During the past week, numerous calls have come in about stand reduction in corn, especially fields planted during the last days of April and the first days of May. In many parts of the state, fields planted at that time were inundated with rain for a whole week, and many seeds and seedlings succumbed to seed rots and seedling diseases. Samples of seedlings received at the ISU Plant Disease Clinic have shown typical symptoms of seed rot or seedling blight on the roots and mesocotyl. Seeds that failed to germinate were rotted, sometimes as a result of insect injury.
Iowa State University
Munkvold, Gary P. and Rice, Marlin E., "Stand reductions in corn due to fungal pathogens and insects" (2002). Integrated Crop Management News. 1845.
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