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J Chem Ecol

Title:		"Identification of volatile compounds used in host location by the black bean aphid, Aphis fabae"
Author(s):		Webster B; Bruce T; Dufour S; Birkemeyer C; Birkett M; Hardie J; Pickett J;
Address:		"Rothamsted Research, Harpenden, Hertfordshire, UK. ben.webster@bbsrc.ac.uk"
Journal Title:		J Chem Ecol
Year:		2008
Volume:		20080627
Issue:		9
Page Number:		1153 - 1161
DOI:		10.1007/s10886-008-9510-7
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"Behavioral and electrophysiological responses of winged Aphis fabae to volatiles of faba bean, Vicia faba (var. Sutton dwarf), plants were studied and semiochemicals used in host location were identified. In olfactometer bioassays, aphids spent significantly more time in the region of the olfactometer where V. faba volatiles from an intact plant were present than in control regions with clean air. This response also occurred when an air entrainment sample of a V. faba plant was used as the odor source. Coupled gas chromatography-electroantennography revealed the presence of 16 electrophysiologically active compounds in the air entrainment sample. Fifteen of these were identified as (Z)-3-hexen-1-ol, 1-hexanol, (E)-2-hexenal, benzaldehyde, 6-methyl-5-hepten-2-one, octanal, (Z)-3-hexen-1-yl acetate, (R)-(-)-linalool, methyl salicylate, decanal, undecanal, (E)-caryophyllene, (E)-beta-farnesene, (S)-(-)-germacrene D, and (E,E,)-4,8,12-trimethyl-1,3,7,11-tridecatetraene. An olfactometer response was observed to a 15-component synthetic blend that comprised all identified compounds at the same concentration and ratio as in the natural sample, with the aphids spending significantly more time in the treated regions of the olfactometer where volatiles were present than in the control regions. These data are discussed in the context of insect host location and crop protection"
Keywords:		"Air Movements Animals Aphids/*physiology *Behavior, Animal/drug effects/physiology Electrophysiology Gas Chromatography-Mass Spectrometry Odorants/*analysis *Vicia faba/chemistry Volatilization;"
Notes:		"MedlineWebster, Ben Bruce, Toby Dufour, Samuel Birkemeyer, Claudia Birkett, Michael Hardie, Jim Pickett, John eng Biotechnology and Biological Sciences Research Council/United Kingdom Research Support, Non-U.S. Gov't 2008/06/28 J Chem Ecol. 2008 Sep; 34(9):1153-61. doi: 10.1007/s10886-008-9510-7. Epub 2008 Jun 27"