文献类型： 外文期刊
第一作者： Chen, Yu
作者： Chen, Yu;Yang, Xue;Zhang, Ai-Fang;Gao, Tong-Chun;Yao, Jian;Chen, Yu;Yang, Xue;Zhang, Ai-Fang;Gao, Tong-Chun;Chen, Yu;Yang, Xue;Zhang, Ai-Fang;Gao, Tong-Chun
作者机构：
期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：1.907； 五年影响因子：2.022 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： Fluxapyroxad,3-(difluoromethyl)-1-methyl-N-(3',4',5'-trifluorobiphenyl-2 -yl) pyrazole-4-carboxamide (C18H12F5N3O, Fig. 1), is a SDHI fungicide, which is a new active ingredient that interferes with succinate ubiquinone reductase in the electron transport chain of fungi. Between 2008 and 2010, a total of 128 isolates of Rhizoctonia solani from Anhui Province of China were characterized for the baseline sensitivity to fluxapyroxad. The isolates collected between 2008 and 2010 all showed similar sensitivity to fluxapyroxad. Baseline sensitivity was distributed as unimodal curves with an average EC50 value of 0.054 +/- 0.014 mu g ml(-1). However, EC50 values of boscalid for inhibition of mycelial growth of R. solani isolates ranged from 1.89 to 2.68 mu g/ml and the average (+/- SE) EC50 value was 2.212 +/- 0.228 mu g/ml, indicating that the R. solani isolates were less sensitive to boscalid than that of fluxapyroxad. Fluxapyroxad exhibited excellent protective and curative activity against rice sheath blight and provided 82.6-94.2 % protective or curative control efficacy. In field trials, control efficacy of fluxapyroxad at 100 g a.i/ha 15 days and 30 day after second application was 83.4-88.0 %, suggesting excellent activity against sheath blight. Control efficacy of boscalid at a dosage of 600 g a.i/ha 15 days and 30 day after second application was about 51.7-57.0 %. There was a significant difference in the efficacy between fluxapyroxad and boscalid or jinggangmycin. These results suggested that fluxapyroxad is a good alternative fungicide to jinggangmycin for the control of rice sheath blight
分类号： S432.1
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