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Suspected Sex Pheromone Glands in Three Economically Important Species of Dacus1,2

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Recent work demonstrated the presence of a sex pheromone g-land associated with the rectum of the male Queensland fruit fly, Dacus tryotni (Froggatt), which produced substances attractive to female files. Similar rectal gland complexes, which are described, also are present in at least 2 other species of male tephritids, the oriental fruit fly, D. dorsalis Hendel, and the olive fruit fly, D. oleae (Gmelin). which correspond closely in their anatomical and histological makeup to that described for D. tryoni. The g-land consists of a reservoir occupying the right lateral posterior one-third of the rectal sac, and a small bulbular secretary sac opening into the reservoir at its base. Both structures are lined by folded layers of large epithelial cells. In a 3rd species. the melon fly, D. cucurbitaeCoquillett, a rectal gland also is present, hut is situated ventro-laterally off of the rectal sac. It forms a distinct chamber connected to the rectal sac but remains separated from the lumen of this structure by bands of longitudinal and circular muscles. Internally, the epithelial lining consists of large epithelial cells greatly folded upon one another.

Document Type: Research Article

Publication date: April 1, 1971

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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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