[Objective]The sensitivity and resistance of wheat stripe rust to triadimefon were studied. [Method]The resistance of 84 stripe rust strains collected from Sichuan and Yunnan was detected by seed - dressing in vitro leave fragment method. [ Result]The strains belonging to susceptible strains accounted for 2.40% ,while resistant strains accounted for 61.90%. The average EC50value of tested strains was 4.07 mg/L; the average resistance level was 21.43 times; the strains with average resistance rate of 10 -50 times accounted for 52.35%. The average resistance level of strains from Yunnan was higher than that of strains from Sichuan. [ Conclusion ] The research provides theoretical basis for the effective control of wheat stripe rust.%[目的]探讨小麦条锈病对粉锈宁杀菌剂的敏感性及抗药性.[方法]采用拌种离体叶段法测定了四川和云南两省的84个条锈菌株对粉锈宁杀菌剂的抗药性.[结果]供试菌株中属于敏感菌株占2.40％,耐药菌株占61.90％；供试菌株的平均EC50值为4.07 mg/L,平均抗性水平为21.43倍,平均抗性频率在10 ～50倍的菌株占52.35％,云南菌株的平均抗性水平高于四川菌株.[结论]为小麦条锈病的有效防治提供了理论依据.
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