东莨菪内酯对朱砂叶螨的驱避和产卵抑制活性  

Repellent and oviposition deterrent properties of scopoletin to Tetranychus cinnabarinus

作　　者：雍小菊[1] 张永强[1] 丁伟[1] 

机构地区：[1]西南大学植物保护学院,重庆400716

出　　处：《应用昆虫学报》2012年第2期422-427,共6页Chinese Journal of Applied Entomology

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：本研究采用叶碟浸渍法测定了东莨菪内酯对朱砂叶螨Tetranychus cinnabarinus(Biosduvals)雌成螨的触杀活性,采用选择性的半叶法测定了驱避活性,同时采用非选择性的全叶法测定了产卵抑制活性。结果表明,东莨菪内酯对朱砂叶螨雌成螨具有较好的触杀活性,采用叶碟浸渍法处理48h后的LC50为0.297mg·mL-1,LC30为0.105mg·mL-1,LC10为0.023mg·mL-1。采用LC50、LC30和LC103个浓度的东莨菪内酯处理雌成螨后,发现东莨菪内酯对雌成螨没有表现出明显的驱避活性,处理区和对照区24h和48h的着螨率均为50%左右;采用LC50和LC102个浓度处理雌成螨后表现出了一定的产卵抑制活性,平均产卵抑制率分别为23.02%和13.23%,而LC30对雌成螨的产卵量表现出了促进作用,平均产卵抑制率为-8.25%,这可能是由于毒物兴奋效应所致。本研究旨在为东莨菪内酯的进一步开发和应用奠定理论基础。The leaf disc bioassay method was used to study acaricidal activity of scopoletin,and choice and non-choice experiments to evaluate the repellent and oviposition inhibition properties of this compound against adult female Tetranychus cinnabarinus （Boisduvals） （Acari：Tetranychidae）.The results indicate that the median lethal concentration （LC50） and sublethal concentrations （LC30 and LC10） at 48 h were 0.297、0.105 and 0.023 mg · mL-1,respectively.At LC50、LC30 and LC10,scopoletin had no obvious repellent activity against adult female T.cinnabarinus;the ratio of mites in the treatment and control was about 50%.However,at LC50 and LC10 scopoletin had a deterrent effect on oviposition;average oviposition inhibition rates were 23.02% and 13.23%.Interestingly,at LC30 the rate of oviposition inhibition was-8.25%,suggesting stimulation of oviposition which may be caused by acaricide hormesis.

关 键 词：东莨菪内酯 朱砂叶螨 驱避 产卵抑制 

分 类 号：S433[农业科学—农业昆虫与害虫防治]