辽宁省黄瓜靶斑病菌对苯醚甲环唑和戊唑醇的敏感性

Sensitivity of Corynespora cassiicola to difenoconazole and tebuconazole in Liaoning Province

摘要: 采用菌丝生长速率法，测定了2013年采集分离自辽宁省8个地区的101株黄瓜靶斑病病原菌群体对三唑类杀菌剂苯醚甲环唑和戊唑醇的敏感性。结果表明：苯醚甲环唑对101株黄瓜靶斑病菌的EC50值范围为1.062~18.918 μg/mL，相差16.814倍，平均EC50值为（7.109±4.578） μg/mL；戊唑醇对上述菌株的EC50值范围为1.624~21.708 μg/mL，相差12.367倍，平均EC50值为（9.398±4.944） μg/mL。田间尚未出现对2种杀菌剂产生抗药性的菌株。不同地区间黄瓜靶斑病菌对苯醚甲环唑和戊唑醇的敏感性无显著差异。

Abstract: 101 strains of Corynespora cassiicola Wei were isolated from 8 areas in Liaoning Province, and their sensitivity to difenoconazole and tebuconazole were examined by mycelium growth rate method in vitro. The results showed the EC50 values of difenoconazole to the 101 strains ranged from 1.062-18.918 μg/mL, with a difference of more than 16.814 times, the average EC50 value was (7.109±4.578) μg/mL. Mean while the EC50 values of tebuconazole ranged from 1.624-21.708 μg/mL, with a difference of more than 12.367 times, the auerage EC50 value was (9.398±4.944) μg/mL. No resistant strain was detected in the field. The sensitivity of C.cassiicola from different areas to difenoconazole and tebuconazole showed no significant difference.