金龟子绿僵菌对褐飞虱若虫的毒力测定  

Pathogenicity of a Metarhzium anisopliae Isolate against the Nymphs of Brown Planthopper

作　　者：刘苏[1] 林华峰[1] 李茂业[1] 李世广[1] 王君[1] 

机构地区：[1]安徽农业大学植物保护学院,合肥230036

出　　处：《农药》2010年第7期527-529,共3页Agrochemicals

基　　金：公益性行业(农业)科研专项(03_200803003_HY08032439)

摘　　要：研究了一株金龟子绿僵菌Metarhizium anisopliae Ma22菌株对褐飞虱若虫的毒力。结果表明:随着真菌孢子浓度的增加,接种后褐飞虱的逐日死亡率上升。用时间-剂量-死亡率模型对生物测定结果进行模拟分析,估计出了绿僵菌对褐飞虱的致死剂量与致死时间。褐飞虱接种真菌后第6天的LC50值为4.04×108个孢子/L;在接种剂量为1×109、1×1010个孢子/L时,LT50值分别为5.38、4.52d。该菌株在褐飞虱的生物防治中具有很大的应用潜力。An isolate of Metarhizium anisopliae(Ma22) were bioassayed for its virulence against nymphs of brown planthopper(BPH) ,Nilaparvata lugens Stl.The results showed that the daily cumulative mortality of BPH nymphs increased with the infect concentration of conidial suspension.The time-dose-mortality model were used to analyze the bioassay data,and half lethal time(LT 50 ) and the half lethal concentration(LC 50 ) for the isolate on BPH nymphs were estimated.The LC 50 of fungus conidia suspension was 4.04×10 8...

关 键 词：金龟子绿僵菌 褐飞虱 毒力 时间-剂量-死亡率模型 

分 类 号：S476.1[农业科学—农业昆虫与害虫防治]