none A stored-product insect community including a parasite and a predator was evaluated to determine interactions that might exist and the degree of biological control achieved. The insect community was composed of the Indian meal moth Plodia interpunctella (Hubner); the red flour beetle Tribolium castaneum (Herbst); Bracon hebetor , a parasite; and Xylocoris flavipes , a predator, on a substrate of shelled corn. Bracon hebetor was an ineffective parasite of the Indian meal moth. The red flour beetle was opportunistic and increased its population numbers by feeding on parasitized and dead and moribund Indian meal moths. Because of the strong interaction between the Indian meal moth and the red flour beetle, the interactions of the parasite and predator with the hosts were obscured.