Insect Alert For

Corn Earworm

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

A favorable weather pattern for corn earworm migration is expected to be in place this week especially across the western and northwestern corn-growing region. Late planted and slower maturing crops especially in the upper Midwest are at highest risk this week especially where fresh silks and developing ears on corn and also other vegetable crops are still present. South to southwest winds are expected to blow north from source regions in Oklahoma into Texas through the period and may result in scattered moth flights. Moderate risks are in place tonight into Tuesday morning across portions of Kansas, Missouri, Nebraska, South Dakota, Minnesota, Iowa, Wisconsin, and Illinois. A weak cold front is expected to drop south through the Great Lakes region and upper Midwest into the central corn-growing region along I-80 by Wednesday and this should compress the primary migration risk to areas mainly in Kansas, southern Nebraska, southern Iowa, Missouri, central and southern Illinois, and western Indiana for Tuesday night into Wednesday. As the front lifts back north as a warm front later this week, Moderate risks return to the Plains and western/upper Midwest by Thursday night and continue into next weekend.