【摘要】 <正>栗山天牛(Massicus raddei)属鞘翅目(Coleoptera)天牛科(Cerambycidae)山天牛属(Massicus)(陈世骧,1959),是近年来在我国东北林区造成严重危害的蛀干害虫,主要危害辽东栎(Quercus liaotungensis)和蒙古栎(Q.mongolica)等天然林树种。自20世纪90年代开始在东北栎树天然林中暴发以来,对我国东北林区的生态环境建设造成了巨大损害。受害树干内天牛坑道密布,轻者生长衰弱,重者风折、死亡(孙永平,2001;侯义等,2000)。更多还原

【Abstract】 A field survey showed that adults of Massicus raddei fed on sap of Quercus mongolica trunk through bitten wounds.The soluble sugar and acid contents of Q.mongolica exudates were determined with the HPLC( high performance liquid chromatography) method,and the volatile substances of the sap were determined by GC-MS( gas-chromatographmass spectrometer).The results indicated that soluble sugar in the sap included sucrose,glucose and fructose,among which the glucose had the highest content of 55.2 mg·g- 1.Acetic acid was the major acidic substance in the exudate without malic acid and citric acid,and its content was 9.8 mg·g- 1.Eleven volatile compounds,including acid,ester,benzene,alcohol,aldehyde,ether and alkane,were detected from Q.mongolica exudates.The 2-amino-6-methylbenzoic acid( 34.31%),acetic acid( 12.11%),formic acid( 6.81%),diethyl phthalate( 5.34%),2,3-butanediol( 3.22%),and 1,2-dichloro-benzene( 2.05%) were the main components of the exudate volatiles.更多还原