五家渠垦区,一九五七年开始大面积种植秋白菜.当时,垦区南端已有病毒病发生.以后,病毒病渐向北部蔓延,到一九六一年而大发,损失极大. Five Drainage Reclamation Areas started to plant large quantities of autumn cabbage in 1957. At that time, a virus disease occurred in the southern tip of the reclamation area, and the virus spread gradually to the north in 1971. However, it was greatly devastated by the huge fatal blight in 1961.