黄杜鹃提取物对小菜蛾的产卵忌避和杀卵作用  

Studies on Extracts of Rhododendron molle as Oviposition Deterrentants and Ovicides against Plutella xylostella L.(Lepidoptera: Plutellidae)

作　　者：钟国华[1] 胡美英[1] 章玉苹[1] 周晓梅[1] 

机构地区：[1]华南农业大学昆虫毒理研究室,广东广州510642

出　　处：《华南农业大学学报》2000年第3期40-43,共4页Journal of South China Agricultural University

基　　金：广东省自然科学基金资助项目! (970 0 2 6 )

摘　　要：报道了闹羊花素 III(简称R III)和黄杜鹃花乙酸乙酯 (EtOAc)萃取物等对小菜蛾 (PlutellaxylostellaL .)的产卵忌避和杀卵作用 .在非选择性和选择性试验处理后 72h ,R III(ρ =0 5g·L-1)的产卵忌避率分别为 77 5 4%和80 1 3% ,EtOAc萃取物 (ρ =5g·L-1)的忌避率分别为 5 5 86 %和 6 6 0 1 % .经R III和EtOAc萃取物处理后 ,叶背与叶面卵数之比显著变小 ,卵孵化率明显降低 以 ρ =0 1g·L-1R III处理后 5d ,杀卵率可达 6 6 % .The activities of Rhodojaponin III (Abbr. R III), ethyl acetate (EtOAc) extract and other extracts from flowers of Rhododendron molle G. Don were investagated as oviposition deterrentants and ovicide against diamond back moth, Plutella xylostella L. (Lepidoptera: Plutellidae). 72 h after treatment with ρ =0.5 g·L -1 R III in no choice tests and choice tests, the deterrent rates were 77.54% and 80.13%, those with ρ =5 g·L -1 EtOAc extract were 55.86% and 66.01%, respectively. Furthermore, treatment with R III and EtOAc extract could significantly change the ratio between the numbers of eggs on leaves surface and on leaves back, and could effectively reduce the percentage of eggs incubation, ovicidal rate with ρ =0.1 g·L -1 R III could reach 66%. These results suggest that the use of extracts of R. molle as insect pest behavior reglutor in integrate pest management deserve consideration.

关 键 词：黄杜鹃 闹羊花素-Ⅲ 小菜蛾 产卵忌避 杀卵作用 

分 类 号：TQ453.301[化学工程—农药化工] S482.39[农业科学—农药学]