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Fertility and Competitiveness of Culex quinquefasciatus Males Irradiated in Nitrogen

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Male sterility and sexual competitiveness were evaluated after irradiation (Cesium-137 source) of 20- to 26-h-old pupae and 0- to 20-h-old adults of Culex quinquefasciatus Say in air and nitrogen (N2. The presence of nitrogen protected both stages against the induction of posttreatment sterility. In nitrogen, the exposure required for 98% sterility had to be increased from 8 kR in air to 20 kR. At lower irradiation dosages, nitrogen offered more protection of genetic tissues for pupae than adults. However, no improvement was observed in the mating competitiveness when air was replaced with nitrogen during pupal irradiation, and only marginal improvement was observed after adult exposure. Because of its deleterious effect on male competitiveness, irradiation may have limited usefulness as a method of sterilization for this species.

Document Type: Research Article

Publication date: August 1, 1983

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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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