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中国农学通报

中国农学通报 ›› 2020, Vol. 36 ›› Issue (13): 131-135.doi: 10.11924/j.issn.1000-6850.casb19010112

所属专题： 水稻； 农业生态

• 植物保护·农药 • 上一篇    下一篇

水稻纹枯病菌对己唑醇的敏感性及抗性监测

刘惠芳1, 刘世江2,3, 丁怡2,3, 赵琪君2,3, 李荣玉2,3,4(), 杨帆2   

  1. 1 贵州省茶叶研究所,贵阳 550006
    2 贵州大学作物保护研究所,贵阳 550025
    3 贵州大学农学院,贵阳 550025
    4 贵州省山地农业病虫害重点实验室,贵阳 550025
  • 收稿日期:2019-01-22 修回日期:2019-04-10 出版日期:2020-05-05 发布日期:2020-04-16
  • 通讯作者: 李荣玉
  • 作者简介:刘惠芳,女,1986年出生,河南沈丘人,硕士研究生,研究方向：农产品质量安全。通信地址：550006贵州省贵阳市花溪区金欣社区 贵州省农科院茶叶研究所,Tel：0851-83761735,E-mail：18300865026@163.com。
  • 基金资助:
    国家重点研发计划项目“化学农药协同增效关键技术及产品研发”(2016YFD0200500);国家自然科学基金“天然产物柠檬醛抗稻瘟病菌的分子机制研究”(31701816);贵州省科技支撑计划项目“水稻农药协同增效及减量施用新技术研究与示范”(黔科合支撑[2016]2534号);贵州省科学技术基金计划项目“天然产物柠檬醛对水稻稻瘟病菌的生物活性及其作用机理研究”(黔科合基础[2017]1083);贵州大学引进人才科研项目“柠檬醛对稻瘟病菌几丁质酶基因表达的影响研究”([贵大人基合字(2015)07号])

Rhizoctonia solani to Hexaconazole: Sensitivity and Resistance Monitoring

Liu Huifang1, Liu Shijiang2,3, Ding Yi2,3, Zhao Qijun2,3, Li Rongyu2,3,4(), Yang Fan2   

  1. 1 Institute of Tea Research in Guizhou, Guiyang 550006
    2 Institute of Crop Protection, Guizhou University, Guiyang 550025
    3 College of Agriculture, Guizhou University, Guiyang 550025
    4 Provincial Key Laboratory for Agricultural Pest Management in Mountainous Region, Guiyang 550025
  • Received:2019-01-22 Revised:2019-04-10 Online:2020-05-05 Published:2020-04-16
  • Contact: Rongyu Li

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摘要：

为评估水稻纹枯病菌对己唑醇的抗性风险,采用菌丝生长速率法测定了贵州、湖北、湖南及河南7个稻区分离的101株纹枯病菌菌株对己唑醇的敏感性,建立其敏感性基线。测定结果表明,不同稻区101株水稻纹枯病菌菌株的EC50值介于1.0751~2.9228 mg/L,平均EC50值为1.8081 mg/L,菌株之间的EC50值最大相差2.72倍。供试纹枯病菌群体对己唑醇的敏感性频率近似于正态分布(W=0.980,P=0.157>0.05),因此将其EC50均值作为水稻纹枯病菌对己唑醇的敏感基线;且2016—2018年监测表明,水稻纹枯病菌对己唑醇仍敏感。该研究结果可为田间用药提供参考。

关键词: 水稻纹枯病菌, 己唑醇, 敏感基线, 抗性监测

Abstract:

In order to evaluate the resistance risk of Rhizoctonia solani to hexaconazole the sensitivity of 101 R. solani strains to hexaconazole using mycelium growth rate method, which isolated from 7 rice areas of Guizhou, Hubei, Hunan and Henan Provinces, and the baseline sensitivity of R. solani to this fungicide was also established. The results showed that the EC50 of hexaconazole to R. solani in different rice areas was 1.0751 to 2.9228 mg/L, with a mean of 1.8081 mg/L, and the sensitivity differences strains were 2.72 times. The frequnecy of sensitivity was in approximately normal distribution(W=0.980,P=0.157>0.05), and the mean EC50 values could be used as the baseline sensitivity of R. solani to hexaconazole, and therefore the mean EC50 values was used as the baseline sensitivity of R. solani to hexaconazole, and the resistance monitoring during 2016-2018 of R. solani showed that the R. solani strain was still sensitive to hexaconazole. The results of this study provide references for field medication.

Key words: Rhizoctonia solani, hexaconazole, baseline sensitivity, resistance monitoring

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