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《Journal of Northwest Sci-Tech University of Agriculture and Forestry》 2005-08
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Effect of BTH on resistance induction in wheat against Blumeria graminis f.sp.tritici

HUANG Xue-ling,HUANG Li-li,KANG Zhen-sheng,HAN Qing-mei,WEI Guo-rong(College of Plant Protection,Northwest A & F University,Yangling,Shaanxi 712100,China)  
In order to study the ability of benzothiadiazole induced systemic acquired resistance in wheat against Blumeria graminis f.sp.tritici,wheat seedling and adult wheat were inoculated with B.graminis f.sp.tritici after pretreated with BTH.Suppression of the powdery mildew disease was observed in wheat pretreated with BTH.For wheat seedling,the optimum concentration of BTH for resistance induction was found to be at 0.20-0.25 mmol/L,the optimum interval between BTH induction and challenge inoculation was more than 6 days.The optimum treatment for adult wheat was spraying with 0.20 mmol/L BTH twice at tillering,through which the control effect was 60.82%,16% higher than that of the untreated.The results indicated that the BTH-induced resistance against the powdery mildew disease was a response to systemic acquired resistance,and BTH could be used to control powdery mildew in field.
【Fund】: 国家“十五”科技攻关项目(2001BA509B03)
【CateGory Index】: S435.121
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