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Gray Leaf Spot
Gray leaf spot is caused by the fungus Cercospora zeae-maydis and favored by wet humid weather. Additionally, it is favored in situations with reduced tillage and continuous corn.
Airborne spores are spread locally and regionally from corn debris.
Gray to tan, rectangular lesions on leaves, leaf sheaths, or husks. Spots are opaque and long (up to 5cm). Lower leaves are affected first, usually not until after silking. Lesions may have a gray, downy appearance on the underside of leaves where the fungus sporulates.The organism thrives in extended periods of warm, overcast days and high humidity. Gray leaf spot has become more prevalent with increased use of reduced tillage and continuous corn.
Tebuconazole 50% + Trifloxystrobin 25% WG
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