Byers, J.A. 1983b. Bark beetle conversion of a plant compound to a sex-specific inhibitor of pheromone attraction. Science 220:624-626.

Abstract-- Both sexes of the bark beetle D. brevicomis convert the (+) and (-) enantiomers of the tree terpene alpha-pinene to the corresponding enantiomers of trans-verbenol at about equal rates. (-)-trans-Verbenol inhibited the response of females, but not of males, to a mixture of attractive pheromone components. Since the female initiates the attack on a pine tree, (-)-trans-verbenol may play a role in reducing intraspecific competition for breeding areas.
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Chemical Ecology