Insect Alert For

Corn Earworm

Risk Level:
Affected Area:
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Alert Details

A quick-moving low pressure system and attendant cold front will move southeast through the corn-growing region in the next 24-36 hours. A brief window of south to southwesterly winds in advance of the front will provide a Low corn earworm migration risk tonight into Friday morning primarily from central Kansas and eastern Nebraska east into Illinois. The risk shifts east into the southern Great Lakes region and eastern Midwest with the cold front tomorrow night into Saturday morning. Another low pressure system is predicted to develop across the High Plains this weekend and then move southeast into the Midwest. There are still some uncertainties with the track of this low pressure system but Low risks are in place across the southwestern corn-growing region from southern South Dakota southeast into Nebraska, western Iowa, Kansas, and Missouri for Sunday night into Monday and then generally between I-35 and I-75 to the south of US 20, or from central Iowa into western Ohio Monday night into Tuesday. The source region for this event is much more favorable for migration especially into the southern Midwest early next week, and upgrades to the risk level may be needed by that time. Growers all across the corn-growing region should be on the lookout for 2nd generation moth presence in the next week or so as well.