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- Title
Electrophysiological and Behavioral Responses of a Parasitic Wasp to Plant Volatiles Induced by Two Leaf Miner Species.
- Authors
Wei, Jia-Ning; Kang, Le
- Abstract
In the present study, Y-tube olfactometric assays demonstrated that headspace volatile extracts collected from leaf miner–damaged, or artificially damaged, bean plants were more attractive to naive females of the parasitoid insect Opius dissitus than those collected from healthy plants. Headspace extracts from both Liriomyza huidobrensis and Liriomyza sativae second-instar larvae–damaged beans were analyzed by coupled gas chromatography–electroantennographic detection (GC–EAD). Of nine EAD-active volatiles identified, (3E)-4,8-dimethyl-1,3,7-nonatriene, (3Z)-hexenyl acetate, (syn)-2-methylpropanal oxime, and (syn)-2-methylbutanal oxime were the most abundant compounds that evoked significant electroantennogram (EAG) responses. Compounds (3Z)-hexen-1-ol, (anti)-2-methylbutanal oxime, linalool, β-caryophyllene, and (3E,7E)-4,8,12-trimethyl-1,3,7,11-tridecatetraene also elicited clear EAG responses but were present in smaller amounts. Choice experiments in a Y-tube olfactometer indicated that synthetic versions of (3Z)-hexen-1-ol, 2-methylpropanal oxime, 2-methylbutanal oxime, 3-methylbutanal oxime, linalool, (E,E)-α-farnesene, and (3E,7E)-4,8,12-trimethyl-1,3,7,11-tridecatetraene were attractive individually, while (3Z)-hexenyl acetate and (3E)-4,8-dimethyl-1,3,7-nonatriene were unattractive at concentrations similar to those obtained from the headspace collection. Moreover, a blend of nine EAD-active volatiles was significantly more attractive relative to hexane (solvent). A mixture of oximes, tereponids, and green leaf volatiles may facilitate host location by female O. dissitus.
- Subjects
ELECTROPHYSIOLOGY; PARASITIC wasps; PARASITOIDS; NONATRIENE; GAS chromatography
- Publication
Chemical Senses, 2006, Vol 31, Issue 5, p467
- ISSN
0379-864X
- Publication type
Article
- DOI
10.1093/chemse/bjj051