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为了解新型杀菌剂氟酰胺对小麦纹枯病的防治效果，采用菌丝生长速率法测定江苏省不同地区的90个小麦纹枯病菌（R.cerealis）菌株对氟酰胺的敏感性，并测定对氟酰胺敏感性不同的10个菌株对戊唑醇、咯菌腈、氟环唑、烯唑醇、丙环唑、甲基立枯磷、氟酰胺、井冈霉素A、多菌灵、氯啶菌酯和申嗪霉素等不同杀菌剂的敏感性。结果表明，小麦纹枯病菌菌株间对氟酰胺的敏感性差异较小,EC₅₀值在0.211 3～0.669 0 μg·mL^-1之间，平均为0.406 3±0.100 5 μg·mL^-1；氟酰胺对R. cerealis的抑菌效果优于多菌灵、氯啶菌酯和申嗪霉素，与井冈霉素相近；其抑菌效果明显低于三唑类杀菌剂和咯菌腈、甲基立枯磷。EC₅₀值相关性分析结果表明，小麦纹枯病菌对氟酰胺与上述杀菌剂之间不存在交互抗性。

英文摘要:

To investigate the sensitivity of R. cerealis to novel fungicide flutolanil, 90 isolates of R. cerealis collected from different regions in Jiangsu province of China were tested by employing mycelial growth rate method. Using 10 isolates with different sensitivity to flutolanil, sensitivity to tebuconazole, fludioxonil, epoxiconazole, diniconazole, propiconazole, tolclofos-methyl, flutolanil , jingangmycin A , carbendazim, SYP-7017 and shenqinmycin was determined by the same method to investigate whether there existed cross resistance between flutolanil and other fungicides with diverse action mechanisms. The results revealed significant sensitivity difference to flutolanil among tested isolates with EC₅₀ values ranging from 0.211 3 μg·mL^-1 to 0.669 0 μg·mL^-1. The mean EC₅₀ value of flutolanil was 0.406 3±0.100 5 μg·mL^-1. The linear regression showed that there were no positively-correlated cross resistance between flutolanil and other diverse mechanism fungicides, and the correlation coefficient was lower.

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