一、发生概况:蚕豆癌疱病是四川西北高原近几年暴发的一种主要病害。这种病害普遍发生于春蚕豆产区,以松潘、小金等县较为严重,仅松潘县发病面积就近三万亩,分布海拔高度约为2,500—3,400公尺。罹病植株茎叶起疱(小肿瘤)、叶片卷曲,重者矮化萎缩,对产量影响较大,估计因病减产10— First, an overview: Fava bursal disease is a major disease outbreak in Sichuan Northwest Plateau in recent years. The disease generally occurs in the spring broad bean producing areas, with Songpan, Xiaojin and other counties more serious, only Songpan County, the incidence of nearly 30000 acres, the distribution altitude of about 2,500-3,400 meters. Diseased plant stems and leaves blisters (small tumors), leaf curling, dwarf weight atrophy, a greater impact on yield, it is estimated that due to disease reduction 10-