Insect Alert For

Corn Earworm

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

An active weather pattern may lead to scattered corn earworm moth flights into portions of the corn-growing region in the next few nights. Processing companies and fresh market growers should continue to monitor traps closely and apply treatments when/where warranted especially in fields with fresh silks. A Moderate corn earworm migration risk is in the forecast tonight into tomorrow morning across portions of eastern and northeast Iowa, far southeast Minnesota, southern Wisconsin, and northern Illinois where south to southwest winds are likely to be present and also where precipitation ahead of a cold front may result in insect drop-out. Low risks extend as far east as the I-75 corridor in southeast lower Michigan and northwest Ohio. Moderate risks continue in the forecast tomorrow night into Thursday morning as the cold front continues to move to the southeast. Southwest winds may lead to continued flights especially from source regions in Missouri and Illinois northeast into northeast Illinois, northern Indiana, northwest Ohio, and southern lower Michigan. Some moths may be observed as far northeast as southern Ontario, Canada and into western Pennsylvania. Once the cold front moves through, migration risks will be on the decrease but a Low risk is in the forecast Friday night into Saturday morning as another, potentially stronger, cold front moves through the corn-growing region. Low risks are found across northern Indiana, northern Ohio, southern lower Michigan, and into southern Ontario, Canada at that time.