The larvae of four important Heliothis spp. are known to be serious pests of cotton, tobacco, corn, and other food crops (Hardwick 1965 and Kogan et al. 1978). The species are: H. zea (Boddie), the bollworm; H. virescens (F.), the tobacco budworm; H. armigera (Hbn.), The American bollworm; and H. puntigera (Wallengren).
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Wolfenbarger et al. (1981) studied this question.