中文摘要：

[目的]测定山东省小麦赤霉病菌（Fusarium gramineaanum）对多菌灵的敏感性水平，为生产中合理用药提供参考。【方法】以2．0mgm多菌灵为鉴别剂量，在PDA平板上测定90个菌株的敏感性。用菌落直径法测定菌株的EC50值并计算抗性倍数；用孢子萌发法测定lOmg／L多菌灵对芽管伸长的抑制情况。【结果】90个小麦赤霉菌株的EC50平均值为（0．5269±0．0093）mg／L，没有抗性菌株存在；10mg／L多菌灵对芽管伸长有明显抑制作用并导致芽管畸形。[结论】山东省小麦赤霉病菌均为多菌灵的敏感菌株，多菌灵可用于防治小麦赤霉病。

英文摘要：

[Aims] The study aims to determine sensitivity to carbendazim （MBC） in Fusarium graminearum, and to provide reference for agricultural production in Shandong province. [Methods] A total of 90 isolates of E graminearura were collected from 15 districts in Shandong province to determine the sensitivity to MBC with 2.0 mg/L as the distinctive concentration. The values for 50% effective concentration （EC,0） were identified by measuring mycelial growth in fungicide- amended PDA media and the resistance ratio was counted. The inhibitory effect of 10 mg/L MBC on E graminearum isolates was also investigated by spore germination assay. [Results] These results showed that the mean EC~0 value of 90 isolates was （0.526 9~0.009 3） mg/L, there was no MBC-resistant isolate in Shandong province. Spore germination assay showed that 10 mg/L of MBC significantly affect the elongation of germ tube and resulted in abnormal growth. [Conclusions] All isolates ofE gram/nearum were sensitive to MBC, and MBC could be used in Shandong province.