烟草赤星病菌对菌核净和苯醚甲环唑的抗药性检测

Changqing CHEN,Runlin WANG,Yun JIANG,Junke NIU,Dong YAN, Chengqi MIAO,Jie GAO,Xue ZHAO, Xinyue TIAN, Xiaorui ZHANG

Chinese Tobacco Science(2020)

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Abstract
为了解吉林省和黑龙江省烟草赤星病菌对菌核净和苯醚甲环唑的抗性水平,采用菌丝生长速率法,测定了318株烟草赤星病菌对菌核净和苯醚甲环唑的药剂敏感性,建立敏感基线.运用最低抑制浓度法确定抗性菌株及频率,并比较不同采样地点的抗性水平.结果表明,供试敏感菌株对菌核净的敏感性频率分布呈连续的单峰曲线,接近正态分布,其EC50均值2.916μg/mL可作为两省烟草赤星病菌对菌核净的敏感基线,抗性频率为21.38%;烟草赤星病菌对苯醚甲环唑的敏感基线为1.198μg/mL,抗性频率为18.24%.吉林省和黑龙江省烟草赤星病菌对菌核净和苯醚甲环唑产生了不同程度的抗性,不同地点抗性水平存在差异.本研究为烟草赤星病菌的抗药风险评估奠定了基础,为制定吉林和黑龙江两省烟草赤星病科学防治策略和科学用药提供了依据.
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