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Suppression of the stored-product insect Tribolium confusum by Xylocoris flavipes and Amphibolus venator

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Abstract: 

We evaluated the suppression of the confused flour beetle, Tribolium confusum, by the anthocorid bug Xylocoris flavipes and the reduviid bug Amphibolus venator. Four treatments were tested: X. flavipes adults, A. venator adults, X. flavipes adults and A. venator adults released, and control (no predators). After 25 days, X. flavipes alone showed 96.9% suppression of T. confusum, A. venator alone showed 76.2% suppression and both the predatory bugs together showed 95.6% suppression. The rates of loss of whole-wheat flour as an index of damage caused by T. confusum were 2.7%, 6.4%, 3.6% and 11.7% in X. flavipes adults, A. venator adults, X. flavipes adults and A. venator adults released, and control respectively. Furthermore, A. venator attacked X. flavipes adults but not X. flavipes nymphs. The possibility of using both X. flavipes and A. venator against T. confusum is discussed.
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Keywords: Amphibolus venator; Tribolium confusum; Xylocoris flavipes; biological control; stored-product insect

Document Type: Research Article

Affiliations: Food Entomology Laboratory, National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan

Publication date: 2007-09-01

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