闹羊花素-Ⅲ对斜纹夜蛾和小菜蛾的杀虫活性研究  

STUDIES ON THE BIOACTIVITY OF RHODOJAPONIN-Ⅲ TO THE LARVAE OF SPODOPTERA LITURA AND PLUTELLA XYLOSTELLA

作　　者：程东美[1] 胡美英[2] 张志祥[2] 周利娟[2] 徐伟松[2] 

机构地区：[1]仲恺农业技术学院植保系,广州510225 [2]华南农业大学昆虫毒理研究室,广州510642

出　　处：《天然产物研究与开发》2002年第1期25-28,共4页Natural Product Research and Development

基　　金：国家自然科学基金 ( 39870 440 )

摘　　要：报道了闹羊花素 Ⅲ对斜纹夜蛾和小菜蛾的杀虫活性。结果表明 ,闹羊花素 Ⅲ对斜纹夜蛾 5龄幼虫处理后 2 4h、48h和 72h的拒食中浓度分别为 16 93μg·ml-1、19 31μg·ml-1和 16 96 μg·ml-1,10 0 μg·ml-1浓度的闹羊花素 Ⅲ处理斜纹夜蛾幼虫 ,幼虫的平均发育历期为 2 2 .36d ,存活率为39 72 % ,化蛹率为 33 95 % ,处理后 72h的雌蛹重为 0 .2 96 g/头 ,均明显低于对照。以 5 0 0 μg·ml-1浓度的闹羊花素 Ⅲ处理小菜蛾幼虫 ,1d后的拒食率为 70 43% ,处理后 5d的化蛹率为 16 6 7% ,羽化率为 6 6 6 7% 。Bioassays of rhodojaponin-Ⅲ,for insecticidal effects on the larvae of Spodoptera litura and Plutella xylostella were carried out.The results showed that AFC 50 of rhodojaponin-Ⅲ against the 5th instar larvae of S.litura were 16.93 μg·ml -1,19.31 μg·ml -1 and 16.96 μg·ml -1 24 h,48 h and 72 h after treatment,respectively.Treatment with 100 μg·ml -1,the development perviod of larvae of S.litura were 22.36 d,the mortality was 39.72%,the pupating rate was 33.95%,the weight of the female pupa was 0.296 g/pupa.At concentration of 500 μg·ml -1 of rhodojaponin-Ⅲ,the mortality was 53.33% 4 days after treatment and the pupating rate was only 16.67% against 3-rd instar larvae of Plutella xylostella.

关 键 词：闹羊花素-Ⅲ 斜纹夜蛾 小菜蛾 

分 类 号：R93[医药卫生—生药学]