Insect Alert For

Corn Earworm

Risk Level:
No Risk
Affected Area:
No risk Full page
Alert Details

As southerly winds increase along with temperatures especially later in the week and next weekend, corn earworm migration risks do return to the forecast. Corn earworm moths are still active in scattered portions of the mid-south and southern states of the United States, but are losing their host plant availability in that area so the moths may fly north to find any remaining suitable hosts in the corn-growing region. Fresh market and processing growers who have crops intentionally planted and maturing later in the season are most vulnerable, and these growers should continue trapping efforts until harvest. Low risks are in the forecast from Wednesday night into Saturday mainly from Kansas, Nebraska, and eastern South Dakota as far east as the I-69 corridor in southern lower Michigan, Indiana, and western Kentucky, and as far north as central Minnesota and Wisconsin. Greatest concern lies in processing fields in Minnesota, Wisconsin, and also perhaps into northern Illinois and scattered portions of the southwestern Great Lakes where some fresh market crops may still be present at this point in the growing season.