| Title: | "Homofarnesals: female sex attractant pheromone components of the southern cowpea weevil, Callosobruchus chinensis" |
| Author(s): | Shimomura K; Nojima S; Yajima S; Ohsawa K; |
| Address: | "Department of Biosciences, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan. k3shimom@nodai.ac.jp" |
| DOI: | 10.1007/s10886-008-9451-1 |
| ISSN/ISBN: | 0098-0331 (Print) 0098-0331 (Linking) |
| Abstract: | "The southern cowpea weevil, Callosobruchus chinensis (Coleoptera: Bruchidae), is a major pest of stored legumes in warm temperate and tropical climates. The female sex attractant pheromone was extracted from filter-paper shelters taken from containers that housed virgin females. The extracts were purified by various chromatographic techniques, and the biologically active components in the fractions were screened by gas chromatographic-electroantennographic detection analysis with male antennae. Two compounds that elicited electrophysiological responses were isolated, and gas chromatography-mass spectrometry, nuclear magnetic resonance, and micro-chemical analyses suggested that the active compounds were homofarnesals, (2Z,6E)- and (2E,6E)-7-ethyl-3,11-dimethyl-2,6,10-dodecatrienals. Males of C. chinensis were significantly attracted to filter paper discs loaded with the synthetic compounds at 0.01-0.1 ng compared to solvent control in a Y-tube olfactometer assay. These pheromone components represent unique chemical structures within the genus Callosobruchus" |
| Keywords: | "Animals Chromatography, Gas Chromatography, High Pressure Liquid Farnesol/*analogs & derivatives/metabolism Female Humans Male Sex Attractants/*physiology Weevils/*physiology;" |
| Notes: | "MedlineShimomura, Kenji Nojima, Satoshi Yajima, Shunsuke Ohsawa, Kanju eng 2008/03/21 J Chem Ecol. 2008 Apr; 34(4):467-77. doi: 10.1007/s10886-008-9451-1. Epub 2008 Mar 20" |
