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J Chem Ecol

Title:		"(Z,Z)-6,9-heneicosadien-11-one, labile sex pheromone of the whitemarked tussock moth, Orgyia leucostigma"
Author(s):		Grant GG; Slessor KN; Liu W; Abou-Zaid MM;
Address:		"Canadian Forest Service, Natural Resources Canada, 1219 Queen St. E., Sault Ste. Marie, Ontario, Canada P6A 2E5. ggrant@nrcan.gc.ca"
Journal Title:		J Chem Ecol
Year:		2003
Volume:		29
Issue:		3
Page Number:		589 - 601
DOI:		10.1023/a:1022802821338
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"The whitemarked tussock moth (WMTM), Orgyia leucostigma (J. E. Smith), is a major pest of coniferous and deciduous trees in eastern Canada. Chemical identification of its sex pheromone depended primarily on GC-EAD and HPLC analysis, with confirmation of behavioral activity by wind tunnel and field tests. We identified (Z,Z)-6,9-heneicosadien-11-one (Z,Z-6,9-ket) at 4-5 ng/female as the only essential sex pheromone component. Also detected in female extracts were (Z)-6-heneicosen-11-one (Z6-ket) at 2.5 ng/female, (Z,E)-6,8-heneicosadien-11-one (Z,E-6.8-ket) at about 0.5 ng/female, and a trace amount of (Z,E)-6,9-heneicosadien-11-one. Traps containing as little as 1 microg of Z,Z-6,9-ket attracted males at low population levels, indicating it is a potent sex attractant. Traps baited with Z6-ket attracted few males, and in windtunnel bioassays it was at least 100-fold less attractive to males than Z,Z-6,9-ket. No improvement in trap catch occurred with the addition of Z6-ket in various binary mixtures with Z,Z-6,9-ket, including the female ratio, and a ternary mixture of Z,Z-6.9-ket, Z6-ket, and Z,E-6,8-ket in the 9:5:1 ratio detected in females was no better than Z,Z-6,9-ket alone. We attribute the presence of Z,E-6,8-ket and Z,E-6,9-ket in female extracts to the spontaneous and rapid stereospecific isomerization of Z,Z-6,9-ket at room temperature. Male flight began at sunset but peaked during the second half of the night"
Keywords:		"Animals Chromatography, Gas Chromatography, High Pressure Liquid Fatty Alcohols/chemistry Female Male Moths/*physiology Sex Attractants/chemistry/*physiology Sexual Behavior, Animal/*physiology;"
Notes:		"MedlineGrant, Gary G Slessor, Keith N Liu, Wei Abou-Zaid, Mamdouh M eng 2003/05/22 J Chem Ecol. 2003 Mar; 29(3):589-601. doi: 10.1023/a:1022802821338"