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Survival of Oriental Fruit Fly and Melon Fly (Diptera: Tephritidae) Eggs Obi posited in Morphologically Defective Blossom End of Papaya Following Two-Stage Hot-Water Immersion Treatment

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A survey was conducted to determine the survival rate (to adult stage) of eggs of oriental fruit lly (Dacus dorsalis Hendel) and melon lly (Dacus cucurbttae Coquillet) that were Obi posited in pinhole and navel blossom ends of defective papaya fruits and that survived the two-stage hot-water immersion (double-dip) quarantine treatment. Only eggs Obi posited in defective blossom end with holes extending all the way to the seed cavity reached the adult stage after the double-dip quarantine treatment. All eggs that were laid in incomplete holes and that survived the double-dip treatment died before becoming adults. I discuss several hypotheses that may explain the mechanism by which eggs oviposited in defective blossom ends were able to escape the lethal effect of the double-dip treatment. Relevance of these results to quarantine security provided by double-dip treatment and other treatments using heat (lethal high temperature) are discussed.

Document Type: Research Article

Publication date: December 1, 1990

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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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