Insect Alert For

Corn Earworm

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

Moderate corn earworm migration risks are in the forecast for the next three days across a large portion of the corn-growing region. While corn is not necessarily at a critical growth stage where damage from corn earworm may occur, host plants may serve as breeding grounds for any migrating first generation moths in the next week. Moderate risks tonight into Thursday morning are present from Kansas, Nebraska, and far southeast South Dakota eastward into southwest Wisconsin and Illinois as south to southwest winds increase ahead of a cold frontal boundary. As the frontal boundary moves east Thursday into Friday, the Moderate risk area also shifts to the east and includes a large portion of Missouri, Illinois, southeast Wisconsin, southern Michigan, Indiana, western Ohio, and western Kentucky. Moderate risks continue on Day 3 (Friday night into Saturday morning) especially east of I-57, or from eastern Illinois eastward into Ohio. Growers across much of the corn-growing region will likely see at least scattered increases in corn earworm moth counts in the next week, especially where the Moderate risk area exists.