Effect of Varying Light and Temperature Cycles on the Ovipositional Response of Malathion-Treated Indian Meal Moth Adults1,2,3

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Light was a primary stimulus in the ovipositional cycle of Plodia interpunctella (Hübner) when the insects were exposed to normal light and temperature phasing. Temperature exhibited a secondary stimulus when it was out of phase with the normal light cycle. Under a normal 14:IO-hour light: dark cycle and temperatures varying from 27 to 32°C with the high occurring at 5 I'M, the peaks of oviposition occurred at 9 I'M. Peaks also occurred at 9 I'M with the same light cycle and re- verse temperature conditions (high temperature at 7 AM). when light and temperature conditions were out of phase, the peaks assumed a bimodal tendency. Constant light conditions caused lessened egg production and accordingly less distinct peaks.

Malathion caused the peak period of oviposition to occur on the 1st day with decreased production on all succeeding days. Egg viability was not affected by any change in light or temperature conditions.

Document Type: Research Article

Publication date: February 1, 1973

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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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