Insect Alert For

Corn Earworm

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

A low pressure cell and attendant cold front are predicted to advance east across the corn-growing region today into tomorrow. A rather narrow corridor of south to southwest winds is predicted to the east of the front and along and south of existing and expected precipitation areas later this evening and overnight. These southerly winds may result in a scattered corn earworm moth flight into a portion of the corn-growing region, especially from eastern Kansas and southeast Iowa east into Missouri and central and southwest Illinois where a Moderate migration risk is in the forecast. Lower risks extend north to near the Minnesota and Iowa border as well as into far southern Wisconsin and east into Indiana. Low risks continue mainly south of I-80 and west of the Indiana/Ohio border tomorrow night into Friday morning as weak southerly flow may result in a few isolated moth flights from source regions in the far southern Midwest and mid-south regions. No risk is predicted thereafter as a lack of focused, stronger southerly winds should preclude any migration. Growers located within the Moderate risk area are encouraged to monitor for the potential of new moths in the next several days. Elsewhere, continued larvae pressure from previous flights this growing season may continue to pose a threat to crops that are at a susceptible stage to damage so scouting is still recommended even though flights have been less numerous, or non-existent, in the past several weeks.