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J Chem Ecol

Title:		"A chiral sex pheromone system in the pea midge, Contarinia pisi"
Author(s):		Hillbur Y; Bengtsson M; Lofqvist J; Biddle A; Pillon O; Plass E; Francke W; Hallberg E;
Address:		"Department of Crop Science, Swedish University of Agricultural Sciences, Alnarp. ylva.hillbur@vv.slu.se"
Journal Title:		J Chem Ecol
Year:		2001
Volume:		27
Issue:		7
Page Number:		1391 - 1407
DOI:		10.1023/a:1010317310027
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"The sex pheromone of the pea midge consists of 2-acetoxytridecane, (2S,11S)-diacetoxytridecane and (2S,12S)-diacetoxytridecane. The responses of male pea midges to the corresponding stereoisomers of (2S,11S)-diacetoxytridecane and (2S,12S)-diacetoxytridecane were tested in field trapping experiments and by electroantennographic recordings. When added at 20% of the pheromone component to the sex pheromone blend, the (2S,11R)- and (2R,11S)-stereoisomers of (2S,11S)-diacetoxytridecane, were shown to have a strong inhibitory effect on male attraction in the field. At the same dose, (2R,11R)-diacetoxytridecane, (2R,12R)-diacetoxytridecane, and meso-2,12-diacetoxytridecane, did not have a significant effect on male behavior. It was also shown that substitution of either (2S,11S)-diacetoxytridecane or (2S,12S)-diacetoxytridecane with the related stereoisomers reduced trap catches to the level of blank traps. The electroantennographic recordings showed similar dose-response curves for the pheromone components and the stereoisomers shown to have an inhibitory effect. It seems likely that male antennae have receptors for bothpheromone components and for inhibitory stereoisomers. Scanning electron microscopy and transmission electron microscopy of the antennae revealed three types of sensilla involved in chemoreception: sensilla circumfila, sensilla trichodea, and sensilla coeloconica. The sensilla circumfila and trichodea are both innervated by two sensory cells, whereas the sensilla coeloconica are innervated by four to five cells"
Keywords:		"Alkanes/chemistry/*pharmacology Animals Behavior, Animal *Chemotaxis *Diptera Female Male Sex Attractants/chemistry/*pharmacology Stereoisomerism;"
Notes:		"MedlineHillbur, Y Bengtsson, M Lofqvist, J Biddle, A Pillon, O Plass, E Francke, W Hallberg, E eng Research Support, Non-U.S. Gov't 2001/08/16 J Chem Ecol. 2001 Jul; 27(7):1391-407. doi: 10.1023/a:1010317310027"