Insect Alert For

Corn Earworm

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

Corn earworm migration risks return to the forecast beginning as early as tomorrow night and lasting through the weekend as southerly flow returns to at least the western portion of the corn-growing region ahead of the next cold front. This cold front is not slated to pass through the area until late in the weekend or early next week, so a period of several days of south to southwest flow could lead to some mainly isolated corn earworm moth flights from Kansas and Missouri northward as far as eastern South Dakota and Minnesota tomorrow night into Thursday morning, with the threat spreading eastward to Lake Michigan and into Illinois by Thursday night into Friday morning. Over the weekend, confidence does lower a little bit with respect to just exactly when the front moves southeast, but all indications this morning show the front passing through sometime late Saturday in the far northwest portion of the corn-growing region into Monday across the southern Great Lakes and eastern corn-growing region. Low risks focus along/east of the front during this time. Growers with crops at susceptible stages to damage should monitor traps and scout fields regularly as some new moths may have arrived this past weekend and prospects for at least a few more moths late this week into the weekend are there.