山药块茎黑斑病在沛县有近百年的发病历史。但由于山药栽培面积小,没有引起人们足够的重视。近几年来,山药种植面积逐年扩大,山药黑斑病的危害也越来越严重。田间发病率一般为30～80％,严重的田块达100％,减产30～50％。为了控制山药黑斑病的危害与蔓延,我们于1987～1989年进行了综合防治试验,并取得了显著效果。 Yam tuberous spot disease in Peixian nearly a hundred years of history. However, due to the small area of ​​yam cultivation, it has not caused enough attention. In recent years, yam planting area has expanded each year, the dangers of yam black spot disease is also more and more serious. Field incidence is generally 30 to 80%, 100% of the serious plots, cut 30 to 50%. In order to control the harm and spread of yam black spot disease, we carried out comprehensive prevention and control trials from 1987 to 1989 and achieved remarkable results.