Insect Alert For

Corn Earworm

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

A cold front is predicted to work its way from northwest to southeast across much of the corn-growing region over the next few days. Very warm and humid weather will continue to its southeast along with south to southwesterly flow (outside of thunderstorm influences). An opportunity for scattered corn earworm moth flights is in the forecast tonight into tomorrow morning as these southerly winds increase as a warm front lifts northeast into the northern corn-growing region. A thunderstorm cluster is likely to develop along the I-94 corridor in western Minnesota and move southeast overnight. The greatest risk for migration will be up to and south and southwest of this cluster where winds will be less impacted. Moderate risks are in place from far northern Missouri into eastern Nebraska, Iowa, southeast Minnesota, southwest Wisconsin, and northern Illinois. Low risks extend as far east as southwest lower Michigan and into Indiana. No additional risks are predicted after midday tomorrow as northwest flow returns by late week and next weekend. Growers with crops at susceptible stages to damage from corn earworms are encouraged to monitor traps and scout fields over the next few days as some new moth flights are possible.