Copulation and Its Duration Affects Female Weight, Oviposition, Hatching Patterns, and Ovarian Development in the Western Com Rootworm (Coleoptera: Chrysomelidae)

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To understand the relationship between copulation and ovarian development in the western com rootworm, Diabrotica virgifera virgifera LeConte, newly emerged virgin beetles were used to establish female groups of various copulatory durations. The results demonstrate that a mating of ≥1 h stimulates an increase in weight, egg-laying, and ovarian development. This stimulation in females mated for 1 h (none contained sperm in the spermatheca at the time of dissection) was transitory and lasted 1-2 wk. Females that mated for 2 h (contained sperm in the spermatheca at the time of dissection) were indistinguishable in weight, egg-laying, and ovarian development from females mated until natural completion; they were stimulated to a sustained mature ovarian state and were capable of laying eggs for at least 4-5 wk after mating. Unmated females of similar ages underwent limited ovarian development and rarely laid eggs.

Document Type: Research Article

Publication date: December 1, 1993

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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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