Fig. 1. Symptoms of Phytophthora disease in walnut trees: dark, water-soaked lesions with irregular margins.
Sac Valley Orchards
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Your source for orchard news & information in the Sacramento Valley
Phytophthora Root and Crown Rot & Paradox Canker Disease in Walnuts
Fig. 1. Symptoms of Phytophthora disease in walnut trees: dark, water-soaked lesions with irregular margins.
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