抗稻瘟病品种的利用是稻瘟病综合防治的重要途径,亦是多年来极其明确的方向,并在农业生产中取得了显著的成效。宁夏自1970年以来的十多年间,稻瘟病没有发生流行,就是利用抗病品种的成果。从生产实践看,随着农业生产水平的发展和栽培技术的改进,育种部门引种或培育出高产、耐肥、优质的良种。但是,这些良种又都随着大面积的推广,受到稻瘟病的袭击而从生产上淘汰了下来,人们不得不采用新的抗病品种来替代。品种抗病性的变化引来品种的更换,在国内外已不是为数很少的例证。宁夏自五十年代以 The use of blast-resistant varieties is an important way for the comprehensive prevention and control of blast disease. It is also an extremely clear direction for many years and has achieved remarkable results in agricultural production. In Ningxia, more than 10 years since 1970, there has been no epidemic of rice blast, which is the result of using resistant varieties. From the perspective of production practice, with the development of agricultural production and the improvement of cultivation techniques, breeding departments introduce or cultivate high-yielding, fertilizer-resistant and high-quality seeds. However, these elite varieties have all but been eliminated from production with the promotion of large-scale popula- tion by the blast. People have to use new resistant varieties instead. Varieties of disease-resistant changes lead to the replacement of varieties, is not a few examples at home and abroad. Ningxia since the fifties