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报道了青藏高原特有植物唐古特瑞香(Daphne tangutica)的杀虫作用。利用甲醇、丙酮、乙酸乙酯、氯仿、苯、石油醚6种极性不同的溶剂对唐古特瑞香进行了连续抽提,其中甲醇提取率最大,为22.3%,石油醚的提取率最低为2.21%.唐古特瑞香的甲醇、丙酮、乙酸乙酯、氯仿、苯抽提物对斜纹夜蛾3龄幼虫的 AFC_(50)值分别为以干粉计108. 72、111.69、102.14、71.75、65.51 g/L,石油醚抽提物在以干粉计 500 g/L的浓度下,拒食率仅为 62.31%.苯为拒食活性成分的最有效提取溶剂.
The insecticidal effect of Daphne tangutica, a endemic plant on the Qinghai-Tibet Plateau, was reported. The methanol, acetone, ethyl acetate, chloroform, benzene, petroleum ether six kinds of different polar solvents Tanggutuixiang continuous extraction, of which the largest methanol extraction rate of 22.3%, the lowest extraction rate of petroleum ether 2.21%. The AFC 50 values for the third instar larvae of S. litura were methanol, acetone, ethyl acetate, chloroform and benzene extracts of T. guttutum respectively as 108. 72,111.69,102.14,71.75,65.51 g / L, petroleum ether extract at a dry weight of 500 g / L, the anti-eating rate was only 62.31%. Benzene is the most effective anti-feeding active ingredient extraction solvent.