红薯根腐病是我省七十年代以来发生的一种毁灭性病害。红薯发病后,分枝减少,节间缩短,叶子发黄,增厚变脆,自基部向上脱落。根部变黑腐烂。轻者减产三至五成,重者薯苗逐渐枯死,造成绝收。自1974年中牟县发现红薯根腐病以来,到1978年全省发病面积达百万亩以上,目前已遍及全省所有薯区,成为红薯生产的重要威胁。 Sweet potato root rot is a devastating disease in our province since the seventies. After the onset of sweet potato, branches reduced, internodes shortened, leaf yellow, thickening brittle, up from the base off. Root black rot. Reduce the production of three to five light, weight potato seedlings gradually withered, resulting in absolute failure. Since Zhongmou County found that root blight of sweet potato was found in 1974, up to one million mu of the province’s morbidity area was reached in 1978, and now it has covered all the potato areas in the province and has become an important threat to sweet potato production.