【作者】 桂连友； 雷玉平；

【Author】 Gui Lianyou Lei Yuping (Department of Agronomy,Hubei Agricultural college,Jingzhou,434103)

【机构】 湖北农学院农学系；

【摘要】 采用玻片浸渍法和叶片浸渍法测定艾蒿（Artemisia argyi Levl et Vant.）、猪毛蒿（Artemisia scoparia Waldst et Kitag.）、小飞蓬（Conyza canadensis（L.）Crong.）、苍耳（Xanthium sibiricum Patrin.）和水蓼（Polygonum hydropiper L.）5种野生植物的提取物稀释液对朱砂叶螨（Tetranychus cinnabarinus（Boisduval））的生物活性。结果表明:其地上部分乙醇提取物中,艾蒿提取物稀释液对朱砂叶螨有较好的毒杀作用,其余4种效果较差。采用玻片浸渍法测定了艾蒿粗提物对朱砂叶螨的毒力,以水及水与丙酮的混合液做溶剂所得 Lc₅₀分别为2 687mg/l和1 275mg/l。更多还原

【Abstract】 Slide glass immersion and leaf blade immersion have been used to determine the or- ganism activity of the extracts of Artemisia argyi,Artemiaia scoparia,conyza canadensis,Xan- thium sibiricum and polygonum hydropiper to Tetranychus cinnabarinus in the laboratory.The results show that the alcohol extracts of Artrmisia argyi to Tetranychus cinnabarinus have a bet- ter functioning,the rest four,vice versa.The toxicity of Artemisia argyi extract to Tetranychus cinnabarinus by means of slide glass immersion have been tested.The results indicate that the extract with acetone and water as solvent have a better control over that of water as solvent with the Lc₅₀ 1275mg/l and 2687mg/l,respectively.更多还原