东莨菪内酯的纯度与其杀螨活性的相关性  

The Correlation Research that Scopoletin Purity and Acaricidal Activity

作　　者：秦培元[1] 丁伟[1] 张永强[1] 杨振国[1] 

机构地区：[1]西南大学植物保护学院,重庆400716

出　　处：《农药》2012年第2期144-147,共4页Agrochemicals

基　　金：科技部农业科技成果转化基金(2010GB2F100388);教育部博士点新教师基金(20100182120021)

摘　　要：[目的]以黄花蒿丙酮提取物为载体,采用叶碟浸渍法测定比较不同纯度的东莨菪内酯对朱砂叶螨卵、幼螨和成螨的触杀活性。[结果]不同纯度的东莨菪内酯对朱砂叶螨卵的活性有一定的差异,处理120 h孵化抑制率均低于50%,对幼螨和成螨的活性呈起伏式增加,处理48 h作用效果最佳的含量均表现在73.45%,其LC50值分别为89.63、97.34 mg/L。[结论]东莨菪内酯对朱砂叶螨的生物活性并不是纯度越高越好,在提取物中含有一定的原料杂质反而对药效有一定的增效作用。The acaricidal activity of different purity of scopoletin against different stages of Tetranychus cinnabarinus using leaf dipping method were evaluated in this article.[Results] The results showed that the different scopoletin purity exhibited weak bioactivity against the egg of T.cinnabarinus and the hatch inhibition rates were all less than 50% after 120 h treatment.The contact toxicity of different scopoletin purity against larval mites and adult mites exhibited rolling-rise type tendency,the 73.45% purity of scopoletin were strongest and their median lethal concentrations（LC50） were 89.63 and 97.34 mg/L,respectively after 48 h treatment.[Conclusions] It can be concluded that the acaricidal activity against T.cinnabarinus doesn＇t enhance with the increasing of scopoletin purity and but some synergistic activity comes with some impurity in raw materials.

关 键 词：东莨菪内酯 朱砂叶螨 触杀活性 

分 类 号：S482.3[农业科学—农药学]