A Method of Estimating the Size of Native Populations of Oriental, Melon, and Mediterranean Fruit Flies1 to Establish the Over flooding Ratios Required for Sterile-Male Releases2

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Formulas for estimating the native adult populations of the oriental fruit fly, Dacus dorsalis Hendel, and the melon fly, D. cucurbitae Coquillett, and for relating the estimates to the rate of release of sterile males required for an eradication program were developed in Hawaii and the Marianas Islands. A 3rd but untested application was worked out for the Mediterranean fruit fly, Ceratitis capitata (Wiedemann). The 1st formula uses the means of the daily catches of the native male population in standard traps baited with the appropriate synthetic lure (methyl eugenol, cue-lure, and trimedlure). This catch of males per trap per day, multiplied by 2 to account for the females, is multiplied by the period of trapping (in days), the area trapped (square miles), and the trap efficiency (an empirical estimate equal to the number of noncompetitive traps per square mile that would he needed to exhaust the male population before any emerging fly could be become sexually mature). The necessary rate of release (the 2nd formula) is then obtained by multiplying the product of the 1st formula by the desired over flooding ratio (20). However, any significant losses that occur during release of the sterile flies must he added into the formula by multiplying by a loss compensation factor.

Document Type: Research Article

Publication date: February 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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