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J Agric Food Chem

Title:		Composition of the volatiles from intact and mechanically pierced tea aphid-tea shoot complexes and their attraction to natural enemies of the tea aphid
Author(s):		Han BY; Chen ZM;
Address:		"Institute of Tea, Chinese Academy of Agricultural Sciences, Hangzhou 310008 China. han-insect@263.net"
Journal Title:		J Agric Food Chem
Year:		2002
Volume:		50
Issue:		9
Page Number:		2571 - 2575
DOI:		10.1021/jf010681x
ISSN/ISBN:		0021-8561 (Print) 0021-8561 (Linking)
Abstract:		"The volatile components from intact tea shoots (ITS), obtained by air entrainment, were identified by their mass spectra and retention times and confirmed by comparison with standard samples. They are E-2-hexenal, ocimene, Z-3-hexenyl acetate, Z-3-hexen-1-ol, butanoic acid-3-hexenyl ester, linalool, 1-octanol, geraniol, and indole. Volatiles from mechanically pierced tea shoots (MPTS) were identified as E-2-hexenal, ocimene, Z-3-hexen-1-ol, butanoic acid-3-hexenyl ester, linalool, geraniol, indole, E-2-hexenoic acid, Z-3-hexenyl formate, methyl salicylate, and benzyl alcohol, and volatiles from tea aphid-tea shoot complexes (TATSC) were identified as E-2-hexenal, ocimene, Z-3-hexenyl acetate, Z-3-hexen-1-ol, linalool, geraniol, indole, benzaldehyde, and E-2-hexenoic acid. Z-3-Hexen-1-ol is the main component in the three different types of volatiles, and the amount of benzaldehyde in TATSC volatiles is very ample. The attraction of the volatiles from ITS, MPTS, and TATSC, and the nine components of TATSC volatiles to the natural enemies, the coccinellid, Coccinella septempunctata, the parasite, Aphidius sp., and the lacewing, Chrysopa sinica, were determined by electroantennogram (EAG) and the wind tunnel bioassay. TATSC volatiles and benzaldehyde elicited much larger EAG responses and stronger upwind flight and arresting behavior from each natural enemy in the wind tunnel than other infochemicals"
Keywords:		Animals Aphids/*parasitology Electrophysiology Gas Chromatography-Mass Spectrometry *Odorants Tea/*chemistry/*parasitology Volatilization;
Notes:		"MedlineHan, B Y Chen, Z M eng Research Support, Non-U.S. Gov't 2002/04/18 J Agric Food Chem. 2002 Apr 24; 50(9):2571-5. doi: 10.1021/jf010681x"