Most reports indicate that infection occurs in the field while aflatoxin production can occur whenever the product is exposed to favorable conditions either in the field or in storage. The figures listed above were taken from several sources and in some cases represent compromises among findings. Drought is considered to be one of the major factors that predisposes corn and peanuts to infection by A. flavus . In 1977, drought stressed corn in the southeastern states was plagued with a high incidence of aflatoxin. In 1980, aflatoxin was reported in higher than normal levels in the Southeast as well as Texas, Missouri and even southern Illinois.
Corn is especially subject to aflatoxin problems when drought occurs.
Management Practices to Minimize Aflatoxin at Corn Planting and During the Season Select a regionally adapted variety. Use a balanced fertilization program designed for optimum yields. Select a planting date that has traditionally resulted in the highest yield on your farm or in your area. Follow normal cultural controls to limit damage by ear feeding insects including early planting dates. Attempt to best utilize your irrigation practices to deliver optimum water from silking stage to late dough stage.