大豆灰斑病菌(Cercospora sojina Hara)在黑龙江省东部三江平原低湿地区发生危害较重。根据我所几年来试验结果和生产调查,严重发病时大豆产量损失达30%,个别可达50%。选育抗病品种是解决大豆灰斑病危害的有效途径。我所从1976年开始进行大豆灰斑 Cercospora sojina Hara is more damaging in the low-humid areas of the Sanjiang Plain in the east of Heilongjiang Province. According to the results of my experiments and production surveys over the past few years, the serious loss of soybean production reached 30% and the individual up to 50%. Breeding of resistant varieties is an effective way to solve the hazard of soybean gray spot disease. Since 1976, I have carried out soybean gray spots