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J Chem Ecol

Title:		"Geometrical and optical isomerism of pheromones in two sympatricDryocoetes species (Coleoptera: Scolytidae), mediates species specificity and response level"
Author(s):		Camacho AD; Pierce HD; Borden JH;
Address:		"Department of Biological Sciences, Centre for Pest Management, Canada"
Journal Title:		J Chem Ecol
Year:		1993
Volume:		19
Issue:		10
Page Number:		2169 - 2182
DOI:		10.1007/BF00979655
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"In a field-trapping experiment, western balsam bark beetles,Dryocoetes confusus Swaine, were highly attracted to a 5ratio1 mixture of (+/-)-exo-and (+/-)-endo-brevicomin. Beetles in the sympatric speciesD. affaber (Mann.), were best attracted to a 1ratio1 blend of these semiochemicals [either (+/-)ratio(+/-) or (+/-)ratio(+/-)], suggesting that both geometrical isomers are pheromone components in these species. In laboratory bioassays and further field experiments, attraction ofD. confusus was greatest when the (+) enantiomers of both geometrical isomers of brevicomin were presented in a 9ratio1 ratio. Responses by maleD. confusus to attractive mixtures were reduced in the presence of (-)-exo-brevicomin. Exploitation of the complete range of variability in pheromone structure (both geometrical and optical isomerism) would allow for optimization and regulation of response levels within a species and also could maintain reproductive isolation among sympatric congeneric species primarily through production and response to species-specific blends"
Keywords:
Notes:		"PubMed-not-MEDLINECamacho, A D Pierce, H D Jr Borden, J H eng 1993/10/01 J Chem Ecol. 1993 Oct; 19(10):2169-82. doi: 10.1007/BF00979655"