Dr. Kenney Seebold, UK Plant Pathologist for Commercial Vegetables, announces that the North American Plant Disease Forecast Center indicates the potential for movement of downy mildew on cucurbits from west TN into western KY this week. Cucurbit growers should be following a regular fungicide program. Seebold says all growers in the state would benefit from this, not only against downy mildew but also things like powdery mildew, anthracnose, Cercospora, Alternaria, and gummy stem blight. The Extension Office has information on recommended products; in general, chlorothalonil products will make a good choice for the “backbone” of a spray program.
Let me know if you have any questions, and if you find downy mildew.
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