Insect Alert For

Corn Earworm

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

A strong cold front is expected to pass through much of the central and eastern corn-growing region over the next 24-48 hours. East of this front, warm to hot conditions and gusty southerly winds are expected today into tonight until the front passes, and additional corn earworm moths may migrate north on these winds. Moderate risks are found across portions of eastern Iowa into northern and central Illinois, Wisconsin, Indiana, Ohio, lower Michigan, and into southwestern Ontario, Canada. It should be noted that many areas in the Great Lakes region already have some scattered high corn earworm moth activity from observed moth flights in late August, so a new flight may keep moth counts high in some areas or in those fields that did not see the August flights, new moth captures may be observed. Little to no additional migration risk is predicted after tomorrow for the rest of this week and into the weekend. Fresh market and processing growers should continue regular scouting, trapping, and treatment plans until moth and egg-laying activity subsides and/or until harvest.