Insect Alert For

Corn Earworm

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Alert Details

An increasingly hot and humid air mass is expected to develop and move into at least the western and central corn-growing region in the next several days. Southerly winds will accompany this heat dome, and corn earworm migration risks will be on the increase and in the forecast on a nightly basis likely into later next week until a cold front moves through. Growers should be aware that elevated migration risks are likely in the forecast at some point mid-late next week prior to this cold front passage, so close monitoring of traps and scouting of fields is encouraged as isolated and then potentially scattered moth flights are looking more likely in the next week. Low risks initially focus mainly west of the Mississippi River tonight into tomorrow, including portions of western Wisconsin. Low risks then slowly move east into the southwestern Great Lakes and Mississippi River valley by tomorrow night into Sunday, and then focus mainly along/south of I-90 early next week before expanding north ahead of the cold front expected late next week.