Insect Alert For

Corn Earworm

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

Corn earworm migration risks remain in the Low category for the next several nights as southerly wind flow increases and expands from the Plains further east into the corn-growing region. The overall weather pattern by late week and into the weekend, however, is likely to be complicated by an upper level low pressure system moving through the southern corn-growing region into the Ohio River valley and eventually eastern Great Lakes region. Precipitation and wind flow around this upper level low pressure system is likely to impact southerly flow especially east of the Mississippi River, so the primary migration risk area is west of the Great Lakes. Low migration risks are predicted tonight into tomorrow mainly west of the Mississippi River, with the risk then spreading east into Wisconsin and Illinois by late tomorrow and continuing into Saturday. After Saturday, a fairly sharp cold front is expected to pass through the entire region, limiting any further migration risk early next week. Growers with crops at susceptible stages to corn earworm damage should continue to monitor traps and scout fields as recent flights may have occurred especially this past weekend and some of these moths may now be appearing in traps if not already.