Insect Alert For

Corn Earworm

Risk Level:
Affected Area:
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Alert Details

Corn earworm migration risks will be limited for the next couple nights as west to northwest flow continues to be dominant across much of the corn-growing region. By mid-week, however, the overall weather pattern is expected to shift from west/northwest back to southwest and southerly. As a result, winds will shift back to the south and provide at least an isolated risk of corn earworm migration. Initially, the risk area is predicted to remain in the Plains from Kansas into Nebraska and South Dakota, but eventually the risk is expected to spread east into Minnesota, Iowa, and Missouri by the end of the week and into the early portion of next weekend. Since we are still in mid-May, corn earworms are not a threat to crops at this stage so the risk level is kept low, but it is still important to monitor these early flights for potential later generations that may affect crops later in the growing season.