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P32-Labeling of Common Malaria Mosquitoes: Assimilation by Larvae and Retention and Transfer During Mating1,2,3

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Abstract:

Larvae of Anopheles quadrimculatus Say exposed to P32 in distilled water (0.25-0.5 µCi/ml) assimilated about 4½-6 times as much P32 in the same period as larvae exposed to the clement in infusions of desiccated hog liver and dried brewers' yeast. Addition of treated food (0.5µCi/mg) did not increase the uptake of P32 unless the larvae were allowed to feed on it at least 2-3 days before they pupated. Longer exposures and greater doses generally resulted in proportional increases in the amount of P32, found in the adults. About 20-30% of the radioactivity in the larval stage was retained by 5 to 14-day-old adults. Labeled males transferred about 0.065% of their total radioactivity to females in the semen during copulation. When 280 tagged males and 560 laboratory-reared wild females were released into an area where small populations of A. quadrimaculatus were indigenous, 3 of 222 females collected during the next 5 days were radioactive (7-25 count/min above background). Thus, the laboratory males were capable of inseminating wild females.

Document Type: Research Article

Publication date: August 1, 1969

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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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