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J Chem Ecol

Title:		Synthetic grape volatiles attract mated Lobesia botrana females in laboratory and field bioassays
Author(s):		Anfora G; Tasin M; De Cristofaro A; Ioriatti C; Lucchi A;
Address:		"IASMA-FEM Research and Innovation Centre, San Michele a/A, TN, Italy. gianfranco.anfora@iasma.it"
Journal Title:		J Chem Ecol
Year:		2009
Volume:		20090925
Issue:		9
Page Number:		1054 - 1062
DOI:		10.1007/s10886-009-9686-5
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"In laboratory experiments, we identified and quantified volatiles emitted by inflorescences and berries of two grape varieties (Trebbiano and Sangiovese) and examined the effects of the volatiles on oviposition by the grapevine moth Lobesia botrana. Compared to Trebbiano, Sangiovese is relatively more susceptible to L. botrana infestations under natural conditions. Chemical and electrophysiological analysis indicated only quantitative differences between the volatiles released by the two varieties. In a dual-choice oviposition bioassay based only on volatile cues, females did not show any preference between the two varieties. The six major components of the odor profiles that were GC-EAD-active to female antennae included: limonene, 4,8-dimethyl-1,(E)-3,7-nonatriene, (+/-)-linalool, (E)-caryophyllene, (E,E)-alpha-farnesene, and methyl salicylate. At the beginning of the berry touch phenological stage, their proportions were about 10:0.6:0.4:0.5:0.9:0.6 in Trebbiano and 10:1:0.4:1.5:0.4:0.3 in Sangiovese. A six-component synthetic lure (with the proportion 10:1:1:1:1:1, which approximated the ratio of components released by both varieties) was used in further laboratory oviposition bioassays. Depending on its dosage, the synthetic lure either attracted or repelled oviposition. L. botrana females laid significantly more eggs in the presence of either the grape bunches or the synthetic lure at the attractive dosage. In a release-capture experiment conducted in a field cage that covered two grapevine rows, the synthetic lure was more attractive than a grape cluster or a blank control, and it stimulated oviposition on the vegetation near the lure. The results indicate that L. botrana uses olfactory cues to select oviposition sites and that an artificial lure, containing the major volatiles released by two grape varieties, may be useful in monitoring female activity in the field"
Keywords:		"Acyclic Monoterpenes Animals Behavior, Animal Biological Assay Cyclohexenes/chemistry Female Larva/physiology Limonene Monoterpenes/chemistry Moths/*physiology Odorants Oviposition/drug effects/physiology Polycyclic Sesquiterpenes Sesquiterpenes/chemistry;"
Notes:		"MedlineAnfora, Gianfranco Tasin, Marco De Cristofaro, Antonio Ioriatti, Claudio Lucchi, Andrea eng Research Support, Non-U.S. Gov't 2009/09/26 J Chem Ecol. 2009 Sep; 35(9):1054-62. doi: 10.1007/s10886-009-9686-5. Epub 2009 Sep 25"