七十年代以来,由干栽培措施不断改变,品种不断更新,水稻纹枯病亦日趋严重,并已成为当前水稻稳产、高产的阻碍.纹枯病的发生,是由病原菌Rhizoclonia solani寄生所致.病菌以病残株和菌核越冬的.菌核在稻田里于有利的条件下,可存活两年以上.越冬 Since 1970’s, the measures of dry cultivation have been constantly changed, the varieties have been continuously updated, and the sheath blight of rice has become more and more serious, which has become an obstacle to the steady and high yield of paddy rice at present.It is caused by the parasitic of pathogen Rhizoclonia solani. Bacteria to stubble and sclerotia overwintering. Sclerotinia in the rice fields in favorable conditions, can survive for more than two years.