Insect Alert For

Corn Earworm

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

A progressive weather pattern is predicted across much of the corn-growing region this week. The result is expected to be an increase in temperatures and moisture levels as the week progresses, with a cold front passing through much of the corn-growing region by late week. Along and ahead of this cold front passage, however, we may have an opportunity for scattered corn earworm moth flights, much like we saw mid-late last week, and some of the same areas that saw flights last week may see additional flights this week. Low risks are in place tonight into tomorrow morning mainly west of I-55 and Lake Michigan and as far north as I-94 in North Dakota and Minnesota as mainly light south to southwest flow envelops much of the central and western corn-growing region. The Low risk then focuses back across the Plains and western Midwest tomorrow night into Wednesday morning ahead of a developing low pressure to the east of the Rocky Mountains. Moderate migration risks are then in the forecast Wednesday night into Thursday across portions of Nebraska, eastern South Dakota, Iowa, Minnesota, western Wisconsin, and also into southeast North Dakota as south to southwest winds along with precipitation increase by that time. Moderate risks then focus from central Iowa into southeast Minnesota, Wisconsin, and northern Illinois Thursday night into Friday morning as a cold front pushes southeast. Low risks then cover much of the eastern corn-growing region to the east of I-55 in Illinois Friday night into Saturday morning. Growers are encouraged to continue to scout fields and monitor traps especially if crops are at a susceptible stage of growth.