Insect Alert For

Corn Earworm

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

Corn earworm migration risks are in the forecast tonight into tomorrow mainly south of I-90 and west of I-57, or from Kansas, Missouri, and southern Illinois as far north as South Dakota, Minnesota, and Wisconsin, as overall weak southerly wind flow covers this region. A slightly stronger push of winds may occur in Kansas and Missouri but overall, risks remain in the Low category given the overall pattern. Low risks continue in the forecast tomorrow night into Thursday from eastern Kansas, Missouri, and Iowa as far east as Indiana and western Kentucky as a weak cool front moves east. Northwest flow briefly takes over late week and into the first part of the weekend, but southerly winds return at least for a time by later Saturday into Sunday ahead of a potential weather system. Low risks are back in the forecast by that time mainly across the Mississippi River valley and into the southern Great Lakes and eastern corn-growing region, but the lack of longer duration or stronger southerly winds precludes higher risks at this time. Growers are encouraged to monitor traps and scout fields, especially given crop stage and time of year, as new moths likely arrived in some areas last week and additional flights, albeit more isolated, are expected in some fields this week, as well.