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Damage of Wheat by Feeding of Some Stored Product Beetles

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Damage to stored wheat caused by larval and adult feeding of the rusty grain beetle, Cryptolestes ferrugineus (Stephens), tl1e lesser grain borer, Rhyzopertha dominica (F.), and the granary weevil, Sitophilus granarius (L.), was determined by feeding individual insects on single wheat kernels at 30±1°C and 70±2% RH. Weight loss of single kernels caused by the feeding activities of each species was measured and related to kernel site damage and frass production. When insects were allowed to develop from egg to pupa, S. granarius caused 60%, R. dominica 17%, and C. ferrugineus 4% weight loss in single kernels weighing a mean 29.5 mg. Weight loss of kernels and frass production caused by the feeding of R. dominica adults were greatest, while S. granarius and C. ferrugineus adults caused smaller losses. C. ferrugineus fed exclusively on wheat germ whereas the other 2 species fed on both germ and endosperm.

Document Type: Research Article

Publication date: February 1, 1976

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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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