Apholate Chemosterilization of the Cereal Leaf Beetle1

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Apholate was found to be an effective chemosterilant for the cereal leaf beetle, Oulema melanopus (L.). When adults of both sexes were dipped in a 0.05% aqueous concentration for 30 seconds, 100% sterility was induced. When only males were treated, a 0.1% aqueous concentration was needed to effect complete sterility; longevity of treated males was reduced at the sterilizing dosage. Sterilized males retained their normal mating behavior, but early mortality reduced their mating effectiveness in comparison with the normal males. A ratio of treated males to untreated males of about 12:1 would be required to reduce egg viability to less than 1%. The early mortality of the treated males would necessitate frequent release of sterilized beetles. Histologic sections revealed no damage to the testes of males treated with 0.1% apholate, and motile spermatozoa were found in treated males 21 days after treatment.

Document Type: Research Article

Publication date: August 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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