Aflatoxin is a major concern with corn harvest.
Aflatoxin is a natural fungus that is deadly in small quantities. It has devastated the corn crop in Louisiana. Most grain elevators won't accept corn if it gets above 20 part per million of aflatoxin. That is an extremely small concentration, and amounts to about two or three grains of corn in 20 bushels. Most farmers in Mississippi report fair, good or excellent conditions for major crops such as cotton, rice, peanuts, soybeans, and hay.