防治马铃薯晚疫病除了在播种前消灭病薯、选用抗病良种和建立无病良种基地、切块播种、增施有机肥料外,由于病薯不可能淘汰干净,在生长期密切注意病害是否发生,做好预测预报工作,也是防治工作的重要一环。根据各地经验,可在气象条件利于发病时加紧寻找发病中心。如河北沙岭子发病中心出现的时期,通常都在旬平均空气相对湿度为75%的那10天 Prevention and control of potato late blight In addition to the elimination of the disease before sowing, the selection of disease-resistant varieties and the establishment of disease-free seed base, cut sowing, increasing organic fertilizer, the potato can not be eliminated due to close attention in the growing period of disease occurs, Doing a good job of forecasting and forecasting is also an important part of prevention and control work. According to local experiences, we can step up the search for the disease center when the weather conditions are favorable to the onset. Such as the incidence of Shalingzi Hebei Center, usually ten days average relative humidity of 75% of that 10 days