Effect of Chemosterilants on Fertility of Cabbage Loopers

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Abstract:

Experiments conducted from 1961 to 63 at Riverside, Calif., to determine the effects of apholate, tepa, and metepa on reproduction of the cabbage looper, Trichoplusia ni (Hübncr), showed that male moths feeding on apholatc and tepa were sterilized by lower dosages than females. Males were sterilized when fed 0.06% apholate or 0.02% tcpa solutions whereas 0.25% apholate or 1% tepa was necessary to induce complete sterility in females. Neither chemical appeared to affect male longevity.

Male moths exposed for 2 hr on residues from aqueous solutions of 4%, 8%, or 16% tcpa were completely sterilized, but residues from aqueous solutions of 16% or 32% metepa were necessary to produce the same effects. Male moths were sterilized after 15 min or longer on glass surfaces treated with 8% tepa. Exposure to 18-day-old residues from 8% tepa also produced complete sterility. Residues up to 38 days of age continued to produce a high degree of sterility.

Document Type: Research Article

Publication date: August 1, 1965

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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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