水稻白叶枯病是由稻白叶枯黄单孢杆菌(Xanthomonas campestris PV.oryzae)引起的。1974年首次在我区发现,如今已蔓延灌区9县、市。据1984年调查,60.43万亩水稻发病面积达4.56万亩,占调查面积的7.5％,有些县、市其危害程度超过当年(1984)稻瘟病的危害,造成水稻严重减产。目前对水稻白叶枯病尚无特效防治药 Rice bacterial blight is caused by Xanthomonas campestris PV.oryzae. It was first discovered in our district in 1974 and now it has spread to 9 counties and cities in the irrigation area. According to a survey conducted in 1984, the area covered by 60.43 million mu of paddy was 4.56 million mu, accounting for 7.5% of the surveyed area. In some counties and cities, the damage was more severe than the blast of that year (1984), causing a serious decrease in rice yield. At present there is no effective prevention and treatment of rice bacterial leaf blight