Insect Alert For

Corn Earworm

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

An active and generally warmer than average early to mid-week weather pattern is expected across a good portion of the corn-growing region, and this could lead to some scattered late-season corn earworm moth flights especially as moths look for suitable hosts with mid-south and southern corn-growing region corn now maturing and becoming less attractive hosts. Moderate migration risks are in place tonight across portions of Iowa, southeast Minnesota, Wisconsin, and northern/central Illinois with Low risks as far east as the I-75 corridor in lower Michigan, Indiana, and western Ohio. Low risks are then in the forecast tomorrow night into Wednesday mainly along/south of I-90 but north of I-70 as much of the region remains in weaker southerly flow in between weather systems. Moderate risks, however, return to much of the corn-growing region from Nebraska and Minnesota east into the Great Lakes by late week as a strong cold front moves through the region. Growers with crops still at susceptible stages to damage, especially fresh market and processing growers but also potentially the latest planted field corn growers, should continue monitoring traps and scout fields as new moths may appear in the next week.