一、发现经过;一九七九年七月间,我们在沙县洋坊检测田间叶蝉的自然带毒率中,发现经由电光叶蝉(Rrcilia dorsalis)取食的稻苗里面,有表现典型橙叶症状的病株.鉴于当时我国已经确证的黄化类型的水稻黄叶病(Transitory yellowing,通称黄矮病)和黄萎病(Yellow dwarf)只能由几种黑尾叶蝉传播,而非电光叶蝉所能传播,因此,我们顺藤摸瓜做了进一步的试验. First, found that after; in July 1979, we measured the natural entomology of leafhoppers in Yangfang, Shaxian County, we found that rice plants fed by Rrcilia dorsalis inside, there are typical orange Leaf symptom of the disease.In view of the yellowing type of yellow leaf disease (Transitory yellowing) and yellow dwarf (yellow dwarf) in our country confirmed at that time can only be transmitted by several black leafhopper, rather than Light leafhoppers can spread, therefore, we follow the test done further.