期刊
JOURNAL OF CHEMICAL ECOLOGY
卷 32, 期 3, 页码 693-712出版社
SPRINGER
DOI: 10.1007/s10886-005-9026-3
关键词
Galerucella calmariensis; Galerucella pusilla; Coleoptera; Chrysomelidae; purple loosestrife; Lythrum salicaria; biological control; lactone; synthesis; attraction; aggregation pheromone
Male Galerucella calmariensis and Galerucella pusilla (Coleoptera: Chrysomelidae) emit an aggregation pheromone while feeding on host foliage. Isolation of the compound from collected volatiles was guided by comparisons of gas chromatograms of extracts from males and females and by gas chromatography-electroantennographic detection. The compound was identified by a combination of spectrometric methods and microchemical tests as the novel dimethylfuran lactone, 12,13-dimethyl-5,14-dioxabicyclo[9.2.1]tetradeca-1(13),11-dien-4-one. The structure was confirmed by synthesis, and the synthetic compound attracted males and females of both species in field bioassays. These beetles were previously introduced into North America as biological control agents for the invasive wetland weed, purple loosestrife Lythrum salicaria, and the pheromone could become a tool for monitoring populations. A new method is described for distinguishing the two species based on the tibial spurs of the males.
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