Insect Alert For

Corn Earworm

Risk Level:
Affected Area:
Full page
Alert Details

South to southwest flow is expected to remain the dominant weather pattern across much of the corn-growing region this week. As a result, Low corn earworm migration risks are rather abundant in the forecast especially given that many processors and some fresh market growers still have crops at susceptible stages to damage this time of year. Low risks are predicted tonight into tomorrow mainly along and west of the I-35 corridor from northwest Missouri into western and central Iowa, southwest Minnesota, and western Wisconsin west into the Plains states as southerly winds increase ahead of the next developing low pressure system in the High Plains. Low risks continue in the forecast tomorrow night into Wednesday further east into Wisconsin and Illinois as southerly winds expand to the east. By later in the week and into the early portion of next weekend, Low risks remain in the forecast from the Plains as far east as the southern Great Lakes region as a potentially stronger low pressure system develops in the northern Rockies or adjacent High Plains region, sending stout southerly winds into much of the corn-growing region ahead of a cold front by that time. Growers with crops still at susceptible stages to damage should continue to monitor traps and scout fields as not only could there be old generations present in fields but new moths may still be arriving which may keep pressure on susceptible fields through harvest especially in processing and fresh market fields.