短期高温预处理与氟虫腈对小菜蛾3龄幼虫的联合作用  

Interaction between short-term heat pretreatment and fipronil on diamondback moth [Plutella xylostella (Linnaeus)]

作　　者：顾晓军[1] 高飞[1,2] 田素芬[1] 

机构地区：[1]福建农林大学应用生态研究所,福州350002 [2]河南农业大学植物保护学院,郑州450002

出　　处：《中国生态农业学报》2009年第4期709-714,共6页Chinese Journal of Eco-Agriculture

基　　金：福建农林大学青年教师基金(B0403);福建省自然科学基金(B0410015);福建省青年科技人才创新项目(2004J010);福建省教育厅项目(2007F5021);福建省高等学校新世纪优秀人才支持计划资助

摘　　要：研究了短期高温预处理与氟虫腈对小菜蛾[Plutella xylostella(Linnaeus)]3龄幼虫的联合作用。结果表明,短期高温对氟虫腈毒力的影响随高温水平及持续时间不同而不同。30℃预处理2h或4h对试虫有一定保护作用,能够降低其后的氟虫腈毒力,但8h对试虫保护作用较弱且不稳定;35℃预处理2h或4h,对试虫保护作用较强,能够降低氟虫腈毒力,但持续时间为8h,则会提高氟虫腈的毒力;40℃预处理2h,对试虫保护作用较弱且不稳定,持续4h便只表现为不利作用。协同毒力指数可应用于Hormesis效应评价。The interaction between short-term heat pretreatment and fipronil on 3rd instar larvae of diamondback moth [Plutella xylostella （Linnaeus）] was investigated. The results indicate that the effect of interaction between short-term heat pretreatment and fipronil on the insects varies with temperature and duration of heat-pretreatment. Heat pretreatment at 30 ℃ for 2 or 4 h can somehow protect insects from fipronil. However, the level of protection is low and unstable as the 30 ℃ pretreatment lasts for 8 h. At 35 ℃, the protection effect is observable in pretreated insects for 2 or 4 h, though 8 h pretreatment improves fipronil toxicity. At 40 ℃, only weak and unstable protection effects are noticeable at 2 h pretreatment duration. Harmful effects develop when the pretreatment is extended to 4 h. Cooperative virulence index （c.f.） may be adopted in Hormesis assessment.

关 键 词：小菜蛾 短期高温 氟虫腈 协同毒力指数Hormesis效应 

分 类 号：S481.1[农业科学—农药学]