Northern Sac Valley Soil Moisture Loss Report – July 1, 2016
July 1st ET Report for the Gerber South, Durham, and Colusa CIMIS stations. Continue reading
Author Archives: Sacramento Valley Orchards
Northern Sac Valley Soil Moisture Loss Report – June 24, 2016
June 24th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. Continue reading
Northern Sac Valley Soil Moisture Loss Report – June 17, 2016
June 17th ET Report for the Gerber South, Durham, and Colusa CIMIS stations. Continue reading
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 … Continue reading
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, … Continue reading
Navel Orangeworm vs Codling Moth Identification Chart
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
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