大豆灰斑病又称褐斑病、蛙眼病,由真菌C ercospora sojina Hara引起,是世界性的病害,同时也是我国大豆主产区的一个主要病害,尤其在东北三省的发病最重。大豆灰斑病菌引起的病害在东北地区造成的产量损失在10%至30%之间。在阿根廷和巴西等国,据报道损失可达60%以上。灰斑病可在大豆的叶片、种荚和籽粒等多个部位发生,严重影响大豆的品质。目前对于该病的 Soybean gray spot, also known as brown spot, frog eye disease, is caused by the fungus C ercospora sojina Hara and is a worldwide disease. It is also a major disease in the main soybean producing areas of our country, especially in the three northeastern provinces. Diseases caused by Cercospora sojina in the northeast caused a loss of between 10% and 30%. In countries such as Argentina and Brazil, losses of up to 60% have been reported. Gray leaf spot can occur in many parts of soybean leaves, seed pods and grains, seriously affecting the quality of soybeans. Currently for the disease