八十年代以来,三江平原大豆灰斑病发生日趋严重,对大豆产量和质量及出口创汇影响很大,已成为当前迫切需要解决的问题。一、发生为害情况大豆灰斑病,在佳木斯地区1981年全区性大发生,1983年不完全统计发生面积86万亩,1985年200多万亩,1986年290万亩, Since the 1980s, the occurrence of Sian Gray Spot of Soybean in the Sanjiang Plain has become more and more serious. It has a great impact on the output and quality of soybeans and foreign exchange earned from exports. It has become an urgent issue to be solved. First, the incidence of soybean gray spot disease situation, Jiamusi region in 1981 occurred in large area, in 1983 the incomplete statistics area of ​​860000 acres, more than 2000000 acres in 1985, 2.9 million acres in 1986,