Insect Alert For

Corn Earworm

Risk Level:
Affected Area:
Full page
Alert Details

A rather fast-moving low pressure system and associated cold front is predicted to pass through the corn-growing region over the next several days. With the overall larger-scale weather flow still northwest to southeast dominated, corn earworm migration risks will be more isolated and thus, only Low risks are predicted through the period. The risk area is initially located in western Kansas and Nebraska tonight into tomorrow morning, but then spreads east into far southern South Dakota, southwest Minnesota, western Iowa, and western Missouri by tomorrow night into Friday morning. As low pressure moves east by the weekend, the risk area shifts east into the Mississippi River valley and eventually the southern Great Lakes and eastern Midwest as well. Growers should be advised that any flights during this period are expected to be isolated in nature primarily due to the predicted quick movement of the system and lack of a favorable source region, but traps should be monitored and continued scouting for larvae feeding from earlier flights and subsequent later generations is encouraged.