« Previous AbstractAssociations between in utero exposure to airborne emissions from oil and gas production and processing facilities and immune system outcomes in neonatal beef calves    Next AbstractIn situ seasonal study of the volatile production of almonds (Prunus dulcis) var. 'Nonpareil' and relationship to navel orangeworm »

J Agric Food Chem

Title:		"In situ volatile collection, analysis, and comparison of three Centaurea species and their relationship to biocontrol with herbivorous insects"
Author(s):		Beck JJ; Smith L; Merrill GB;
Address:		"Plant Mycotoxin Research Unit, Western Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 800 Buchanan Street, Albany, California 94710, USA. jbeck@pw.usda.gov"
Journal Title:		J Agric Food Chem
Year:		2008
Volume:		20080325
Issue:		8
Page Number:		2759 - 2764
DOI:		10.1021/jf073383u
ISSN/ISBN:		0021-8561 (Print) 0021-8561 (Linking)
Abstract:		"Centaurea solstitialis, commonly known as yellow starthistle, is an invasive plant listed as a noxious weed in the western areas of North America and is the target of classical biological control, which involves release of herbivores known to be specific to this plant. These insects often choose their host plant on the basis of the volatile organic compounds (VOCs) emitted. Accordingly, volatile analysis of host plants can provide insight into VOCs that may attract and/or repel the insect. To this end, solid-phase microextraction (SPME) and a customized collection bag were utilized to perform in situ volatile collection on intact and mechanically damaged leaves of Centaurea solstitialis, Centaurea cyanus, and Centaurea cineraria. Volatile identification was performed by GC-MS, and the VOC differences were determined. The plants C. solstitialis and C. cyanus have been reported to attract the weevil, Ceratapion basicorne, a candidate for biological control, whereas C. cineraria does not attract the weevil. Major VOCs unique to C. cineraria include the sesquiterpenes cyclosativene, alpha-ylangene, and trans-alpha-bergamotene. The compound trans-beta-farnesene was unique to C. solstitialis and C. cyanus"
Keywords:		"Animals Centaurea/*metabolism Gas Chromatography-Mass Spectrometry Pest Control, Biological/*methods Pheromones/*metabolism Volatilization Weevils/*physiology;"
Notes:		"MedlineBeck, John J Smith, Lincoln Merrill, Glory B eng Research Support, U.S. Gov't, Non-P.H.S. 2008/03/26 J Agric Food Chem. 2008 Apr 23; 56(8):2759-64. doi: 10.1021/jf073383u. Epub 2008 Mar 25"