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Northern Corn Leaf Blight

Northern corn leaf blight caused by the fungus Exerohilum turcicum is an increasingly important disease in corn. Northern corn leaf blight  can cause yield loss if it develops before or during the tasseling and silking phases of corn development. Late infections may have less of an impact on yield. 
Northern corn leaf blight is favored by wet humid cool weather typically found later in the growing season. Spores of the fungus that causes this disease can be transported by wind long distances from infected fields. Spread within and between fields locally also relies on wind blown spores.
The tan lesions of northern corn leaf blight are slender and oblong tapering at the ends ranging in size between 2.54cm to 15.24cm. Lesions run parallel to the leaf margins beginning on the lower leaves and moving up the plant. They may coalesce and cover the enter leaf. Spores are produced on the underside of the leaf below the lesions giving the appearance of a dusty green fuzz.

Azoxystrobin 25% + Tebuconazole 50% WP

Pyraclostrobin 25% SC

Epoxiconazole 10% + Pyraclostrobin 25% SC

Tebuconazole 50% + Trifloxystrobin 25% WG