The effects of three fungicide combinations on the control of the susceptible potato cultivars / varieties Favorite were investigated , including Metalaxyl-Mmancozeb(68% WG ) , Antracol propineb (70% WP ) and Oxadixyl mancozeb (64% WP) .Our results showed that the controlling effect of the combination of two or three fungicides is better than a single one . After the alternative application of Metalaxyl-Mmancozeb(68% WG) and Antracol propineb (70% WP) ,Antracol propineb (70% WP) and Oxadixyl mancozeb (64% WP) ,Metalaxyl-Mmancozeb(68% WG) and Oxadixyl mancozeb (64% WP) for four times ,the control effects were reached 65.96% , 61.70% and 60.34% and the yields were increased by 61.74% ,60.07% and 52.01% respectively . Our results suggest that alternately application of fungicids will be benefit for the control of late blight .%以马铃薯晚疫病感病品种费乌瑞它为试验对象，采用68％精甲霜锰锌可湿粉剂、70％安泰生丙森锌可湿粉剂和64％恶霜锰锌可湿粉剂3种药剂进行马铃薯晚疫病的防治试验，结果表明：交替使用其中2种或3种药剂防治马铃薯晚疫病的效果优于单一使用1种药剂；68％精甲霜锰锌可湿粉剂与70％安泰生丙森锌可湿粉剂、70％安泰生丙森锌可湿粉剂与64％恶霜锰锌可湿粉剂、68％精甲霜锰锌可湿粉剂与64％恶霜锰锌可湿粉剂3种组合交替施用共喷药4次，防效分别为65.96％、61.70％、60.34％，商品薯产量比对照分别增产为61.74％和60.07％和52.01％。生产上可选用药剂交替使用来防治马铃薯晚疫病。
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