Insect Alert For

Corn Earworm

Risk Level:
Moderate Risk
Affected Area:
Full page
Alert Details

Moderate corn earworm migration risks are in the forecast tonight into tomorrow across portions of Missouri, eastern Iowa, Illinois, and southern Wisconsin as south to southwest winds, along with very warm to hot temperatures, are expected in the next 24 hours ahead of a cold front that should move southeast through at least a portion of the corn-growing region by Saturday. A favorable pattern for migration is expected, thus scattered moth flights especially in and near the Moderate risk area will be possible. Low risks extend from Kansas and eastern Nebraska as far east as the I-75 corridor in Kentucky, Ohio, and southeast lower Michigan, and as far north as Minnesota, central Wisconsin, and portions of central lower Michigan, as well. Less favorable winds are expected by late Friday into Saturday, with most migration probabilities focusing along and south of the I-70 corridor. Low risks then return to a good chunk of the corn-growing region by early next week once southerly winds return to the area ahead of the next potential cold front. Growers are encouraged to monitor traps and scout fields as new moths are likely to appear in the next week in many areas but especially in the southeastern/eastern two-thirds of the corn-growing region.