随着亚麻播种面积的扩大,亚麻复合苗病在坝上地区发生日趋严重。据1983—1984年抽样调查,一般田的病苗率为15—30％,枯苗率为5—10％,发病严重地块的枯苗率达到50％以上,平均减产9.4—10.4％,少数地块甚至毁种绝收。1985年坝上各县发病总面积达10万公顷,占播种面积的80％以上。其中严重减产或绝收面积5千公顷,损失 With the expansion of flax sown area, flax compound disease is more and more serious in Bashang area. According to the 1983-1984 sample survey, the general field of disease and seedling rate of 15-30%, seedling rate of 5-10%, the incidence of severe nursery stock block rate of 50% or more, an average reduction of 9.4-10.4%, a small number Even the destruction of land plots harvest. In 1985, the total area of ​​the incidents in Bashang reached 100,000 hectares, accounting for more than 80% of the sown area. Among them, a serious area of ​​5,000 hectares is lost or harvested