Survival of short-term exposure to high temperatures was determined for the eggs and first through fifth instars of oriental fruit moth, Grapholita molesta (Busck). LT50's and the temperatures and exposure times required for 100% mortality are reported. First instars were most susceptible and fifth instars were least susceptible to high temperatures. Less time was required to reduce survival of younger than older larvae at the same temperature. A 1.0°C increase in temperature resulted in shorter exposure times to reduce survival of any immature stage. Response of wild larvae was similar to that of laboratory-reared individuals. A heat treatment of 45.0°C for 55 min was sufficient to kill all immature stages. About 39 min was required for the interior of a nectarine to reach 45.0°C. Techniques to test insect response to high temperature and use of heat treatments for disinfestation of stone fruits are discussed.
Document Type: Research Article
Publication date: June 1, 1987
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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.