Insect Alert For

Corn Earworm

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

Overall weak southerly to southwesterly wind flow to the east of a low pressure system and attendant cold front in the northern Plains may lead to some isolated corn earworm moth flights especially west of Lake Michigan and the I-55 corridor in Illinois later today through tomorrow morning. The overall picture is complicated by an upper level low pressure system moving through the southern corn-growing region and into the Ohio River valley by tomorrow and Saturday which should disrupt better southerly wind flow further east. Low risks continue in the forecast tomorrow night into Saturday mainly from southern Kansas northeast to near Minneapolis, Minnesota and again east to near Lake Michigan and into eastern Illinois. Thereafter, the cold front and upper level low pressure system are expected to merge over the eastern corn-growing region with northerly winds and cooler temperatures for at least the beginning to middle of next week, resulting in little to no migration risk at that time. Growers with crops at susceptible stages to damage from corn earworm, however, should continue to monitor traps and scout fields as moths may be present now from recent flights.