Threshold Temperature and Degree-day Estimates for Development of Immature Southern Pine Coneworms (Lepidoptera: Pyralidae) at Constant and Fluctuating Temperatures

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First- and fourth-instar Dioryctria amatella (Hulst) were reared on an artificial diet at six constant temperatures in the laboratory and outdoors. Threshold temperature for larval development was 13, and development from newly hatched larva to pupa and larva to adult required 303 and 493 degree-days (DD), respectively. Mean DD for development of immatures in a shaded area outdoors during spring and early summer of 1984 varied only 8 DD from estimates derived from constant-temperature data. Threshold temperature did not vary with larval age.

Document Type: Research Article

Publication date: February 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.
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