农药学学报2016，Vol.18Issue(2)：194-200,7.DOI:10.16801/j.issn.1008-7303.2016.0025
福建省玉米小斑病菌对丙环唑、烯唑醇和咪鲜胺的敏感性
Sensitivity ofBipolaris maydis to propiconazole, diniconazole and prochloraz in Fujian province
摘要
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.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Key words
Bipolaris maydis/propiconazole/diniconazole/prochloraz/sensitivity/cross resistance分类
农业科技引用本文复制引用
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):194-200,7.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) （2014R1024-5）
