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福建省玉米小斑病菌对丙环唑、烯唑醇和咪鲜胺的敏感性
引用本文:甘林,代玉立,滕振勇,阮宏椿,杜宜新,石妞妞,陈福如,杨秀娟.福建省玉米小斑病菌对丙环唑、烯唑醇和咪鲜胺的敏感性[J].农药学学报,2016,18(2):194-200.
作者姓名:甘林  代玉立  滕振勇  阮宏椿  杜宜新  石妞妞  陈福如  杨秀娟
作者单位:1.福建省农业科学院 植物保护研究所, 福州 350013
基金项目:福建省属公益类科研院所专项(2014R1024-5);福建省农业科学院博士启动基金(2015BS-4).
摘    要:为明确玉米小斑病菌对丙环唑、烯唑醇和咪鲜胺的敏感性,采用菌丝生长速率法测定了自福建省15个市、县分离的185株玉米小斑病菌对3种药剂的敏感性。结果显示:供试菌株对丙环唑、烯唑醇和咪鲜胺的EC50值分别在0.0186~7.779、0.0416~22.32和0.0053~7.930μg/mL之间。敏感性频率分布图显示,玉米小斑病菌群体中已出现对丙环唑、烯唑醇和咪鲜胺敏感性降低的亚群体。以连续单峰频次分布的大多数菌株群体的EC50平均值(0.5199±0.0284)、(0.4079±0.0204)和(0.3818±0.0202)μg/mL分别作为玉米小斑病菌对丙环唑、烯唑醇和咪鲜胺的相对敏感基线,发现各有15.14%、20.00%和17.30%的菌株对丙环唑、烯唑醇和咪鲜胺产生了抗性,抗性倍数最高分别为14.96、54.71和20.77。玉米小斑病菌对3种杀菌剂之间具有显著的交互抗性,而丙环唑和烯唑醇之间的交互抗性相关系数最高,为0.8662。本研究结果可为田间玉米小斑病防控杀菌剂的合理使用提供理论依据。

关 键 词:玉米小斑病菌    丙环唑    烯唑醇    咪鲜胺    敏感性    交互抗性
收稿时间:2015/10/18 0:00:00

Sensitivity of Bipolaris maydis to propiconazole, diniconazole and prochloraz in Fujian province
GAN Lin,DAI Yuli,TENG Zhenyong,RUAN Hongchun,DU Yixin,SHI Niuniu,CHEN Furu and YANG Xiujuan.Sensitivity of Bipolaris maydis to propiconazole, diniconazole and prochloraz in Fujian province[J].Chinese Journal of Pesticide Science,2016,18(2):194-200.
Authors:GAN Lin  DAI Yuli  TENG Zhenyong  RUAN Hongchun  DU Yixin  SHI Niuniu  CHEN Furu and YANG Xiujuan
Institution:1.Institute of Plant Protection, Fujian Academy of Agricultural Science, Fuzhou 350013, China2.Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou 350003, China3.Fujian Seed Management Station, Fuzhou 350001, China
Abstract:The sensitivities ofBipolaris maydis to propiconazole, diniconazole and prochloraz were determined by measuring the mycelial growth on the fungicide-amended media using 185 isolates collected from 15 counties of Fujian province. The results indicated that 50% effective concentration (EC50) values of all isolates to propiconazole, diniconazole and prochloraz ranged from 0.018 6 to 7.779, 0.041 6 to 22.32 and 0.005 3 to 7.930 μg/mL, respectively. The results of the frequency analysis revealed that low sensitivity subcolony had been discovered in the tested isolates. The mean EC50 values of (0.519 9±0.028 4), (0.407 9±0.020 4) and (0.381 8±0.020 2) μg/mL for most isolates showed a unimodal curve distribution, which was treated as the sensitivity baseline ofB. maydis to propiconazole, diniconazole and prochloraz, respectively. 15.14%, 20.00% and 17.30% of the isolates exhibited resistance to propiconazole, diniconazole and prochloraz, respectively. And the EC50 values of the highest resistant isolates were 14.96, 54.71 and 20.77 folds of the sensitivity baseline, respectively. There was obvious cross resistance among the 3 kinds of fungicides. Especially, the correlation efficient existed between propiconazole and diniconazole is the highest (r=0.866 2). The results provided a theoretical basis for the efficient application of fungicides in the control of corn southern leaf blight in the field.
Keywords:Bipolaris maydis  propiconazole  diniconazole  prochloraz  sensitivity  cross resistance
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