飞机草乙醇提取物对褐稻虱种群的干扰作用  

Interference effects of alcohol extracts of Eupatorium odoratum on the population of brown planthopper,Nilaparvata lugens Stl

作　　者：钟平生[1] 梁广文[1] 曾玲[1] 

机构地区：[1]华南农业大学昆虫生态研究室

出　　处：《植物保护》2008年第3期61-64,共4页Plant Protection

基　　金：国家重点基础发展规划“973”项目(2006CB102006);国家农业结构调整重大技术研究专项(2002-01-05A)

摘　　要：应用扩展的均匀设计与干扰作用控制指数，评价了飞机草乙醇提取物使用浓度、次数对褐稻虱种群的干扰作用。结果表明，飞机草乙醇提取物对褐稻虱成虫具有较强的产卵驱避作用，干扰作用控制指数为0．549-0．600；对褐稻虱各龄幼虫具有一定的毒杀效果，同时建立了干扰作用与使用次数、使用浓度之间的回归模型：Y=0．2527—0．046 1X1-0．023 0X2。使用浓度与次数的不同组合，大多可将褐稻虱种群趋势指数Ⅰ降至1．00以下，使用浓度对防治褐稻虱的干扰作用大于使用次数。With extended uniform design and IIPC（the interference index of population control）, the interference effects of alcohol extracts of Eupatoriurn odoraturn at different concentrations and application frequencies on the population of brown planthopper （BPH） were studied in paddy fields. The results showed that the extracts of Eupatoriurn odoraturn had a significant interference effect on BPH. The IIPC of ovipositional repellence was between 0. 549- 0. 600. Most of the combinations of different concentrations and frequencies of these extracts had toxic effects on the nymphs to some extent. Meanwhile, the regression model of interference effects was built： Y=0. 252 7-0. 046 1X1 -0. 023 0X2. Most combinations could reduce Ⅰ （index of population trend） value of BPH below 1.00. The effect of concentration on BPH was more significant than that of frequency.

关 键 词：飞机草乙醇提取物 褐稻虱 干扰作用 

分 类 号：S482.38[农业科学—农药学]