Walnuts

Houston Wilson, in baseball cap, gestures while doing a talk in the shade of an orchard
Article

Wilson brings science to California’s high-priority crops

November 21, 2025
By Michael Hsu
Based at the Kearney Agricultural Research and Extension Center near Fresno, UC Cooperative Extension specialist Houston Wilson and his team develop integrated pest management (IPM) strategies for some of California’s most valuable agricultural commodities.
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bright green growth on green stem of walnut tree
Article

Finish Walnut Season Strong for Best Crop Production

August 25, 2025
By Hardeep Singh, Luke K Milliron
September Walnut Orchard Tasks for Agriculture To-Do List  September is the time to focus on finishing the crop season well by protecting the kernel color and quality, keeping the insect pests in check, and setting the trees up for a stress-free winter. Irrigation and Nutrition Management in the…
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The buds shown on the walnut branches are male flowers called catkins
Article

UC scientists ask walnut trees: When do you need to be irrigated?

April 16, 2025
By Trina Kleist
UC scientists are working with growers in Tehama, Butte, Lake, Amador, Contra Costa, Stanislaus and Yolo counties to test a new way of measuring the irrigation needs of walnut trees. Shackel and team think this new method will allow growers to use less water by not irrigating early in the season, and trees…
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