36种植物甲醇提取物杀蚜虫活性的研究

目的]筛选我国西南地区具有杀蚜活性的植物。方法]以萝卜蚜虫作为供试靶标昆虫，采用浸叶法测定蛇足石杉、岩木瓜及珍珠莲等36种植物甲醇提取物对蚜虫的杀虫活性。结果]36种植物甲醇提取物5g／L浓度处理蚜虫12和24h后．岩木瓜、珍珠莲和光叶铁仔3种植物甲醇提取物校正死亡率均大于60％。岩木瓜、珍珠莲和光叶铁仔甲醇提取物对蚜虫24h的LC50值分别为1．26、1．48和2．38g／L，表现出较强的毒力。结论]岩木瓜、珍珠莲和光叶铁仔甲醇提取物的杀虫活性成分值得深入研究，

Study on Insecticidal Activities of 36 Species Plants Methanol Extracts against Brevicoryne brassicae

Objective] The main aim was to screen insecticidal plants in southwest of China.Method] The insecticidal activities of 36 species plants methanol extracts against Brevicoryne brassicae,including Huperzia serrata,Ficus tsiangii,Ficus sarmentosa var.henryi and so on,were assayed.Result]The corrected mortality rates of 3 species plants methanol extracts with 5 g/L concentration against B.brassicae,including F.tsiangii,F.sarmentosa var.henryi,Myrsine stolonifera,were over 60% at 12 h and 24 h after treatment...