Ultrasensitive sound detection equipment was evaluated for identifying larvae of the oriental fruit fly, Dacus dorsalis Hendel (Diptera: Tephritidae), in papaya (Carica papaya L.). In each of the eight laboratory tests, 25 fruit were artificially infested at a rate of 20 eggs per fruit; another 25 fruit were used as controls. After larval eclosion, each fruit was examined daily for 2 min using a computer program developed to recognize larval feeding. Accuracy in detecting infested fruit approached 100% 5 d after fruit infestation. The system correctly identified control fruit ca. 85% of the time until the sixth day, when tissue deterioration also produced signals. Factors causing false positives and problems with implementing the system in the laboratory are discussed.
Document Type: Research Article
Publication date: June 1, 1988
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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.