Indices of Seasonal Populations of the Adults, Eggs, and Larvae of the Corn Earworm 1

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Abstract
The numbers of adults of the corn earworm (Heliothis zea (Boddie)) taken from light traps were not directly related to the number of eggs recorded on the silking ears of contiguous seasonal plantings. The seasonal egg and larval populations and the degree of injury per ear resulted in U-shaped curves. Optimum period for sweet corn to mature for least corn earworm injury per ear at Faison, North Carolina, was July 10 to 20. Stowell''s Evergreen was more severely injured by the corn earworm than Golden Regent. Some of the difference in injury between these two varieties may be attributed to a differential in attractiveness for oviposition.

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