Modeling the Effect of Temperature and Gossypol Concentration on Developmental Rate of Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae)
Author: THOMAS, W. M.
Source: Journal of Economic Entomology, Volume 84, Number 2, April 1991 , pp. 466-469(4)
Publisher: Entomological Society of America
Abstract:The interaction between temperature and gossypol concentration on Helicoverpa zea (Boddie) developmental rate was studied by rearing larvae on artificial diets containing different concentrations of gossypol (0-0.27% at 0.045% increments) at constant temperatures of 18.3, 23.9, 29.4, and 35.0ºC. Larvae reared on different concentrations of gossypol showed sigmoid developmental rate curves, with developmental rate decreasing as gossypol concentration increased. Response surface analysis showed a highly significant temperature x gossypol interaction for developmental rate. However, when the data were transformed to a proportion of the control (0% gossypol), there was no temperature effect or interaction. A quadratic regression equation was developed to describe the proportional change in developmental time as a function of gossypol concentration. Multiplying a biophysical model of poikilotherm development by the proportion of the control resulted in accurate prediction of developmental rate as gossypol concentration changed.
Document Type: Research Article
Publication date: April 1, 1991
- 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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