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A group of sesquiterpenes, including a major compound α-longipinene and several minor ones α-cubebene, α-ylangene, (−)-α-copaene, α-bergamotene, β-caryophyllene, and α-farnesene, found in genitalia extracts from virgin females elicited male antennal responses.
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We thus hypothesized that female ALBs release volatile pheromone while performing this sex-specific behavior. Female ALBs were observed rhythmically extending the genitalia in a manner reminiscent of female calling behaviors in other cerambycid species. Male-produced pheromone components have been reported in the Asian longhorn beetle, Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae), but field attraction to these components has been less than overwhelming.
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