Tuesday, 28 October 2003

This presentation is part of : Display Presentations, Section Cd. Behavior and Ecology

Pheromone of Galerucella calmariensis: Progress toward chemical identification

Robert J. Bartelt1, Allard A. Cossť1, Bruce W. Zilkowski1, Robert N. Wiedenmann2, and Susan L. Post2. (1) USDA/ARS/NCAUR, Crop Bioprotection Unit, 1815 N. University Street, Peoria, IL, (2) Illinois Natural History Survey, Center for Economic Entomology, 607 E. Peabody, Champaign, IL

Galerucella calmariensis L. (Coleoptera: Chrysomelidae) is an Old World beetle species that has been introduced into the United States as a biocontrol agent of the invasive weed, purple loosestrife (Lythrum salicaria L.). Volatiles were collected from males and females feeding on loosestrife foliage. GC-MS and GC-EAD revealed a male-specific compound that was sensitively detected by the antennae of both sexes. Together, these properties indicate the existence of a male-produced aggregation pheromone in yet another chrysomelid species. High resolution mass spectrometry determined the molecular formula to be C14H20O3. Additional structural information was obtained from spectra and microchemical tests. A synthetic pheromone for this biocontrol agent could become a practical tool for monitoring beetle dispersal, survival, and timing of emergence in the field. It might also be useful for mass collecting of the insects for redistribution to other areas.

Species 1: Coleoptera Chrysomelidae Galerucella calmariensis
Keywords: male-produced aggregation pheromone, electrophysiology

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