Insect Alert For

Corn Earworm

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

A favorable pattern for scattered corn earworm moth flights is predicted to envelop much of the central and northern corn-growing region over the next two nights. A cold front will be pushing southeast from the Plains and upper Midwest through the corn-growing region and eventually will likely stall in Missouri, southern Illinois, and into the Ohio River valley by late week. As this front pushes southeast, however, south to southwest winds ahead of it along with at least scattered precipitation areas should lead to scattered moth flights in Nebraska, western and central Iowa, eastern South Dakota, and central and southern Minnesota tonight into tomorrow morning. Moderate risks are in place in these areas. Tomorrow night into Friday morning, Moderate risks continue from eastern Iowa into far southeast Minnesota, Wisconsin, northern and central Illinois, northern Indiana, northern Ohio, central and lower Michigan, and also into far southwest Ontario, Canada as the front continues pushing southeast. No risks are then predicted through midday Sunday as northwest flow should develop after the passage of the front although some lingering southerly flow will be possible in/near source regions in Kansas and Missouri. Low migration risks are then back in the forecast mainly west of US 65 in western Missouri, Iowa, and Minnesota by Sunday night into Monday morning as southerly flow commences once again ahead of the next developing low pressure system. Growers located in the Moderate risk areas should monitor traps closely over the next several days and be prepared to take any necessary action based on crop stage.