Insect Alert For

Corn Earworm

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

A very persistent weather pattern featuring high pressure across the eastern corn-growing region and a series of stationary low pressure systems in the northern Plains and southern Canada will continue right into the holiday weekend. In between these two features, south to southwest winds will be common in a corridor from Kansas and Missouri north into Nebraska, Iowa, eastern South Dakota, Minnesota, and western Wisconsin. Despite a favorable weather pattern for migration, only Low risks are in the forecast as many crops are now past critical growth stages and/or corn earworm populations are already high, at least in scattered areas and where crops are still at a susceptible stage to damage (mainly fresh-market and processing growers). Daily Low risks are in the outlook through the next five nights across the aforementioned states (through Sunday night and Monday morning). Additional Low risks may extend into portions of North Dakota and northwest/central Minnesota, as well, with Low risks shifting east into more fields in Wisconsin and eventually Illinois by Sunday night into Monday as a cold front begins to work southeast. Growers, especially those with crops still at susceptible stages, should monitor traps and corn earworm populations/larvae closely in the next week.