河南农业科学2011，Vol.40Issue(12)：110-112,3.
3种植物提取物复配对小菜蛾的生物活性
Bioactivity of Mixtures of Three Plant Extracts against Plutella xylostella
摘要
Abstract
In order to control the damage of Plutella xylostella effectively, a new style and high active plant insecticide was studied. The bioactivities of extracts from Sophora flavescens ,Melia toosendan Sieb and Stemona sessilifolia against Plutella xylostella were determined by larva-dropping method. The virulence activity test combined with orthogonal experimental design method was used to study the common-toxicity of the mixture to select the best mixture ratio. The results showed that the extracts from S. Flavescens,M. Toosendan Sieb and S. Sessilifolia had pes-ticidal activity against P. Xylostella,and the LC50 were 74. 07mg/L,58. 64mg/L,86. 97mg/L,respectively. The mixture had the strongest effect on P. Xylostella and its mortality rate reached 98. 8% when the extract of S. Flavescens was mixed with that of M. Toosendan Sieb and S. Sessilifolia in mix-proportion at mass concentration of 6:5:6.关键词
植物提取物/复配/小菜蛾/生物活性/苦参/川楝子/百部Key words
Plants extracts/ Mixtures/ Plutella xylostella / Bioactivity/ Sophora flavescens/Melia toosendan Sieb/ Stemona sessilifolia分类
农业科技引用本文复制引用
卢金清,何冬黎,许家琦,阮小云,王琴,曹儒宾..3种植物提取物复配对小菜蛾的生物活性[J].河南农业科学,2011,40(12):110-112,3.基金项目
湖北省自然科学基金项目(2010ABA241) （2010ABA241）
