近年来,由丝核菌Rhizoctonia sp.引起的蚕豆立枯病危害加重,冬春田间死苗发生普遍,一些重病田块因立枯死苗造成的缺苗断垅高达一成以上,对蚕豆绿肥和籽粒产量有明显的影响.1978～1980年,我们观察调查了蚕豆立枯病的为害症状及损失,分析了有关发病因素,进行了药剂防治试验. In recent years, the rhizoctonia Rhizoctonia sp. Caused by Vicia faba was harmed more and more. The dead seedlings were common in winter and spring fields. The number of severed seedlings in some seriously ill fields was as high as 10% From 1978 to 1980, we investigated and investigated the damage symptoms and losses of broad bean blight, analyzed the related risk factors and carried out the chemical prevention and control experiments.