Changes in the emission of volatile compounds from Hippophae rhamnoides ssp. sinensis induced by Holcocerus hippophaecolus (Lepidoptera:Cossidae)

The study explores changes in variety and content of volatile compounds in Hippophae rhamnoides ssp. sinensis damaged by Holcocerus hippophaecolus. Volatiles of healthy and artificially infested plants leaves were collected during 0–51 hours using continuous dynamic headspace-collection and analysed by using Automated Thermal Desorption-Gas Chromatography-Mass Spectrometry. Thirty-one compounds were identified, including seven alcohols, four esters, two terpenes, six aldehydes, five alkanes, two olefins, three ketones and two benzodiazepines. Compounds of (Z)-3-Hexenyl-3-methylbutanoateand 2-ethylhexyl acetate were herbivore-induced compounds. Olefins, ketones, benzodiazepines, terpenes and alkanes increased shortly after insect feeding. Aldehydes, alcohols and esters decreased in generally. Release regularity and function of compounds respectively discussed followed, especially including 2-ethylhexanol, alpha-terpineol, phytol, methyl salicylate, (Z)-3-Hexenyl-3-methylbutanoate, 2-ethylhexyl acetate, longifolene, 1,3,6-octatriene, 3,7-dimethyl-, hexanal, (Z)-3-hexen-1-ol acetate, with the purpose to approve basic date for disaster mechanisms of H. hippophaecolus.