中文摘要：

【目的】明确42．4％唑醚·氟酰胺SC在推荐使用剂量下防治马铃薯早疫病的效果，为生产上安全应用提供理论依据。【方法】采用“DMRT”法进行方差分析，并用邓肯氏新复极差法检验差异显著性。【结果】3次施药后10d，42．锄唑醚·氟酰胺SC112．5、150ga．i．／hm^2对马铃薯早疫病防效为86．33％-90．17％；42．4％唑醚·氟酰胺SC75ga．i．／hm^2与300g／L氟唑菌酰胺SC防效相当，高于250g/L醚菌酯EC和50％啶酰菌胺WG的防效。【结论】42．4％唑醚·氟酰胺SC对马铃薯早疫病具有较好的防治效果，建议发病初期施用，推荐使用剂量为112．5-150ga．i．／hm^2。

英文摘要：

[Aims] This study aims to illuminate the effect of fiuxapyroxad-pyraclostrobin 42.4% SC at recommended dosage on potato early blight and to provide the basis for security application in yield. [Methods] The data was analyzed by variance ＂DMRT＂ method and Duncan-style with new multiple ranges to test the significance of differences. [Results] The results showed that 10 days after three times of applying pesticide, the control effects of fluxapyroxad-pyraclostrobin 42.4% SC at 112.5 and 150 g a.i./ha on potato early blight are ranging from 86.33 to 90.17%. The control effect at 75 g a.i./ha is higher than that of pyraclostrobin EC and boscalid 50% WG at 250 g/L, and is equivalent to that of fiuxapyroxad SC at 300 g/L. [Conclusions] The potato early blight disease could be effectively controlled by fluxapyroxad-pyraclostrobin 42.4% SC, especially at initial infection stage treated with the recommended dose of 112.5-150 g a.i./ha in the fields.