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Developmental Periods for Boll Weevils1 Reared at Several Constant and Fluctuating Temperatures2

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Developmental periods of 5 strains ofAnthonomus grandis Boheman from cultivated cotton ranged from 88 days at 15 to 17 days at 30; a temperature of 35 increased the period to 17.5 days. Developmental periods of I strain of thurberia weevils, A. grandis thurberiae Pierce, ranged from 72.5 days at 15 to 17.5 days at 30; a temperature of 35 extended the developmental period of the weevils to 18.5 days. Temperatures above an undetermined temperature between 30˚ and 35 prolonged the developmental period of all strains. The deleterious effect of high temperatures partially explains the absence of boll weevil populations in Arizona in midsummer. Rearing at fluctuating temperatures did not increase the time required for development over that required at the constant temperatures if the heat input was similar and temperatures did not exceed 30.

Document Type: Research Article

Publication date: December 1, 1969

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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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