灰斑病(Cerocspora sojin Hara)在我省大豆产区均有分布,尤以东部三江平原低湿地区发生普遍,为害严重。灰斑病为害大豆叶、茎、荚子实,使产量和品质显著降低,并影响种子质量。一般减产12—15%,发病严重时减产达30%以上,感病子实的含油量、蛋白质含量和百粒重均有所降低。 Gray leaf spot (Cerocspora sojin Hara) are distributed in the soybean producing areas of our province, especially in low-humid areas in the eastern Sanjiang Plain, causing serious damage. Gray leaf spot damage to soybean leaves, stems, pod fruiting, the yield and quality significantly reduced, and affect the quality of the seeds. The general reduction of 12-15%, the incidence of severe cut when the production of more than 30%, the real child of the oil content, protein content and weight were reduced.