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Walnuts in California > Deficiencies & Pests > Diseases Plant diseases may be caused by fungal, bacterial, or viral pathogens. They are transmitted from plant to plant by wind, water, soil, or insect vectors, often entering into the plant by way of natural openings or wounds.
Walnuts in California > Deficiencies & Pests > Insect, Mite & Nematode Pests The prevalence of insect, mite and nematode pests varies from orchard to orchard and is influenced by geographic location, weather and orchard management practices.
Use back button to return to previous page Vertebrate Pests of Orchard Crops Photo Gallery These photos of some of the major pests are viewed courtesy of University of California research and extension personnel and programs, including the UC Statewide IPM Program.
These new educational sections have been reviewed by University of California experts in orchard management Flower Anatomy & Pollination This section presents the details of floral anatomy, pollination, fertilization, seed and fruit development.
