Insect Alert For

Corn Earworm

Risk Level:
Affected Area:
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Alert Details

Until a cold front passes through much of the corn-growing region late in the Labor Day weekend, the risk for isolated to scattered corn earworm migration events will continue as light to occasionally moderate southerly winds and potentially some scattered rains may lead to insect flight and drop-out. Low risks are in place tonight mainly across the western corn-growing region from Kansas into Nebraska, southern South Dakota, southwest Minnesota, western Iowa, and far western Missouri as southerly winds are expected to be more focused in this area due to a weak cold front wavering near the I-80 and I-74 corridors from eastern Iowa southeast into Illinois and south of the Great Lakes region. By tomorrow night into Saturday, however, Moderate risks return to the forecast especially across portions of Kansas, Nebraska, South Dakota, Minnesota, Iowa, and Missouri with Low risks as far east as Wisconsin and Indiana as the front lifts back north as a warm front and southerly winds increase and expand northeast. The most widespread migration risk comes Saturday night into Sunday as the cold front moves southeast through much of the corn-growing region. Moderate risks are predicted to the east of this front and include portions of Kansas, Nebraska, South Dakota, Minnesota, Iowa, Missouri, Illinois, Wisconsin, Michigan, Indiana, and Ohio. Risks decline sharply thereafter as northwest winds and much cooler weather return to the region. Growers with late planted and slower maturing crops are urged to pay special attention to their crops in the next week as a late season flight may be in store over the course of the next several days.