Bulletin #2441, Potato Late Blight (PDF) Extension Crops Specialist Steven B. Johnson For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. Late Blight History Few plant diseases can rival the widespread misery and despair produced by potato late blight. Potato late blight is caused by Phytophthora
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