Wednesday, May 2nd 2012 — Corn Earworm

2012_5_2_CEW_day1
Red: high risk, Yellow: moderate risk, Green: low risk, Brown: insect source region
How to Read the Maps

A continued active weather pattern is expected through the balance of the forecasting period. South to southwest winds are expected to be persistent from source regions in Texas, Oklahoma, Arkansas, and Louisiana right into the heart of the corn-growing region for the next several days. While some variations in the location of the strongest wind corridors are likely, the overall theme will be the chance for isolated corn earworm flights to the north. The risk area tonight into tomorrow morning is centered slightly further south than last night, mainly across Kansas, Missouri, Iowa, Illinois, and Indiana. The risk area shifts east Thursday night into Friday morning into the eastern Midwest and southern Great Lakes region as a cold front pushes slowly southeast. By the extended period (late week into early next week), a new area of low pressure is likely to develop across the Plains states and a warm front should serve as the dividing line between cooler air to the north and warmer air to the south (roughly between I-70 and I-80). Low risks continue mainly west of the Illinois/Indiana border and south of I-80 during this time.

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Corn Earworm

CEW thumb

Corn Earworm (Helicoverpa zea) Corn earworm is found throughout North America except for northern Canada and Alaska. Normally, corn earworm does not overwinter successfully in the northeastern United States. It is known to survive as far north as about 40…

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