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2,3-Hexanediols as Sex Attractants and a Female-produced Sex Pheromone for Cerambycid Beetles in the Prionine Genus Tragosoma |
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| Authors: | Ann M Ray James D Barbour J Steven McElfresh Jardel A Moreira Ian Swift Ian M Wright Alenka ?uni? Robert F Mitchell Elizabeth E Graham Ronald L Alten Jocelyn G Millar Lawrence M Hanks |
| Affiliation: | 1. Department of Entomology, University of California, Riverside, CA, 92521, USA 6. Department of Biology, Xavier University, Cincinnati, OH, 45207, USA 2. Southwest Idaho Research and Extension Center, University of Idaho, Parma, ID, 83660, USA 3. California State Collection of Arthropods, 3294 Meadowview Rd., Sacramento, CA, 95832, USA 7. Section of Integrative Biology, University of Texas at Austin, Austin, TX, 78712, USA 8. National Institute of Biology, Vecna pot 111, SI-1000, Ljubljana, Slovenia 4. Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA 9. Center for Insect Science, University of Arizona, Tucson, AZ, 85721, USA 10. Juneau Forestry Sciences Lab, USDA Forest Service, Juneau, AK, 99801, USA 5. 6025 Sunstone Blvd., Loma Alta, CA, 91701, USA |
| Abstract: | Recent work suggests that closely related cerambycid species often share pheromone components, or even produce pheromone blends of identical composition. However, little is known of the pheromones of species in the subfamily Prioninae. During field bioassays in California, males of three species in the prionine genus Tragosoma were attracted to 2,3-hexanediols, common components of male-produced aggregation pheromones of beetles in the subfamily Cerambycinae. We report here that the female-produced sex pheromone of Tragosoma depsarium “sp. nov. Laplante” is (2R,3R)-2,3-hexanediol, and provide evidence from field bioassays and electroantennography that the female-produced pheromone of both Tragosoma pilosicorne Casey and T. depsarium “harrisi” LeConte may be (2S,3R)-2,3-hexanediol. Sexual dimorphism in the sculpting of the prothorax suggests that the pheromone glands are located in the prothorax of females. This is the second sex attractant pheromone structure identified from the subfamily Prioninae, and our results provide further evidence of pheromonal parsimony within the Cerambycidae, in this case extending across both subfamily and gender lines. |
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