以连作早稻为研究对象，对影响水稻纹枯病发生、危害有关的因子，即品种、施氮肥量、气象因素、为害损失、发病时间、病情程度及药剂等作了系统的定量研究．结果表明，品种间存在抗病性和危害损失程度上的差异；施氮肥量与发病程度关系密切；气象因素中以日均温和雨日频率与病害流行速率关系密切；发病时间与为害损失率相关性不明显，药剂防治效果与控病时间、病情基数有关． Taking continuous cropping early rice as the research object, this paper systematically studied the factors that affect the occurrence and damage of rice sheath blight, namely, the variety, the amount of nitrogen fertilizer, the meteorological factors, the damage, the time of onset, the degree of disease and the medicaments. The results showed that there was a difference in the degree of disease resistance and harm loss between varieties; the amount of nitrogen fertilizer was closely related to the degree of disease occurrence; the daily average mild rainy day frequency was closely related to the epidemic rate of the disease; the onset time was related to the damage loss rate Sex is not obvious, drug control effect and disease control time, the condition of the cardinality.