Above normal rains in September have slowed field crop dry-down. Coupled with early season drought in South Central and Southeast Iowa and above-average rainfall in the Northwest, there is high risk of reduced grain quality. Corn and soybeans remaining in the field are currently exposed to excessive moisture that encourages the growth of ear molds. Moldy kernels are counted in total damage, thereby affecting the overall grade of the corn. Additionally, if the fungus is capable of producing mycotoxins, affected grain may be subject to marketing restrictions.
Iowa State University
Hurburgh, Charles R. and Robertson, Alison E., "Mycotoxins and Deterioration in the 2018 Corn Crop" (2018). Integrated Crop Management News. 2499.
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