The warm, wet conditions that have existed across much of Iowa over the past couple of weeks have been favorable for sporulation and dispersal of the anthracnose fungus Colletotrichum graminicola, and sure enough, symptoms of anthracnose leaf blight are starting to be seen on the lowest leaves of corn seedlings in the fields, particularly in corn-following-corn fields. In addition, the fungus often infects leaves showing potassium deficiency.
Iowa State University
Robertson, Alison E., "Anthracnose leaf blight starting to show up in corn" (2007). Integrated Crop Management News. 1060.
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