水稻白叶枯病1974年8月中旬在本区灵武县新华桥公社华二大队四队京引39号丰产稻田首次发现,1976年扩展到7县37个公社的17140亩,1977年扩展到32900余亩,有的发病率高达94%,多集中分布在高产稻区。1979年以来,由于采用了抗病品种、稻种消毒、秧田喷药、合理排灌和用肥、适期插秧与消灭菌源等综合防治措施,发病面积减少 Rice bacterial blight In the middle of August 1974, Xinhua Bridge commune Xinhua Bridge commune, fourth battalion of two sets of Beijing-cited No. 39 high-yield paddy fields in Lingwu County for the first time found in 1976 expanded to 17140 acres of 37 communes in 7 counties in 1977, More than 32,900 acres, some incidence as high as 94%, mostly concentrated in high-yielding rice area. Since 1979, due to the use of resistant varieties, rice germ disinfection, spraying seedlings, rational irrigation and fertilization, proper transplanting and elimination of bacteria and other comprehensive prevention and control measures, reducing the incidence of area