after nearly 38 years working for UC Cooperative Extension and over 36 years as an Orchard and Environmental Horticulture (EH) Advisor in Sutter-Yuba Counties. What an honor to work with all of you growers, PCAs, and others in the Ag industry, and such a privilege to collaborate with so many talented UC colleagues solving challenging problems together. - [Maximizing walnut quality to improve value in a low-price year](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/maximizing-walnut-quality-to-improve-value-in-a-low-price-year/) - Elizabeth Fichtner, UCCE Farm Advisor, Tulare County; Carlos Cristosto, CE Specialist, Postharvest Physiology; Bruce Lampinen, CE Specialist, Plant Sciences The overall value of a walnut crop is based on yield and nut quality. Commodity prices are depressed, improving nut quality may be the determining factor influencing orchard profitability. Irrigation management is the single most important - [Integrated Pest Management Update - June 21, 2019](https://www.sacvalleyorchards.com/pest-reports/2019-pest-reports/ipm-updates-6-21-19/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Integrated Pest Management Update - May 30, 2019](https://www.sacvalleyorchards.com/pest-reports/2019-pest-reports/ipm-updates-5-30-19/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Integrated Pest Management Update - May 19, 2019](https://www.sacvalleyorchards.com/pest-reports/2019-pest-reports/ipm-updates-5-19-19/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Don’t get Caught out in a Perfect Storm](https://www.sacvalleyorchards.com/blog/prunes-blog/dont-get-caught-out-in-a-perfect-storm/) - California prune growers generally had good bloom in 2019 and bloom weather was also good. This should see an increase in cropload for many blocks for 2019, meaning that chances are higher for growing smaller fruit. Growers and PCAs are invited to attend a field day to demo cropload checking in Live Oak on Wednesday, May 8. - [It was a wet winter! How wet?](https://www.sacvalleyorchards.com/blog/it-was-a-wet-winter/) - Storms throughout the winter and into early spring, have resulted in localized flooding in the Sacramento Valley and left standing water or shallow perched water table in many orchards in the region. This update shows the extent of above-average rainfall in different parts of the Sacramento Valley in January through March. - [Prune Thinning Calculator](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/prune-thinning-calculator/) - Thinning should occur roughly around the same time as ‘reference date’, or the point at which 80-90% of the fruit have a visible endosperm. The endosperm, a clear gel-like glob, will be found in the seed on the blossom end of the prune and is solid enough to be removed with a knife point. Typically, - [Thinning Prunes](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/thinning-prunes/) - Will you need to thin prunes this year? In order to keep fruit from falling through the sizer, you need to do some legwork and estimate your fruit set. If needed, thinning should occur roughly around the same time as ‘reference date’, or the point at which 80-90% of the fruit have a visible endosperm. - [Brown Rot Blossom and Twig Blight](https://www.sacvalleyorchards.com/prunes/brown-rot-blossom-and-twig-blight/) - Brown rot blossom/twig blight is the most important blossom disease of prune in California. Warm and wet bloom periods make for high pressure disease years - keep reading to ensure the program you are using adequately protects your orchard. - [Bee Hours and Almond Pollination](https://www.sacvalleyorchards.com/blog/almonds-blog/bee-hours-and-almond-pollination/) - Almond growers have been a-buzz on the topic of bee hours. The concept of a bee hour was designed as a proxy for the amount of good bee foraging weather that occurred during almond bloom. Does low bee hour accumulation mean our 2019 crop is sunk? - [Advanced SWP Interpretation in Prune](https://www.sacvalleyorchards.com/manuals/stem-water-potential/advanced-swp-interpretation-in-prune/) - Allan Fulton, UCCE Water Resources Advisor, Tehama, Shasta, Glenn and Colusa Counties; and Luke Milliron, UCCE Orchards Advisor, Butte, Tehama and Glenn Counties. Advanced guidelines for prune are provided in Table 1 (below). These guidelines consider the actual orchard measurements and normalized measurements after referencing baseline SWP (i.e. bars +/- Table 2 baseline, end of - [Advanced SWP Interpretation in Almond](https://www.sacvalleyorchards.com/manuals/stem-water-potential/advanced-swp-interpretation-in-almond/) - Allan Fulton, UCCE Water Resources Advisor, Tehama, Shasta, Glenn and Colusa Counties; and Luke Milliron, UCCE Orchards Advisor, Butte, Tehama and Glenn Counties. Advanced guidelines for almond are provided in Table 1 (below). These guidelines consider the actual orchard measurements and normalized measurements after referencing baseline SWP (i.e. bars +/- Table 2 baseline, end of - [Advanced SWP Interpretation in Walnut](https://www.sacvalleyorchards.com/manuals/stem-water-potential/pressure-chamber-advanced-interpretation-in-walnut/) - Allan Fulton, UCCE Water Resources Advisor, Tehama, Shasta, Glenn and Colusa Counties; and Luke Milliron, UCCE Orchards Advisor, Butte, Tehama and Glenn Counties. Advanced guidelines for walnut are provided in Table 1 (below). These guidelines consider the actual orchard measurements and normalized measurements after referencing baseline SWP (i.e. bars +/- Table 2 baseline, end of - [Using Baseline SWP for Precise Interpretation](https://www.sacvalleyorchards.com/manuals/stem-water-potential/using-baseline-swp-for-precise-interpretation/) - Allan Fulton, UCCE Water Resources Advisor, Tehama, Shasta, Glenn and Colusa Counties; and Luke Milliron, UCCE Orchards Advisor, Butte, Tehama and Glenn Counties. Experienced Pressure Chambers Users As a person gains experience with using the pressure chamber, they become more familiar with some complexities of measuring and interpreting orchard water status. While the direct measurement - [Interpretation for the Beginner](https://www.sacvalleyorchards.com/manuals/stem-water-potential/interpretation-for-the-beginner/) - Allan Fulton, UCCE Water Resources Advisor, Tehama, Shasta, Glenn and Colusa Counties; and Luke Milliron, UCCE Orchards Advisor, Butte, Tehama and Glenn Counties. SWP Levels Vary Among Orchard Crops What do the pressure chamber measurements mean? The range in stem water potential (SWP) stress levels vary substantially between crops. This post highlights general guidelines for - [Walnut Blight Bud Sampling](https://www.sacvalleyorchards.com/walnuts/diseases/walnut-blight-bud-sampling/) - Depending upon weather conditions, pathogen population and walnut variety, walnut blight caused by the bacterium Xanthomonas arboricola pv. juglandis (Xaj) can cause significant crop loss. Blight damage in later leafing varieties largely depends on how high the overwintering population of inoculum built up on bud scales. Initial inoculum in dormant buds can be used to predict subsequent disease severity. - [Update on Heart Rot in Prunes](https://www.sacvalleyorchards.com/prunes/diseases-prunes/update-on-heart-rot-in-prunes/) - Katrina Von Burg and Bob Johnson, Rizzo Lab, Department of Plant Pathology, UC Davis Prune orchard surveys throughout the Sacramento Valley in 2016 and 2017 found significant presence of the wood decay fungus Phellinus tuberculosus. Phellinus causes decay in the heartwood of trees and often goes undetected until fruiting bodies appear (Figure 1) or branches - [Irrigation Season Considerations](https://www.sacvalleyorchards.com/prunes/irrigation-prunes/irrigation-season-considerations/) - Allan Fulton, UCCE Water Resources Advisor, Tehama, Glenn, and Colusa Counties; Luke Milliron, UCCE Farm Advisor, Butte, Glenn and Tehama Counties & Franz Niederholzer, UCCE Farm Advisor, Colusa and Sutter/Yuba Counties Tree and crop development progresses through multiple phases during the season (Figure 1). They include expansive tree growth and fruit development, floral and vegetative bud development - [Tracking Winter Irrigation Needs](https://www.sacvalleyorchards.com/blog/tracking-winter-irrigation-needs/) - Allan Fulton, UCCE Irrigation and Water Resources Advisor, Tehama, Colusa, Glenn & Shasta Counties; Luke Milliron, UCCE Orchards Advisor, Butte, Tehama & Glenn Counties The dormant winter season is a time when evapotranspiration (ET) is low and it is an opportunity to refill the soil profile in your orchards prior to the next season. Some benefits - [Wood Decay in Almond](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/wood-decay-in-almond/) - Luke Milliron, UCCE Farm Advisor, Butte, Tehama, and Glenn Counties; Bob Johnson, PhD Candidate Rizzo Lab, UC Davis Plant Pathology In March of 1995 a four-day storm with winds reaching nearly 65 mph and a deluge of six-inches resulted in an estimated 15,000 acres of downed almond trees in California, with losses at the time - [Protecting Honey Bees at Bloom](https://www.sacvalleyorchards.com/almonds/pollination/protecting-honey-bees-at-bloom/) - It’s time for your annual pollinator safety reminder! Everyone should know to avoid insecticides when honey bee colonies are in the orchard. The only insect pest that could potentially be considered for treatment when honey bees are in the orchard is peach twig borer (PTB). Applications of Bacillus thuringiensis (Bt) during this time have been - [Weed Management Considerations When Replanting Trees in an Established Orchard](https://www.sacvalleyorchards.com/prunes/weed-control-prunes/weed-management-considerations-when-replanting-trees/) - Drew Wolter, UCCE Junior Specialist Horticulture Intern & M.S Student, University of California, Davis, Department of Weed Science Weeds impact orchard productivity and health by competing with young trees for water, light, and nutrients, and may act as hosts for a variety of pests. The primary objective of a successful weed management program is to optimize - [Bloom Disease Treatments and Honey Bee Safety](https://www.sacvalleyorchards.com/prunes/diseases-prunes/bloom-disease-treatments-honey-bee-safety/) - Emily Symmes, UC IPM Advisor, Sacramento Valley and Franz Niederholzer, UC Farm Advisor, Colusa, Sutter & Yuba Counties. Disease management during prune bloom using fungicide sprays is critical to setting a successful crop, particularly in years with wet bloom conditions that drive pathogen development and spread. Of particular concern, and often treated during bloom, are brown rot and scab. Just as essential as disease management to producing - [Trends in World Prune Markets - and What They Mean for California Grower Practices](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/trends-in-world-prune-markets/) - Bigger crops often follow small to medium crops. [The 2018 prune crop looks to be 25-30% off the 2017 crop.] California should expect a larger prune crop in 2019 compared to 2018, weather allowing. While nobody can be certain what the crop will be in ’19, given past history and world production trends, it’s not - [Cytospora Cankers](https://www.sacvalleyorchards.com/prunes/cytospora-cankers/) - Updated October 2018; Originally posted May 2016 Luke Milliron, UCCE Orchard Systems Farm Advisor, Butte, Tehama, and Glenn Counties; Franz Niederholzer, UCCE Farm Advisor in Colusa and Sutter/Yuba Counties; Themis Michailides, UC Davis Plant Pathologist Cytospora is a major pest of prune trees, killing bearing wood, reducing yield potential and even killing trees. It is a fungal - [Brown Marmorated Stink Bug - Keep an Eye Out for Potential Damage](https://www.sacvalleyorchards.com/almonds/brown-marmorated-stink-bug-keep-an-eye-out-for-potential-damage/) - Dr. Jhalendra Rijal, Area IPM Advisor-Northern San Joaquin Valley, UCCE Statewide IPM Program There’s a new pest to keep an eye out for in almond orchards: brown marmorated stink bug (BMSB), Halyomorpha halys. BMSB has been found in urban areas in 16 counties, but has only recently been documented in California orchards - Stanislaus County - [Impacts and Recovery on Walnuts from 2017 Flooding](https://www.sacvalleyorchards.com/walnuts/impacts-and-recovery-on-walnuts-from-2017-flooding/) - Janine Hasey, UCCE Farm Advisor, Sutter/Yuba/Colusa Counties, Greg Browne, USDA Plant Pathologist, UC Davis, Astrid Volder, Plant Sciences, UC Davis and Bruce Lampinen, UCCE Walnut Specialist, UC Davis 2017 brought unprecedented high and fluctuating water flows in the Sacramento and Feather Rivers, damaging orchards from direct flooding and indirectly via under-levee seepage. Many trees had a long exposure - [Almond Bloom Diseases](https://www.sacvalleyorchards.com/almonds/almond-bloom-diseases/) - Almond bloom diseases require specific conditions for infection – susceptible tissue, moisture, conducive temperatures – and these are often all present during bloom. Appropriate material choice, application timings and coverage are critical to minimize losses. Keep reading for susceptibility and treatment information for the primary spring diseases in almond production. - [Cost and Expense Considerations in a Lean Price Year](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/considerations-in-a-lean-price-year/) - Since last summer, coffee shop talk has been centered on the low price of walnuts. We all hope to see improvement in pricing soon. Even if prices increase, there are cultural and pest management options to improving your profit margin. We will have one quarterly article in 2019 that will focus on labor and cost - [SoilWeb Workaround](https://www.sacvalleyorchards.com/uncategorized/soilweb-workaround/) - Adapted by Luke Milliron, UCCE Orchard Systems Farm Advisor, Butte, Tehama, and Glenn Cos., Dani Lightle, UCCE Orchard Systems Farm Advisor, Glenn, Butte, and Tehama Cos., Toby O’Geen, UCCE Soil Resource Specialist, UC Davis Did you enjoy the popular UC Davis SoilWeb mobile application? Out in the field, this app enabled you to determine critical - [Weed Management For Young Orchards](https://www.sacvalleyorchards.com/manuals/young-orchard-handbook/weed-management-for-young-orchards/) - KATHERINE JARVIS-SHEAN & BRAD HANSON Weeds in young orchards compete with trees for orchard resources – sunlight, water and nutrients, setting back growth and yield. Weeds can also create cover for vertebrate pests which can then damage tree trunks (Figure 1) and irrigation systems. For these reasons, weed control is important for young orchards. There - [Early Walnut Tree Training: How to Handle Different Nursery Products](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/walnut-tree-training-different-nursery-products/) - Updated 10/25/18; Originally posted July 2018. Janine Hasey, UCCE Tree Crops Advisor Sutter/ Yuba/ Colusa Counties; Bruce Lampinen, UCCE Walnut Specialist, UC Davis; Katherine Jarvis-Shean, UCCE Orchard Advisor Sacramento, Solano & Yolo Cos. Early walnut tree training begins at the time of planting either a rootstock or a “finished tree” (grafted or budded with the English variety) - [Preparing for an early freeze](https://www.sacvalleyorchards.com/blog/walnuts-blog/preparing-for-an-early-freeze/) - Fully dormant walnut trees are a relatively frost tolerant crop. Fully dormant mature trees can tolerate temperatures to the low 20’s (°F) or below. However, if the first one or two freeze events have lows down to around 28° F, damage will likely ensue. - [Planting a Cover Crop](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/planting-a-cover-crop/) - Adapted from the article “Planting a successful annual reseeding cover crop” by Janine Hasey, UCCE Farm Advisor, Sutter, Yuba, Colusa Counties and Mark Cady, Community Alliance with Family Farmers in the August 2008 Sacramento Valley Walnut News. Updated October 2018. Three cover crop systems used in walnut orchards are winter green manure crops that are - [Current South Sacramento Valley ET Report - October 19, 2018](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/current-south-sacramento-valley-et-report/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Current Northern Sacramento Valley ET Report - October 19, 2018](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/northern-sacramento-valley-et-report-current/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Pruning with Bot Infections in Mind](https://www.sacvalleyorchards.com/walnuts/diseases/pruning-with-bot-infections-in-mind/) - In research conducted by Themis Michailides, winter pruning (February) resulted in higher infection rates than fall pruning (October). - [Boron Deficiency](https://www.sacvalleyorchards.com/almonds/horticulture/boron-deficiency/) - Boron is a weird nutrient in orchard crops, particularly in California. It’s needed in very small amounts, and some crops, like almonds, do not tolerate soil levels much above 1 ppm. To complicate things, boron tends to be deficient in some parts of the valley. - [Advances in Walnut Production Short Course - Registration Opens September 4th](https://www.sacvalleyorchards.com/blog/walnuts-blog/walnut-production-short-course-registration-opens-september4/) - Plan to join us for this integrated orchard management short course featuring UC faculty, Cooperative Extension specialists and farm advisors, and USDA researchers who will provide an in-depth, comprehensive study of all phases of walnut culture and production. Registration for California residents opens September 4th. - [Good Pressure Chamber Field Measurement Technique](https://www.sacvalleyorchards.com/manuals/stem-water-potential/good-pressure-chamber-technique/) - Consistent technique helps improve the accuracy of stem water potential (SWP) measurements. Keep reading for tips on bagging, measuring, and properly determining the SWP endpoint. - [Purchasing a Pressure Chamber and Preparing to Monitor](https://www.sacvalleyorchards.com/manuals/stem-water-potential/purchasing-pressure-chamber-preparing-to-monitor/) - Continue to brush up on your pressure chamber technique with tips on selecting leaves for SWP measurement, weather conditions, and other FAQs. - [Harvest Damage Evaluation for Almonds](https://www.sacvalleyorchards.com/almonds/insects-mites/harvest-samples-for-almond-crop/) - The beginning of almond harvest is upon us in the Sacramento Valley, and while the bulk of the in-season pest management decisions are behind us for 2018, now is the time for a key activity in your year-round IPM Program – harvest samples. - [Basic Stem Water Potential Measurement - In Concept and In the Field](https://www.sacvalleyorchards.com/manuals/stem-water-potential/basic-swp-measurement/) - Stem water potential is a direct measure of water tension (negative pressure) within the plant. Continue reading to learn more about the basic concept of stem water potential and measurement in the field. - [Previous IPM Updates - July 13, 2018](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/previous-ipm-updates-july13-2018-2/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Integrated Pest Management Update - August 7, 2018](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/ipm-update/) - These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. - [Advances in On-Farm Water Management](https://www.sacvalleyorchards.com/blog/advances-in-on-farm-water-management/) - Irrigated agriculture acreage in the northern Sacramento Valley has grown substantially over the past decade, with gains largely driven by new orchard plantings. Despite these substantial gains in irrigated agriculture, actual water demand has remained relatively stable. This video showcases many irrigation management technologies on-display at a walnut irrigation field day conducted in June 2018. - [Prune Harvest Timing](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/prune-harvest-timing/) - Harvest can be a nerve-wracking time in the prune business. The finish-line – when the entire crop is in the bins – may be in sight, but there are still tough decisions to be made that influence your bottom-line. One of the most important decisions to be made is when to start harvesting. - [July Leaf Sampling: A Critical Task in Prune Production](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/july-leaf-sampling-a-critical-task-in-prune-production/) - As the bulk of your prune fertility program for the season comes to an end, it’s time to get the report card on how you did. Published July critical values established for prune by UC researchers can help guide you in your fertilization practice. Leaf analysis results help keep an orchard between excess and deficiency, which means the most efficient use of your fertilizer dollar. - [School is Out & Grades are Coming In: Almond July Leaf Analysis](https://www.sacvalleyorchards.com/almonds/horticulture/july-leaf-analysis/) - As the bulk of your almond fertility program for the season comes to an end, it’s time to get the report card on how you did. Published July critical values established for almond by UC researchers can help guide you in your fertilization practice. - [Previous IPM Updates - July 6, 2018](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/previous-ipm-updates-july6-2018-2/) - University of California Sacramento Valley Integrated Pest Management Update Report date: July 6, 2018 The most current report is available here. Disclaimer: These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. They are not intended to replace or supersede site-specific data on pest activity, abundance, and environmental conditions - [Previous IPM Updates - May 25, 2018](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/previous-ipm-updates-may-2018/) - University of California Sacramento Valley Integrated Pest Management Update Report date: May 25, 2018 The most current report is available here. Disclaimer: These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. They are not intended to replace or supersede site-specific data on pest activity, abundance, and environmental conditions - [Previous IPM Updates - June 9, 2018](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/previous-ipm-updates-june9-2018/) - University of California Sacramento Valley Integrated Pest Management Update Report date: June 9, 2018 The most current report is available here. Disclaimer: These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. They are not intended to replace or supersede site-specific data on pest activity, abundance, and environmental conditions - [Previous IPM Updates - June 28, 2018](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/previous-ipm-updates-june28-2018/) - University of California Sacramento Valley Integrated Pest Management Update Report date: June 28, 2018 The most current report is available here. Disclaimer: These updates are provided as reference information for Sacramento Valley orchard pest and natural enemy activity. They are not intended to replace or supersede site-specific data on pest activity, abundance, and environmental conditions - [New Podcast: "Growing the Valley"](https://www.sacvalleyorchards.com/blog/new-podcast-growing-the-valley/) - A new UC Cooperative Extension podcast that focuses on growing orchard crops in the San Joaquin and Sacramento valleys is now available. - [Blue Prune Drop](https://www.sacvalleyorchards.com/prunes/blue-prune-drop/) - Prune growers should be aware that current weather conditions favor development of blue prune and an associated leaf scorch. - [Leaf Symptoms of Overwatered Walnut Trees](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/leaf-symptoms-overwatered-walnuts/) - These photos show various symptoms observed on trees that were intentionally over-irrigated throughout the season. - [It's That Season Again: Growers Are Being Asked to Buy Products](https://www.sacvalleyorchards.com/blog/its-that-season-growers-asked-to-buy/) - Growers are faced with an ever-changing list of commercial “tools”, each with the promise of providing some advantage to the farmer. With the large number of new products available, and the number of salespeople promoting them, it is often difficult for growers to distinguish between products likely to provide real benefit, and those that may actually reduce the profitability of the farm. When approached with a new product or technology it is obligatory to challenge claims with the following questions: - [June Hull Rot Reminder](https://www.sacvalleyorchards.com/blog/almonds-blog/june-hull-rot-reminder/) - Hull rot infections can cost growers a lot of money; money in lost crop this year, money in more sanitation costs this winter, and money in lost spurs and shoots for future crops. There are two disease organisms responsible for hull rot damage. The first is Monilinia (brown rot), which infects the hull just prior to hull split in early to mid-June. - [Points to Consider in Prevention of Crown Gall](https://www.sacvalleyorchards.com/walnuts/diseases/preventing-crown-gall/) - The Paradox hybrids (Juglans hindsii x Juglans regia) commonly used as walnut rootstocks are highly susceptible to Crown Gall caused by the common soil-borne bacterium Agrobacterium tumefaciens. Here we present information from our quest to develop a robust comprehensive approach to crown gall prevention. - [Winter Chill](https://www.sacvalleyorchards.com/prunes/winter-chill/) - Adapted from the articles “Chill model comparison – Why two models judged last winter very differently” by Katherine Jarvis-Shean, UCCE Farm Advisor Sacramento, Solano and Yolo Counties and “Low Chill Winter?” by Franz Niederholzer, UC Farm Advisor, Colusa/Sutter/Yuba Counties in the Sacramento Valley Prune News, June and April 2014, respectively. Dormancy is a process by - [Avoiding Freeze Damage](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/avoiding-freeze-damage/) - Adapted from the article “How to Avoid Freeze Damage in Young Walnut Trees” by Katherine Jarvis-Shean, UCCE Farm Advisor Sacramento, Solano and Yolo Counties in the September 2014 Sacramento Valley Walnut News. It’s tempting to push young tree growth as long as possible in the fall, but that’s risky. In severe cases of freeze damage, - [Botryosphaeria Canker & Blight](https://www.sacvalleyorchards.com/walnuts/diseases/botryosphaeria-canker-blight/) - Botryosphaeria (Bot) canker and blight of walnut continued to be a problem so be alert to new infections from this spring and summer. Read on for symptoms and cultural practices for bot management. - [Post-Harvest Nut Crop IPM Meeting - November 2nd](https://www.sacvalleyorchards.com/blog/walnuts-blog/post-harvest-nut-crop-ipm-meeting-november-2nd/) - I am hosting a UC-sponsored post-harvest nut crop IPM meeting (focusing on almonds and walnuts) next Wednesday, November 2, 8am – noon. Read the full post or check the event calendar for more information. - [Counting Winter Chill](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/counting-winter-chill/) - The last few years have been highly variable in winter chill accumulation and spring bloom and leaf-out behavior. What’s driving this behavior? What can we expect this year? And how can one track and interpret chill accumulation? - [Potassium Nutrition - Maintaining Optimal Levels](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/potassium-nutrition-maintaining-optimal-levels/) - Adapted from: "Potassium Nutrition - Maintaining Optimum Levels by Replacing What You've Lost" by Katherine Jarvis-Shean. Originally published in Sacramento Valley Prune News, Fall 2014. Fall is an excellent time to manage the potassium (K) needs of prune trees. Assessment of your trees’ nutrient needs should take into account July leaf sample results, visual symptoms, - [Yellow Monterey Almond Trees](https://www.sacvalleyorchards.com/almonds/irrigation/update-on-yellow-monterey-almond-trees/) - Farm Advisors and PCAs have fielded calls this season concerning Monterey on Krymsk 86 or Rootpac-R showing unique foliar symptoms – yellowing, rolling leaves with marginal necrosis and poor growth. Most of the trees show these symptoms in the second leaf, but in some situations, first and third leaf trees are also affected. - [Previous Southern Sacramento Valley ET Reports - April 2018](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/previous-southern-sacramento-valley-april/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Previous Northern Sacramento Valley ET Reports - April 2018](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/previous-northern-sacramento-valley-april/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Previous Northern Sacramento Valley ET Reports - March 2018](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/previous-northern-sacramento-valley-march/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Previous Southern Sacramento Valley ET Reports - March 2018](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/previous-southern-sacramento-valley-march-2/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Do You Want A New Tool for Vole Management?](https://www.sacvalleyorchards.com/blog/do-you-want-a-new-tool-for-vole-management/) - Recent research has shown we may have a new tool to protect trees and vines from vole damage. However, this product is not currently registered for such a use. We need your response to know whether there’s enough interest in a new way to control vole damage to warrant seeking registration. - [What to Do this Spring for Flood Damaged Trees](https://www.sacvalleyorchards.com/walnuts/flooding/what-to-do-flood-damaged-trees/) - 2017 brought us unprecedented high and fluctuating water flows in the Sacramento and Feather Rivers, damaging orchards from direct flooding and indirectly via under-levee seepage. Many trees had a long exposure to waterlogged conditions through the winter and spring. This article discusses strategies for minimizing losses in 2018 in flood-impacted orchards. - [End of 2017 Season Flooded Orchard Damage Update](https://www.sacvalleyorchards.com/walnuts/flooding/end-of-season-flooded-orchard-damage-update/) - This article briefly reviews our observations since early June in orchards either directly flooded in the river bottoms or those indirectly flooded with standing water for months via under-levee seepage. - [2017 Research Results on Flood Damaged Trees](https://www.sacvalleyorchards.com/walnuts/flooding/2017-research-results-flood-damaged-trees/) - 2017 brought us unprecedented high and fluctuating water flows in the Sacramento and Feather Rivers, damaging orchards from direct flooding and indirectly via under-levee seepage. Many trees had a long exposure to waterlogged conditions through the winter and spring. This article details our observations and research on tree survival, disease, and recovery. - [Heat at Bloom](https://www.sacvalleyorchards.com/prunes/bloom/heat-at-bloom/) - Adapted from the articles “Heat at Bloom Update” by Franz Niederholzer, UC Farm Advisor, Colusa/Sutter/Yuba Counties and “High Temperatures at Bloom Reduce Fruit Set” by Carolyn DeBuse, UC Farm Advisor, Solano/Yolo Counties and Franz Niederholzer, UC Farm Advisor, Sutter/Yuba Counties in the Sacramento Valley Prune News, February 2015 and February 2011, respectively. Excessive heat, sustained - [Changing Bloom Timing with Dormant Oil](https://www.sacvalleyorchards.com/prunes/bloom/changing-bloom-timing-with-dormant-oil/) - Adapted from the article “Using a high oil rate before bloom: Why do it?” by Franz Niederholzer, UC Farm Advisor, Colusa/Sutter/Yuba Counties in the October 2010 Sacramento Valley Prune News A high rate of horticultural oil in a dormant spray can give significant benefits to prune growers. However, a high rate of oil can cost - [Frost Protection](https://www.sacvalleyorchards.com/prunes/bloom/frost-protection/) - Adapted from the article “Frost Protection” by Joe Connell, UC Farm Advisor, Butte County in the February 2011 Sacramento Valley Prune News Mild, radiation frosts occur on still, clear nights, often with the development of a strong inversion. Under these conditions frost protection can be provided by running water. Advection frosts are more severe and - [Bad Bloom Weather Options](https://www.sacvalleyorchards.com/prunes/bloom/bad-bloom-weather-options/) - Extreme weather at bloom can have damaging short and long term effect on prune growers in California and the entire California industry. Excessive heat (2004, 2005, 2007 and 2014) or prolonged cool, wet weather (2016) can dramatically reduce prune production. These losses harm growers’ bottom line as well as the local economy, and force the - [When is Peach Twig Borer a Concern?](https://www.sacvalleyorchards.com/almonds/insects-mites/when-is-peach-twig-borer-a-concern/) - Peach twig borer (PTB) larvae damage new shoots and, if the timing of their generations is just right, can feed on almond kernels at hullsplit causing shallow surface groves on the kernel. Oriental fruit moth (OFM) damage looks similar and its best to monitor both pests with pheromone traps to determine if either of them have the potential for nut damage. - [Interplanted Orchard Hazards](https://www.sacvalleyorchards.com/prunes/diseases-prunes/interplanted-orchard-hazards/) - Interplanting existing prune orchards where established trees don’t fill their space is a long accepted practice to increase grower income while limiting costs compared to complete orchard removal and replanting. This is often done in older orchards either by interplanting down the existing tree row or changing the direction of the tree rows 45o and - [Steps for Successful Nut Set](https://www.sacvalleyorchards.com/almonds/pollination/successful-nut-set/) - Predicting nut set in any given year is often a bit difficult. A review of the many steps involved in successful nut set may provide a better understanding of just what went wrong (or right) for different varieties across the region at bloom. Anthers (see Fig. 1 below) open as relative humidity drops in the - [Bacterial Spot in Butte County - First Report](https://www.sacvalleyorchards.com/blog/almonds-blog/first-report-of-bacterial-spot-in-butte-county/) - While the disease bacterial spot has been identified in California since 2013, it was previously known only to occur in the northern San Joaquin Valley and as far north as Arbuckle. However, I was recently called out to a symptomatic orchard in Butte county and confirmed that bacterial spot was present. - [Bacterial Blast - Relationship between Varieties and Symptoms during 2017 Bloom](https://www.sacvalleyorchards.com/almonds/foliar-diseases/relationship-between-varieties-and-bacterial-blast-during-bloom-2017/) - Bacterial blast doesn’t occur every year, so when there are a large number of orchards affected, it is natural to want to look for patterns in the occurrence and severity. One of the orchards affected in 2017 was the Regional Almond Variety Trial at the Chico State University Farm. This setting gives us a controlled - [Verticillium Wilt](https://www.sacvalleyorchards.com/almonds/verticillium-wilt/) - Adapted from the articule “Verticillium wilt in almonds” by Carolyn DeBuse- former Farm Advisor Solano and Yolo Counties in the July 2010 Sacramento Valley Almond News. Verticillium wilt symptoms show up in orchards in the late spring when the weather changes from cool to hot. The most visual symptom is dry yellow/brown leaves still hanging - [Phytophthora Crown Rot & Pruning Wound Cankers](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/phytophthora-crown-rot-pruning-wound-cankers/) - Adapted from the article “Crown rot or pruning wound cankers” by Joseph Connell, UCCE Farm Advisor, Butte County in the April 2013 Sacramento Valley Almond News. Almond pruning wound cankers can become a problem when recent pruning cuts are followed fairly closely by heavy extended rainfall that spreads fungus spores and creates conditions conducive to - [El Niño rains and pruning don’t mix!](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/el-nino-rains-and-pruning-dont-mix/) - Adapted from the article "El Niño Rains And Pruning Don't Mix" by Luke Milliron, UCCE Horticulture Intern, Colusa, Sutter, Yuba and San Joaquin Cos. Franz Niederholzer, UC Farm Advisor, Colusa, Sutter and Yuba Cos. Joseph Connell, UCCE Farm Advisor Emeritus, Butte County in January 2016 Sacramento Valley Almond News. Farming is a tough enough business. - [Why was rust an issue in 2016?](https://www.sacvalleyorchards.com/blog/almonds-blog/why-is-rust-an-issue-in-2016/) - High levels of rust infection can be found in some orchards around the region. Severe rust infections can cause premature defoliation, reducing almond or peach yield next year and increasing the risk of scaffold and branch bark sunburn in prunes in the late summer and fall. Why was 2016 a bad rust year and not 2015? - [Waterlogged Orchards & Phytophthora](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/waterlogged-orchards/) - A wet winter is when having an orchard planted on a deep, well-drained soil, or planting on berms, islands, or mounds can pay off. Some orchards on soils that are not well-drained or have been flooded can face difficulties when their root zones are saturated. Orchards planted in low areas or on heavy textured soils - [How is Band Canker Infecting Young Trees?](https://www.sacvalleyorchards.com/almonds/how-is-band-canker-infecting-young-trees/) - Band canker has been an increasing problem in young almond orchards in recent years. Some hot spot areas have suffered high damage and occasionally required the replanting of an entire pollenizer variety. Symptomatic trees have gumming on the trunk. In the first year of infection, gumming may show as a ring or band around the trunk (hence its’ common name). Keep reading for the latest research results. - [Replanting into Nematode-Infested Soils](https://www.sacvalleyorchards.com/walnuts/orchard-development/replanting-into-nematode-infested-soils/) - Adapted from the article “Best Management of Replant Alternative Fumigants” by Carolyn DeBuse, Former UCCE Farm Advisor, Solano, Yolo Counties and Michael McKenry, Extension Nematologist Emeritus and “Orchard removal and site preparation for walnut planting” by Joseph Connell, UCCE Farm Advisor Emeritus, Butte County in the October 2012 Sacramento Valley Walnut News. Replanting walnuts into - [Tree Spacing](https://www.sacvalleyorchards.com/walnuts/orchard-development/tree-spacing/) - Adapted from the articles “Spacing Walnuts for Optimum Light Interception and Production” by Bruce Lampinen, Walnut and Almond Specialist, UC Davis and Janine Hasey, UCCE Farm Advisor, Sutter, Yuba, Colusa Counties; and “Perspective on trends in orchard spacing, pruning and potential disease” by Joseph Connell, UCCE Farm Advisor Emeritus, Butte County in the Sacramento Valley - [Orchard Soil Preparation](https://www.sacvalleyorchards.com/walnuts/orchard-development/orchard-soil-preparation/) - Adapted from the article “Site preparation for walnut planting”, by Bill Krueger UCCE Farm Advisor Emeritus, Glenn County in the August 2008 Sacramento Valley Walnut News. Preparation for planting a new walnut orchard should start with a soil evaluation. Walnuts have traditionally been planted on class one soils, the deepest most uniform well drained soils. - [Planting Potted Clonal Rootstock](https://www.sacvalleyorchards.com/walnuts/orchard-development/planting-potted-clonal-rootstock/) - Adapted from the article “Guidelines for Handling Potted Walnut Clonal Rootstock Plants” Janine Hasey, UCCE Farm Advisor Sutter, Yuba, Colusa Counties in the March 2013 Sacramento Valley Walnut News Clonal Paradox rootstocks are micro-propagated in a lab and then potted in a soilless potting medium. Because they are clones, they have the same genetic constitution. - [Planting Bareroot Trees](https://www.sacvalleyorchards.com/walnuts/orchard-development/planting-bareroot-trees/) - Adapted from the article “Guidelines for handling and planting bareroot walnut nursery trees” by Carolyn DeBuse, Former UCCE Farm Advisor, Solano and Yolo Counties and Bill Krueger, UCCE Farm Advisor Emeritus, Glenn County in the October 2012 Sacramento Valley Walnut News. Handling Walnut bareroot trees look sturdy but they are very vulnerable to environmental stresses - [Replanting Individual Trees](https://www.sacvalleyorchards.com/walnuts/orchard-development/replanting-individual-trees/) - Adapted from the article “Considerations When Replanting Individual Trees in a Walnut Orchard” by Carolyn DeBuse, Former UCCE Farm Advisor Solano and Yolo Counties; and Bill Krueger, UCCE Farm Advisor Emeritus, Glenn County in the September 2011 Sacramento Valley Walnut News. When a tree dies within a healthy orchard, do you replant or leave that - [Kasumin - A New Tool for Walnut Blight Management](https://www.sacvalleyorchards.com/walnuts/diseases/kasumin-a-new-tool-for-walnut-blight-management/) - After a long and bumpy ride, Kasumin 2L has received final EPA approval and will be available for walnut blight control in 2018. Here are some do's and don'ts for using Kasumin 2L during the blight management season. - [How Will the Freeze Impact Olive Bloom?](https://www.sacvalleyorchards.com/olives/freeze-olive-bloom-observations/) - All eyes have been on almonds during the recent cold snap, but the recent weather has reminded Bill Krueger, Farm Advisor Emeritus in Glenn County, of a similar cold snap in 2006 and the resulting damage to olive bloom. Here I have republished an article Bill wrote of his 2006 olive bloom observations. - [Low Temperatures in the Forecast!](https://www.sacvalleyorchards.com/blog/almonds-blog/low-temperatures-in-the-forecast/) - There are a few nights in the upcoming 10-day forecast that predict temperatures at 32°F or lower. This post contains resources if you need information about frost protection. - [Tehama County Weekly Pest Update - April 10, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-4/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - April 3, 2017](https://www.sacvalleyorchards.com/pest-reports/2017-pest-reports/2017-tehama-pest-update-3/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - March 27, 2017](https://www.sacvalleyorchards.com/pest-reports/2017-pest-reports/2017-tehama-pest-update-2/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - April 17, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-5/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - April 24, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-5-2/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - May 2, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-5-2-2/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - May 8, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-6/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - May 22, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-7/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - May 30, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-8/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - June 5, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-9/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - June 12, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-10/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - June 19, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-11/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - July 3, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-12/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - July 10, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-13/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - July 24, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-14/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - July 31, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-15/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - August 7, 2017](https://www.sacvalleyorchards.com/blog/2017-tehama-pest-update-16/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - August 14, 2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-august-14-2017/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Olive Fly Pest Report](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-pest-report/) - Weekly olive fruit fly counts for locations in Glenn and Tehama counties. - [Tehama County Weekly Pest Update - August 21,2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-august-21/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - August 28, 2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-august-28/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - September 4, 2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-september-4/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - September 18, 2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-september-18/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - September 25, 2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-september-25/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Tehama County Weekly Pest Update - October 2, 2017](https://www.sacvalleyorchards.com/blog/tehama-county-weekly-pest-update-october-2/) - This is the weekly IPM pest update from Tehama county, with biofixes and trap activity for: codling moth, oriental fruit moth, peach twig borer, navel orangeworm, San Jose scale, and walnut scale. - [Southern Sacramento Valley ET Report - June 9, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-8/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - June 9, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-10/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - June 2, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-7/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - June 2, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-9/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - May 26, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-6/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - May 26, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-8/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - May 19, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-5/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - May 19, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-7/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - March 12, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-4/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - May 12, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-6/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - March 5, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-3/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - May 5, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-5/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - April 28, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-2/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - April 28, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-4/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - April 21, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-1/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - April 21, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-3/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Northern Sacramento Valley ET Report](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa CIMIS stations. - [Northern Sacramento Valley ET Report - June 16, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-11/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - June 16, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-9/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - June 23, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-12/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - June 23, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-10/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - June 30, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-13/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - June 30, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-11/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Southern Sacramento Valley ET Report - July 7, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-12/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - July 7, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-13-2/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Northern Sacramento Valley ET Report - September 22, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-24/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - September 22, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-23/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Southern Sacramento Valley ET Report - September 15, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-22/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - September 15, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-23/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - September 8, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-21/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - September 8, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-22/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - September 1, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-20/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - September 1, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-21/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Northern Sacramento Valley ET Report - August 25, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-19-2/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - August 25, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-19/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Southern Sacramento Valley ET Report - August 18, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-18/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - August 18, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-19/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - August 11, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-17/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - August 11, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-18/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Northern Sacramento Valley ET Report - August 4, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-17/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - August 4, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-16/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Southern Sacramento Valley ET Report - July 28, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-15/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - July 28, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-16/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - July 21, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-14/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - July 21, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-15/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Northern Sacramento Valley ET Report - September 29, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-25/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - September 29, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-24/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - October 6, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-26/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - October 6, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-25/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Southern Sacramento Valley ET Report - October 13, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-26/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - October 13, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-27/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Southern Sacramento Valley ET Report - October 20, 2017](https://www.sacvalleyorchards.com/blog/southern-sacramento-valley-et-report-2017-27/) - Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon and Verona CIMIS stations. - [Northern Sacramento Valley ET Report - October 20, 2017](https://www.sacvalleyorchards.com/blog/northern-sacramento-valley-et-report-2017-28/) - Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations. - [Honey Bees and Bloom Sprays](https://www.sacvalleyorchards.com/almonds/honey-bees-and-bloom-sprays/) - It’s time for your annual pollinator safety reminder. It is safe to say that most everyone knows to avoid insecticides when honey bee colonies are in the orchard. - [Thinking About Irrigating This Winter?](https://www.sacvalleyorchards.com/blog/thinking-about-irrigating-this-winter/) - Droughty winters prompt questions about winter irrigation in orchards. The questions seem simple: Should I irrigate this winter? If so, when should I irrigate? How much water should I apply? The answers to these questions aren’t quite so simple. - [Looking Ahead to 2018](https://www.sacvalleyorchards.com/blog/looking-ahead-to-2018/) - Meeting season has already begun to ratchet up! Speaking of meetings, we're in the process of planning agendas and writing talks for a whole slate of upcoming UCCE grower meetings. Keep reading for a master table of the upcoming UC meetings. Happy holidays from all of us, and best wishes as we head into the next cropping year. - [Prune Aphid Management](https://www.sacvalleyorchards.com/prunes/insects-mites-prunes/aphid_management/) - Plum aphids are the major pest of prunes. Fall or winter are good timings to control aphid. So, with harvest over, it’s a good idea to settle on an aphid control plan to protect next year’s crop. - [New Walnut Pest Management Guidelines Released](https://www.sacvalleyorchards.com/blog/walnuts-blog/new-walnut-pest-management-guidelines-released/) - The University of California Integrated Pest Management (UC IPM) program has just published the latest comprehensive revision of the online Pest Management Guidelines for Walnut. - [October IPM Breakfast Meeting - Glenn County](https://www.sacvalleyorchards.com/blog/october-ipm-breakfast-meeting-glenn-county/) - Tuesday, October 10th, 2017, 7:30am – 9:00am at Berry Patch Restaurant (900 Newville Rd, Orland). Join Area IPM Advisor Emily Symmes and Orchard Systems Farm Advisors Dani Lightle and Luke Milliron to discuss current pest management and production issues. DPR and CCA hours requested (1.5 other). - [Regional Changes in Groundwater Levels: Multi-year Drought Followed by Record Setting Wet Year](https://www.sacvalleyorchards.com/blog/regional-changes-in-groundwater-levels-2017/) - Trends in cumulative spring groundwater change by county are shown for a shallow well monitoring network and an intermediate well monitoring network across five northern Sacramento Valley counties. The period of interest includes the spring of 2011 which was a wet water year, 2012 through 2016 which were a series of dry or critically dry water years, followed by 2017 which has been a record-setting wet year. - [Top Five Questions: Evaluating a Water Supply for Suitability to Irrigate Nut Crops](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/evaluating-water-supply-for-irrigating-nut-crops/) - Keep reading to see the answers to the Top 5 Questions for evaluating irrigation water suitability before planting prunes or nut crops. - [Summer Flooded Orchard Damage Update, Part 3: Resources for Flood Damaged Orchards](https://www.sacvalleyorchards.com/walnuts/flooding/flooded-orchard-damage-update-part-3/) - In 2017, high and fluctuating water flows, unprecedented for their duration, passed through the Sacramento and Feather Rivers. Orchards were hurt by these flows due to direct flooding, indirect flooding via under-levee seepage, and loss of land through river bank erosion. Many orchards had standing water from January through mid-May. In other orchards, ditches overflowed with nowhere to pump water out. Part 3 of this article provides some resources that may be helpful for owners of flood damaged orchards. - [Summer Flooded Orchard Damage Update, Part 2: Management Considerations](https://www.sacvalleyorchards.com/walnuts/flooding/flooded-orchard-damage-update-part-2/) - In 2017, high and fluctuating water flows, unprecedented for their duration, passed through the Sacramento and Feather Rivers. Orchards were hurt by these flows due to direct flooding, indirect flooding via under-levee seepage, and loss of land through river bank erosion. Many orchards had standing water from January through mid-May. In other orchards, ditches overflowed with nowhere to pump water out. Part 2 of this article discusses best practices to consider for orchard management after a flood event. - [Summer Flooded Orchard Damage Update, Part 1: Observations and Research Plans](https://www.sacvalleyorchards.com/walnuts/flooding/flooded-orchard-damage-update-part-1/) - In 2017, high and fluctuating water flows, unprecedented for their duration, passed through the Sacramento and Feather Rivers. Orchards were hurt by these flows due to direct flooding, indirect flooding via under-levee seepage, and loss of land through river bank erosion. Many orchards had standing water from January through mid-May. In other orchards, ditches overflowed with nowhere to pump water out. Part 1 of this article details our observations on flooded orchard damage as of early June and current research plans. - [Flooded Orchards, Part 1: Generalities of Flooding Damage](https://www.sacvalleyorchards.com/walnuts/flooding/flooded-orchards-part-1-generalities-of-flooding-damage/) - Experiences with the 1986 and 1997 levee breaks in Yuba and Sutter Counties and other “high–water” events over the past thirty years afford us some expectations for the types and extents of tree damage that may result from orchard flooding in 2017. Part one of this article will first discuss some generalities of flooding damage and two key types of damage that tend to follow prolonged orchard flooding, i.e., waterlogging and Phytophthora diseases. - [Flooded Orchards, Part 2: Reflections on Past Flooding Events](https://www.sacvalleyorchards.com/walnuts/flooding/flooded-orchards-part-2-reflections-on-past-flooding-events/) - Experiences with the 1986 and 1997 levee breaks in Yuba and Sutter Counties and other “high–water” events over the past thirty years afford us some expectations for the types and extents of tree damage that may result from orchard flooding in 2017. Here we reflect on the floods in 1986 and 1997 and considers ways in which specific conditions associated with those floods seemed to affect orchard outcomes. - [Flooded Orchards, Part 3: Management Guidelines to Consider](https://www.sacvalleyorchards.com/walnuts/flooding/flooded-orchards-part-3-management-guidelines-to-consider/) - This is the third in a three part series looking at past experiences of flooded orchards. Here we offer management steps to consider in dealing with orchard flooding in 2017. - [Considerations for Replanting Walnut Orchards](https://www.sacvalleyorchards.com/walnuts/diseases/considerations-for-replanting-walnut-orchards/) - As orchards age, yields decline for a number of reasons and eventually the decision is made to remove the orchard. The age at which an orchard is pulled is a unique decision for each block, depending on yield, price, demand, and resources. Here are a number of recommended steps in removing an orchard, especially when preparing to replant that orchard into walnuts again. - [Harvest Damage Evaluation for Walnuts](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/harvest-damage-evaluation-for-walnuts/) - Harvest of the earliest walnut varieties has begun in some locations. Plan accordingly to obtain the ever-important harvest samples! Harvest samples can reveal a number of common sources of kernel, shell, and hull damage. These include damage caused by insect pests, diseases, and environmental/physiological factors. Here are information, tables, and photos that can help identify the sources of damage in your walnut harvest samples. - [Prune Orchard Nutrition - Springtime Considerations](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/prune-orchard-nutrition-thoughts-for-2017/) - Along with setting a decent prune crop begins the important work of supporting current crop growth and canopy health and return bloom for future production. Adequate orchard nutrition is critical to both these goals. Special care in soil and nutrient management should be taken to maintain profitable crop development and canopy health. Saturated/wet, cold soils - [Techniques to Time First Irrigation Dates for Prune](https://www.sacvalleyorchards.com/prunes/irrigation-prunes/techniques-to-time-first-irrigation-dates-for-prune/) - Written by Allan Fulton, UCCE Farm Advisor Tehama, Glenn, Colusa and Shasta counties and Richard P. Buchner, UCCE Farm Advisor Emeritus, Tehama, Glenn and Butte counties. Overly aggressive, early irrigation can saturate soils and deprive roots of necessary oxygen. Without oxygen, roots often suffocate and die compromising tree performance. In addition, soil fungal pathogens such as - [Approaches to Spider Mite Management in Almonds](https://www.sacvalleyorchards.com/almonds/insects-mites/approaches-to-spider-mite-management-in-almonds/) - Spider mite management in almonds can be accomplished through one of two general approaches: starting with a prophylactic early-season treatment or using threshold-based treatment timings and conservation biological control. Both have pros and cons, and each method can be used to successfully manage spider mites. This article will summarize each method. Prophylactic approach: Early abamectin - [New Advisor Introduction: Mariano Galla](https://www.sacvalleyorchards.com/blog/new-advisor-introduction-mariano-galla/) - I am the new agronomy and weed science farm advisor for Glenn, Butte and Tehama counties, based at the UCCE Glenn office in Orland. I am working in small grains, corn, sunflower, cotton, alfalfa and dry beans. In addition, as a weed science advisor, I am looking forward to also working on weed control in orchard crops. - [Navel Orangeworm in Walnuts 2017 – Stay Alert](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/navel-orangeworm-in-walnuts-2017/) - Although many producers and their crop advisers are reporting average to lower numbers of NOW based on trapping so far this season in almonds (harvest damage remains to be seen), bear in mind some of the issues that can lead to NOW build-up and damage as walnuts approach harvest. Keep reading for management tips to keep in mind as walnut hull split approaches. - [2017 Walnut Insect & Mite Updates](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/walnut-insect-mite-updates/) - The impacts of such an unusually wet winter and prolonged spring rain events on insect and mite activity are still developing. This article summarizes some notable observations thus far and specific pest management considerations as we move into summer. - [New Advisor Introduction: Luke Milliron](https://www.sacvalleyorchards.com/blog/new-advisor-introduction-luke-milliron/) - I am ecstatic to be working as the UC Cooperative Extension (UCCE) orchard systems Farm Advisor for Butte, Glenn, and Tehama Counties. I am based out of the Butte County Cooperative Extension Office in Oroville. - [What to do if you Applied Abamectin to Almonds in May](https://www.sacvalleyorchards.com/almonds/insects-mites/what-to-if-you-applied-abamectin-to-almonds-in-may/) - Early abamectin (Agri-mek®, generics) treatments have become the norm in many almond orchards in this region. However, there could be a downside that may contribute to a later season mite flare up. - [Conditions Right for Blue Prune](https://www.sacvalleyorchards.com/blog/prunes-blog/conditions-right-for-blue-prune/) - Prune growers should be aware that the weather conditions this upcoming week favor development of blue prune. Blue prune drop is associated with the rapid increase of orchard temperatures. We've had a mild spring with temperatures forecast to be in the low- to mid- 90s this week. - [Why are some prune trees yellow in the spring?  The Bicarbonate Blues.](https://www.sacvalleyorchards.com/blog/prunes-blog/why-are-some-prune-trees-yellow-in-the-spring-the-bicarbonate-blues/) - Wet springs often means more yellow, iron (Fe) deficient prune trees than in dry years. Iron deficient prune trees show yellow leaves with green veins and limited vigor. The problem is actually not soil Fe deficiency, but a lack of iron in the right form within trees. Researchers believe Fe deficiency in tree crops is related to soil bicarbonate levels. - [Potassium, Zinc, Manganese, and Iron Deficiencies in a Wet Spring](https://www.sacvalleyorchards.com/almonds/horticulture/potassium-zinc-manganese-and-iron-deficiencies-in-a-wet-spring/) - Potassium, zinc, iron, and manganese nutrient deficiency symptoms are more prevalent where soils are wet, cold, and saturated. Foliar nutrient sprays can provide quick correction of symptoms and improve tree color and vigor if indeed that is the reason trees were performing poorly in the first place. - [The Latest on Managing Bot Canker and Blight in Walnut - 2016 Research Updates](https://www.sacvalleyorchards.com/walnuts/diseases/the-latest-on-managing-bot-canker-and-blight-in-walnut-2016-research-updates/) - Rainfall favors Botryosphaeria (Bot) and Phomopsis canker and blight of walnut when temperatures are over 50° F, so be alert to disease spread this spring and summer. Bot reduces yields by killing small fruit wood and large branches and directly infecting the nut. The focus of this article is on 2016 Bot research findings. - [When Should You Apply the First Irrigation of the Season?](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/when-should-you-apply-the-first-irrigation-of-the-season/) - With the storms moving through, you may not even have irrigation on your radar yet, but we'll be into irrigation season before you know it. How should you decide when to turn the water on? - [Southern Sac Valley Soil Moisture Loss Report - May 13, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-may-13-2016/) - [Northern Sac Valley Soil Moisture Loss Report - May 13, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-may-13-2016/) - [Northern Sac Valley Soil Moisture Loss Report – May 20, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-may-20-2016/) - [Northern Sac Valley Soil Moisture Loss Report - May 27, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-may-27-2016/) - May 27, 2016 ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - June 3, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-may-27-2016-2/) - June 3, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - June 3, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-may-27-2016-3/) - June 3rd ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - June 10, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-june-10-2016-2-2/) - June 10, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - June 10, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-june-10-2016/) - June 10th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - June 17, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-june-17-2016/) - June 17, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - June 17, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-june-17-2016/) - June 17th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - June 24, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-june-24-2016/) - June 24, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - June 24, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-june-24-2016/) - June 24th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - July 1, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report/) - July 1st ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - July 1, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report/) - July 1, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - July 8, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-2/) - July 8, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - July 8, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-2/) - July 8th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - July 15, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-2-2/) - July 15th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - July 15, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-2-2/) - July 15, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - July 22, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-july22/) - July 22nd ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - July 22, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-july22/) - July 22nd, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - July 29, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-july29/) - July 29th, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - July 29, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-july29/) - July 29th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. **NEW** By request, cling peach ET is now being reported! - [Southern Sac Valley Soil Moisture Loss Report - Aug 5, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-aug5-2/) - August 5th, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - August 5, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-aug0516/) - August 5th, 2016 ET Report for the Gerber South, Durham, and Colusa CIMIS stations. **NEW** By request, cling peach ET is now being reported! - [Northern Sac Valley Soil Moisture Loss Report - August 12, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-aug1216/) - August 12th, 2016 ET Report for the Gerber South, Durham, and Colusa CIMIS stations. **NEW** By request, cling peach ET is now being reported! - [Southern Sac Valley Soil Moisture Loss Report - Aug 12, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-aug12/) - August 12th, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Aug 19, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-aug19/) - August 19th, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - August 19, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-aug1916/) - August 19th, 2016 ET Report for the Gerber South, Durham, and Colusa CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Aug 26, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-aug26/) - August 26th, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - August 26, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-aug2616/) - August 26th, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Sept 2, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-sept2/) - September 2nd, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - September 2, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-sept2/) - September 2nd, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - September 9, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-sept9/) - September 9th, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Sept 9, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-sept9/) - September 9, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Sept 16, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-sept16/) - September 16, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Sept 23, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-sept23/) - September 23, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - September 16, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-sept16/) - September 16th, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - September 23, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-sept23/) - September 23, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - Sept 30, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-sept30/) - September 30, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - September 30, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-sept30/) - September 30, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - October 7, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-oct7/) - October 7th, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - October 6, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-oct6/) - October 6, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - October 13, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-oct13/) - October 13, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Northern Sac Valley Soil Moisture Loss Report - October 14, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/northern-sac-valley-soil-moisture-loss-report-oct14/) - October 14th, 2016 ET Report for the Gerber South, Durham, and Williams (formerly Colusa) CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - October 20, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-oct20/) - October 20, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - October 27, 2016](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/southern-sac-valley-soil-moisture-loss-report-oct27/) - October 27, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Southern Sac Valley Soil Moisture Loss Report - November 3, 2016](https://www.sacvalleyorchards.com/blog/southern-sac-valley-soil-moisture-loss-report-nov3/) - November 3, 2016 ET Report for the Woodland, Davis, Dixon, and Verona CIMIS stations. - [Monitoring Codling Moth In and Near Mating Disruption Orchards](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/monitoring-codling-moth-in-and-near-mating-disruption-orchards/) - It is important to understand how mating disruption affects the ability to monitor codling moth in walnut orchards under mating disruption (MD) as well as in orchards in proximity to MD. Other monitoring methods are necessary in and near MD orchards to effectively manage codling moth populations. - [Monitoring for Walnut Scales](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/monitoring-for-walnut-scales/) - Increased incidences of scale have been observed in Sacramento Valley walnut orchards for upwards of 10 years. Reasons for scale increases in walnut are not entirely known. Commonly, when a secondary pest emerges as a problem, it is because something else within the system has changed, allowing conditions to favor the pest. For example, the - [Walnut Dormant Monitoring and Treatment Decisions](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/walnut-dormant-monitoring-and-treatment-decisions/) - Dormant monitoring helps to decide whether to pursue treatments of some pests (primarily scales and mites) in the dormant or delayed dormant period. This timing can be quite effective. Coverage tends to be very good since there are no leaves in the way of the application. Additionally, most natural enemies are not active during these - [Olive Fly Counts - May 16, 2016](https://www.sacvalleyorchards.com/pest-reports/2016-pest-reports/olive-fly-counts-may-16-2016/) - [IPM Insect Update - May 31, 2016](https://www.sacvalleyorchards.com/pest-reports/2016-pest-reports/ipm-insect-update-may-31-2016/) - University of California IPM Insect Update Tehama County 5/31/16 Notice the male Codling moth biofix of 3/24/16. Our in- orchard weather stations show a 1065 Degree day accumulation. The next event should be the second flight at about 1060 DD or anytime now. Second OFM biofix 5/19 monitored in almond just south of Red Bluff. - [IPM Insect Update - June 6, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-june-6-2016/) - Tehama County Insect Pest Update for June 6, 2016. - [Olive Fly Counts - June 6, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-june-6-2016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [Olive Fly Counts - June 13, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-june-13-2016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - June 13, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-june-13-2016/) - Tehama County Insect Pest Update for June 13, 2016. - [IPM Insect Update - June 20, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-june-20-2016/) - Tehama County Insect Pest Update for June 20, 2016. - [Olive Fly Counts - June 20, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-june-20-2016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - June 27, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-june-27-2016/) - Tehama County Insect Pest Update for June 27, 2016. - [Olive Fly Counts - June 27, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - July 5, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update/) - Tehama County Insect Pest Update for July 5, 2016. - [Olive Fly Counts - July 4, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-2/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - July 11, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-2/) - Tehama County Insect Pest Update for July 11, 2016. - [Olive Fly Counts - July 11, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-3/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - July 18, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-2-2/) - Tehama County Insect Pest Update for July 18, 2016. - [Olive Fly Counts - July 19, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-3-2/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - July 25, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-july252016/) - Tehama County Insect Pest Update for July 25, 2016. - [Olive Fly Counts - July 25, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-july252016-2/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - August 1, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-aug12016/) - Tehama County Insect Pest Update for July 25, 2016. - [Olive Fly Counts - August 1, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-aug12016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - August 8, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-aug82016/) - Tehama County Insect Pest Update for July 25, 2016. - [Olive Fly Counts - August 8, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-aug82016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - August 15, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-aug152016/) - Tehama County Insect Pest Update for August 15, 2016. - [Olive Fly Counts - August 15, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-aug152016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - August 22, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-aug222016/) - Tehama County Insect Pest Update for August 22, 2016. - [Olive Fly Counts - August 22, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-aug222016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - August 29, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-aug222016-2/) - Tehama County Insect Pest Update for August 29, 2016. - [Olive Fly Counts - August 29, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-aug222016-2/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - September 6, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-aug222016-2-2/) - Tehama County Insect Pest Update for September 6, 2016. - [Olive Fly Counts - September 12, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-sep122016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - September 12, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-september122016/) - Tehama County Insect Pest Update for September 12, 2016. - [IPM Insect Update - September 19, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-september192016/) - Tehama County Insect Pest Update for September 19, 2016. - [Olive Fly Counts - September 19, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-sep192016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [Olive Fly Counts - October 4th, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-oct42016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [Olive Fly Counts - October 18th, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-oct182016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [Olive Fly Counts - October 24th, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-oct242016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [Olive Fly Counts - October 31th, 2016](https://www.sacvalleyorchards.com/blog/olives-blog/olive-fly-counts-oct312016/) - Olive Fruit Fly Populations for Glenn & Tehama Counties - [IPM Insect Update - September 26, 2016](https://www.sacvalleyorchards.com/blog/ipm-insect-update-september262016/) - Tehama County Insect Pest Update for September 26, 2016. - [Resources for Flooded Orchards](https://www.sacvalleyorchards.com/blog/almonds-blog/resources-for-flooded-orchards/) - Too much rain for you this winter? This post contains information on record keeping and resources for damages related to the flooding observed this winter. - [Blast! Area Almonds are Showing Bacterial Blast Symptoms](https://www.sacvalleyorchards.com/blog/almonds-blog/blast-area-almonds-are-showing-bacterial-blast-symptoms/) - Many almond growers in the Butte area were running sprinklers late last month for frost protection. I haven't had any growers bring freeze damage to my attention yet, but over the last couple days several orchards began showing symptoms of bacterial blast. - [March IPM Breakfast Meeting](https://www.sacvalleyorchards.com/blog/almonds-blog/march-ipm-breakfast-meeting/) - Reminder! Sutter-Yuba Counties IPM Breakfast Meeting next Tuesday, March 14th, 2017 at 7:30am. We will largely focus on orchards crops (but everything is on the table for discussion!). Planned topics include managing spring diseases in a wet year and getting your pest monitoring program started for the season. Please contact Area IPM Advisor Emily Symmes - [Chilling Hours Update - Yuba City](https://www.sacvalleyorchards.com/blog/walnuts-blog/chilling-hours-update-yuba-city/) - How are we doing on chill so far this year? Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chill based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. - [Frost Protection](https://www.sacvalleyorchards.com/almonds/horticulture/frost-protection-2/) - Adapted from the article “Implementing frost protection” by Joe Connell, UC Farm Advisor, Butte County, in the February 2011 Sacramento Valley Almond News. Frost Protection Mild, radiation frosts occur on still, clear nights, usually with the development of a strong inversion. Cold air accumulates in low spots or in areas where air drainage is blocked. - [Protect Bees from Pesticides by Using Bee Precaution Ratings from UC IPM](https://www.sacvalleyorchards.com/almonds/pollination/protect-bees-from-pesticides-by-using-bee-precaution-ratings-from-uc-ipm/) - Various insects, birds, and other animals pollinate plants. Bees, especially honey bees, are the most vital for pollinating food crops. UC IPM developed Bee Precaution Pesticide Ratings to help pest managers make an informed decision about how to protect bees when choosing or applying pesticides. - [Notice: DPR Grants Emergency Exemption to Orchards with Standing Water](https://www.sacvalleyorchards.com/uncategorized/emergency-application-of-fungicides-to-orchards-with-standing-water/) - California DPR has granted an emergency exemption for fungicide applications to orchards that have standing water until June 1st, 2017. Keep reading for more information on which counties are affected and what restrictions you should keep in mind. - [Reminder! IPM Breakfast Meeting- Tuesday, February 14th](https://www.sacvalleyorchards.com/blog/almonds-blog/reminder-ipm-breakfast-meeting-tuesday-february-14th/) - Starting at 7:30am -- We will largely focus on orchards crops (but everything is on the table for discussion!). Planned topics include managing winter & spring diseases in a wet year, pollinator safety during bloom, and getting your pest monitoring program started for the season. Please contact Area IPM Advisor Emily Symmes to request additional - [Are You In Compliance with the New Worker Protection Standards?](https://www.sacvalleyorchards.com/blog/almonds-blog/are-you-in-compliance-with-the-new-worker-protection-standards/) - We are in the midst of a new and changing era of Worker Protection Standards (WPS), which is meant to increase protections for agricultural fieldworkers and pesticide handlers from pesticide exposure when they’re working in farms, forests, nurseries and greenhouses. Keep reading to learn about current and upcoming changes, as well as information on Instructor Training Programs. - [Protecting Honey Bees During Bloom](https://www.sacvalleyorchards.com/almonds/pollination/protecting-honey-bees-during-bloom/) - With almond bloom on the horizon, it is time to revisit best management practices for protecting pollinators during this critical time. Remember that communication is key during the bloom period. Keep reading to make sure that you are taking care of your pollinators. - [Honeybees, Colony Strength, and Beekeeper Challenges](https://www.sacvalleyorchards.com/almonds/pollination/honeybees-colony-strength-and-beekeeper-challenges/) - Always be aware of honey bees when they’re in your orchard to pollinate your crop. After all, you’re paying good money for the bees to do a critical job! You can go a long way toward protecting the health of honey bee colonies by avoiding contamination of pollen and pollen foragers and by avoiding products with potential toxicity to honey bees or their larvae while bees are in your orchard. This is good husbandry and it’s in the interest of both the grower and the beekeeper. - [Help Wanted: Join the Dialogue on Herbicide Resistant Weeds](https://www.sacvalleyorchards.com/uncategorized/help-wanted-join-the-dialogue-on-herbicide-resistant-weeds/) - Are you planning on attending the World Ag Expo? As part of a national effort on developing research and regulatory priorities related to the challenging problems of herbicide-resistant weeds, the Weed Science Society of America is sponsoring a half-day regional workshop to discuss the issues, potential solutions, and technical and economic barriers related to resistant weeds. - [Potted Tree Irrigation after Planting: Getting the First Year Right](https://www.sacvalleyorchards.com/almonds/irrigation/potted-tree-irrigation-after-planting-getting-the-first-year-right/) - Potted trees may be the nursery stock of the future, but they have challenges and a learning curve for growers accustomed to planting bare root trees. One of the major challenges is irrigating during the orchard’s first year. - [Dormant Monitoring for San Jose Scale in Almond](https://www.sacvalleyorchards.com/almonds/insects-mites/dormant-monitoring-for-san-jose-scale-in-almond/) - Dormant monitoring is an important activity that can help you decide whether to pursue treatments of some pests (primarily scales and mites) in the dormant or delayed dormant period. - [Food for thought when planting a new prune orchard](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/food-for-thought-when-planting-a-new-prune-orchard/) - If you are planning a prune orchard in the near future, here’s something to think about. Prune farming is about turning sunlight into sugar: the more sunlight your trees “catch” per acre, the greater the potential crop production. - [ET Test Report](https://www.sacvalleyorchards.com/uncategorized/et_test/) - [Scale Pests](https://www.sacvalleyorchards.com/prunes/scale-pests/) - Adapted from the article “Scale Pests in Prune Orchards and Keeping a Balance of Natural Enemies to Control Them” by Carolyn DeBuse, UC Farm Adviser, Solano and Yolo Counties in the October 2010 Sacramento Valley Prune News Three scale pests are commonly found in prune orchards. San Jose scale (Diaspididae perniciosus) is generally of the - [When to Harvest](https://www.sacvalleyorchards.com/prunes/when-to-harvest/) - Adapted from the articles “When will harvest start in 2011?” by Franz Niederholzer, UC Farm Advisor, Colusa and Sutter/Yuba Counties and Bill Krueger, UC Farm Advisor, Glenn County and “Using Spring Weather Data to Predict Harvest Date for “Improved French” Prune” by Ted DeJong, Pomologist UC Davis, Carolyn DeBuse, UC Farm Advisor, Solano-Yolo Counties, and - [Bacterial Blast and Canker](https://www.sacvalleyorchards.com/almonds/bacterial-blast-and-canker/) - Adapted from the article “Bacterial blast” by Joe Connell, UC Farm Advisor, Butte County and Carolyn DeBuse, UC Farm Advisor, Solano and Yolo County in the April 2011 Sacramento Valley Almond News Cold, frosty, and wet weather at bloom often results in bacterial blast, Pseudomonas syringae, killing flowers and spurs on varieties in susceptible growth - [Pollinator Options in Addition to Honey Bees](https://www.sacvalleyorchards.com/almonds/pollination/pollinator-options-in-addition-to-honey-bees/) - Adapted from the articles “Blue Orchard Bees -- Potential for Almond Pollination?” by Carolyn Pickel, Area IPM Advisor, Glenn Nader, Farm Advisor Sutter-Yuba and Joe Connell, Farm Advisor Butte County and “Almond orchards with wild insects have higher fruit set” by Claire Brittain, Claire Kremen, Neal Williams, Robbin Thorp, Stephen Hendrix, Alexandra-Maria Klein at Leuphana - [Yellowing Trees](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/yellowing-trees/) - Adapted from the article “Why are some individual young walnut trees turning yellow and not growing?” by Richard Buchner and Joe Connell, UCCE Farm Advisors, Tehama and Butte Counties in the September 2010 Sacramento Valley Walnut News When an individual young walnut tree turns yellow compared to all of its neighbors it often indicates that - [Honey Bee Safety During Bloom](https://www.sacvalleyorchards.com/almonds/pollination/honey-bee-safety-during-bloom-2/) - Adapted from the article “Honey Bee Safety During Bloom” by Emily J. Symmes, UCCE Area IPM Advisor, Sacramento Valley in the December 2014 Sacramento Valley Almond News. Honey bee safety is not a new concept in agriculture, particularly for almond growers, so be sure to follow best practices for honey bee health during almond pollination. - [Almond Scab](https://www.sacvalleyorchards.com/almonds/foliar-diseases/almond-scab/) - Adapted from the article “Tackling Last Season’s Outbreak of Almond Scab in Spring 2007 – An Update” by Joseph Connell, UC Farm Advisor, Butte Co. in the April 2007 Sacramento Valley Almond News. Almond scab is a fungal disease of twigs, leaves, and fruit. Symptoms develop in spring and early summer and may cause pre-mature - [Leaf Rust of Almond](https://www.sacvalleyorchards.com/almonds/foliar-diseases/leaf-rust-of-almond/) - Leaf rust, favored by high humidity and leaf wetness, was prevalent in most vigorous young Sacramento Valley orchards this year. The late rains in May and mid-June really got it going in some locations, with additional fungicide treatments needed to minimize defoliation. - [Navel Orangeworm in Walnut](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/navel-orangeworm-in-walnut/) - The economic impact of navel orangeworm (NOW) in walnuts has become an increasing concern for Sacramento Valley growers in recent years. In 2014, there were several reports of high worm damage attributed to NOW from growers and processors. In 2015, we experienced higher than typical NOW pressure in other Sacramento Valley crops. Here we summarize - [Walnut Husk Fly Trap and Low Volume Spray Study](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/walnut-husk-fly-trap-and-low-volume-spray-study/) - Adapted from "Walnut Husk Fly Trap and Low Volume Spray Study Update" by Janine Hasey, UCCE Farm Advisor, Sutter, Yuba & Colusa Cos, and Bob VanSteenwyk, Research Entomologist, UC Berkeley, in Sacramento Valley Walnut News, July 2014. Walnut husk fly (WHF) has begun emerging earlier in the Sacramento Valley than it has historically. We are - [Pacific Spider Mites](https://www.sacvalleyorchards.com/almonds/insects-mites/pacific-spider-mites/) - Adapted from the article “Pacific spider mite control at hull split in almonds” by David Haviland, Entomology Farm Advisor, UC Cooperative Extension, Kern Co. in the April 2010 Sacramento Valley Almond News. Hull split is one of the most critical times of the year for managing spider mites in almonds. At this time, hot weather, - [Preharvest & Harvest Prune Orchard Practices in a Tough Year](https://www.sacvalleyorchards.com/blog/prunes-blog/preharvest-harvest-prune-orchard-practices-in-a-tough-year/) - The 2016 prune crop in California is forecast to be 45,000 dried tons, or about 1000 lbs dried fruit/acre based on current acreage data provided by growers. The crop for next year is beginning to develop this year, so deficiencies this year can limit the crop next year. Cutting back instead of eliminating inputs/investment is the best approach in a year like this, keeping in mind that next year might be tough, too, if there is a big crop that has to be farmed with the light returns from this year. The following are some practices to consider in every year, modified in light of the challenges of a light crop. - [Tipping the Scales to Favor Walnut Quality](https://www.sacvalleyorchards.com/blog/walnuts-blog/tipping-the-scales-to-favor-walnut-quality/) - In years when walnuts have a lower value, it is important to produce quality, light-colored kernels to maximize profitability. Here are some suggestions for producing high quality nuts. - [Yellow Prune Leaves in June?](https://www.sacvalleyorchards.com/blog/prunes-blog/yellow-prune-leaves-in-june/) - Do the leaves in Photo 1 and 2 look familiar? Lately, these symptoms have been showing up in prune orchards all over the Sacramento Valley. What causes these symptoms? I’m not sure, and nobody I’ve asked can tell me with total confidence, either. - [Treating Crown Gall](https://www.sacvalleyorchards.com/walnuts/diseases/treating-crown-gall/) - Due to superior vigor, more adaptability to marginal soils, and greater tolerance to Phytophthora crown and root rot and water logging conditions, English walnut varieties on Paradox hybrid rootstock are the preference of most California walnut growers. The major disadvantage of Paradox rootstock is its high susceptibility to crown gall caused by the bacterium Agrobacterium - [Walnut Husk Fly - Updates](https://www.sacvalleyorchards.com/blog/walnuts-blog/whf-updates/) - Walnut husk fly (WHF) continues to plague walnut production in many areas, often requiring multiple insecticide applications each growing season to achieve adequate control. This pest provides particular challenges to an integrated pest management program due to the nature of its life cycle and lack of natural enemies. Precise timing based on monitoring method and rotation of chemistries to minimize resistance risk are keys to successful long-term control of this pest. - [Northern California Cropping and Irrigation Patterns (Part 2)](https://www.sacvalleyorchards.com/blog/almonds-blog/northern-california-cropping-and-irrigation-patterns-part-2/) - Methods of irrigation have also changed from flood and furrow to drip, micro sprinkler, solid set sprinkler, and buried drip. Today, there are about 203,000 acres of land in the northern Sacramento Valley irrigated with pressurized systems that were not in place approximately a decade ago. - [Walnut Husk Fly Biology, Monitoring, and Spray Timing](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/walnut-husk-fly-biology-monitoring-and-spray-timing/) - Written by Emily J. Symmes, UCCE Area IPM Advisor; Bob Van Steenwyk, UCCE Entomology Specialist; Bill Coates, UCCE Farm Advisor Emeritus, San Benito, Santa Cruz, Santa Clara, and Monterey Counties; and Janine Hasey, UC Farm Advisor, Sutter, Yuba, and Colusa Counties. Updated September 2016. Walnut husk fly (WHF) continues to plague walnut production in many - [Northern California Cropping and Irrigation Patterns (Part 1)](https://www.sacvalleyorchards.com/blog/almonds-blog/northern-california-cropping-and-irrigation-patterns-part-1/) - The most recent land use surveys by the California Department of Water Resources indicate approximately 982,500 acres of irrigated or potentially irrigated cropland in the Northern Sacramento Valley counties of Shasta, Tehama, Glenn, Butte, and Colusa. Manual field surveys taken approximately one decade apart suggest the total crop acreage has increased by about 73,000 acres or 8 percent. - [Navel Orangeworm Management Considerations to Protect Walnut Quality](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/navel-orangeworm-management-considerations-to-protect-walnut-quality/) - Degree-day model predictions from local almond orchards indicate that a fourth NOW flight is expected to occur when many walnut varieties are at their peak susceptibility. In a year when crop value has declined, ensuring high quality nuts is critical. Here are some considerations for NOW management in walnut. - [Early Registration Ends September 1 for the Almond Short Course](https://www.sacvalleyorchards.com/blog/almonds-blog/early-registration-ends-september-1-for-the-almond-short-course/) - UC ANR Cooperative Extension in collaboration with UC Davis is offering an integrated orchard management short course on all phases of almond culture and production on November 8-10, 2016 in Modesto. The program will provide participants the latest information and research from UC Faculty, Cooperative Extension Specialists, and Farm Advisors. - [Protect Bees from Pesticides using Bee Precaution Ratings from UC IPM](https://www.sacvalleyorchards.com/almonds/pollination/protect-bees-from-pesticides-using-bee-precaution-ratings-from-uc-ipm/) - Contributed by the UC Statewide IPM Program, August 2016. Various insects, birds, and other animals pollinate plants. Bees, especially honey bees, are the most vital for pollinating food crops. Many California crops rely on bees to pollinate their flowers and ensure a good yield of seeds, fruit, and nuts. Pesticides, especially insecticides, can harm bees - [Beware of Anthracnose!](https://www.sacvalleyorchards.com/almonds/foliar-diseases/beware-of-anthracnose/) - Did you notice yellow, flagging almond branches this spring? The anthracnose fungus overwinters in infected mummies left on the tree and in dead twigs or branches resulting from infections the previous year. This year’s infections start when spores are splash dispersed by rain to the bloom or to new nuts. If small nuts are infected, they shrivel and turn a rusty orange color. Later in the season, if hulls are infected when nuts are full size, hulls gum and begin to shrivel. - [New Olive Disease in California](https://www.sacvalleyorchards.com/olives/diseases-olives/new-olive-disease-in-california/) - Earlier this spring, oil olives with severe defoliation in San Joaquin county were sent in for diagnosis by UC Plant Pathologist Florent Trouillas. He has isolated a putative pathogen, Neofabraea species. In addition to defoliation, leaf lesions and elongate twig lesions were also associated with this fungus. Here is a list of what we know and don't know about this disease. - [Catch-frame shaker sets in almonds?](https://www.sacvalleyorchards.com/blog/almonds-blog/catch-frame-shaker-sets-in-almonds/) - Almonds are typically shaken to the ground by a side mount or boom shaker, allowed to dry where they fall for several days to weeks and then windrowed and picked up. Recently, some growers have moved to shaking and sweeping within 24 hours. Another alternative to traditional almond harvest is the use of catch frame shaker sets instead of shake-to-the-ground machines. - [It's that Hull Rot Time of Year!](https://www.sacvalleyorchards.com/blog/almonds-blog/its-that-hull-rot-time-of-year/) - Most of our Nonpareils are already on the ground in the northern Sac Valley, but during a few recent orchard walk-throughs, I've seen some instances of hull rot on pollinator varieties. - [Branch Wilt](https://www.sacvalleyorchards.com/walnuts/diseases/branch-wilt/) - Hot weather favors the fungal disease Branch Wilt (Nattrassia mangiferae, formerly Hendersonula toruloidea). Below are the main points you need to know to recognize and manage this walnut disease. Typically in July and August after a hot spell, the first symptom of branch wilt is yellowing and browning of the outermost branches usually on the southwest exposure of the tree (Photo 1). - [Interpreting Soil Test Results](https://www.sacvalleyorchards.com/almonds/horticulture/interpreting-soil-test-results/) - Adapted from “Soil testing and analysis: what to expect in the report” by Allan Fulton, Farm Advisor, Tehama, Glenn, Colusa, and Shasta Counties and Dirk Holstege, Director Analytical Laboratory, University of California Davis Agriculture and Natural Resources in the May 2009 Sacramento Valley Walnut News. Agricultural laboratories usually analyze and report soil salinity and fertility - [Irrigating Young Trees](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/irrigating-young-trees/) - Adapted from the article “Irrigation Management Tools for Developing Walnut Trees” by Richard P. Buchner, UCCE Farm Advisor, Tehama County, Allan E. Fulton, UCCE Farm Advisor, Tehama, Glenn, Colusa and Shasta Counties in the July 2014 Sacramento Valley Walnut News. Irrigation management decisions for young trees are more challenging compared to mature trees. In mature - [Aphids and Mites](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/aphids-and-mites/) - Adapted from the article “Continue Watching for Aphid and Spider Mite Infestations” by Bill Krueger, UCCE Farm Advisor Emeritus, Glenn County in the August 2009 Sacramento Valley Walnut News. Aphids There are two aphid species that damage walnuts, the walnut aphid (a small yellow aphid usually found on the lower surface of the leaf) and - [Phytophthora Management](https://www.sacvalleyorchards.com/walnuts/diseases/phytophthora-management/) - Adapted from the article “Managing Phytophthora in Walnuts” by Bill Krueger, UCCE Farm Advisor Emeritus, Glenn County and Greg Browne, USDA Research Plant Pathologist, UC Davis in the March 2010 Sacramento Valley Walnut News. Phytophthora crown and root rot is a serious cause of tree loss for most tree crops, including walnut. The disease is - [Winter Irrigation During Drought](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/winter-irrigation-during-drought/) - Adapted from the article “Winter Irrigation During Drought” by Joseph H. Connell, UCCE Farm Advisor Emeritus, Butte County in the December 2008 Sacramento Valley Walnut News. We know that during the winter months walnuts can be hurt by either too much or too little water. It’s been a very dry fall so far and the - [Rust](https://www.sacvalleyorchards.com/almonds/foliar-diseases/rust/) - Adapted from the article “Alternaria leaf spot and leaf rust of almond” by Joseph Connell, UCCE Farm Advisor, Butte County, and Dr. Jim Adaskaveg, Professor, Department of Plant Pathology and Microbiology, University of California Riverside, in the July, 2013 Sacramento Valley Almond Newsletter. Almond rust is becoming more prevalent in the Sacramento Valley. The disease - [Observations on Krymsk 86](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/observations-on-krymsk-86/) - Adapted from the article “Observations on Krymsk 86 rootstock” by Joe Connell, UC Farm Advisor, Butte County in the September 2011 Sacramento Valley Almond News Krymsk 86 is a peach-plum hybrid rootstock (Prunus persica x P. cerasifera) that originated in the Krasnodar region of Russia. As such, this hybrid rootstock is different than any other - [Nematodes, Rotation Crops and Intercrops](https://www.sacvalleyorchards.com/almonds/horticulture/nematodes-rotation-crops-and-intercrops/) - Adapted from the article “General Guidelines for Sacramento Valley Orchardists Wishing to select Rotation Crops and Intercrops that do not increase Nematode Pests” by Michael McKenry, Extension Nematologist, Kearney Agricultural Center in the July 2011 Sacramento Valley Almond News. The two nematodes of major concern to Sacramento Valley orchardists are root lesion nematode, Pratylenchus vulnus, - [Leaf Blight](https://www.sacvalleyorchards.com/almonds/foliar-diseases/leaf-blight/) - Adapted from the article “Leaf blight” by Joseph Connell, UCCE Farm Advisor, Butte Co. in the October 2012 Sacramento Valley Almond News Leaf blight is caused by the fungus, Seimatosporium lichenicola. The fungus kills individual infected leaf petioles, cutting off water to the leaf. Individual leaves on spurs or shoots wither and die usually in - [Alternaria Leaf Spot](https://www.sacvalleyorchards.com/almonds/alternaria-leaf-spot-and-leaf-rust/) - Adapted from the article “Alternaria leaf spot and leaf rust of almond” by Joseph Connell, UCCE Farm Advisor, Butte County, and Dr. Jim Adaskaveg, Professor, Department of Plant Pathology and Microbiology, University of California Riverside, in the July, 2013 Sacramento Valley Almond Newsletter Alternaria leaf spot is becoming more prevalent in the Sacramento Valley. The - [Fruit Brown Rot](https://www.sacvalleyorchards.com/prunes/fruit-brown-rot/) - Adapted from the articles “Managing fruit brown rot and prune rust” by Joe Connell, UC Farm Advisor, Butte County and “Managing fruit brown rot in prunes” by Franz Niederholzer, UC Farm Advisor, Sutter/Yuba Counties in the Sacramento Valley Prune News, July 2011 and July 2010, repectively For fruit brown rot, management is based on prevention - [Pruners Pocket Guide for Cutting out Cytospora](https://www.sacvalleyorchards.com/prunes/pruners-pocket-guide-for-cutting-out-cytospora/) - [Fall Weed Management](https://www.sacvalleyorchards.com/prunes/fall-weed-management/) - Adapted from the article “Fall Weed Management Considerations in Prune Orchards” by Emily J. Symmes, UCCE Area IPM Advisor, Sacramento Valley and John Roncoroni, UCCE Perennial Crops Weed Science Advisor, Napa County in the October 2014 Sacramento Valley Prune News Post-harvest weed surveys are essential for effective integrated weed management. Identifying the perennials, germinating winter - [Prune Rust Management Plan](https://www.sacvalleyorchards.com/prunes/prune-rust-management-plan/) - Adapted from the article “Prune Rust Management Plan” by Carolyn DeBuse, UC Farm Advisor, Solano/Yolo Co. in the April 2010 Sacramento Valley Prune News. Leaf rust is caused by a fungal pathogen Tranzschelia discolor which over winters as spores on the buds and branches of the tree. Orchards that were infected heavily last year have - [Honey Bee Safety During Bloom](https://www.sacvalleyorchards.com/prunes/honey-bee-safety-during-bloom/) - Adapted from the article “Honey Bee Safety During Prune Bloom” by Franz Niederholzer, UCCE Farm Advisor, Colusa/Sutter/Yuba Counties and Emily J. Symmes, UCCE Area IPM Advisor, Sacramento Valley in the February 2015 Sacramento Valley Prune News Prune growers grow prunes. Beekeepers keep bees. Why should prune growers be concerned about long-term bee hive health? Because - [Aphids – Fall & Winter Preventative Management](https://www.sacvalleyorchards.com/prunes/aphids-fall-winter-preventative-management/) - Adapted from the article “Fall spray for prune aphid management” by Franz Niederholzer, UC Farm Advisor, Colusa/Sutter/Yuba Counties in the Sacramento Valley Prune News, October 2012 Prune aphids – mealy plum and/or leaf curl plum aphid – are key pests of prune. High populations of these pests can reduce tree vigor, fruit sugar content and - [Aphids - Spring & Summer Management](https://www.sacvalleyorchards.com/prunes/aphids-spring-summer-management/) - Adapted from the article “A new season – When to begin irrigating and how much water to apply?” by Richard P. Buchner & Allan E. Fulton, UCCE Farm Advisors, Tehama County in the April 2011 Sacramento Valley Prune News Growth of tender leaf tissue also signals the beginning of aphid season, especially if a fall - [Irrigation: When to Start and How Much to Apply](https://www.sacvalleyorchards.com/prunes/irrigation-when-to-start-and-how-much-to-apply/) - Adapted from the article “A new season – When to begin irrigating and how much water to apply?” by Richard P. Buchner & Allan E. Fulton, UCCE Farm Advisors, Tehama County in the April 2011 Sacramento Valley Prune News Crop load has a major effect on the final fruit size and quality of French prune. - [Irrigating Using ETc](https://www.sacvalleyorchards.com/irrigation-mgmt/irrigating-using-etc/) - Adapted from the article “Orchard Irrigation 2013” by Richard P. Buchner & Allan E. Fulton, UCCE Farm Advisors, Tehama County in the April 2013 Sacramento Valley Prune News Increasingly, orchard producers are using various methods of monitoring and science-based information to more precisely decide when to begin irrigating and how much water to apply in - [Irrigating During a Drought - Scenarios](https://www.sacvalleyorchards.com/prunes/irrigating-during-a-drought-scenarios/) - Adapted from the article “Deficit Irrigation for French Prune” by Richard P. Buchner – UC Cooperative Extension Farm Advisor, Tehama County and Allan E. Fulton –UC Cooperative Extension Farm Advisor, Tehama, Glenn, Colusa and Shasta Counties in the June 2014 Sacramento Valley Prune News. This article discusses managing irrigation with a severe reduction in irrigation water. - [Principles of Irrigating During a Drought](https://www.sacvalleyorchards.com/prunes/principles-of-irrigating-during-a-drought/) - Adapted from the article “Irrigating French prune during a drought” by Richard P. Buchner – UC Cooperative Extension Farm Advisor, Tehama County and Allan E. Fulton –UC Cooperative Extension Farm Advisor, Tehama, Glenn, Colusa and Shasta Counties in the April 2014 Sacramento Valley Prune News. The first way to manage a limited water supply is - [Irrigation System Maintenance](https://www.sacvalleyorchards.com/almonds/irrigation/irrigation-system-maintenance/) - Adapted from the article “Irrigation System Maintenance” by Dani Lightle, UCCE Glenn, Butte & Tehama Cos. and Kevin Greer, TCRCD Mobile Irrigation Lab, from the October 2014 Sacramento Valley Prune News. Maintaining uniform distribution of irrigation water is critical for optimizing irrigation efficiency and scheduling. High distribution uniformity (DU) ratings indicate even water supply across - [Eriophyid Mites](https://www.sacvalleyorchards.com/prunes/eriophyid-mites/) - Adapted from the article "Eriophyid mites can damage the growth of young prune trees" by Carolyn DeBuse, UC Farm Advisor, Solano and Yolo Counties in the April 2010 Sacramento Valley Prune News. Eriophyid mites are a group of very small plant feeding mites. The two most common eriophyid mites found in prune orchards are the - [Understanding a Soil Test – pH and SP](https://www.sacvalleyorchards.com/almonds/horticulture/understanding-a-soil-test-ph-and-sp/) - Adapted from the article “Understanding and applying information from a soil test: Part 1” by Allan Fulton, Farm Advisor: Tehama, Glenn, Colusa, and Shasta Counties in the April 2010 Sacramento Valley Almond News Why Test? Soil testing helps plan to prevent or correct nutrient deficiencies, toxicities, or conditions that affect the available soil water before - [Bacterial Spot of Almond](https://www.sacvalleyorchards.com/almonds/foliar-diseases/bacterial-spot-of-almond/) - Adapted from the article “Bacterial Spot of Almond in California – Update on the Disease and its Management” by J. E. Adaskaveg, University of California, Riverside, B. Holtz, R. Duncan, and D. Doll, UCCE, San Joaquin, Stanislaus, and Merced Co., respectively, from the December 2014 Sacramento Valley Almond News. Bacterial spot is a new bacterial - [Bacterial Canker and Blast](https://www.sacvalleyorchards.com/prunes/bacterial-canker-and-blast/) - Adapted from the article “Bacterial Canker and Blast in Prunes” by Bill Krueger UC Farm Advisor, Glenn County in the February 2010 Sacramento Valley Prune News Bacterial canker is a serious disease of all Prunus species. The causal bacteria, Psuedomonas syringae is widespread in nature producing disease under predisposing conditions such as high ring nematode - [Pruning and Training](https://www.sacvalleyorchards.com/almonds/pruning-and-training/) - Adapted from “Pruning and training young almond trees” and “Tying Young Trees” by Joe Connell, UC Farm Advisor, Butte County in the Sacramento Valley Almond News, January 2012 and April 2013, respectively. The more you prune a tree the lower the yield will be and the less you prune the heavier the yield. But this - [Zone Irrigation, Part 2 - Designing a System](https://www.sacvalleyorchards.com/almonds/zone-irrigation-part-2-designing-a-system/) - A good understanding of the soil variability patterns is essential to optimally design and install a zone irrigation system. Rapid, non-intrusive methods of measuring soil electrical conductivity combined with global positioning systems (GPS) are used to map the soil variability patterns and provide waypoints to guide the design and installation. - [Zone Irrigation, Part 1 - Zone Irrigation Concepts](https://www.sacvalleyorchards.com/blog/almonds-blog/zone-irrigation-part-1-zone-irrigation-concepts/) - Variable soils contribute to irregular patterns of crop water stress and in turn more variable crop development and pest problems over the course of a season. One concept to irrigating highly variable soils that is gaining some adoption is zone irrigation. Zone irrigation is being used in some orchard settings in the Sacramento Valley where changes in topography are gradual and variability in soil profile depth, texture, structure, and water-holding capacity exists. - [Navel Orangeworm vs Codling Moth Identification Chart](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/navel-orangeworm-vs-codling-moth-identification-chart/) - [Almond Varieties (Cultivars)](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/almond-varieties-cultivars/) - Adapted from “Almond varieties” by Joseph Connell, UCCE Farm Advisor, Butte County, in the April 2013 Sacramento Valley Almond News. Proper almond variety selection can mean the difference between the commercial success or failure of an orchard. Varieties vary significantly in rootstock compatibility, pollen compatibility, bloom timing, harvest timing, sensitivity to different pests or diseases, ## Pages - [Home Page](https://www.sacvalleyorchards.com/) - Up-to-date orchard-related events, news & articles from UC Cooperative Extension farm advisors from the Sacramento Valley. - [SWP Baseline Calculator Tool](https://www.sacvalleyorchards.com/swp-baseline-calculator-tool/) - [Other Orchard Crops](https://www.sacvalleyorchards.com/other-orchard-crops/) - Cling Peach Kiwifruit - [About Us](https://www.sacvalleyorchards.com/about-us/) - We are a team of University of California Agriculture & Natural Resources Cooperative Extension (UCCE) pomology farm advisors and research associates in the Sacramento Valley. Our goal is to act as a connection between California farmers and university researchers to solve local agricultural problems and deliver practical, science-based information to our communities. The public - [Subscribe](https://www.sacvalleyorchards.com/subscribe/) - [Ag Legacy Symposium - March 2025](https://www.sacvalleyorchards.com/ag-legacy-planning/) - Overview This evening workshop will be held on March 27, 2025 from 5-8 pm in Yuba City to prepare farms, ranches, and agri-businesses, big or small, for the transition to the next generation. The session will cover legal aspects, financial topics, political factors, family dynamics, and provide real life scenarios to consider incorporating into succession - [Other Resources](https://www.sacvalleyorchards.com/other-resources/) - 🆕 Ground squirrel best management practices 🆕 UC Cost & Return Studies Almonds (2024) Walnuts (2022) Prunes (2023) Table Olives (2023) UC IPM Guidelines for almonds, walnuts, prunes, and olives Degree day calculator Chilling and harvest prediction models California Irrigation Management Information System (CIMIS) UC Fruit and Nut Center UC Weed Research and Information Center - [Contact Us](https://www.sacvalleyorchards.com/contact-us/) - [Privacy Policy](https://www.sacvalleyorchards.com/privacy-policy/) - The University of California, Division of Agriculture and Natural Resources (ANR) is committed to promoting and protecting the privacy rights of individuals, as enumerated in Article 1 of the California Constitution, the Information Practices Act of 1977, and other state and federal laws. It is the policy of ANR to limit the collection and safeguard ## Events - [2026 North Sac Valley Olive Day](https://www.sacvalleyorchards.com/event/2026-north-sac-valley-olive-day/) - Attend 2026 North Sac Valley Olive Day for updates on management strategies, current research, laws and regulations, and market conditions for both table and olive oil production - [2026 UCCE Stone Fruit Day](https://www.sacvalleyorchards.com/event/2026-ucce-stone-fruit-day/) - Join us for the 2026 UCCE Stone Fruit Day on March 5th at Kearney REC in Parlier, CA! 2.5 hours DPR CE (Other) - Approved 1 - hour CCA CE - Approved Spanish translation available Lunch Provided If you have not already, please register soon. CLICK HERE TO REGISTER - [Almond Board of California Annual Conference](https://www.sacvalleyorchards.com/event/almond-board-of-california-annual-conference/) - Save the date and join us for the Almond Board of California Annual Conference! December 10-12 in Sacramento. More details to come. - [Sutter-Yuba Walnut Day 2026](https://www.sacvalleyorchards.com/event/sy-walnut-day-2026/) - Save the date and join us for the Sutter-Yuba Walnut Day! Start Topic Speaker 7:45 Welcome Clarissa Reyes 8:00 Laws & Regulatory Updates Sutter & Yuba Ag Commissioners 8:30 Nematode management in a changing regulatory world Andreas Westphal 9:00 Breeding new walnut scions and rootstocks Patrick J. Brown 9:30 New ethephon experiments in Solano and - [South Sacramento Valley Prune Meeting](https://www.sacvalleyorchards.com/event/south-sacramento-valley-prune-meeting-2/) - Join us for the South Sac Valley Prune Meeting! Click flier below to register. - [Nickels Field Day](https://www.sacvalleyorchards.com/event/nickels-field-day-3/) - Save the date and join us for the Nickels Soil Lab Field Day! When: Tuesday, May 19 Where: Green Bay Rd., Arbuckle, CA Topics: Almond and walnut More details to come! - [North Sac Valley Walnut Day](https://www.sacvalleyorchards.com/event/north-sac-valley-walnut-day/) - Save the date and join us for the North Sac Valley Walnut Day! REGISTER HERE OR USE QR CODE BELOW - [North Sac Valley Prune Day](https://www.sacvalleyorchards.com/event/north-sac-valley-prune-day-2/) - Save the date and join us for the North Sac Valley Prune Day! REGISTER HERE OR USE QR CODE BELOW - [2026 UCCE Colusa Grower Almond Meeting](https://www.sacvalleyorchards.com/event/2026-ucce-colusa-grower-almond-meeting/) - Please join us for the Colusa Almond Grower Meeting! - [Fourth Friday: Things from the Field- Red Leaf Blotch in Almonds](https://www.sacvalleyorchards.com/event/fourth-friday-things-from-the-field-red-leaf-blotch-in-almonds/) - CLICK HERE TO REGISTER - [Third Thursday: Spider Mite Control and Management in California Almonds](https://www.sacvalleyorchards.com/event/third-thursday-spider-mite-control-and-management-in-california-almonds/) - Save the date and join us for the Third Thursday: Spider Mite Control and Management in California Almonds ! CLICK HERE TO REGISTER - [Third Thursday: Sacramento Valley Tree Crop IPM Review](https://www.sacvalleyorchards.com/event/sacramento-valley-tree-crop-ipm-review/) - Save the date and join us for the Third Thursday: Sacramento Valley Tree Crop IPM Review ! CLICK HERE TO REGISTER - [Groundwater Management & Recharge Meeting](https://www.sacvalleyorchards.com/event/groundwater-mgmt-recharge-meeting/) - Save the date and join us for a grower-focused information session on groundwater management and recharge! CLICK HERE TO REGISTER - [North Valley Nut Conference](https://www.sacvalleyorchards.com/event/north-valley-nut-conference-2/) - Save the date and join us for the North Valley Nut Conference! January 14th, 2026 7 AM - 12 PM Silver Dollar Fairgrounds, Chico More details to come. - [2026 Principles of Fruit & Nut Tree Growth, Cropping, and Management](https://www.sacvalleyorchards.com/event/2026-principles-of-fruit-nut-tree-growth-cropping-and-management/) - Understanding the fundamentals of tree biology is essential in making sound orchard management and business decisions in the tree fruit and nut industry. However, access to educational courses on basic fruit and nut tree biology, and how it relates to agronomic practices, is limited. Our course incorporates lecture, lab exercises, and field demonstrations to provide - [Yuba/Sutter Spray Safe](https://www.sacvalleyorchards.com/event/yuba-sutter-spray-safe/) - Save the date and join us for the Yuba/Sutter Spray Safe! January 14th in Yuba City. More details to come. - [UC Davis Prune Breeding Summer Field Meeting](https://www.sacvalleyorchards.com/event/uc-davis-prune-breeding-summer-field-meeting-2/) - [Prune Research Tour Part 2](https://www.sacvalleyorchards.com/event/prune-research-tour-part-2/) - Join us for the Prune Research Tour Part 2! - [Third Wednesday: Things from the Field - Prune Tree Killers](https://www.sacvalleyorchards.com/event/third-wednesday-things-from-the-field-prune-tree-killers/) - [Walnut Field Day - Whole Orchard Recycling & Rootstock Demo](https://www.sacvalleyorchards.com/event/walnut-field-day-whole-orchard-recycling-rootstock-demo/) - Join us for a field day! Visit a 5th leaf demonstration walnut orchard featuring Chandler on four clonal rootstocks (RX1, VX211, Vlach, and Grizzly) planted in a field with blocks of whole orchard recycling chips. 1.5 CCA CEUs offered - [Third Tuesday: Things from the Field - North Sac Valley Groundwater and SGMA](https://www.sacvalleyorchards.com/event/north-sac-valley-groundwater-and-sgma/) - Join us for the N. Sac Valley Groundwater and SGMA meeting! When: June 24, 2025 Time: 12 - 2 PM Where: Los Molinos Vet's Hall (7980 Sherwood Blvd, Los Molinos, CA 96055) REGISTER HERE - [Prune Research Tour Part 1](https://www.sacvalleyorchards.com/event/prune-research-tour-part-1/) - Join us for the Prune Research Tour Part 1! When: May 29, 2025 Time: 8 AM - 12:30 PM Where: First Location: Russell Ranch 38°32'30.9"N 121°52'12.1"W 38.541909, -121.870032 Second Location: 38°35'01.9"N 121°57'00.2"W 38.583848, -121.950060 Third Location: 38°34'36.1"N 121°57'08.9"W 38.576680, -121.952458 REGISTER HERE - [Almond Variety Trials: 2025 Field Meeting at CSU, Chico Farm (TAKE-TWO!)](https://www.sacvalleyorchards.com/event/n-regional-almond-variety-trials-walking-tour-round-2/) - Join us for the Almond Variety Trials: 2025 Field Meeting at CSU, Chico Farm (TAKE-TWO!) What: Walking tour of two UC almond variety field trials planted at the Chico State Farm. Varieties under evaluation include Yorizane, Shasta, Independence, Bennett-Hickman, and Pyrenees. When: Wednesday May 28, coffee & check-in 7:30 – 8:00, field event 8:00 – - [Third Thursday: Things from the Field - Walnut Pest Management Considerations 2025](https://www.sacvalleyorchards.com/event/third-thursday-things-from-the-field-walnut-pest-management-considerations-2025/) - May Third Thursday will cover pest management in walnut (applied for 1 hr DPR). Jhalendra Rijal will discuss flatheaded borer and Sudan Gyawaly will discuss pest monitoring and how to use them in your IPM plan. - [Nickels Soil Lab Annual Field Day](https://www.sacvalleyorchards.com/event/nickels-soil-lab-annual-field-day/) - Join us for the Nickels Soil Lab Annual Field Day! When: May 14, 2025 Time: 8:30 AM - 12:15 PM Where: Marine Ave, Arbuckle, CA 95912 Lunch: $20.00 / person with all proceeds benefitting Pierce High School FFA Program. Call 530-458-0570 by May 9th to reserve lunch spot. Mail checks to: Pierce High School Cooperative - [Olive Irrigation Workshop](https://www.sacvalleyorchards.com/event/olive-irrigation-workshop/) - Join us for a Olive Irrigation Workshop! When: May 13, 2025 Time: 9 AM - 2:30 PM Where: Glenn Success Square 131 E. Walker Street, Orland, CA 95963 REGISTER HERE - [Kiwi grower meeting: vine cankers](https://www.sacvalleyorchards.com/event/kiwi-grower-meeting-vine-cankers/) - Grower meeting about kiwi vine cankers on May 1, 2025 from 1-2 PM at UCCE office in Yuba City - [Almond Variety Trials: 2025 Field Meeting](https://www.sacvalleyorchards.com/event/almond-variety-trials-2025-field-meeting/) - Almond Variety Trials: 2025 Field Meeting Luke Milliron, UCCE Orchards Advisor, Butte, Glenn, Tehama Counties What: Walking tour of two UC almond variety field trials planted at the Chico State Farm. Varieties under evaluation include Yorizane, Shasta, Independence, Bennett-Hickman, and Pyrenees. When: Wednesday April 30, 9-11 AM Why: Evaluate the performance of new varieties for - [Walnut Dormancy Field Day](https://www.sacvalleyorchards.com/event/walnut-dormancy-field-day/) - Join us for a Walnut Dormancy Field Day! When: April 11, 2025 Time: 11:30 AM - 1:30 PM Where: HWY 45, 2 miles north of Glenn, between Sidds Rd & Co Road 48 (39.547248, -122.008529) REGISTER HERE - [California Statewide Olive Seminar (Online)](https://www.sacvalleyorchards.com/event/california-statewide-olive-seminar-online/) - California Statewide Olive Seminar, April 4 The online seminar, a series of presentations from 8 a.m. to 1 p.m., is sponsored by the University of California Cooperative Extension and UC Integrated Pest Management Program. 7:55 a.m. Welcome and Introduction - Cindy Kron, UC Cooperative Extension North Coast IPM Advisor 8 a.m. Olive Fruit Fly: - [UC AgExpert Webinars for CEUs](https://www.sacvalleyorchards.com/event/uc-agexpert-webinars-for-ceus/) - Join us this spring for UC IPM webinars tackling various pest management challenges. Expand your knowledge and earn free continuing education units. Register today! - [UCCE Sutter-Yuba Walnut Day](https://www.sacvalleyorchards.com/event/2025-sy-walnut-day/) - UCCE Sutter-Yuba Walnut Day will be at the Veteran's Hall in Yuba City on March 5, 2025 - [Third Thursday: Things from the Field - Managing Burrowing Rodents](https://www.sacvalleyorchards.com/event/third-thursday-things-from-the-field/) - Click here for Roger's presentation slides - [Sac-Solano-Yolo Walnut Meeting](https://www.sacvalleyorchards.com/event/sac-solano-yolo-walnut-meeting/) - Save the date for Sac-Solano-Yolo Walnut Meeting! When: March 12, 2025 Time: 8 AM - 12 PM Where: Woodland Community College, Bldg 800 2300 E. Gibson Rd, Woodland, CA 95776 - [Sac-Solano-Yolo Almond Meeting](https://www.sacvalleyorchards.com/event/sac-solano-yolo-almond-meeting-2/) - Save the date for Sac-Solano-Yolo Almond Meeting! When: March 27, 2025 Time: 1 PM - 5 PM Where: Woodland Community College 2300 E. Gibson Rd., Woodland, CA 95776 Agenda and registration link to follow closer to the date - [Organic Weed Management Meeting](https://www.sacvalleyorchards.com/event/organic-weed-management-meeting/) - Save the date for Organic Weed Management Meeting! When: March 4, 2025 Time: 8 AM - 12:30 PM Where: Woodland Community College Building 800 Community Room 2300 E. Gibson Rd., Woodland, CA 95776 REGISTER HERE - [Almond Board Workshop: Pest Identification](https://www.sacvalleyorchards.com/event/almond-board-workshop-pest-identification/) - Save the date for Almond Board Pest Update! When: March 11, 2025 Time: 9 AM - 11 AM Where: Orland, Glenn Success Conference Center 131 E Walker St, Orland, CA 95963 REGISTER HERE Workshop meant to focus on pest identification and windrow sampling for assessing pest damage at end of growing season. - [Ag Legacy Symposium: Preparing the Farm and Ranch for the Next Generation](https://www.sacvalleyorchards.com/event/ag-legacy-estate-planning/) - Overview This evening symposium will be held on March 27, 2025 from 5-8 pm in Yuba City to prepare farms, ranches, and agri-businesses, big or small, for the transition to the next generation. The session will cover legal aspects, financial topics, political factors, family dynamics, and provide real life scenarios to consider incorporating into succession - [South Sacramento Valley Prune Meeting](https://www.sacvalleyorchards.com/event/south-sacramento-valley-prune-meeting/) - When: February 25, 2025 Time: 8 AM - 12 PM Where: 142A Garden Hwy, Yuba City, CA REGISTER HERE - [Lake County Walnut Update](https://www.sacvalleyorchards.com/event/lake-county-walnut-update/) - 2025 LAKE COUNTY WALNUT UPDATE Tuesday, March 4th, 2025 Scotts Valley Women’s Club, 2298 Hendricks Road, Lakeport, CA 1.0 hour Laws and 1.5 hours Other DPR CEUs Registration Link (Registration is free ): https://surveys.ucanr.edu/survey.cfm?surveynumber=45581 Registration is required for better planning. Breakfast, Refreshments, and Lunch will be provided. CONTACT: Clebson Gonçalves (goncalves@ucanr.edu) - [Third Thursday: Things from the Field - Groundwater and SGMA](https://www.sacvalleyorchards.com/event/third-thursday-things-from-the-field-groundwater-and-sgma/) - Scan QR code to register or CLICK HERE - [North Sacramento Valley Walnut Day](https://www.sacvalleyorchards.com/event/north-sacramento-valley-walnut-day/) - Save the date for the North Sacramento Valley Walnut Day! When: Thursday, March 6, 2025 Time: 7:30 AM - 1 PM Where: Red Bluff Elks Lodge, 355 Gilmore Rd., Red Bluff, CA REGISTER HERE - [Sacramento Valley Pistachio Meeting](https://www.sacvalleyorchards.com/event/sac-solano-yolo-almond-meeting/) - Save the date for Sacramento Valley Pistachio Meeting! When: February 19, 2025 Time: 8 AM - 12 PM Where: Woodland Community College 2300 E. Gibson Rd., Woodland, CA 95776 Agenda and registration link to follow closer to the date - [2025 UCCE Colusa Almond Grower Meeting](https://www.sacvalleyorchards.com/event/2025-ucce-colusa-almond-grower-meeting/) - Save the date for 2025 UCCE Colusa Almond Grower Meeting! When: Tuesday, January 28, 2025 Time: 8 AM - 12:30 PM Where: Arbuckle Golf Club 5918 Hillgate Rd, Arbuckle, CA 95912 - [North Sacramento Olive Day](https://www.sacvalleyorchards.com/event/north-sacramento-olive-day/) - Save the date for the North Sac Olive Day! When: Friday, February 21, 2025 Time: 7:30 AM - 12 PM Where: Glenn Success Square, 131 E. Walker Street, Orland, CA REGISTER HERE - [Sutter-Yuba Peach Day 2025](https://www.sacvalleyorchards.com/event/sutter-yuba-peach-day/) - When: Tuesday Feb 4, 2025 Where: Sutter Co UCCE office, 142A Garden Highway, Yuba City Time: 12:15 - 2:30 PM REGISTER HERE: https://surveys.ucanr.edu/survey.cfm?surveynumber=45390 - [North Sacramento Valley Prune Day](https://www.sacvalleyorchards.com/event/north-sac-valley-prune-day/) - Save the date for 2025 North Sacramento Valley Prune Day: When: Monday, February 3, 2025 Time: 7:30 AM - 1 PM Where: Red Bluff Elk Lodge 355 Gilmore Rd. Red Bluff, CA 96080 REGISTER HERE - [2025 North Valley Nut Conference](https://www.sacvalleyorchards.com/event/2025-north-valley-nut-conference/) - Save the date for 2025 North Valley Nut Conference: When: January 15, 2025 Time: 8 AM - 12 PM Where: Silver Dollar Fairgrounds 2357 Fair St, Chico, CA 95928 7 AM- Registration and Trade Show 8 AM- Nut Production and SGMA: A Panel Discussion 8:30 AM- Butte and - [January Third Thursday: Things from the Field](https://www.sacvalleyorchards.com/event/january-third-thursday-things-from-the-field/) - Third Thursday is a monthly event continuing in 2025 to meet Sac Valley orchard advisors and other industry members in a casual setting and get timely updates on issues we’ve been seeing in the field. The next Third Thursday is: January 16, 12:30-2:30 PM UCCE Sutter-Yuba 142A Garden Hwy, Yuba City, CA Register at this - [Central Valley Winter Cling Peach Meeting](https://www.sacvalleyorchards.com/event/central-valley-winter-cling-peach-meeting/) - Save the Date for Central Valley Cling Peach Meeting! Agenda and more details to follow When: Wednesday Feb 5, 2025 Where: Merced (location TBD) Time: 9 - 11 AM - [2024 Orchard IPM Post-Mortem](https://www.sacvalleyorchards.com/event/2024-orchard-ipm-post-mortem/) - UCCE farm advisors will talk about IPM problems they encountered over the 2024 season and invite others to share their experiences and any significant challenges. Sacramento Valley Orchard Pest Postmortem, 2024 Thursday, November 12, 2024 Rocco's Banquet Hall; 546 Market St, Colusa, CA 95932 9:00 am – 12:00 pm Free event, but please register - [Sacramento Valley Orchard Sanitation Check-up](https://www.sacvalleyorchards.com/event/sacramento-valley-orchard-sanitation-check-up/) - Sacramento Valley Orchard Sanitation Check-up Registration link coming Friday, December 20, 2024 Nickels Soil Lab, Marine Ave (0.75 mi west of Wildwood) 10:00 am – 11:00 am 1.0 hour of PCA CE hours (“other”) requested 1.0 hour of CCA CE (pest management) hours approved 9:45 am ─ Registration/Coffee 10-10:30 am ─ Orchard sanitation - [California Walnut Conference](https://www.sacvalleyorchards.com/event/california-walnut-conference/) - California Walnut Board & Commission and West Coast Nut will host the California Walnut Conference on Jan 9, 2025. Registration details and agenda to come closer to the date - [Prune Short Course](https://www.sacvalleyorchards.com/event/prune-short-course/) - Prune Short Course s designed for Prune Growers and Processors, PCAs, and CCAs. We'll cover everything from how climate change affects prune trees to new varieties and their bearing differences. This course i Make sure to register before October 25, 2024! - [UC Davis Prune Breeding Summer Field Meeting](https://www.sacvalleyorchards.com/event/uc-davis-prune-breeding-summer-field-meeting/) - Join the UC Davis Prune Breeding program for a field tour of experimental varieties at Wolfskill Experimental Station on Friday, Aug 2 - [Third Thursday: Things from the Field (July+Aug)](https://www.sacvalleyorchards.com/event/third-thursday-things-from-the-field-julyaug/) - Third Thursday is a monthly event in 2024 to meet Sac Valley orchard advisors and other industry members in a casual setting and get timely updates on issues we’ve been seeing in the field. The next Third Thursday is scheduled to combined July and August as a field day this month: August 8, 11:30 AM - [North Coast Olive Field Day](https://www.sacvalleyorchards.com/event/north-coast-olive-field-day/) - Please join for the 2nd biennial North Coast Olive Field Day at Long Meadow Ranch. Registration is required and will close on July 23 - [Carpophilus Beetle Online Information Session](https://www.sacvalleyorchards.com/event/carpophilus-beetle-online-information-session/) - We'll be hosting a webinar on July 9 from 3-6pm PST featuring researchers, growers and industry personnel from Australia, who will be sharing their experiences with the ecology, monitoring and management of the newly invasive Carpophilus beetle. See flyer below for more details. Register to attend this seminar using the following link: https://ucr.zoom.us/webinar/register/WN_VQNkKaG5Tyu97IuLz7XN-A - [Third Thursday: Things from the Field (June)](https://www.sacvalleyorchards.com/event/third-thursday-things-from-the-field-june/) - A monthly event in 2024 to meet Sac Valley orchard advisors and other industry members in a casual setting and get timely updates on issues we’ve been seeing in the field. The next Third Thursday is rescheduled to fourth Thursday this month: June 27, 11:00 AM - 12:30 PM UCCE Sutter-Yuba 142A Garden Hwy, Yuba - [Prune Research Field Tour](https://www.sacvalleyorchards.com/event/prune-research-field-tour/) - Learn, network and socialize in commercial orchards. Join the industry and our UCANR and CSU research partners for a field tour on Wednesday and Thursday, May 29th and 30th (including 5 stops, with happy hour and a dinner) and a half day on the 30th (including 2 stops and a lunch)! With itinerary stops planned - [Third Thursdays: Things from the Field (May)](https://www.sacvalleyorchards.com/event/third-thursdays-things-from-the-field-may/) - A monthly event to talk with Sac Valley orchard advisors and other industry members in a casual setting and get timely updates on issues we’ve been seeing in the field. The first hour will feature lunch and a UCCE talk with Q&A on an orchard topic relevant to the time of year. After the talk, - [Nickels Field Day](https://www.sacvalleyorchards.com/event/nickels-field-day-2/) - 8:30 am — Registration Coffee and Donuts provided by Farm Credit Services of Colusa-Glenn, ACA Cycle I: 9:20-10:45 am 1) Frequent fertilizer applications for fertilizer efficiency and orchard health. Patrick Brown, Professor, UC Davis Plant Sciences Department 2) Table olive harvest trial update. Rebecca Wheeler-Dykes; UCCE Orchard Systems/Weed Ecology Advisor; Glenn, Tehama, Colusa Co. 3) - [Moles, Voles and Gophers (UC IPM Webinar)](https://www.sacvalleyorchards.com/event/moles-voles-and-gophers-uc-ipm-webinar/) - This installment of the UC IPM Urban & Community Webinar Series will cover how best to manage burrowing rodents like moles, voles and gophers can wreak havoc in the garden and landscape - [Third Thursdays: Things from the Field - April](https://www.sacvalleyorchards.com/event/april-third-thursdays-things-from-the-field/) - Join on Thursday, April 18 from 1:30 PM- 3:30 PM for free lunch and an open discussion at the UCCE Sutter office in Yuba City! Sac Valley orchard advisors and other industry members will be present to discuss spring irrigation in walnut and what's been going on in the field. - [UCCE Southern Sacramento Valley Walnut Meeting 2024](https://www.sacvalleyorchards.com/event/ucce-southern-sacramento-valley-walnut-meeting-2024/) - Join on Tuesday, March 12th, 2024 for Walnut Day in Woodland! Meeting begins at 8:00 AM and goes until noon. - [March Third Thursdays: Things from the Field](https://www.sacvalleyorchards.com/event/march-third-thursdays-things-from-the-field/) - Join on Thursday, March 21 from 11:30 AM- 1:30 PM for lunch and an open discussion at the UCCE Glenn County office in Orland! Sac Valley orchard advisors and other industry members will be present to discuss Navel Orangeworm and Carpophilus beetle issues and what's been going on in the field. - [2024 Nematology Workshop](https://www.sacvalleyorchards.com/event/2024-nematology-workshop/) - Join on March 26, 2024 from 8:00 AM to 3:30 PM for a Nematology workshop hosted by UCANR Nematology Workgroup at the Kearney Agricultural Research & Extension Center! - [North Valley Nut Conference 2025](https://www.sacvalleyorchards.com/event/north-valley-nut-conference-2025/) - Save the date for the 2025 North Valley Nut Conference! - [2024 UCCE Sacramento Valley Pistachio Meeting](https://www.sacvalleyorchards.com/event/sacramento-valley-pistachio-meeting/) - Join on Wednesday, February 21st, 2024 for the UCCE Sacramento Valley Pistachio Meeting in Woodland to learn about industry updates. - [Third Thursdays: Things from the Field](https://www.sacvalleyorchards.com/event/third-thursdays-things-from-the-field/) - Join on Thursday, February 15th from 11:30 AM- 1:30 PM for lunch and an open discussion at the UCCE Sutter-Yuba office! Sac Valley orchard advisors and other industry members will be present to discuss issues and what's been going on in the field. - [Sutter-Yuba Walnut Day 2024](https://www.sacvalleyorchards.com/event/sutter-yuba-walnut-day-2024/) - Join at Veterans Hall in Yuba on Wednesday, February 28 for Sutter-Yuba Walnut Day 2024. Lunch provided. - [Sutter-Yuba Peach Day 2024](https://www.sacvalleyorchards.com/event/sutter-yuba-peach-day-2024/) - Join on Friday, February 09, 2024 for Sutter-Yuba Peach Day! Updates on disease management, new processing of varieties, fertilization guidelines and more. Lunch provided. Any additional questions can be directed to Clarissa Reyes at clareyes@ucanr.edu - [2024 UCCE Yolo-Solano-Sacramento Almond Meeting](https://www.sacvalleyorchards.com/event/2024-almond-meeting-woodland/) - Join us on Tuesday, January 30th at Norton Hall in Woodland from 1pm-5pm for an almond meeting! - [Quad-County Walnut Institute 2024](https://www.sacvalleyorchards.com/event/quad-county-walnut-institute-2024/) - Join our in-person Quad-County Walnut Institute meeting on February 2nd, 2024 (8am to 2:30pm) at the Robert J. Cabral Ag Center in Stockton. Growers, CCAs, PCAs, and other agricultural professionals who work with California walnuts are encouraged to attend. - [Northern Sacramento Valley Prune Day, 2024](https://www.sacvalleyorchards.com/event/northern-sacramento-valley-prune-day-2024/) - Join on Tuesday, February 01, 2024 for the Northern Sacramento Valley Prune Day! - [2024 UCCE Colusa Region Almond Grower Meeting](https://www.sacvalleyorchards.com/event/2024-almond-meeting-arbuckle/) - Join us at the Arbuckle Golf Club on the morning of Tuesday, January 30th in Arbuckle from 8AM-12PM for the UCCE Colusa Region Almond Grower Region Meeting! - [UCCE North Sacramento Valley Olive Day 2024](https://www.sacvalleyorchards.com/event/northern-sacramento-valley-olive-day-2024/) - Join UC Cooperative Extension on Tuesday, February 20th, 2024 from 8:00 AM to noon for North Sac Valley Olive Day! Hear updates on management strategies, current research, changes to laws and regulations, and market conditions. Information pertains to both table and oil olive production. - [Northern Sac Valley Walnut Day 2024](https://www.sacvalleyorchards.com/event/northern-sac-valley-walnut-day-2024/) - Save the date for Thursday, February 29th, 2024 for Northern Sac Valley Walnut Day! - [North Valley Nut Conference 2024](https://www.sacvalleyorchards.com/event/north-valley-nut-conference-2024/) - Join on Wednesday, January 31st, for the 2024 North Valley Nut Conference in Chico! - [First Third Thursday Things from the Field Lunch](https://www.sacvalleyorchards.com/event/third-thursday-things-in-the-field-lunch-2024/) - Join us for our first North Sac Valley 'Third Thursday Things from the Field on Thursday, January 18, 2024!! Hear updates on orchard management strategies for upcoming challenges and share what you’ve been seeing in the field. Lunch in Orland, CA. - [Sac-Solano-Yolo Walnut Day 2024](https://www.sacvalleyorchards.com/event/sac-solano-yolo-walnut-day-2024/) - Save the date for Tuesday, March 12th, 2024 for Walnut Day! - [Organic Agriculture Workshop](https://www.sacvalleyorchards.com/event/organic-agriculture-workshop/) - Register for the Organic Agriculture Workshop to take place in-person on November 7th, 2023 from 8:30-1:30 at the UCCE Sutter-Yuba Office. - [UC AG Expert Talk: The Blight Phase of Botryosphaeria Disease of Pistachio and Walnut and its Management](https://www.sacvalleyorchards.com/event/uc-ag-expert-talk-the-blight-phase-of-botryosphaeria-disease-of-pistachio-and-walnut-and-its-management/) - Join on Wednesday, October 25th at 3:00 PM where Dr. Themis J. Michailides will speak on the blight phase of Botryosphaeria disease of pistachio and walnut and its management. - [Pomegranate and Citrus HLB Extension Meeting](https://www.sacvalleyorchards.com/event/pomegranate-and-citrus-hlb-extension-meeting/) - Join on Tuesday, October 31st at 8:00 AM for the pomegranate and citrus extension meeting at UCD! - [2023 Field Day: Nematode Management in Almond](https://www.sacvalleyorchards.com/event/2023-field-day-nematode-management-in-almond/) - Join Dr. Westphal at the Kearney Agricultural Research & Extension Center on Nov. 29, 2023 for almond field day from 8:00 AM-12:00 PM. - [2023 Field Day: Nematode Management in Walnut](https://www.sacvalleyorchards.com/event/2023-field-day-nematode-management-in-walnut/) - Join Dr. Westphal at the Kearney Agricultural Research & Extension Center on Nov. 28, 2023 for walnut field day! - [South Sacramento Valley Prune Day, 2024](https://www.sacvalleyorchards.com/event/south-sacramento-valley-prune-day-2024/) - Join on Tuesday, February 27th, 2024 for the South Sacramento Valley Prune Day! - [2024 North Valley Nut Conference](https://www.sacvalleyorchards.com/event/2024-north-valley-nut-conference/) - Join on Wednesday, January 31, 2024 from 7:00 AM to noon for the North Valley Nut Conference! - [Colusa Winter Almond Meeting, 2024](https://www.sacvalleyorchards.com/event/colusa-winter-almond-meeting-2024/) - Join on Tuesday, January 30th for the Colusa Winter Almond Meeting, 2024! - [Nematodes in Orchards Following Walnuts – Field Day 2023](https://www.sacvalleyorchards.com/event/nematodes-in-orchards-following-walnuts-field-day-aug-17/) - Join on Thursday, August 17 where Andreas Westphal has organized a walnut nematode field visit at one of his test sites near Escalon. See and hear about recent progress in nematode control treatments. - [Calibration Safety & Compliance Training](https://www.sacvalleyorchards.com/event/calibration-safety-compliance-training/) - Join UC ANR and AgSafe, hosted with the Almond Board of California, for practical calibration training, how to prepare and calibrate air blast sprayers on Tuesday, June 27, 2023. - [Nickels Soil Lab Annual Field Day-2023](https://www.sacvalleyorchards.com/event/nickels-field-day-2023/) - Join on Wednesday, May 18, 2023, for Nickels Field Day! 1.5 hr PCA CE credits requested; 2.0 hours CCA CE credits (0.5 hr S&W Man, 1.5 hr IPM) requested. - [Cover Crops in Orchards Demonstration and Workshop](https://www.sacvalleyorchards.com/event/cover-crops-in-orchards-demonstration-and-workshop/) - Join on Thursday, May 11 for a walking tour of a 5-year cover crop trial with almonds. Learn about American Farmland Trust's cover crop trials. Hear the pros and cons of cover crops. See how cover crops impact soil health and carbon sequestration. - [Soil Health and Sustainability Field Day Whole Almond Orchard Recycling](https://www.sacvalleyorchards.com/event/soil-health-and-sustainability-field-day-whole-almond-orchard-recycling/) - Join on Thursday, May 18 2023 for Soil Health and Sustainability Field Day: Whole Almond Orchard Recycling. RSVP by May 11th, 2023- Zach Fowler, email: Office@fowlerbrosinc.com - [Fundamentals of Irrigation Scheduling- Orland](https://www.sacvalleyorchards.com/event/fundamentals-of-irrigation-scheduling-orland/) - On April 20th, 2023, join ABC, UCCCE and industry professionals to learn the fundamental principles of creating an irrigation schedule that leverages evapotranspiration data, understand approaches and tools to monitor soil moisture, and what current opportunities and incentives are available from PGE&E. - [UCCE Southern Sacramento Valley Walnut Meeting- 2023](https://www.sacvalleyorchards.com/event/ucce-southern-sacramento-valley-walnut-meeting-2023/) - Join on March 22, 2023 for the Southern Sacramento Valley Walnut Meeting at Norton Hall in Woodland. - [2023 UCCE Souther Sacramento Valley Walnut Meeting](https://www.sacvalleyorchards.com/event/2023-ucce-souther-sacramento-valley-walnut-meeting/) - Join on Wednesday March 22, 2023 in Woodland for updates on laws and regulations, dormancy breaker research, weed management, and more. - [2023 UCCE Sacramento Valley Pistachio Meeting](https://www.sacvalleyorchards.com/event/2023-ucce-sacramento-valley-pistachio-meeting/) - Please join on Wednesday, March 15 2023 for information on training young trees, updates on laws and regulations, NOW management, and more! Hear from advisors Bruce Laminen, Molly Mathews, Houston Wilson, Themis Michailides, Phoebe Gordon, and Mae Cucumber. - [2023 South Valley Prune Meeting](https://www.sacvalleyorchards.com/event/south-valley-prune-meeting/) - Save the date! The South Valley Prune Meeting will be taking place Wednesday, February 22, 2023. More details to follow. - [Vertebrate Pest Council Meeting March](https://www.sacvalleyorchards.com/event/vertebrate-pest-council-meeting-march/) - Join on Thursday, March 02, and learn the latest trends and concepts for wildlife and rodent management. This off-cycle seminar covers rat trapping, tree squirrels, wildlife disease and more. Includes breakfast & lunch. - [Nickels Field Day May 18 2023](https://www.sacvalleyorchards.com/event/nickels-field-day-may-18-2023/) - Join on Thursday, May 18, 2023 for Nickels Field Day in Arbuckle. - [Tehama Walnut Day- 2023](https://www.sacvalleyorchards.com/event/tehama-walnut-meeting/) - Join on March 02, 2023 for the Tehama Walnut Meeting at Red Bluff Elks Lodge. Registration deadline is Wednesday, February 22. - [Tehama Prune Day 2023](https://www.sacvalleyorchards.com/event/north-valley-prune-meeting/) - Join on Thursday, February 23, 2023 for the North Valley Prune Meeting at Red Bluff Elks Lodge. - [2023 UCCE Southern Sacramento Valley Almond Grower Meeting- Arbuckle](https://www.sacvalleyorchards.com/event/2023-ucce-sacramento-valley-almond-grower-meeting/) - Please join Sacramento Valley advisors in Arbuckle the morning of Wednesday, January 18, 2023 for presentations on rootstock selection, tree irrigation and stress, and other management decisions in lean times. If unable to make it, the same presentation will be made in Woodland in the afternoon. - [Cover Cropping in Conventional Orchards and Vineyards: Arbuckle Area Tour](https://www.sacvalleyorchards.com/event/cover-cropping-in-conventional-orchards-and-vineyards-arbuckle-area-tour/) - Please join UC SAREP on Wednesday, March 08, 2023 in touring orchards and vineyard operations that are growing cover crops. Participants will visit two conventional farms in the Arbuckle area that are integrating cover crops into their orchard and vineyard systems. - [Grazing Cover Crops in Orchards and Vineyards: Capay Valley Tour](https://www.sacvalleyorchards.com/event/grazing-cover-crops-in-orchards-and-vineyards-capay-valley-tour/) - Please join UC SAREP on Wednesday, February 08, 2023 in touring three organic farms in the Capay Valley that are integrating cover crops and grazing into their orchard and vineyard systems. - [North Valley Nut Conference - Silver Dollar Fairgrounds](https://www.sacvalleyorchards.com/event/north-valley-nut-conference-silver-dollar-fairgrounds/) - Join on Thursday, January 19, 2023 for the North Valley Nut Conference where advisors will discuss navel orangeworm, irrigation strategies, walnut mold management, and phytophthora. There will be a hosted lunch with a talk on pollinator health management. - [2023 UCCE Southern Sacramento Valley Almond Grower Meeting- Woodland](https://www.sacvalleyorchards.com/event/2023-ucce-southern-sacramento-valley-almond-grower-meeting-woodland/) - Please join Sacramento Valley advisors in Woodland the afternoon of Wednesday, January 18, 2023 for presentations on rootstock selection, tree irrigation and stress, and other management decisions in lean times. If unable to make it, the same presentation will be made in Arbuckle in the morning. - [2023 Principles of Fruit & Nut Tree Growth, Cropping & Management](https://www.sacvalleyorchards.com/event/2023-principles-of-fruit-nut-tree-growth-cropping-management/) - Understanding the fundamentals of tree biology is essential to making sound orchard management and business decisions in the tree fruit and nut industry. Our course incorporates lectures and field demonstrations to provide information on all aspects of basic plant biology and the relationship between plant biology and nuts and fruit orchard management. - [Webinar: Practical Canker Management in Almond and Prune ](https://www.sacvalleyorchards.com/event/webinar-practical-canker-management-in-almond-and-prune/) - Join on Thursday, September 29 from 9 – 10:30 AM PST for a webinar with UC plant pathologists Florent Trouillas and Themis Michailides on the latest best management practices for almond and prune cankers. - [Bios: Regenerative Farming Practices at Handy Farms](https://www.sacvalleyorchards.com/event/bios-regenerative-farming-practices-at-handy-farms/) - Join on Friday, April 19, 2022 (9-12:00 PM) to learn about farmer and research perspectives on the opportunities and challenges of farming a small-scale regenerative walnut orchard with a whole-systems approach. - [Orchard-livestock integration Webinar](https://www.sacvalleyorchards.com/event/orchard-livestock-integration-webinar/) - Join on Wednesday, July 27 for a live Webinar on livestock integrated orchard systems in California. Learn about research and grower experiences of benefits and challenges of grazing in orchard systems. - [Contract Grazing For livestock integrated cropping systems Webinar](https://www.sacvalleyorchards.com/event/contract-grazing-for-livestock-integrated-cropping-systems-webinar/) - Join on Monday, August 16 for a live webinar on contract grazing for livestock integrated cropping systems. Learn the ins and outs of contracting a sheep or other livestock operation to graze in your orchard or vineyard. - [Advances in Pistachio Water Management Workshop](https://www.sacvalleyorchards.com/event/advances-in-pistachio-water-management-workshop/) - Join on July 7, 2022UC Nut Crops Advisor Catherine Mae Culumber, Irrigation Specialists Daniele Zaccaria and Khaled Bali, Irrigation Advisor Blake Sanden, Professional Researcher Elia Scudiero, and other University of California experts in this in-person Water Management Workshop at the International Agri-Center in Tulare, CA to learn about the latest research and advances in Pistachio Water Management and Irrigation. - [UC Davis Prune Breeding Program Summer Field Meeting](https://www.sacvalleyorchards.com/event/2022-uc-davis-prune-breeding-program-summer-field-meeting/) - Join on Thursday, August 4th at 9:30am for a tour of the UC Davis selection blocks and see the new, promising cultivars with fruit on the trees! - [Almond Variety Trial & Irrigation Management Demonstration](https://www.sacvalleyorchards.com/event/almond-variety-trial-irrigation-management-demonstration/) - Join on Thursday, June 23, 2022 for an Irrigation Management demo 8:30-10:30 AM at CSU Chico University Farm. There will be a variety trial tour, pressure chamber demonstration, and new irrigation management technology discussion. - [Biologically Integrated Orchard Systems (BIOS)](https://www.sacvalleyorchards.com/event/biologically-integrated-orchard-systems-bios/) - Join on June 16, 2022, 9-12PM for a demonstration of predatory mite release, use of predator attractants, and use of a roller crimper on cover crop. There will also be demonstrations on predatory insect sampling, ID, and how to best utilize UC IPM online resources. - [Sutter County Walnut Field Day 2022](https://www.sacvalleyorchards.com/event/walnut-field-day-2022/) - Sutter County Walnut Field meeting Tuesday June 07, 2022 8:30 AM- Growth and yield performance of clonal ‘Paradox’ walnut rootstocks plus a hands-on workshop: Using a Pressure Chamber for Irrigation Scheduling. - [Glenn County Walnut Field Day 2022](https://www.sacvalleyorchards.com/event/glenn-county-walnut-field-day-2022/) - Join Glenn County Walnut Field Day on June 09, 2022, from 8:30-11:30 AM. Growth and Yield Performance of Clonal ‘Paradox’ Walnut Rootstocks plus Hands-on Workshop: Using a Pressure Chamber for Irrigation Scheduling. - [North Valley Nut Conference](https://www.sacvalleyorchards.com/event/north-valley-nut-conference/) - Wednesday June 08, 2022, 7AM-12PM. CE credits available for DPR, CCA, and CDFA. Brought to you by West Coast Nut. - [Nickels Soil Lab Annual Field Day 2022](https://www.sacvalleyorchards.com/event/nickels-soil-lab-annual-field-day-2022/) - Join on Tuesday, May 10, 2022 at Green Bay Rd. in Arbuckle. Followed by a BBQ tri-tip lunch supporting Pierce High School FFA's program. Guest lunch time speaker: Jerry Brown, Executive Director, Sites JPA. - [UCCE Southern Sac Valley Prune Day](https://www.sacvalleyorchards.com/event/so-sac-valley-prune-day-2022/) - Topics to include cytospora, hedging, varieties and rootstocks, irrigation and Laws & Regs - [Airblast 2022: Spray Application and Modeling Conference](https://www.sacvalleyorchards.com/event/airblast-2022/) - A 3-day conference covering airblast pesticide spray application practices in orchards and vineyards, decision support tools for planning and evaluating spray applications, and drift modeling support for pesticide regulatory practices. Participants will gain a holistic view to better understand ongoing partnerships between academia, industry, and the regulatory community towards better stewardship of pesticides. It's gonna be a blast. - [Tehama County UCCE Walnut Day](https://www.sacvalleyorchards.com/event/tehama-county-walnut-day-2022/) - Topics to include walnut blight management, rootstock selection, irrigation, weed management, and Laws & Regs. - [UCCE Virtual Statewide Walnut Meeting](https://www.sacvalleyorchards.com/event/ucce-virtual-statewide-walnut_2022/) - Save the date for February 22-23, 2022 for the UCCE Virtual Statewide Walnut Meeting! - [Sacramento Valley Cover Crop Tour](https://www.sacvalleyorchards.com/event/sac-valley-cover-crop-tour-2022/) - Join us for a tour of several cover crop sites in the Sacramento Valley including orchards and annual crop fields. Cover crop species, cultivars and mixes including legumes, grasses and brassicas will be showcased. - [2022 Principles of Fruit & Nut Tree Growth, Cropping & Management](https://www.sacvalleyorchards.com/event/2022-principles/) - Understanding the fundamentals of tree biology is essential to making sound orchard management and business decisions in the tree fruit and nut industry. Our course incorporates lectures and field demonstrations to provide information on all aspects of basic plant biology and the relationship between plant biology and nuts and fruit orchard management. - [Nematode Management Field Day in Almonds](https://www.sacvalleyorchards.com/event/nematode-management-field-day-in-almonds/) - Come to the Kearney Agricultural Research and Extension Center to learn about nematode management in almonds! - [Nematode Management Field Day in Walnuts](https://www.sacvalleyorchards.com/event/nematode-management-field-day-in-walnuts/) - Come to the Kearney Agricultural Research and Extension Center to learn about nematode management in walnuts! - [UC Nitrogen Management Course](https://www.sacvalleyorchards.com/event/uc-nitrogen-management-course/) - Are you interested in learning more about Nitrogen Management? Are you a Certified Crop Advisor seeking Continuing Education Units and/or preparing for the new California Nitrogen Specialty Exam? Have your grower clientele asked you if you are eligible to sign off on a Nitrogen Management Plan? - [2021 Avocado Production Course](https://www.sacvalleyorchards.com/event/2021-avocado-production-course/) - Join this course to learn about avocado physiology, field establishment, plant nutrition, cover crops, irrigation management, pest and disease management, postharvest management, and more! - [UC Walnut Freeze Webinar Panel](https://www.sacvalleyorchards.com/event/uc-walnut-freeze-webinar-panel/) - Sudden autumn freeze events have damaged walnut orchards in the Central Valley in 2018, 2019, and 2020. On November 4th, 2021 from 4:00-5:30 PM (PST) a panel of UC experts and growers will discuss lessons learned from these past freeze events and how to prepare for the next sudden autumn freeze. - [CDFA HSP and SWEEP Grant Application Workshop](https://www.sacvalleyorchards.com/event/cdfa-hsp-and-sweep-grant-application-workshop/) - FREE workshop for hands-on grant application assistance. - [Sutter-Yuba-Colusa UCCE Special Grower IPM Meeting](https://www.sacvalleyorchards.com/event/sutter-yuba-colusa-ucce-special-grower-ipm-meeting/) - Come to this in-person or online meeting to get pest management information updates. Continuing education units available. - [Sacramento Valley Tree Crop IPM Webinar](https://www.sacvalleyorchards.com/event/sacramento-valley-tree-crop-ipm-webinar/) - Attend this event for discussions on pest and disease issues including NOW management, mites management, wood cankers and other pests. - [Take Our Survey on Walnut Freeze Damage](https://www.sacvalleyorchards.com/event/take-our-survey-on-walnut-freeze-damage/) - You are invited to participate in this survey provided by University of California Cooperative Extension (UCCE) regarding freeze damage in walnuts. - [Vertebrate Pest Council Virtual Workshop Series](https://www.sacvalleyorchards.com/event/vertebrate-pest-council-virtual-workshop-series/) - Don't miss this "virtual" opportunity to learn about methodologies and concepts involving human-wildlife conflicts and vertebrate pest problems. - [UC Davis Prune Breeding Program 2021 Summer Field Meeting](https://www.sacvalleyorchards.com/event/uc-davis-prune-breeding-program-2021-summer-field-meeting/) - You are invited to attend a meeting that highlights the new cultivars available from the University’s prune breeding program. - [Almond Boron Rootstock Field Day](https://www.sacvalleyorchards.com/event/almond-boron-rootstock-field-day/) - Thinking about developing a new almond orchard in a high boron setting? Come join UCCE Orchard Advisor Kat Jarvis-Shean & UC Davis Professor Patrick Brown to see with your own eyes nine different rootstock options and talk through the ten years of data we've gathered to evaluate their merits in high-boron conditions. - [Drone Camp 2021](https://www.sacvalleyorchards.com/event/drone-camp-2021/) - Drones are an increasingly useful tool to examine issues like orchard health and water stress. This is a great chance for PCAs, crop consultants and large orchard managers to increase their skills with this emerging technology. - [Citrus Production Course](https://www.sacvalleyorchards.com/event/citrus-production-course/) - Course topics include: citrus physiology, phenology, nematodes, nutrition, weed management,pest management, irrigation, weather, harvest, diseases, and more - [Nickels Soil Lab Annual Field Day 2021](https://www.sacvalleyorchards.com/event/nickels-soil-lab-annual-field-day-2021/) - The annual Nickels Soils Laboratory Field Day will be in person this year. Topics of discussion include whole orchard recycling (WOR), planting options, and young orchard management. - [Fruit Orchard Management Workshop](https://www.sacvalleyorchards.com/event/fruit-orchard-management-workshop/) - Attend this workshop to learn about topics relating to fruit orchard management including nutrient management, irrigation management, and pest and disease management. - [Turning Lab Reports Into Action](https://www.sacvalleyorchards.com/event/turning-lab-reports-into-action/) - Do you want to learn more about reading soil, water, and plant tissue reports? Join us to learn more about the subject. - [Airblast: Optimizing Canopy Sprayers](https://www.sacvalleyorchards.com/event/airblast/) - Featuring recognized experts hailing from the U.S. and Canada, this unique nationally broadcast workshop, the first of its kind, aims to provide participants the knowledge and insight needed to assess and improve their own spray operations. - [Field Rodents- Vertebrate Pest Council Virtual Workshop](https://www.sacvalleyorchards.com/event/field-rodents-workshop/) - Don’t miss this virtual opportunity to learn about methodologies and concepts involving human-wildlife conflicts and vertebrate pest problems. - [Virtual UCCE Statewide Prune Day](https://www.sacvalleyorchards.com/event/prune-day-2021/) - Virtual UCCE Statewide Prune Day Wednesday February 24, 2021 Held via Zoom Register here: Virtual UCCE Statewide Prune Day Registration - February 24 (ucanr.edu) Agenda: 8:30 Update on Laws and Regulations Butte County Ag Commissioner’s Office. 9:00 Update on New UC Davis Prune Cultivars Sarah Castro, UC Davis Department of Plant Sciences 9:30 Cytospora Canker - [California Cling Peach Day](https://www.sacvalleyorchards.com/event/cling-peach-2021/) - Attend to hear presentations on fruit and leaf diseases, new varieties, tree spacing research, Brown Marmorated Stink Bug, and mechanical harvesting trials. CEUs have been applied for. - [Virtual UCCE Statewide Walnut Day](https://www.sacvalleyorchards.com/event/virtual-walnut-day/) - UCCE Virtual Walnut Series February 16 and 17, 2021 | 9:00 AM-12:00 PM Pending Continuing Education Credits DPR - 3.0 hrs "Other" CURES - 0.5 hrs Nitrogen CCA - 3.0 Crop, 0.5 Soil and Water, 0.5 Nutrient, 0.5 Professional Development, 2.0 IPM REGISTER HERE Agenda - Tuesday, February 16 9:00 AM - Opening Remarks and - [2021 Principles of Fruit and Nut Tree Growth, Cropping and Management](https://www.sacvalleyorchards.com/event/2021-principles/) - Understanding the fundamentals of tree biology is essential in making sound orchard management and business decisions in the tree fruit and nut industry. Our course provides information on all aspects of basic plant biology and the relationship between plant biology and nuts and fruit orchard management, through five days of instruction and question and answer sessions with our instructors. - [2021 UCCE Sacramento Valley Almond Grower Meeting](https://www.sacvalleyorchards.com/event/2021-sac-valley-almond/) - 2021 UCCE Sacramento Valley Almond Grower Meeting January 20, 2021 1:00-4:45PM Zoom Webinar 2.5 hrs of CE hours (“other”) requested 3.5 hours of CCA CE hours requested (2.5 PM, 0.5 SWM, and 0.5 CM) Agenda 1:00 PM Managing bacterial and fungal pathogens in almond leaves and nuts Jim Adaskaveg, UC Riverside 1:45 PM Canker diseases - [Virtual 2021 Statewide Pistachio Day](https://www.sacvalleyorchards.com/event/2021-state-pistachio-day/) - Pistachio Day delivers the latest research-based production practices to prospective or current growers, production managers, and pest control consultants so they are better able to achieve their pistachio growing goals - [Virtual Meeting: UC Davis Prune Cultivar Development Program](https://www.sacvalleyorchards.com/event/prune-development-2020/) - Join the UC Davis Prune Cultivar Development Program for an update on variety development. - [Establishing Nut Crop Orchards Webinar Series #3 of 3 - August 12](https://www.sacvalleyorchards.com/event/establishing-webinar-3-of-3/) - Register today to learn about Establishing Nut Crop Orchards from experts with the University of California and USDA. Different topics will be presented during each session. - [Establishing Nut Crop Orchards Webinar Series #2 of 3 - August 5](https://www.sacvalleyorchards.com/event/establishing-webinar-2-of-3/) - Register today to learn about Establishing Nut Crop Orchards from experts with the University of California and USDA. Different topics will be presented during each session. - [Establishing Nut Crop Orchards Webinar Series #1 of 3 - July 29](https://www.sacvalleyorchards.com/event/establishing-webinar-1-of-3/) - Register today to learn about Establishing Nut Crop Orchards from experts with the University of California and USDA. Different topics will be presented during each session. - [Pruning prunes: Long pruning during tree training](https://www.sacvalleyorchards.com/event/prunes-long-pruning-training/) - During this meeting we will discuss the UC research and grower experience with long pruning of prune trees during orchard establishment. Luke Milliron and Franz Niederholzer will present the UC research. Joe Turkovich and Erick Nielsen will present their innovative approaches to tree training from the grower perspective and then we will open it up to questions and discussion. - [VIRTUAL MEETING Part 5: Wrap-Up - Crop ET: The Gateway to Advanced Water Management](https://www.sacvalleyorchards.com/event/et-wrap-up/) - Join Allan Fulton, UC Irrigation and Water Resources Advisor, for this interactive learning session to discuss how to use weekly crop water use reports, pulling together the lessons of the last four webinars. - [Webinario en Español: Cómo Leer Etiquetas de Pesticidas para Hacer Aplicaciones Seguras](https://www.sacvalleyorchards.com/event/webinarios-en-espanol-leer-etiquetas-de-pesticidas/) - Identifique y comprenda los requisitos de la etiqueta para asegurar la seguridad del manipulador de pesticidas, otros empleados y espectadores. Es necesario registrarse antes del webinario. Registrarse aquí: https://ucanr.edu/survey/survey.cfm?surveynumber=29992. Comuníquese con pesticidesafety@ucanr.edu para más información o encuentra más información a http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinario en Español: Mejores prácticas para mantener los pesticidas fuera del agua](https://www.sacvalleyorchards.com/event/webinario-en-espanol-pesticidas-fuera-del-agua/) - Cómo evitar la contaminación del agua subterránea y superficial al hacer aplicaciones de pesticidas. Es necesario registrarse antes del webinario. Registrarse aquí: https://ucanr.edu/survey/survey.cfm?surveynumber=29992. Comuníquese con pesticidesafety@ucanr.edu para más información o encuentra más información a http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinar: Label Reading (English)](https://www.sacvalleyorchards.com/event/webinar-label-reading/) - Identify and understand label requirements that ensure safety for the pesticide handler, other employees, and bystanders. You must pre-register for this webinar. To register, visit https://ucanr.edu/survey/survey.cfm?surveynumber=29992. If you have questions about this event, please contact pesticidesafety@ucanr.edu or find more information at http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinar: Pesticides in Water (English)](https://www.sacvalleyorchards.com/event/webinar-pesticides-in-water/) - What you can do to prevent contamination of ground and surface water when making pesticide applications. You must pre-register for this webinar. To register, visit https://ucanr.edu/survey/survey.cfm?surveynumber=29992. If you have questions about this event, please contact pesticidesafety@ucanr.edu or find more information at http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinario en Español: Protección Respiratoria](https://www.sacvalleyorchards.com/event/webinario-proteccion-respiratoria/) - Fundamentales de la protección respiratoria en California y cómo continuar protegiéndose cuando no se puede conseguir algo. Es necesario registrarse antes del webinario. Registrarse aquí: https://ucanr.edu/survey/survey.cfm?surveynumber=29992. Comuníquese con pesticidesafety@ucanr.edu para más información o encuentra más información a http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinario en Español: PPE y COVID](https://www.sacvalleyorchards.com/event/webinario-ppe-y-covid/) - Fundamentales de la selección y el uso adecuado del equipo de protección personal (PPE) en California y cómo seleccionar el PPE cuando no se puede conseguir algo. Es necesario registrarse antes del webinario. Registrarse aquí: https://ucanr.edu/survey/survey.cfm?surveynumber=29992. Comuníquese con pesticidesafety@ucanr.edu para más información, o encuentra más información a http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinar: PPE and COVID-19 (English)](https://www.sacvalleyorchards.com/event/webinar-ppe-and-covid-19-english/) - Foundations of proper selection and use of personal protective equipment (PPE) in California and how to select replacement PPE when regular supplies are low. You must pre-register for this webinar. To register, visit https://ucanr.edu/survey/survey.cfm?surveynumber=29992. If you have questions about this event, please contact pesticidesafety@ucanr.edu or find more information at http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [Webinar: Respiratory Protection (English)](https://www.sacvalleyorchards.com/event/webinar-respiratory-protection-english/) - Fundamentals of respiratory protection in California and how to continue to protect yourself when respirator supplies are low. You must pre-register for this webinar. To register, visit https://ucanr.edu/survey/survey.cfm?surveynumber=29992. If you have questions about this event, please contact pesticidesafety@ucanr.edu or find more information at http://ipm.ucanr.edu/IPMPROJECT/workshops.html. - [VIRTUAL MEETING Part 4: Using Crop ET Reports in Young Developing Orchards](https://www.sacvalleyorchards.com/event/et-in-young-orchards/) - Join Allan Fulton, UC Irrigation and Water Resources Advisor, for this interactive learning session to discuss how to use weekly crop water use reports, with young trees in mind. - [VIRTUAL MEETING Part 3: Using Crop ET Reports From a Tree Water Status Perspective](https://www.sacvalleyorchards.com/event/virtual-meeting-part-3-using-crop-et-reports-from-a-tree-water-status-perspective/) - Join Allan Fulton, UC Irrigation and Water Resources Advisor, for this interactive learning session to discuss how to use weekly crop water use reports, with tree water status in mind. - [VIRTUAL MEETING PART 2: Using Crop ET Reports from a Soils Perspective.](https://www.sacvalleyorchards.com/event/virtual-meeting-part-2-using-crop-et-reports-from-a-soils-perspective/) - Please join Allan Fulton, UC Irrigation and Water Resources Advisor, for this interactive learning session to discuss how to use weekly crop water use reports, with soil water storage in mind. - [UCCE Working Remotely](https://www.sacvalleyorchards.com/event/working-remotely/) - Given the State of California's shelter-in-place order to reduce the spread of COVID-19, all UC Cooperative Extension offices are now working remotely. We are still available remotely to answer your questions and address needs during this unprecedented situation. - [UCCE Yolo-Solano-Sacramento Walnut Meeting](https://www.sacvalleyorchards.com/event/ucce-yolo-solano-sacramento-walnut-meeting/) - UCCE Yolo-Solano-Sacramento Walnut Meeting - Woodland Community & Senior Center, 2001 East St, Woodland, CA, Wednesday, March 4th, 8:00 AM - 12:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [UCCE Sutter-Yuba-Colusa Walnut Day](https://www.sacvalleyorchards.com/event/sutter-yuba-colusa-walnut-day-4/) - Sutter-Yuba-Colusa Walnut Day: Veterans Memorial Building, 1424 Veterans Memorial Circle, Yuba City, February 26 or 27 - To be determined Discussion Topics: Panel discussions, unpruned/unheaded walnut training systems and clonal walnut roostocks. Continuing Education Credits - To Be Announced - [UCCE Sac Valley Pistachio Day](https://www.sacvalleyorchards.com/event/ucce-sac-valley-pistachio-day/) - UCCE Sac Valley Pistachio Day - UCCE Yolo Office, 70 Cottonwood St, Woodland, CA, Friday, February 28th, 8:00 AM - 12:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [UCCE Nothern Sac Valley Prune Meeting](https://www.sacvalleyorchards.com/event/ucce-nothern-sac-valley-prune-meeting/) - UCCE Nothern Sac Valley Prune Meeting - 355 Gilmore Rd, Red Bluff, Friday, February 21st, 8:00 AM - 1:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [Airblast Sprayer Calibration Training](https://www.sacvalleyorchards.com/event/airblast-sprayer-calibration-training-2/) - Airblast Sprayer Calibration Training including sprayer calibration, spray coverage, drift management, and safe spraying. Personal protective equipment will be provided to attendees. Cost includes refreshments, coffee, and lunch. - [UCCE Sacramento Valley Cling Peach Day](https://www.sacvalleyorchards.com/event/ucce-sacramento-valley-cling-peach-day/) - UCCE Sacramento Valley Cling Peach Day - 142 Garden Hwy, Yuba City, Tuesday, February 4th Topics – Research updates, Cling Peach Board updates, Continuing Education Credits – To Be Announced - [UCCE Tehama Walnut Meeting](https://www.sacvalleyorchards.com/event/ucce-tehama-walnut-meeting/) - UCCE Tehama Walnut Meeting - 355 Gilmore Rd, Red Bluff, Friday, February 7th, 8:00 AM - 1:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [UCCE Northern Sacramento Valley Almond & Walnut Meeting](https://www.sacvalleyorchards.com/event/ucce-northern-sacramento-valley-almond-walnut-meeting/) - UCCE Northern Sacramento Valley Almond & Walnut Meeting - 221 E. Yolo St, Orland, Tuesday, January 21st, 8:00 AM - 1:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [Airblast Sprayer Calibration Training](https://www.sacvalleyorchards.com/event/airblast-sprayer-calibration-training/) - Join us for this all day, hands-on program for people who make on-farm decisions regarding airblast spraying. This includes farm owners, managers, foremen, and pest control advisors. Attendees will receive training on basic sprayer calibration, spray coverage, drift management and safe spraying. Personal protective equipment (PPE) will be provided to all who attend and/or present. - [UCCE Southern Sac Valley Prune Meeting](https://www.sacvalleyorchards.com/event/ucce-southern-sac-valley-prune-meeting/) - UCCE Southern Sac Valley Prune Meeting - 142 Garden Hwy, Yuba City, Tuesday, March 3rd, 8:00 AM - 12:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [UCCE Sacramento-Solano-Yolo Almond Meeting](https://www.sacvalleyorchards.com/event/ucce-sacramento-solano-yolo-almond-meeting/) - UCCE Sacramento-Solano-Yolo Almond Meeting - UCCE Yolo Office, 70 Cottonwood St, Woodland, CA, Wednesday, February 5th, 8:00 AM - 12:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [UCCE Colusa Almond Meeting](https://www.sacvalleyorchards.com/event/ucce-colusa-almond-meeting/) - UCCE Colusa Almond Meeting - Granzella’s Banquet Hall, 457 7th St, Williams, Tuesday, January 22, 8:00 AM - 12:00 PM Topics – To Be Announced, Continuing Education Credits – To Be Announced - [UCCE Yuba-Sutter Almond Meeting](https://www.sacvalleyorchards.com/event/ucce-yuba-sutter-almond-meeting/) - UCCE Yuba-Sutter Almond Meeting: 142 Garden Hwy, Yuba City, Tuesday, January 7th, 8:00 AM - 12:00 PM Topics - To Be Announced. Continuing Education Credits – To Be Announced - [2019 Post Harvest Almond & Walnut IPM Workshop](https://www.sacvalleyorchards.com/event/2019-post-harvest-almond-walnut-ipm-workshop/) - Join us for the annual Post Harvest Almond & Walnut IPM Workshop on November 22, 2019 from 8:00am - 11:00am at the Chico Memorial Hall. - [2019 UC Almond Short Course (registration required)](https://www.sacvalleyorchards.com/event/2019-uc-almond-short-course-registration-required/) - Almond Short Course - November 5-7, 2019 at the Visalia Convention Center (303 E Acequia Ave, Visalia, CA 93291) with Field Tour November 8 in Parlier. This integrated orchard management short course for new and experienced growers as well as other industry members interested in commercial almond production features UC faculty, Cooperative Extension specialists and farm advisors, and researchers who will provide an in-depth, comprehensive study of all phases of Almond production. - [San Joaquin Valley Spray Application Short Course (registration required)](https://www.sacvalleyorchards.com/event/san-joaquin-valley-spray-application-short-course-registration-required/) - Join us for this intensive 3-day short course on spray application research and extension, led by CE Specialist Peter Larbi. Includes two in-classroom lecture days and one outdoor, hands-on demonstration day. Register today to attend the San Joaquin Valley Spray Application Short Course, November 12-14, 2019 at the Kearney Agricultural Research and Extension Center. - [Mitigating Herbicide Damage in Young Almonds](https://www.sacvalleyorchards.com/event/mitigating-herbicide-damage-in-young-almonds/) - September 12, 8am-9am. Join Dani Lightle and Drew Wolter for a field meeting to observe how different trunk protection methods help mitigate herbicide damage to young almond trees. - [IPM Breakfast - Glenn/Tehama (RSVP Required)](https://www.sacvalleyorchards.com/event/ipm-breakfast-glenn-2/) - Join Area IPM and Farm Advisors to discuss current pest management and production issues. These meetings are open to all interested growers, consultants, PCAs, CCAs, and related industry. - [IPM Breakfast - Yuba-Sutter-Colusa (RSVP Required)](https://www.sacvalleyorchards.com/event/ipm-breakfast-yuba-sutter-colusa-2/) - Join Area IPM and Farm Advisors to discuss current pest management and production issues. These meetings are open to all interested growers, consultants, PCAs, CCAs, and related industry. - [Prune Breeding Program & Research Tour](https://www.sacvalleyorchards.com/event/prune-breeding-program-research-tour/) - We would like to invite the Prune Industry to a field day on Wednesday, July 31st, at the UC Wolfskill Experimental Orchards in Winters, California. The field day will provide an opportunity to view new prune selections and discuss future test trials. This year we will have an afternoon program hosted by local farm advisors Luke, Katherine & Franz with additional discussions and field stops in the Winters area. - [IPM Breakfast - Butte (RSVP Required)](https://www.sacvalleyorchards.com/event/ipm-breakfast-butte-2/) - 2019 IPM Breakfast Field Meeting, July 12, 8am-9:30am. Location: CSU, Chico University Farm 311 Nicholas C Shouten Ln, Chico, CA 95928 Join Area IPM and Farm Advisors to discuss current pest management and production issues. These meetings are open to all interested growers, consultants, PCAs, CCAs, and related industry. - [Morning Meet-Up - MOVED TO FRIDAY 6/14](https://www.sacvalleyorchards.com/event/morning-meet-up-4/) - Join farm advisor Dani Lightle for bi-weekly Morning Meet-Ups: a round table discussion of what she’s been seeing, what you’ve been seeing, and what just isn’t going right. Feel free to bring photos of symptoms or even samples of nuts/ leaves/ branches to evaluate or send into the lab. - [IPM Breakfast - Glenn (RSVP Required)](https://www.sacvalleyorchards.com/event/ipm-breakfast-glenn/) - Join Area IPM and Farm Advisors to discuss current pest management and production issues. These meetings are open to all interested growers, consultants, PCAs, CCAs, and related industry. - [Prune “Cropload Check” Field Meeting](https://www.sacvalleyorchards.com/event/prune-cropload-check-field-meeting/) - Spring Prune “Cropload Check” Field Meeting Wednesday, May 8, 2019 9-11 AM R&J Dryer; 2200 Encinal Rd, Live Oak, CA (west of Hwy 99 at LoMo Crossing, N of Yuba City) --Open to all growers and PCAs/CCAs-- At this meeting, we will demonstrate how to check cropload of mature prune trees and decide if shaker - [Morning Meet-Up](https://www.sacvalleyorchards.com/event/morning-meet-up-5/) - Join farm advisor Dani Lightle for bi-weekly Morning Meet-Ups: a round table discussion of what she’s been seeing, what you’ve been seeing, and what just isn’t going right. Feel free to bring photos of symptoms or even samples of nuts/ leaves/ branches to evaluate or send into the lab. - [Morning Meet-Up](https://www.sacvalleyorchards.com/event/morning-meet-up-3/) - Join farm advisor Dani Lightle for bi-weekly Morning Meet-Ups: a round table discussion of what she’s been seeing, what you’ve been seeing, and what just isn’t going right. Feel free to bring photos of symptoms or even samples of nuts/ leaves/ branches to evaluate or send into the lab. - [Morning Meet-Up](https://www.sacvalleyorchards.com/event/morning-meet-up-2/) - Join farm advisor Dani Lightle for bi-weekly Morning Meet-Ups: a round table discussion of what she’s been seeing, what you’ve been seeing, and what just isn’t going right. Feel free to bring photos of symptoms or even samples of nuts/ leaves/ branches to evaluate or send into the lab. - [Morning Meet-Up](https://www.sacvalleyorchards.com/event/morning-meet-up/) - Join farm advisor Dani Lightle for bi-weekly Morning Meet-Ups: a round table discussion of what she’s been seeing, what you’ve been seeing, and what just isn’t going right. Feel free to bring photos of symptoms or even samples of nuts/ leaves/ branches to evaluate or send into the lab. - [CANCELLED - IPM Breakfast - Tehama](https://www.sacvalleyorchards.com/event/ipm-breakfast-tehama/) - The event for May has been cancelled. Please visit us instead at the Nickels Field Day on May 7th. The next breakfast field meeting will be on June 14 in Glenn County. - [Weed Science School 2019](https://www.sacvalleyorchards.com/event/weed-science-school-2019/) - Location: Bowley Plant Science Teaching Center 1200 Extension Center Drive, Davis, CA Date: August 20-22, 2019 The Weed Science School is an intensive 2-1/2 day course focusing on the mode and mechanism of herbicide activity in plants and the fate of herbicides in the environment. This course provides a rare opportunity for professionals to efficiently update their - [Weed Day 2019](https://www.sacvalleyorchards.com/event/weed-day-2019/) - Come to the 63rd annual Weed Day event and learn about the latest weed science research at the University of California. MORNING SESSION The event begins with a morning field tour of the UC Davis weed science research plots. Buses will depart promptly at 8:15 AM from the UC Davis Buehler Alumni Center (530 Alumni Lane, - [Sustainable Groundwater Management in N. Sacramento Valley - Regional Forum](https://www.sacvalleyorchards.com/event/sustainable-groundwater-management-sac-valley-forum/) - Please join us at Rolling Hills Casino Event Center in Corning, CA for a regional forum to discuss how local agencies are progressing in the implementation of SGMA. It is vital that local water users understand SGMA and engage in its implementation. - [Walnut Training Systems](https://www.sacvalleyorchards.com/event/walnut-no-pruning-new-varieties-field-meeting/) - March 13th, 2019. Wheatland, CA. We will discuss various walnut training systems and walnut breeding updates, and see two-year-old Solano and Durham trees, the two newest variety releases. - [Updated date: Walnut Canopy Management](https://www.sacvalleyorchards.com/event/walnut-canopy-management/) - Due to weather, this field meeting will be held during the Annual Nickels Field Day on May 7th. We will discuss hedging and whisking trials since 2016 for 11 year old Chandler planted in a hedgerow. Keep reading for location details. - [Nickels Soil Lab Annual Field Meeting](https://www.sacvalleyorchards.com/event/nickels-soil-lab-annual-field-meeting/) - Tuesday, May 7, 2019 Registration 8:30 Program 9:00 am - 12:10 pm Arbuckle, CA CCA credit will be requested The complete program announcement will be made in an upcoming “Orchard Notes” newsletter. Please call our office at 530 822-7515 if you have any questions. - [Spring Almond Nutrient and Water Management Field Day](https://www.sacvalleyorchards.com/event/spring-almond-nutrient-and-water-management-field-day/) - Tuesday, March 26th, 2019 - Chico, CA 8:30 am to 12:30 pm Location: Chico State University Farm Requesting 3.5 CCA Continuing Education Units 2 CURES Continuing Education Units RSVP to http://ucanr.edu/survey/survey.cfm?surveynumber=26918 Agenda 8:30-9:00-Registration and coffee/treats Group Talks: 9:00-9:30 am- Welcome! Grower/management conversation about goals and practices. This session will 1) provide the method of developing - [Yolo-Solano-Sacramento Walnut Meeting](https://www.sacvalleyorchards.com/event/yolo-solano-sacramento-walnut-meeting-2/) - March 6th, 2019, from 8-noon. Additional information will be posted closer to the event. - [North Sacramento Valley Prune Day](https://www.sacvalleyorchards.com/event/north-sacramento-valley-prune-day/) - Friday, February 22nd, 8:30 am - 12:00 pm. Red Bluff Elks Lodge, 355 Gilmore Road, Red Bluff. - [South Sacramento Valley Prune Day](https://www.sacvalleyorchards.com/event/south-sacramento-valley-prune-day/) - Thursday, February 21st, 8am-noon Agenda will be posted closer to the event date. - [Vertebrate Pest Council Workshop](https://www.sacvalleyorchards.com/event/vertebrate-pest-council-workshop/) - Tuesday, February 19, 2019 Sacramento Crowne Plaza 5321 Date Avenue Sacramento, CA 95841 (916) 338-5800 AGENDA: 6:45 AM REGISTRATION 7:00 am Laws and Regs Update, Jenni King- County AG Commissioners Office 7:30 am Managing Commensal Rodents, Niamh Quinn, Ph.D., Human Wildlife Interactions Advisor, University of Agricultural and Natural Resources 8:15 am Healthy Schools Act and - [Sutter-Yuba-Colusa Walnut Day](https://www.sacvalleyorchards.com/event/sutter-yuba-colusa-walnut-day-3/) - Please note date change: February 28th, 12:30 p.m. - 4:30 p.m. Veterans Memorial Hall, 1425 Veteran’s Memorial Circle, Yuba City. Agenda will be posted closer to the event date. - [Yolo-Solano-Sacramento Walnut Meeting](https://www.sacvalleyorchards.com/event/yolo-solano-sacramento-walnut-meeting-3/) - Wednesday, March 6th 8:00am-12:00pm 70 Cottonwood Street, Woodland - [Meet the Buyers Tour](https://www.sacvalleyorchards.com/event/meet-the-buyers-tour/) - Meet produce buyers around the region and build new sales relationships with local grocers, produce distributors, restaurants and more at the Sacramento Meet the Buyers Tour! This tour is designed for beginning and small-medium sized farmers interested in expanding sales to organic and non-organic wholesale buyers. - [Yolo-Solano-Sacramento Almond Meeting](https://www.sacvalleyorchards.com/event/yolo-solano-sacramento-almond-meeting-2019/) - February 5th, 2019, 8am-noon. Keep reading for full agenda. - [Tehama County Walnut Meeting](https://www.sacvalleyorchards.com/event/tehama-county-walnut-meeting-2/) - February 8th, 2019 at the Red Bluff Elks Lodge. Keep reading for full agenda. - [IPM Breakfast - Yuba-Sutter-Colusa](https://www.sacvalleyorchards.com/event/ipm-breakfast-yuba-sutter-colusa/) - Join Area IPM and Farm Advisors to discuss current pest management and production issues. These meetings are open to all interested growers, consultants, PCAs, CCAs, and related industry. - [IPM Breakfast - Butte](https://www.sacvalleyorchards.com/event/ipm-breakfast-butte/) - Join Area IPM and Farm Advisors to discuss current pest management and production issues. These meetings are open to all interested growers, consultants, PCAs, CCAs, and related industry. - [North Sacramento Valley Almond & Walnut Day](https://www.sacvalleyorchards.com/event/north-sacramento-valley-almond-walnut-day/) - January 30th, 7am-2:30pm. **Please note Venue Change this year to the Glenn County Fairgrounds due to use of the previous venue as a Red Cross site from the Camp Fire. - [Colusa County SWEEP Grant Assistance Workshop](https://www.sacvalleyorchards.com/event/colusa-sweep-grant-assistance-workshop/) - Apply for CDFA funding & Receive free technical assistance to apply for grant funds. SWEEP is part of California Climate Investments, a statewide program that puts billions of Cap-and-Trade dollars to work reducing greenhouse gas emissions, strengthening the economy and improving public health and the environment particularly in disadvantaged communities Why: Receive up to $100,000 to - [Tehama County SWEEP Grant Assistance Workshop](https://www.sacvalleyorchards.com/event/tehama-sweep-grant-assistance-workshop/) - Apply for CDFA funding & Receive free technical assistance to apply for grant funds. SWEEP is part of California Climate Investments, a statewide program that puts billions of Cap-and-Trade dollars to work reducing greenhouse gas emissions, strengthening the economy and improving public health and the environment particularly in disadvantaged communities Why: Receive up to $100,000 to - [Sacramento Valley Cling Peach Day](https://www.sacvalleyorchards.com/event/sacramento-valley-cling-peach-day/) - January 10th, 2019, 8:30-noon Ag Building Meeting Room, 142A Garden Highway, Yuba City. Keep reading for full agenda. - [Spray Safe Meeting](https://www.sacvalleyorchards.com/event/spray-safe-meeting/) - January 16th, 2019, 8am-noon. Yuba/Sutter Fairgrounds. Agenda will be posted closer to the event date. - [Yuba City Almond Meeting](https://www.sacvalleyorchards.com/event/yuba-city-almond-meeting/) - January 8th, 9am to 11am. 142 Garden Hwy, Yuba City Full agenda will be posted closer to the event date. - [Colusa Almond Meeting](https://www.sacvalleyorchards.com/event/colusa-almond-meeting/) - January 17th at Granzella's Banquet Hall in Williams. Times and agenda will be posted closer to the event date. - [CANCELLED - 3rd Annual Post-Harvest Almond & Walnut IPM Workshop](https://www.sacvalleyorchards.com/event/2018-post-harvest-almond-walnut-ipm-meeting/) - The 3rd Annual Post-Harvest Almond & Walnut IPM Workshop which was scheduled for this Friday, November 16th in Chico has been CANCELLED. This cancellation is due to Chico continuing to be heavily impacted by Camp Fire emergency personnel activity, sheltering evacuees, and most services still heavily focused on disaster-response and aiding our neighbors from Paradise. - [Prune Breeding Program Field Day 2018](https://www.sacvalleyorchards.com/event/prune-breeding-field-day-2018/) - 9:00am on August 15th at the Wolfskill Experimental station in Winters. We will be discussing our new top items, tasting fresh fruit and touring the test orchards. - [Prune Rootstock Trial Field Day](https://www.sacvalleyorchards.com/event/prune-rootstock-field-day/) - Thursday, July 26th, 2018. Head out to the field to check out for yourself 14 rootstocks in two Sacramento Valley trials. - [Advances in Walnut Production Short Course](https://www.sacvalleyorchards.com/event/2018-walnut-short-course/) - November 5-7, 2018, Davis, California. Registration opens September 1st. - [2018 Sacramento Valley Olive Day](https://www.sacvalleyorchards.com/event/sacramento-valley-olive-day-2018/) - July 6th, 2018, 8:00am to noon 131 E. Walker Street Building #4, Orland, CA (Same plaza as Papa Murphy’s) - [Walnut Tree Training & Pressure Chamber Workshop](https://www.sacvalleyorchards.com/event/walnut-tree-training-pressure-chamber-workshop/) - Tuesday, July 10, 2018. Early Walnut Tree Training: Discuss early handling and training practices for different nursery products & Hands-on Pressure Chamber Workshop: Discuss using the plant-based pressure chamber for irrigation timing. - [IPM Breakfast - Glenn](https://www.sacvalleyorchards.com/event/ipm-breakfast-glenn-june2018/) - June 15th, 2018 -- Berry Patch Restaurant. Join Area IPM and Farm Advisors to discuss current pest management and production issues at the Monthly IPM Breakfast Meeting. - [IPM Breakfast - Glenn](https://www.sacvalleyorchards.com/event/ipm-breakfast-glenn-oct2018/) - October 19th, 2018 -- Berry Patch Restaurant. Join Area IPM and Farm Advisors to discuss current pest management and production issues at the Monthly IPM Breakfast Meeting. - [IPM Breakfast - Tehama](https://www.sacvalleyorchards.com/event/ipm-breakfast-tehama-sept2018/) - September 21st, 2018 -- Rockin R Restaurant Join Area IPM and Farm Advisors to discuss current pest management and production issues at the Monthly IPM Breakfast Meeting. - [IPM Breakfast - Yuba/Sutter/Colusa](https://www.sacvalleyorchards.com/event/ipm-breakfast-yubasutter-august2018/) - August 17, 2018 -- IHOP, 1310 Franklin Rd, Yuba City. Join Area IPM and Farm Advisors to discuss current pest management and production issues at the Monthly IPM Breakfast Meeting. - [IPM Breakfast - Butte](https://www.sacvalleyorchards.com/event/ipm-breakfast-butte-july2018/) - July 20th, 2018 - Red Rooster Cafe, Durham. Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [Diagnosing Herbicide Symptoms 2018](https://www.sacvalleyorchards.com/event/diagnosing-herbicide-symptoms-2018/) - PROGRAM The Diagnosing Herbicide Symptoms 2018 course is an intensive 1.5-day course focusing on how an herbicide injury situation can arise, what types of information can help diagnose herbicide problems during field investigations, and what tools are available to you. The course provides a rare opportunity for professionals to efficiently update their understanding of herbicide symptoms and - [Weed Day 2018](https://www.sacvalleyorchards.com/event/weed-day-2018/) - Come to the 62nd annual Weed Day event and find out what the latest University of California weed science research is. MORNING SESSION The event begins with a morning field tour of the UC Davis weed science research plots. Buses will depart promptly at 8:15 AM from the Buehler Alumni Center, UC Davis. Lunch and afternoon presentations - [Nickels Field Day](https://www.sacvalleyorchards.com/event/nickels-field-day-2018/) - May 8th, 2018. Keep reading for the full agenda and lunch registration details. - [*Location Change* IPM Breakfast - Yuba/Sutter/Colusa](https://www.sacvalleyorchards.com/event/ipm-breakfast-april-yubasutter/) - April 20, 2018 -- IHOP, 1310 Franklin Rd, Yuba City. Join Area IPM and Farm Advisors to discuss current pest management and production issues at the Monthly IPM Breakfast Meeting. - [IPM Breakfast - Tehama](https://www.sacvalleyorchards.com/event/ipm-breakfast-september-tehama/) - May 18th, 2018 -- Rockin R Restaurant Join Area IPM and Farm Advisors to discuss current pest management and production issues at the Monthly IPM Breakfast Meeting. - [Spring Almond & Walnut Nutrient and Water Management Field Day](https://www.sacvalleyorchards.com/event/nitrogen-management-field-day/) - March 27th, 8:30am - 1pm, Corning, CA. Please join us to participate in talks and rotating sessions on best water and nutrient management practices. - [Sutter-Yuba Prune Meeting](https://www.sacvalleyorchards.com/event/sutter-yuba-prune-meeting/) - nnual UCCE South Sacramento Valley Prune Meeting Co-sponsored by Sutter Co Ag Commissioner’s Office Friday, March 2, 2018, 8:00 AM – 12:15 PM. Keep reading for full agenda. - [Northern Sacramento Valley Prune Day](https://www.sacvalleyorchards.com/event/northern-sacramento-valley-prune-day/) - February 23rd, Red Bluff Elk's Lodge, 8:30-1pm. Keep reading for full agenda. - [Sutter-Yuba-Colusa Walnut Day](https://www.sacvalleyorchards.com/event/sutter-yuba-colusa-walnut-day-2/) - Febraury 22, 12:30-4:30pm, Veterans Memorial Hall, Yuba City. Topics include: 2017 flood damage and recovery; walnut tree growth characteristics; rootstocks; thousand cankers disease; laws & regs; California Walnut Board activities. Keep reading for full agenda. - [Managing Soil & Water Quality in Sacramento Valley Agriculture](https://www.sacvalleyorchards.com/event/managing-soil-water-quality-in-sacramento-valley-agriculture/) - This workshop will explore various soil and water quality issues that may confront growers and agricultural consultants and discuss some of the management tools and strategies that are available to diagnose and manage them. RSVP Required. - [IPM Breakfast - Butte](https://www.sacvalleyorchards.com/event/ipm-breakfast-november-butte/) - Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [Sutter-Yuba-Colusa Almond Day](https://www.sacvalleyorchards.com/event/sutter-yuba-colusa-almond-day/) - February 7, 2018 2.0 hours of PCA CE (0.5 hr Laws/Regs & 1.5 hrs Other) approved 3 hours of CCA CE (0.5 hr Nutrient Man., 0.5 hr Soil&Water Man., 1.5 hr IPM, 0.5 Crop Man.) requested Thanks to: Farm Credit Services of Colusa-Glenn, ACA For coffee and donuts AGENDA : 9:00 SIGN-IN 9:15 - [Pesticide Safety Instructor Training Workshops](https://www.sacvalleyorchards.com/event/pesticide-safety-instructor-training-workshops/) - Pesticide Safety Instructor Training Workshops - [Pesticide Safety Instructor Training Workshops - Spanish](https://www.sacvalleyorchards.com/event/pesticide-safety-instructor-training-workshops-spanish/) - Pesticide Safety Instructor Training Workshops - Spanish - [Tehama County Walnut Meeting](https://www.sacvalleyorchards.com/event/tehama-county-walnut-meeting-2018/) - February 2nd, 2018, Elk's Lodge, Red Bluff. - [Butte-Glenn-Tehama Walnut and Almond Day](https://www.sacvalleyorchards.com/event/butte-glenn-almond-and-walnut-meeting/) - January 31st, 2018 - Silver Dollar Fairgrounds, Chico, CA. Keep reading for full agenda. - [23rd Annual Sacramento Valley Cling Peach Day](https://www.sacvalleyorchards.com/event/23rd-annual-sacramento-valley-cling-peach-day/) - January 4th, 2018. Save the date; agenda will be posted when available. - [Post-Harvest Almond & Walnut IPM Meeting](https://www.sacvalleyorchards.com/event/post-harvest-almond-walnut-ipm-meeting/) - Friday, November 17th, 2017, 8:00am – 12:00pm Chico Veteran's Memorial Hall, please see map below. 3 hours DPR CE units “other” Approved, 3 Hours CCA “IPM” pending. Agenda: 8:00 – 8:30am Registration & Welcome 8:30 – 9:00am 2017 Insect & Mite Highlights – What to do next Emily Symmes, UCCE IPM Advisor, Sacramento - [Principles of Fruit and Nut Tree Growth, Cropping, & Management](https://www.sacvalleyorchards.com/event/principles-of-fruit-and-nut-tree-growth-cropping-management/) - The Fruit and Nut Research and Information Center at UC Davis is offering a two-week extension course focused on understanding basic fruit and nut tree biology and physiology and how it relates to agronomic practices. Understanding the fundamentals of tree biology is essential in making sound orchard management and business decisions in the fruit and nut trees industry. The course is taught by UC Davis faculty, extension specialists and farm advisors. - [Advances in Pistachio Production Short Course](https://www.sacvalleyorchards.com/event/advances-in-pistachio-production-short-course/) - November 14-16, 2017 in Visalia, CA. This course is designed for orchard decision makers, and covers the basic science, not as experimental data, but as accepted science that supports current and developing production practices including regional differences. - [Yolo-Solano-Sacramento Almond Meeting](https://www.sacvalleyorchards.com/event/yolo-solano-sacramento-almond-meeting/) - February 6th, 2018, 8:00-noon. Save the date! More information and the agenda will be posted closer to the event. - [Advances in Prune Production](https://www.sacvalleyorchards.com/event/advances-in-prune-production/) - The latest research and how it impacts your management practices. The meeting will include researcher presentations (30-45 minutes each) followed by Question and Answer sessions (30-45 minutes) to help growers and PCAs plan to apply research results ahead of the pruning season. - [Yolo-Solano-Sacramento Walnut Meeting](https://www.sacvalleyorchards.com/event/yolo-solano-sacramento-walnut-meeting/) - March 6, 8:00-noon, 70 Cottonwood Street, Woodland. Save the date - more details will be posted closer to the event. - [IPM Breakfast - Colusa](https://www.sacvalleyorchards.com/event/ipm-breakfast-july-colusa/) - July 11, 2017. Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [IPM Breakfast - Butte](https://www.sacvalleyorchards.com/event/ipm-breakfast-june-butte/) - June 13, 2017. Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [Almond Variety Trial Field Day](https://www.sacvalleyorchards.com/event/almond-variety-trial-field-day/) - The northern location of the Regional Almond Variety Trial is hosted by Chico State University at the University Farm. Come by the farm at 9 a.m. to hear about the newest varieties, see some of the preliminary data, and judge which trees you want in your next orchard. - [Prune Thinning Meeting](https://www.sacvalleyorchards.com/event/prune-thinning-meeting/) - Save the Date! Friday AM, April 28 Looks like a decent to good prune crop in the Yuba City area. With pit hardening started already, it will soon be reference date and time to count fruit and decide if shaker thinning is needed. A prune grower field meeting, sponsored by UCCE and Sunsweet Growers, Inc., - [Nickels Field Day](https://www.sacvalleyorchards.com/event/nickels-field-day/) - Morning, May 10th. We'll meet at the Green Bay Road location in Arbuckle. Full agenda will be posted when available. Wednesday, May 10, 2017 Green Bay Rd., Arbuckle, CA 1.0 hour PCA CE credits requested 2.5 hours CCA CE credit requests 8:30 a.m. — Registration Coffee and Donuts provided by Farm Credit Services of - [IPM Breakfast - Glenn](https://www.sacvalleyorchards.com/event/ipm-breakfast-may-glenn/) - Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [Using a Pressure Chamber to Manage Irrigation](https://www.sacvalleyorchards.com/event/using-a-pressure-chamber-to-manage-irrigation/) - The University of California Cooperative Extension invites fruit and nut crop producers to participate in a free training opportunity. This workshop will offer classroom teaching and field experience. Attendees will have an opportunity to learn to use a pressure chamber on different nut and fruit crops, work with different types of pressure chambers and learn about a new app that speeds up the monitoring process. - [Airblast Sprayer Calibration Field Day](https://www.sacvalleyorchards.com/event/airblast-sprayer-calibration-field-day/) - A sprayer calibration workshop, co-sponsored by BASF and University of California Cooperative Extension, will be held Tuesday, April 25 from 7:30AM -1:00PM at the Nickels Soil Lab (Green Bay site) in Arbuckle. - [IPM Breakfast - Tehama](https://www.sacvalleyorchards.com/event/ipm-breakfast-april-tehama/) - Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [IPM Breakfast - Yuba/Sutter](https://www.sacvalleyorchards.com/event/ipm-breakfast-march-yubasutter/) - Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [South Sacramento Valley Prune Grower Meeting](https://www.sacvalleyorchards.com/event/south-sacramento-valley-prune-grower-meeting/) - Friday, March 3, 2017, 7:45 AM – 12:15 PM followed by hosted lunch. Veterans Memorial Hall, 1425 Veterans Memorial Circle, Yuba City. Read more for full agenda. - [CANCELLED - Walnut (2 Year Old) No Pruning Field Meeting](https://www.sacvalleyorchards.com/event/walnut-2-year-old-no-pruning-field-meeting/) - Tuesday, February 28, 2017 Rain date: March 2, 2017 - [CANCELLED - Walnut No Pruning Variations Comparison Field Meeting](https://www.sacvalleyorchards.com/event/walnut-no-pruning-variations-comparison-field-meeting/) - February 28th, 2017, 2:30 to 3:30 Bear River Walnut Ranch 2031 Spenceville Rd, Wheatland Rain Date: March 2nd, 2017. - [CANCELLED - Walnut Pruning/No Pruning Comparison & Bot Pruning Wound Field Meeting](https://www.sacvalleyorchards.com/event/walnut-pruningno-pruning-comparison-bot-pruning-wound-field-meeting/) - February 28th, 2017. Nickels Soil Lab, Arbuckle Rain date: March 2nd, 2017. Keep reading for more information. - [CANCELLED - Sutter-Yuba-Colusa Walnut Day](https://www.sacvalleyorchards.com/event/sutter-yuba-colusa-walnut-day/) - February 21st, 1:00pm - 4:30pm. Veteran's Hall, Yuba City. Keep reading for the full meeting agenda. - [CANCELLED - IPM Breakfast - Colusa](https://www.sacvalleyorchards.com/event/ipm-breakfast-feb-colusa/) - Join Emily Symmes (Sacramento Valley IPM Advisor) for the Monthly IPM Breakfast Meeting. The meetings will rotate throughout the Sacramento Valley & cover timely pest management topics. All growers, PCAs, and CCAs are welcome to join in the discussion. - [Sacramento-Solano-Yolo Walnut Meeting](https://www.sacvalleyorchards.com/event/sacramento-solano-yolo-walnut-meeting/) - [Pesticide Safety Instructor Training Workshop - in Spanish](https://www.sacvalleyorchards.com/event/pesticide-safety-instructor-training-workshop-in-spanish/) - Pesticide Safety Instructor Training Workshops Presented by UC IPM and AgSafe Seguridad de Pesticidas Talleres de Formación de Instructores - [Tehama County Prune Meeting](https://www.sacvalleyorchards.com/event/tehama-county-prune-meeting/) - Register for lunch by February 9, 2017. Keep reading for the meeting agenda. - [22nd Annual Sacramento Valley Cling Peach Day](https://www.sacvalleyorchards.com/event/22nd-annual-sacramento-valley-cling-peach-day/) - Thursday, February 2, 2017 8:30 a.m. - Noon / Lunch: Noon - 12:45 p.m. Ag Building Meeting Room, 142 Garden Highway, Yuba City Keep reading for meeting agenda. - [Pesticide Safety Instructor Training Workshop - in English](https://www.sacvalleyorchards.com/event/pesticide-safety-instructor-training-workshop-in-english/) - Pesticide Safety Instructor Training Workshops Presented by UC IPM and AgSafe Update your knowledge of changing regulations! This course meets the requirements established by the revised 2018 Worker Protection Standard, which is mandated by the US Environmental Protection Agency and the California Department of Pesticide Regulation. This workshop, presented by the UC Integrated Pest Management - [Tehama County Walnut Meeting](https://www.sacvalleyorchards.com/event/tehama-county-walnut-meeting/) - January 20, 2017. Welcome to our 23rd annual Walnut Day here in Tehama. Feel free to ask questions throughout the program. There will be a time period at the end of the final presentation to speak with the presenters. We’d like to “Thank You” for taking time out of your day to come and join us, to - [Butte & Glenn County Almond and Walnut Day in conjunction with North Valley Nut Conference](https://www.sacvalleyorchards.com/event/butte-glenn-county-almond-and-walnut-day-chico-trade-show/) - January 19, 2017; Registration begins at 7:30. 3.0CE credits have been requested. Click the event title above to view the full agenda. - [Colusa County Almond Day](https://www.sacvalleyorchards.com/event/colusa-county-almond-day/) - February 8th, 8:00-noon. This annual meeting will be held during the Colusa County Farm Show at the Stagehand Theater, Colusa County Fairgrounds. Agenda will be posted closer to the event date. - [Sacramento-Solano-Yolo Almond Meeting](https://www.sacvalleyorchards.com/event/sacramento-solano-yolo-almond-meeting/) - February 7th, 2017 - save the date! Agenda will be posted closer to the meeting date. - [2016 Post-Harvest Almond & Walnut IPM Meeting](https://www.sacvalleyorchards.com/event/2016-almond-post-harvest-field-meeting/) - November 2nd, 2016, 8:00-noon. This round-table formatted meeting will feature: spider mite management in almonds and walnuts 2016 disease highlights in almonds and walnuts ant ID and management harvest sample damage ID in almonds and walnuts round table discussion 2 CE credits ("other") are approved. We will be meeting at the Chico State Farm Pavilion - [Almond Production Short Course](https://www.sacvalleyorchards.com/event/almond-production-short-course/) - The Almond Short Course is from November 8-11 in Modesto, CA. More information and registration can be found on the 2016 Almond Short Course website. - [Table Olive Mechanical Harvest Field Day](https://www.sacvalleyorchards.com/event/table-olive-mechanical-harvest-field-day/) - Interested in seeing olive trunk shakers in action? Want more information on pruning trees to achieve the greatest harvest efficiency? Swing by between 9 and 11am on October 8th to enjoy some coffee, see the trunk shakers, and have your questions answered. Gavin Nielsen with Nielsen Technologies will be on hand to talk about how - [Prune Breeding Program Field Day](https://www.sacvalleyorchards.com/event/prune-breeding-program-field-day/) - We would like to invite the Dried Plum Testing Group and all interested parties to a field day on Friday, July 29, 2016, at the UC Wolfskill Experimental Orchards in Winters, California. The field day will provide an opportunity to view new prune selections and discuss future test trials. The meeting will consist of a - [Citrus Growers' Seminar](https://www.sacvalleyorchards.com/event/citrus-growers-seminar/) - For the first time in a number of years, we are hosting a UCCE/Citrus Research Board Growers’ Seminar in Northern California. It will be Thursday, July 14th, 8 AM to noon at the Loomis Vet Hall in Loomis. Registration is required! Fill out the form at https://form.jotform.com/61194145828965. Topics include: Plant Nutrition and Root Disease Asian - [Sacramento Valley Olive Knot Day](https://www.sacvalleyorchards.com/event/sacramento-valley-olive-knot-day/) - Sacramento Valley Olive Knot Day June 21st, 9:00am to 12:00pm Location: California Olive Ranch, 5945 County Rd 35, Artois - [Irrigation Technology Workshop/ Field Day for Nut and Fruit Crops](https://www.sacvalleyorchards.com/event/irrigation-technology-workshop-field-day-for-nut-and-fruit-crops/) - The University of California Cooperative Extension invites fruit and nut crop producers in the northern Sacramento Valley to attend a combination workshop/field day on Thursday, June 16, 2016. The meeting begins at the Red Bluff Elk's Lodge, 355 Gilmore Rd - [Weed Day 2016](https://www.sacvalleyorchards.com/event/weed-day-2016/) - The 60th annual Weed Day event provides an opportunity for pest control advisors, farm advisors, chemical company cooperators, college faculty and students, and regulatory officials to learn about current weed science research at UC Davis. The event begins with a morning field tour of the UC Davis weed science research plots. Lunch and afternoon presentations will be indoors in the Buehler Alumni Center. UC staff and students will present information on projects that are not in-season for viewing or located off-campus. Presentations will include basic research showing the scope of the Weed Science Program. ## Categories - [Uncategorized](https://www.sacvalleyorchards.com/uncategorized/) - [Walnuts](https://www.sacvalleyorchards.com/walnuts/) - [Almonds](https://www.sacvalleyorchards.com/almonds/) - [Prunes](https://www.sacvalleyorchards.com/prunes/) - [Irrigation Management](https://www.sacvalleyorchards.com/irrigation-mgmt/) - [Pest Reports](https://www.sacvalleyorchards.com/pest-reports/) - Insect scouting reports and updates from the Sacramento Valley. - [Olives](https://www.sacvalleyorchards.com/olives/) - [Diseases - Foliar](https://www.sacvalleyorchards.com/almonds/foliar-diseases/) - [Insects & Mites](https://www.sacvalleyorchards.com/almonds/insects-mites/) - [Diseases](https://www.sacvalleyorchards.com/olives/diseases-olives/) - [Insects & Mites](https://www.sacvalleyorchards.com/olives/insects-mites-olives/) - [Diseases](https://www.sacvalleyorchards.com/prunes/diseases-prunes/) - [Insects & Mites](https://www.sacvalleyorchards.com/prunes/insects-mites-prunes/) - [Diseases](https://www.sacvalleyorchards.com/walnuts/diseases/) - [Insects & Mites](https://www.sacvalleyorchards.com/walnuts/insects-mites-walnuts/) - [Blog](https://www.sacvalleyorchards.com/blog/) - [Almonds](https://www.sacvalleyorchards.com/blog/almonds-blog/) - [Olives](https://www.sacvalleyorchards.com/blog/olives-blog/) - [Prunes](https://www.sacvalleyorchards.com/blog/prunes-blog/) - [Walnuts](https://www.sacvalleyorchards.com/blog/walnuts-blog/) - [Cultivars & Rootstocks](https://www.sacvalleyorchards.com/almonds/cultivars-rootstocks/) - [Weed Control](https://www.sacvalleyorchards.com/almonds/weed-control/) - [Pollination](https://www.sacvalleyorchards.com/almonds/pollination/) - [Horticulture](https://www.sacvalleyorchards.com/almonds/horticulture/) - [Irrigation](https://www.sacvalleyorchards.com/almonds/irrigation/) - [Vertebrates](https://www.sacvalleyorchards.com/almonds/vertebrates/) - [Irrigation](https://www.sacvalleyorchards.com/prunes/irrigation-prunes/) - [Weed Control](https://www.sacvalleyorchards.com/prunes/weed-control-prunes/) - [Horticulture](https://www.sacvalleyorchards.com/prunes/horticulture-prunes/) - [Horticulture](https://www.sacvalleyorchards.com/walnuts/horticulture-walnuts/) - [Irrigation](https://www.sacvalleyorchards.com/walnuts/irrigation-walnuts/) - [Using ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/using-et-reports/) - [Year-Round Management](https://www.sacvalleyorchards.com/almonds/year-round-management/) - [Year-Round Management](https://www.sacvalleyorchards.com/walnuts/year-round-management-walnuts/) - [Year-Round Management](https://www.sacvalleyorchards.com/prunes/year-round-management-prunes/) - [2016 Pest Reports](https://www.sacvalleyorchards.com/pest-reports/2016-pest-reports/) - [2016 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2016-et-reports/) - [Photos from the Field](https://www.sacvalleyorchards.com/photos-from-the-field/) - Photos and field diagnoses from farm calls and other trips into local orchards. - [Flood Damage](https://www.sacvalleyorchards.com/walnuts/flooding/) - [2017 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2017-et-reports/) - [2018 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2018-et-reports/) - [2017 Pest Reports](https://www.sacvalleyorchards.com/pest-reports/2017-pest-reports/) - [Walnut Orchard Development](https://www.sacvalleyorchards.com/walnuts/orchard-development/) - [Diseases - Trunk & Soil Borne](https://www.sacvalleyorchards.com/almonds/trunk-soil-diseases/) - [Bloom Management](https://www.sacvalleyorchards.com/prunes/bloom/) - [Manuals](https://www.sacvalleyorchards.com/manuals/) - Lengthier but in-depth resources for management and troubleshooting. - [Young Orchard Handbook](https://www.sacvalleyorchards.com/manuals/young-orchard-handbook/) - [2018 Pest Reports](https://www.sacvalleyorchards.com/pest-reports/2018-pest-reports/) - [Stem Water Potential Series](https://www.sacvalleyorchards.com/manuals/stem-water-potential/) - [Cost and Expense Considerations](https://www.sacvalleyorchards.com/walnuts/cost-and-expense-considerations/) - [2019 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2019-et-reports/) - [2019 Pest Reports](https://www.sacvalleyorchards.com/pest-reports/2019-pest-reports/) - [ET Calculators](https://www.sacvalleyorchards.com/irrigation-mgmt/et-calculators/) - [Weed Control](https://www.sacvalleyorchards.com/walnuts/weed-control-walnuts/) - [2020 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2020-et-reports/) - [ET How-To Video Series](https://www.sacvalleyorchards.com/irrigation-mgmt/et-how-to-video-series/) - Video series on putting the principles of crop ET to use in orchards. - [2021 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2021-et-reports/) - [Lean Price Year Considerations](https://www.sacvalleyorchards.com/almonds/lean-price-year-considerations/) - [Pistachio](https://www.sacvalleyorchards.com/pistachio/) - [Pistachios](https://www.sacvalleyorchards.com/blog/pistachios/) - [Horticulture](https://www.sacvalleyorchards.com/pistachio/horticulture-pistachio/) - [Irrigation](https://www.sacvalleyorchards.com/pistachio/irrigation-pistachio/) - [Cultivars & Rootstocks](https://www.sacvalleyorchards.com/pistachio/cultivars-rootstocks-pistachio/) - [Insects & Mites](https://www.sacvalleyorchards.com/pistachio/insects-mites-pistachio/) - [Weed Control](https://www.sacvalleyorchards.com/pistachio/weed-control-pistachio/) - [Common Concerns](https://www.sacvalleyorchards.com/blog/common-concerns/) - [2022 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2022-et-reports/) - [2023 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2023-et-reports/) - [2024 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2024-et-reports/) - [2024 Pest Reports](https://www.sacvalleyorchards.com/pest-reports/2024-pest-reports/) - [Peach](https://www.sacvalleyorchards.com/blog/peach/) - [Economics](https://www.sacvalleyorchards.com/prunes/economics-prunes/) - [2025 Pest Reports](https://www.sacvalleyorchards.com/pest-reports/2025-pest-reports/) - [2025 ET Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/2025-et-reports/) - [Newsletter Archive](https://www.sacvalleyorchards.com/newsletter-archive/) - [Groundwater Reports](https://www.sacvalleyorchards.com/irrigation-mgmt/groundwater-reports/) - [Kiwifruit](https://www.sacvalleyorchards.com/kiwifruit/) - [Disease](https://www.sacvalleyorchards.com/kiwifruit/disease/) - [Kiwifruit](https://www.sacvalleyorchards.com/blog/kiwifruit-blog/) ## Tags - [field day](https://www.sacvalleyorchards.com/tag/field-day/) - [ET report](https://www.sacvalleyorchards.com/tag/et-report/) ## Event Categories - [Sacramento Valley](https://www.sacvalleyorchards.com/events/category/sacramento-valley/) - [Prune](https://www.sacvalleyorchards.com/events/category/prune/) - [Walnut](https://www.sacvalleyorchards.com/events/category/walnut/) - [Almond](https://www.sacvalleyorchards.com/events/category/almond/) - [Peach](https://www.sacvalleyorchards.com/events/category/peach/) - [Olive](https://www.sacvalleyorchards.com/events/category/olive/) - [Pistachio](https://www.sacvalleyorchards.com/events/category/pistachio/) - [Kiwifruit](https://www.sacvalleyorchards.com/events/category/kiwifruit/)