Mating, Oviposition Patterns, Fecundity and Longevity of the Western Corn Rootworm
Author: Hill, Roscoe E.
Source: Journal of Economic Entomology, Volume 68, Number 3, June 1975 , pp. 311-315(5)
Publisher: Entomological Society of America
Abstract:Field-collected mating pairs of Diabrotica virgifera LeConte were maintained under controlled laboratory conditions. Females lived an average of 78.2 days, had a mean preoviposition period of 12.2 days, and a mean fecundity of 1087 eggs laid in 13.5 clutches over a reproductive period of 76.4 days. Intervals between clutches averaged 5.0 days through the 8th clutch or to 75% oviposition. Females reared from field-collected soil and mated in the laboratory laid fewer eggs. Males lived an average of 102.4 days. Females copulated only once; males will mate with several females. Egg-laying started at a high level with the 3rd clutch averaging largest and, for each female observed, one of her 1st 4 clutches was the largest. On a seasonal basis, 24% of the potential egg population were laid by Aug. 25, and 57% by Sept. 10, 83% by Sept. 30, and 90% by Oct. 10. Mating apparently speeds ovarian development. Ovaries of active gravid females fluctuate between ratings 4 to 3 to 4 etc., and this fact should be considered in interpretations of field populations examined for ovarian development.
Document Type: Research Article
Publication date: June 1975
- 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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