作　　者： ; ; ; ; ;

机构地区： 广东省烟草专卖局

出　　处： 《烟草科技》 2011年第1期74-78,共5页

摘　　要： 采用离体与活体叶脉注射染病法,比较了几种诱导剂对烟草抗青枯病的效果。结果表明,苯并噻二唑(BTH)对烟草诱导抗病具有显著效应,在50μg/mL浓度处理下,离体和活体诱导抗病效率分别为60.96%和52.76%。以100,50,25,12.5,6.25μg/mL BTH浓度处理后5至15 d的测定结果,50μg/mL以上浓度离体和活体的诱导效率均达到50%以上。离体病原菌抑菌活性测定结果显示BTH对病原菌没有抑制活性,而分别以12.5μg/mL BTH和25μg/mL的农用硫酸链霉素混配,离体和活体相对防效分别达到75.31%和73.98%,增效系数在20以上,表现出显著的联合增效作用。 The effects of inducers on the resistence of tobacco plant against tobacco bacterial wilt disease were tested in vitro and in vivo by injecting the suspension of Ralstonia solanacearum into tobacco leaf veins.The results showed that Benzothiadiazole（BTH） was the best among tested inducers with the induced resistance rates of 60.96% and 52.76% in vitro and in vivo,respectively, at the concentration of 50 μg/mL.Of treatments with BTH at the concentrations of 100, 50,25,12.5 and 6.25 μg/mL for 5 to 15 days after injecting,the induced resistance rates in vitro and in vivo were over 50% at the concentration above 50 μg/mL;BTH showed no activity in inhibiting the pathogenic bacteria from growing in in vitro system,however,the mixture of BTH 12.5 μg/mL and agricultural streptomycin sulphate 25 μg/mL showed obviously synergistic activity,the relative control effects reached up to 75.31% and 73.98% in in vitro and in vivo tests,respectively;the synergistic coefficient was over 20.

关 键 词： 烟草青枯病 苯并噻二唑 诱导抗性 增效作用

领　　域： [农业科学] [农业科学]