"The evolution of olfactory communication in bade beetles brought with it the parallel or coevolution of kairomonal systems in the natural enemy complexes. Entomophagous insects developed olfactory receptors and behavioral patterns responsive to insect and host-produced volatiles in the ecosystems of bark beetles. The phenomenon has both positive and negative implications for efforts to employ natural enemies in pest management."
Kulhavy, David and Miller, Mitchel C., "Potential for Biological Control of Dendroctonus and Ips Bark Beetles" (1989). Faculty Publications. 215.