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Effects of Some Chemosterilants on the Viability of Eggs, Fecundity, Mortality, and Mating of the Cabbage Looper

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Tepa, metepa, or apholate fed to moths of the cabbage looper, Trichoplusia ni (Hübner), induced variable degrees of sterility. Male moths fed tepa did not mate so frequently as untreated males.

Tepa applied as a spray induced complete sterility in cabbage looper males treated when 1–4 days old. Untreated female moths mated to males sprayed with tepa produced about the same number of eggs as females of untreated pairs. Egg viability decreased with increasing concentrations of tepa. Tepa-sprayed males mated as frequently as untreated males, but abnormal copulations in which males were unable to separate from females occurred more frequently after tepa treatment than in groups of untreated males. Females sprayed with tepa laid fewer eggs than females of untreated pairs. females sprayed with concentrations of 2 and 4% tepa laid few or no eggs and none hatched. Mortality of both male and female moths sprayed with tepa was higher at the end of the 8-day test period than that of untreated moths. Metepa and apholate were less effective than tepa in sterilizing either sex.

Document Type: Research Article

Publication date: February 1, 1966

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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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