Abstract
The use of mixtures of insect pheromones and host constituents to aggregate populations of the western pine beetle, Dendroctonus brevicomis LeConte, can be expected to affect the activities of its predators, Temnochila virescens var. chlorodia (Mannerheim) and Enoclerus lecontei (Wolcott). D. brevicomis responded differentially to the 2 pheromones, with frontalin and exo-brevicomin attracting comparable numbers of males while the female response was nearly 7 times greater to frontalin. Exo-brevicomin attracted large numbers of T. v. chlorodia; frontalin was nearly inactive. Both pheromones were ineffective in attracting E. lecontei. Conifer terpenes, such as alpha- and beta-pinene, myrcene, or camphene, elicited a strong response from this predator, but at tracted only a few T. v. chlorodia.
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