Insect Alert For

Corn Earworm

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

Moderate corn earworm migration risks are predicted tonight into tomorrow across portions of Nebraska, South Dakota, Minnesota, Iowa, and Wisconsin with Low risks east to near Lake Michigan and into Illinois. An area of low pressure is organizing in the northern Plains and southern Canada with a cold front expected to advance east through the Dakotas by tomorrow. Southerly winds ahead of the front are expected to increase, and may lead to scattered moth flights from mid-south source regions. Low risks continue in the forecast tomorrow night from the Plains east into the southwestern Great Lakes region, but Moderate risks return to the forecast Sunday night into Monday as the cold front continues to move southeast, with the primary area of concern in eastern Iowa, far southeast Minnesota, Wisconsin, northern/central Illinois, northern Indiana, and southwest lower Michigan. Low risks extend as far east as southern Ontario, Canada and into Ohio. Growers with crops at susceptible stages to damage should monitor traps and scout fields next week as new moths are expected to arrive in a scattered fashion this weekend across many fields in the northern corn-growing region.