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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