立枯病在水稻旱育秧田经常发生,其发病特点为水稻2叶期后秧苗成簇矮小桔黄或失水青枯,一般病床发病率10％,严重者达80％以上。 该病由土壤中的真菌侵染引起,过去认为其病原菌为镰刀菌和立枯丝核菌,常用的防治药剂为敌 Blight often occurs in rice nursery seedlings. Its onset is characterized by clusters of small yellowish orange or dehydrated corolla of seedlings after 2-leaf stage of rice. The incidence of common bed is 10% and severe cases are more than 80%. The disease caused by the fungal infection in the soil, the past that the pathogenic bacteria Fusarium and Rhizoctonia Rhizoctonia, commonly used as a control agent enemy