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一九七五年春,我们在温室进行黑尾叶蝉(Nephotettix Cincticeps)越冬代的自然带毒率测定中,发现一株奇异的草状病苗。同年早季,在我院教学农场溪口坂的龙革16号品种上(处于孕穗期)查到2株与此类似的草状病株。同年晚季(9月初,分蘖末)在我院农学系品种圃上看到这样的零星草状病株。一九七六年九月,在沙县青州公社涌溪大队涌溪矮品种上发现面积较大的丛簇型病株,在田间有明显的发病中心,多在田边发生,发病率可达15%以上,分布也很不规则,即使同一丛稻禾,也杂有健苗和病苗,将病苗剪掉,在防虫情况下抽出的再生稻显示了同样的症状。
In the spring of 1975, we detected a virulent grass-like disease vaccine in the natural venom test of the Nephotettix cincticeps overwintering generation in the greenhouse. In the early autumn of the same year, two grasshopper strains similar to this were found on Longgui 16, Xikouban, a teaching farm in our college. In the same year late season (early September, late tillering) in our hospital agronomic variety nursery to see such a sporadic grass-like disease. In September 1976, a large cluster of clumps were found on the weeds of the Yongxi Brigade in Chungxi, Qingzhou commune, Shaxian County. There were obvious centers of disease in the field, mostly in the Tanabe area, with a prevalence of up to 15 % Or more, the distribution is also very irregular, even if the same rice pods, but also mixed with seedlings and seedlings, the vaccine will be cut off, in the case of pest control out of ratoon rice showed the same symptoms.