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Sensitivity of Detection Trapping Systems for Mediterranean Fruit Flies (Diptera: Tephritidae) in Southern California

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Release-recapture studies were conducted in southern California to determine the probability of capturing Mediterranean fruit flies, Ceratitis capitata (Wiedemann), in standard trapping arrays used to detect and delimit introduced populations. Two tests were conducted in a 1O.4-km2 area of Orange County that contained a total of 40 trimedlure-baited Jackson traps (10 traps per 2.6 km2 [1 square mile]). Radiosterilized flies were marked with one of four colors and released at four different distances from each trap. Numbers of flies released at each point were adjusted so that the nominal density throughout the test area was 25 (first trial) or 12 (second trial) flies per hectare. In both trials. percentage of flies recaptured was ≍0.6% overall and, in general, was related inversely to the distance from the release site to the trap. In other tests, 23-27% of flies were recovered when released in Orange County within 0.26-km2 plots that contained 100 trimedlurebaited yellow sticky panels. Using results of these and a previously published study, simple mathematical models based on binomial probability theory indicate that arrays of 10 Jackson traps per 2.6 km2 would detect high proportions of relatively small, stable infestations of C. capitata within several generations. Arrays of 1,000 yellow panel traps per 2.6 km2 essentially would detect all viable infestations within one generation and provide a sensitive tool for confirming eradication after treatment of infested areas.

Document Type: Research Article

Publication date: December 1, 1994

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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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