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Tobacco Budworm: Effects of 60Cobalt Irradiation on Female Attractiveness and Mating Frequency

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Females of Heliothis virescens (F.), when irradiated as adults with doses of 60cobalt ranging from 10–50 krad and used as bait in sex lure traps in 1.8×1.8×5.5-m field cages, were at least as attractive as untreated females. Females, irradiated as pupae 4 days before eclosion, had reduced attractiveness (28% less) with a dose of 10 krad and a considerably greater reduction with a dose of 50 krad.

In laboratory tests, mating frequency as determined by spermatophore counts was affected similarly; average numbers of spermatophores per mated female were reduced 18% when pupae were irradiated at 30 krad and 41% when they were irradiated at 60 krad. However, there was no significant reduction in spermatophore numbers when newly eclosed adult females were irradiated with doses ranging from 10–60 krad.

Document Type: Research Article

Publication date: October 1, 1974

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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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