Thermal Death of Oriental Fruit Fly (Diptera: Tephritidae) Third Instars in Developing Quarantine Treatments for Papayas

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Current quarantine treatments to disinfest papayas of fruit flies (Diptera: Tephritidae) are often either detrimental to fruit quality or restricted to fruit less than one-quarter ripe. After phytotoxicity limits were established, thermal death studies were done on third-instar oriental fruit fly, Dacus dorsalis Hendel, in artificially infested papayas. A hot-water immersion and two low-humidity, hot-air treatments were examined. Mature green to half-ripe papayas heated in <60% RH showed no heat injury. To prevent internal lumpiness, fruits required rapid cooling regardless of treatment. No larvae survived when center temperatures of the fruits were >45.6°C. A two-term polynomial expression described the increase in measured fruit center temperatures with heating times at low humidity. Center temperatures of different size fruits reached the same level if heated >4 h.

Document Type: Research Article

Publication date: February 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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