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Mist Application of Chemosterilants to Adult Male Culex pipiens quinquefasciatus1

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To determine the comparative effectiveness of 3 chemosterilants on male southern house mosquitoes, Culex pipiens quinquefasciatus Say, virgin males 4-days old were exposed to mists of apholate, tepa, and metepa in an 85:15 mixture of ethanol:glycerol with a modified Hoskins- Caldwell spray chamber. Twenty-four hours later these were combined with virgin females and maintained as small colonies. Life span was not altered, normal mating and oviposition occurred, and normal numbers of eggs were produced. The egg rafts were collected daily, isolated and identified, and subsequent hatch was deter- mined. Apholate proved to be the most active chemosterilant, followed by tepa and metepa in that order. A 2% concentration of apholate produced sterility of 95% or better. A 4% concentration of tepa and an 8% concentration of metepa were required to produce similar maltsterility. The use of such a rapid, simple, and consistent technique for applying chemosterilants directly to the test specimens permits valid comparisons of biological activity by negating such varied problems as unequal evaporation, polymerization of compounds, and tarsal uptake from residues.

Document Type: Research Article

Publication date: February 1, 1967

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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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