Flight Activity of Rhyzopertha dominica (Coleoptera: Bostrichidae) in Response to Feeding Damage and Accumulation of Waste

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The effects of insect-damaged wheat (Triticum aestivum L.) kernels, frass, and uric acid on flight initiation by the lesser grain borer, Rhyzopertha dominica (F.), reared in crowded and uncrowded cultures were determined. In all 3 treatments, beetles reared in uncrowded cultures had a significantly lower flight initiation rate than beetles reared in crowded cultures. Beetles reared in crowded cultures and exposed to insect-damaged wheat kernels had a significantly higher flight initiation rate than beetles exposed to whole or mechanically damaged wheat kernels. Although beetles in uncrowded cultures had a low flight response, the number of beetles initiating flight increased with exposure to increased concentrations of frass or uric acid. These results indicate that the high flight initiation rate of R. dominica reared in crowded cultures can be explained partially by greater insect-feeding damage and accumulation of waste in crowded compared with uncrowded cultures.

Document Type: Research Article

Publication date: December 1, 1998

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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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