Missouri Pest Monitoring Network
Corn Earworm, Helicoverpa zea Boddie, emerge in April and are later joined by migratory moths in June. Corn earworm larvae usually feed at the ear tip. When disturbed they will either fight or curl into a C-shape. Intensive captures are indicated when at least 12 moths are captured over one night in pheromone traps.
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Identification and Field Scouting
Corn Earworm in Missouri in Missouri (G7110)
Caterpillars in your Garden & Yard (IPM1019)
Corn Insect Pests: a diagnostic guide (M166)
Missouri Pest Management Guide: Corn, Grain Sorghum, Soybean, Winter Wheat (M171)
Newsletter Articles for Corn Earworm
Corn Earworm (Soybean Podworm) in Soybean (09/13/10)