Ongoing research

Cooperative Extension, Sutter-Yuba Counties: Page

Walnuts

UC IPM - Walnut Pest Management *NEW Cost Study 2022 2017 Yellow Leaf Symptoms and Causes Walnut Quality Irrigation Walnut - New Varieties Walnut Rootstocks Walnut No Pruning/Pruning Compared Walnut Insects Diseases of Branches, Foliage and/or Nuts Frost and Freeze Damage California Walnut Board Sac...
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Cooperative Extension, Sutter-Yuba Counties: Page

Cost Study

Walnut Cost Study - 2015...
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Cooperative Extension, Sutter-Yuba Counties: Page

Irrigation

Using Plant Based Measurements to Refine Irrigation Scheduling in Walnuts UC Drought Management - Irrigating with limited water supplies Irrigating Young Trees Irrigation Management Pays Walnut Stem Water Potential (SWP) Baseline...
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Cooperative Extension, Sutter-Yuba Counties: Page

Walnut Insects

Chemical Control of Walnut Husk Fly - January, 2016 Walnut Huskfly Biology handout 6 20 14 Black Mushy Walnut Hulls...
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Cooperative Extension, Sutter-Yuba Counties: Page

Diseases of Branches, Foliage and/or Nuts

Branch Wilt Botryosphaeria and Phomopsis Blight and Cankers Anthracnose on English Walnuts Thousand Cankers Disease of Walnuts: A New Disease in California Walnut Twig Beetle and Thousand Cankers Disease: Field Identification Guide...
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Cooperative Extension, Sutter-Yuba Counties: Page

Frost and Freeze Damage

Walnut damage from winter kill or autumn frosts Walnut damage from spring frost...
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Cooperative Extension, Sutter-Yuba Counties: Page

Walnut: No Pruning / Pruning Compared

Training Young Walnut Trees - Minimum Pruning vs No Pruning Revised 3-7-18 No Pruning / Pruning Comparison (2014 Handout for NSL pruning field day) Click on image to view poster...
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Cooperative Extension, Sutter-Yuba Counties: Page

Food Safety

The service of safe food should be a priority at all 4-H meetings, events, and fundraisers. Any activity where food is served (potluck, concession stand, bake sale, etc.) has the risk of food borne illness. Training for 4-H adult volunteers and youth members should be conducted annually.
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