The Permanent and Cumulative Effect of Tepa-Induced Sterility in Male Japanese Beetles1,2

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Abstract:

The permanence of the chemosterilant effect of tepa on male Popillia japonica Newman was investigated in 2 experiments. In the first, tepa-treated male beetles were confined with virgin female beetles, eggs were collected at various intervals, and sterility was determined for successive periods. In the second, successive groups of females were paired with a group of treated males and the fertility of eggs deposited by the females determined. In neither study was there evidence of a decline in sterility or indication that the tepa-induced sterility of the male was not permanent.

When male beetles were topically treated with consecutive daily increments of tepa, the fertility of eggs obtained from paired females indicated that the effects of the additive doses were cumulative.

Document Type: Research Article

Publication date: August 1, 1968

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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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