Insect Alert For

Corn Earworm

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

The weather pattern across much of the corn-growing region in the next week is predicted to be favorable for corn earworm migration at least on an isolated basis. Many crops are now past susceptible stages to damage except for some processing and fresh-market fields to the north of I-80, so any migration risks will be focused in these areas. Low risks are in place tonight into Tuesday morning mainly west of a line from south of Des Moines, Iowa to Eau Claire, Wisconsin as southerly winds to the east of a cold front focus in this region. The risk spreads east into the southwest Great Lakes region and includes portions of Nebraska, South Dakota, Minnesota, Iowa, northern Illinois, Wisconsin, southwest Michigan, and western Indiana as high pressure moves further east and allows southerly winds to expand eastward. A cold front is expected to begin pushing through the corn-growing region by late week. To the east of the front, south to southwest winds should increase and may become gusty especially across portions of the Plains and western Midwest. Low corn earworm migration risks, mainly for the threat of isolated to scattered moth flights into the remaining fields still at risk, are in place across much of the corn-growing region to the north of I-80 through Friday morning.