【摘要】 采用浸提法,用95%的乙醇为溶剂,提取得到竹柏、小花八角、单瓣狗牙花、灯台树、辣蓼等5种植物材料的提取物。将植物提取物稀释成1、5、10倍3个不同的浓度梯度,用微量点滴法在室内对绣线菊蚜进行触杀作用的测定。结果表明:触杀效果由高至低为:辣蓼>竹柏>灯台树>单瓣狗牙花>小花八角。更多还原

【Abstract】 Using 95% alcohol,the plant extracts of Podocarpus nagi,Lllicium micranthum,Ervatamia divaricata,Cornus controversa and Polygonum hydropiper were extracted.Every kind of extracts was diluted to three concentrations:1,5,and 10 times.The bioassays of contact toxicity were tested by micro-drip on Aphis citricola in laboratory.The contact toxicity of the 5 kinds of plant extracts on A.citricola were Polygonum hydropiper>Podocarpus nagi>Cornus controversa>Ervatamia divaricata>Lllicium micranthum.更多还原