马铃薯晚疫病是一种真菌类病害,其危害之重,范围之广。几乎所有马铃薯种植地区都有晚疫病的发生。晚疫病是马铃薯的主要病害之一,每年都有不同程度的发生和流行,其造成的损失严重,在一般年份减产20%左右,流行年份,会造大量成植株提前枯死,如防治措施不当,会造成70-80%的减产,甚至绝产。本文分析了马铃薯晚疫病的发病症状、流行规律,并介绍了防治技术,以供参考。 Phytophthora infestans is a kind of fungal disease, its harm is heavy, the range is wide. Late blight occurs in almost all potato growing areas. Late blight is one of the major diseases of potato. Each year, it occurs and prevails in varying degrees. The losses caused by the late blight are serious. In the general year, about 20% cut is made. In the popular year, a large number of plants will die in advance. If the prevention and control measures are not proper, Will result in 70-80% of the cut, or even abortion. This paper analyzes the incidence of potato late blight symptoms, prevalence, and introduced the control technology for reference.