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当前位置: 首页 > 文章 > 唐古特瑞香对斜纹夜蛾的拒食活性研究 华南农业大学学报 2000,21 (1) 44-46
Position: Home > Articles > Studies on Antifeeding Activity of Daphne tangutica Against Tobacco Cutworm , Spodoptera litura Journal of South China Agricultural University 2000,21 (1) 44-46

唐古特瑞香对斜纹夜蛾的拒食活性研究

作  者：
陈立;徐汉虹;赵善欢
单  位：
华南农业大学昆虫毒理研究室
关键词：
唐古特瑞香;斜纹夜蛾;拒食活性
摘  要：
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．
译  名：
Studies on Antifeeding Activity of Daphne tangutica Against Tobacco Cutworm , Spodoptera litura
作  者：
CHEN Li, XU Han-hong, ZHAO Shan-huan (Lab. of Insect Toxicology, South China Agric. Univ., Guangzhou, 510642, China)
关键词：
Daphne tangutica; Spodoptera litura; antifeeding activity
摘  要：
Insecticidal activity of Daphne tanutica, a local endemic plant from Qinghai-Tibet plateau, was first reported in this paper. The air-dried and powdered plant was extracted with methanol, acetone, ethyl acetate, chloroform, benzene and petroleum ester, and the results showed that foe extractive rate in methanol was the largest (22. 34% ), and the smallest (2. 21% ) in petroleum ester. The crude extracts of former five solvents were proved to possess strongly antifeeding effect on the 3rd instar larvae of tobacco cutworm, Spodoptera litura, through the preliminary bioassay with AFC50s of 108. 72, 111. 69, 102. 14, 71. 15 and 65. 51 g dried powder/L. At concentration of 500 g dried powder/L, antifeedant effect of the petroleum ester extract against the tested insects was 62. 31 %. Therefore benzene was the most effective extracting solvent.

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