作物学报2025，Vol.51Issue(5)：1338-1346,9.DOI:10.3724/SP.J.1006.2025.42048
安徽省不同生理小种稻瘟病菌对稻瘟灵的敏感性研究
Study on the sensitivity of various physiological races of Magnaporthe oryzae to isoprothiolane in Anhui province,China
摘要
Abstract
To investigate variations in the sensitivity of different physiological races of Magnaporthe oryzae to isoprothiolane in Anhui Province,173 M.oryzae isolates were collected from 17 regions across the province during 2021-2022.The physiological races of these isolates were identified using seven differential rice hosts from China.The sensitivity of M.oryzae to isoprothiolane,along with potential cross-resistance to other fungicides,was assessed by measuring mycelial growth rates.The results showed that the 173 M.oryzae isolates belonged to five populations:ZA,ZB,ZC,ZG,and ZH.Among these,the ZB population was pre-dominant,with ZB13 identified as the dominant physiological race.The EC50 values of the isolates ranged from 1.68 to 28.83 μg mL-1,and a baseline sensitivity value of 5.54 μg mL-1 was established for isoprothiolane in Anhui province.Among the isolates,102 were classified as sensitive,70 as low-resistant,and 1 as moderately resistant.The resistance levels of the dominant physio-logical races ZB13,ZB15,and ZB16,identified in regions such as Fengtai County and Xuancheng District,were significantly lower than those observed in regions such as Nanling County and Shitai County.This finding suggests that variations in the sensi-tivity of M.oryzae to isoprothiolane in Anhui Province are primarily influenced by geographic location rather than physiological race.Furthermore,no significant correlation was found between sensitivity to isoprothiolane and sensitivity to pyraclostrobin or prochloraz.These results indicate that,under the premise of rational rotation with other fungicides,isoprothiolane can continue to serve as a key fungicide for managing rice blast disease in Anhui province.关键词
安徽省/稻瘟病菌/生理小种/稻瘟灵/抗药性Key words
Anhui province/Magnaporthe oryzae/physiological races/isoprothiolane/resistance引用本文复制引用
沈文杰,陈晴晴,胡逸群,张爱芳,张曼玉..安徽省不同生理小种稻瘟病菌对稻瘟灵的敏感性研究[J].作物学报,2025,51(5):1338-1346,9.基金项目
本研究由2025年农业科研专项-青年基金项目(沈文杰)资助. This study was supported by the 2025 Agricultural Research Special Project-Youth Foundation Program(Shen Wenjie). （沈文杰）
