茶蚜体表漂洗物对天敌的引诱活性及组分分析

Attractive activity to natural enemies and component analysis of the rinses from tea aphid body surface

行为生测和触角电位反应都证明茶蚜Toxopteraaurantii体表的正己烷或乙醚漂洗物对茶蚜重要天敌中华草蛉Chysopasinica、蚜茧蜂Aphidiussp .和七星瓢虫Coccinellaseptempunctata具有显著的引诱效应 ,正己烷漂洗物的活性稍强。GC、GC MS分析表明正己烷漂洗物中主要组分是苯甲醛、十一烷、 2 ,5 己二酮、 2 ,5 二氢噻吩、芳樟醇、萘、 4 甲基 辛烷、 1,2 苯甲酸 双 (二丁基 邻苯二甲酸甲酯 )、二丁基 邻苯二甲酸甲酯和二十烷 ,其中苯甲醛、 2 ,5 己二酮和芳樟醇含量稍大。乙醚漂洗物中主要组分为反 2 己烯酸、正十七烷、 2 ,6 ,10 ,14 四甲基十五烷、二十烷、四甲基四十烷、二丁基 邻苯二甲酸酯和十九烷 ,前 2种组分含量较大。

With behaviour bioassay and electroantennogram investigation,it is found that both n-hexane and ether rinses from tea aphid body surface showed obvious attractive activity to its important natural enemies Aphidius sp., Chrysopa sinica, and Coccinella septempunctata and the attractive activity of n-hexane rinse was slight stronger. GC and GC-MS analyses showed that the main components in n-hexane rinse were undecane, benzaldehyde, 2,5-hexanedione, 2,5-dihydro-thiophene, linallol, naphthalene, 4-methyl -octane, 1,2-benzenedicarboxylic acid, bis (dibutyl phthalate), dibutyl phthalate and eicosane, in which the amounts of benzaldehyde, 2,5-hexanedione and linalool were a little more than the others. The main components from ether rinse were E-2-hexenoic acid, heptadecane, 2,6,10,14-tetramethyl-pentadecane, eicosane, tetratetracontane, dibutyl phthalate and nonadecane, among which the amounts of E-2-hexenoic acid and heptadecane were much more.