病毒病是蚕豆的重要病害,是蚕豆不能稳产的主要原因。常年,病毒病导致减产15—20％;1959—60年度是大流行年,减产30％左右;1962—63年度是特大流行年,减产70—80％,不少田块其至颗粒无收。 蚕豆苗期感病,先期卽行死亡,存活者亦无生产力;花期感病,产量损失74.02％; Virus disease is an important disease of broad beans, is the main reason that beans can not be stable. In perennial years, the virus disease led to a 15-20% reduction in production. In 1959-60, the year was a pandemic year, a reduction of 30%. In 1962-63, it was a pandemic year with a yield reduction of 70-80%. The Vicia faba L. seedlings were susceptible to the disease and died early in the process of survival. The survivors also had no productive capacity. The susceptible flowers had 74.02% loss of yield.