Abstract

The effectiveness of two parasitic wasps, Bracon hebetor Say and Venturia canescens (Gravenhorst), in suppressing populations of the almond moth, Cadra cautella (Walker) was tested separately in 44.7 m3 rooms in the presence of large numbers of the red flour beetle, Tribolium castaneum (Herbst). Numbers of B. hebetor were decreased while numbers of the almond moth increased in the presence of T. castaneum. Populations of Venturia canescens were unaffected by T. castaneum.

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