Mar 23, 2021
Walnut Update Zoom meeting set for April 2 for Lake County, California

The 2021 Lake County, California, Walnut Update will be held April 2 from 8:30 a.m.-12:30 p.m. Pacific. The meeting is co-sponsored by the University of California Cooperative Extension, Lake County Department of Agriculture and the California Walnut Board.

For those needing CalDPR CEUs, there will be 0.5 units of Laws/Regs and 1.0 unit of Other.

As with all recent meetings, this will be virtual via Zoom. Participants need to register by March 31 using this Zoom link.

Sign on the morning of the meeting will be from 8-8:30 a.m. with the program beginning promptly at 8:30. Following the program there will be time for questions/answers, and there will a “chat” link for comments, discussion and questions. Many have become quite familiar with Zoom so this should be easily navigated; if you are new to the system, contact Rachel Elkins, Pomology Farm Advisor, Lake and Mendocino Counties, Emeritus Recall Non-Faculty Academic Appointee – pear and walnut. She can be reached here by email.

“You might note that there is no walnut blight talk this year,” Elkins said in the event announcement. “Rather than a formal talk, I am attaching the UC IPM Walnut Blight Guidelines, which can be viewed here. I will also set up a Zoom meeting (below) to enable more informal discussion and question/answer about walnut blight.”

WALNUT BLIGHT BIOLOGY AND CONTROL Walnut Blight Biology and Control Zoom meeting March 26

What: An informal presentation/discussion session to inform local growers and others making decisions concerning walnut blight in the event of continuing wet conditions through the spring.


– Jim Adaskaveg, Dept. of Microbiology and Plant Pathology, UC Riverside

– Rachel Elkins, Pomology Farm Advisor (Emeritus), UC Cooperative Extension, Lake and Mendocino Counties

Time: March 26, 2021 10:-11 a.m. Pacific Time (US and Canada); Sign in begins 9:30 a.m..


“In the meantime, please review the IPM guidelines and note any aspects of particular interest. Generally, although one never knows if blight will be a concern in any given year, if there was blight present on your nuts last year, and certainly for two successive years, and if the level of blight affected your grade, it is important to be prepared to treat. Full coverage is necessary, so having access to a sprayer which can reach the tops of the trees is crucial.

“As usual, please contact me for assistance with individual orchard questions or problems,” Elkins said. “With vaccines ramping up, visiting in person should become much easier as the season progresses.”

2021 Lake County Walnut Update

Friday, April 2, 2020 (8:00 a.m. to 12:30 p.m.)

Sponsors: UC Cooperative Extension (UCCE), Lake County Department of Agriculture, and California Walnut Board (CWB)



0.5 hour Laws and Regulations, 1 hour Other CEUs approved


8:30 Welcome, overview of meeting process; Status of UC walnut-related programs in Lake County

Overview of 2020 growing season and 2021 outlook and concerns

Rachel Elkins, Pomology Farm Advisor (Emeritus), UC Cooperative Extension

8:45 Pesticide use laws and regulations update

Katherine Vanderwall, Deputy Agricultural Commissioner, Lake County Department of Agriculture

9:15 UC Fruit and Nut Research and Information Center (FNRIC) walnut-related content

Julia Stover-Blackburn, Director, UC Fruit and Nut Research and Information Center

9:30 Orchard management practices to optimize tree health and yield

Bruce Lampinen, Integrated Orchard Systems Specialist, UC Davis

10:00 BREAK

10:15 Lesion nematode biology and management

Andreas Westphal, Extension Nematologist, UC Riverside

10:45 Walnut rootstock field trial update

Janine Hasey, Tree Crop and Horticulture Advisor (Emeritus), UC Cooperative Extension

11:15 Walnut husk fly research update

Cindy Kron, UCCE North Coast IPM Advisor, Sonoma County

11:45 California walnut industry update

California Walnut Board Team

12:15 Questions and answers, wrap-up, and quiz


Photo: California Walnut Board


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