一、立枯病基本可分为侵染型立枯病、生理型立枯病、冻害型立枯病、中毒型立枯病四大类型。该病是寒地水稻旱育秧及大棚盘育苗病害的总称,发病严重时会引起秧苗成片枯死,甚至毁苗。病菌在土壤中浸染能力极强而且外界对稻苗影响因素对该病关系密切,凡不利于稻苗生长的因素都能诱发此病发生。首先是育苗期间遇持续低温、阴雨、光照不足,水稻出苗晚、生长缓慢,病害加重。另外,种子质量差,水稻发芽力及生活力降低,抗病力差。其次,床土粘重、偏碱,播种过早过密,履土过厚影响种子发芽,秧田施氮肥过多,水分及通风管理差均利于立枯病发生。 First, the blight can basically be divided into infectious blight, physiological blight, freeze-blight fall blight, deadly blight four types. The disease is the cold paddy rice nursery stockings and greenhouse disease nurturing disease in general, serious illness will cause the seedlings into pieces dead, or even destroying seedlings. Pathogenic bacteria in the soil strong ability to digest and the impact of the outside world on the impact of rice seedlings of the disease are closely linked to the factors that are not conducive to the growth of rice seedlings can induce the disease. The first is the case of persistent low temperature during seedling, rainy, inadequate lighting, rice emergence late, slow growth, disease increased. In addition, poor seed quality, reduced rice germination and viability, poor disease resistance. Second, bed soil sticky, alkaline, too early sowing too soddy, affected soil is too thick, seed germination, too much nitrogen fertilizer in seedling, water and ventilation are poor benefit blight.