大豆灰斑病在我省是大豆生产上的主要病害之一,该病一般发生年份可使大豆减产10～15%.严重发生时可减产30%左右,而且由于种子上病斑影响,严重的使种子外观和品质变劣。解决该病行之有效的措施是应用抗病品种。为此,黑龙江省农作物品种审定委员会于1987年确定了大豆报审品种必须统一进行灰斑病鉴定。合江农科所大豆灰斑病研究课题组承担了此项工作,五年来对全 Soybean gray spot disease is one of the main diseases in soybean production in our province, and the disease can reduce the yield of soybean by 10-15% in the year of occurrence and about 30% in the serious occurrence, and due to the influence of the spot on the seed, Defects the appearance and quality of seeds. Effective measures to solve the disease is the application of resistant varieties. To this end, Heilongjiang Province Crop Variety Approval Committee in 1987 identified the trial of soybean varieties must be unified gray spot identification. Hejiang Agricultural Soybean gray spot disease research group assumed this work, five years on the whole