我国水稻病毒病和类菌原体病已知有10种,其中以黄矮病(暂黄病)和矮缩病的发病面积最大,为害最重。六十年代中期以来,在南方11个省、市、自治区相继流行。七十年代中期随杂交稻的推广,病害再次流行,1977年仅湖南省常德、益阳、岳阳三地区就损失稻谷3.3亿斤,益阳地区180万亩杂交晚稻有150万亩发病, There are 10 species of rice virus disease and mycoplasma disease known in our country, of which, the incidence of yellow dwarf disease (Huang Huang disease) and dwarf disease is the largest, the most serious damage. Since the mid-1960s, 11 provinces, municipalities and autonomous regions in the south have been prevalent. In the mid-1970s, with the popularization of hybrid rice, the disease became popular again. In 1977, only 330 million kg of rice was lost in the three areas of Changde, Yiyang and Yueyang in Hunan Province. In the area of ​​Yiyang,