Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

Low corn earworm migration risks are in the forecast across at least a portion of the corn-growing region for the next five days as the overall weather pattern appears to be transitioning into a zonal (west to east) or southwest flow. Low pressure is likely to move through the heart of the corn-growing region in the next few days, and southerly winds to the east of the low pressure may provide an isolated migration risk across the eastern Plains into the Mississippi River valley tonight into tomorrow morning. The risk shifts east with the low pressure system into the Mississippi River valley, eastern Midwest, and southern Great Lakes region tomorrow night into Sunday morning. A rather broad Low risk is in place thereafter mainly to the south of I-80 as new low pressure begins to organize in the western Plains and a primarily light but persistent south to southwest wind remains in place across the southern half of the corn-growing region. Grower should be advised that some isolated moth flights will be possible over the next several days, and that the risk for potentially larger scale flights may exist if the predicted weather pattern holds moving into next week.