【作者】 黄星； 周明国； 张永慧；

【Author】 Huang Xing Zhou Mingguo Zhang Yonghui (College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095.PRC)

【机构】 南京农业大学农业部病虫监测与治理重点开放实验室；

【摘要】 本文采用水稻离体叶段法就稻瘟菌对三环唑的抗药性进行了测定,共监测采自4个省区的稻瘟菌菌株130份,监测结果表明该4个省区的稻瘟菌对三环唑的敏感性基线为0.46021g/mL,通过监测并未发现抗药性菌株。并就最敏感菌株DY2与最不敏感菌株F6在药剂选择压下进行了筛选,经5代测定,并未发现EC₅₀值有显著升高的现象。通过群体抗药性测定,可认为目前田间稻瘟菌并未对三环唑产生抗药性,三环唑在田间可继续安全使用。更多还原

【Abstract】 One hundred and thirty isolates from 4 different provinces had been monitored their sensitivity to tricyclazole fungicide. The result showed that the sensitive base line was 0.35i g/mL and the resistance isolate has not been found. The hypersensitive isolate DY2 with the EC50 0.016i g/mL and the isolate F6 with highest EC50 1.12i g/mL were selected under tricyclazole pressure through five generations. The EC50 has not shift to go upping. On the base of the results, we can predict the tricyclazole can be continuely used in the field.更多还原