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Survival of Colorado Potato Beetle (Coleoptera: Chrysomelidae) After Exposure to Subzero Thermal Shocks During Diapause

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Adult Colorado potato beetles, Leptinotarsa decemlineata (Say), collected from the field in fall, were exposed to a 179-d period of controlled environmental conditions to simulate the diapause period. Following attainment of a constant temperature period (1°C), groups of beetles were subjected to cold shocks of -4, -6, -8, -10, and - 12°Clasting 4, 6, 8, 10, and 12 h, respectively. Water was added to create differential soil moistures before cold shock was applied. Beetle survival was determined immediately following cold shock and at the conclusion of the simulated diapause. Adramatic reduction in survival occurred following cold shocks of <-4°C, when survival was measured at the end of diapause. Mortality at -6 and -8°C was not expressed immediately after the cold shock. A small difference in soil moisture did not affect survival.

Document Type: Research Article

Publication date: October 1, 1992

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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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