农药学学报2017，Vol.19Issue(1)：25-31,7.DOI:10.16801/j.issn.1008-7303.2017.0004
中国河南省小麦纹枯病菌对井冈霉素及甲基立枯磷的敏感性
Sensitivity of Rhizoctonia cerealis to jinggangmycin and tolclofos-methyl in Henan province in China
摘要
Abstract
The sensitivities of Rhizoctonia cerealis to jinggangmycin and tolclofos-methyl were determined by measuring the mycelial growth on the fungicide-amended media using 98 isolates collected from 15 cities in Henan province. The results indicated that 50% effective concentration (EC50) values of all isolates to jinggangmycin and tolclofos-methyl ranged from 0.023 to 0.852, and 0.035 to 0.512 μg/mL, respectively. The results of the frequency analysis revealed that low sensitivity subcolony to jinggangmycin had been observed in the tested isolates. The mean EC50 values of (0.424 ± 0.081) and (0.124 ± 0.043) μg/mL for 77.6% and 99.0% of all isolates showed a normal distribution, which was treated as the sensitivity baseline of R. cerealis to jinggangmycin and tolclofos-methyl, respectively. The mean EC50 value of jinggangmycin was 3 times higher than that of tolclofos-methyl, which meant that R. cerealis was more sensitive to tolclofos-methyl. The isolates collected from different regions showed different sensitivities. It is noteworthy that the correlation efficient existed between jinggangmycin and tolclofos-methyl was very low, which implied that there was no cross-resistance between those two fungicides. The results provided a theoretical basis for the efficient application of the two fungicides in the control of wheat sharp eyespot in the field of Henan province.关键词
小麦纹枯病菌/井冈霉素/甲基立枯磷/敏感性/敏感基线Key words
Rhizoctonia cerealis/jinggangmycin/tolclofos-methyl/sensitivity/sensitivity baseline分类
农业科技引用本文复制引用
徐建强,平忠良,党威,李恒,何冬梅,朱艳阁..中国河南省小麦纹枯病菌对井冈霉素及甲基立枯磷的敏感性[J].农药学学报,2017,19(1):25-31,7.基金项目
公益性行业 (农业)科研专项 (201303023) （农业）
国家自然科学基金 (31401774) （31401774）
河南科技大学大学生研究训练计划 (2015148). （2015148）
