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Cotton-Plant Pigments as a Source of Resistance to the Bollworm and Tobacco Budworm

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Three pigments of the cotton plant Gossypium hirsutum were incoporated in the artificial diet of larvae of the bollworm, Heliothis zea (Boddie), and the tobacco budworm, Heliothis virescens (F.), to determine their effects on development. Gossypol was equally toxic to the bollworm and the tobacco budworm. Less than 30% of the larvae of both species reached the pupal stage when the diet contained 0.2% gossypol. Quercetin inhibited the growth of bollworm larvae, but there was relatively little mortality at concentrations below 0.8%. However, this chemical killed more than 70% of budworm larvae at the 0.1% concentration. Rutin was found to be less toxic to both species than gossypol or quercetin. However, it was more toxic at the higher dosages to the budworm than to the bollworm. The feasibility of increasing the gossypol and quercetin content in the cotton plant is discussed.

Document Type: Research Article

Publication date: February 1, 1966

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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