Author Archives: Sacramento Valley Orchards
IPM Insect Update – June 13, 2016
Tehama County Insect Pest Update for June 13, 2016. Continue reading
Northern Sac Valley Soil Moisture Loss Report – June 10, 2016
June 10th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. Continue reading
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 … Continue reading
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 … Continue reading
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 … Continue reading
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. Continue reading
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). Continue reading
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 … Continue reading
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 … Continue reading
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 … Continue reading
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 … Continue reading
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 … Continue reading
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. … Continue reading
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. … Continue reading