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广东湛江地区的化州、高州、信宜等县近两年来发生一个水稻新病毒病,据报道1981年发病面积约11万亩,而1982年则发展至50万亩。以杂优稻的“汕优1号”、“汕优2号”、“汕优6号”、“汕优30号”和汕优36号”受害最重,常规稻的“包选二”、“桂朝”等高度感病,大糯则更感病。感病苗早死。感病株抽穗迟,穗小,空粒多,千粒重轻,成熟迟,少数形成包颈穗。一般发病田每亩减产160—250斤,严重发病田减产600斤,甚至失收。1982年晚造的杂优和常规稻也大面积发病,情况与1981年的基本相同。此病的主要症状为植株矮缩,叶片硬直,茎节变短,叶色浓绿,分蘖减少,在叶背和叶鞘上长出淡黄绿色近圆形小瘤,这是此病的特点。
A new virus of rice disease has occurred in Huazhou, Gaozhou and Xinyi counties in Zhanjiang, Guangdong Province in recent two years. It reportedly covered about 11 million mu in 1981 and 500,000 mu in 1982. The results showed that the best package of “Shanyou 1”, “Shanyou 2”, “Shanyou 6”, “Shanyou 30” and “Shanyou 36” , “Gui and Chao” and other highly susceptible, Dainuo is more susceptible .While susceptible plants premature death .While susceptible plants heading late, small spike, empty and more, one thousand light weight, mature late, a small number of inclusions formed neck .General onset 160-250 kilograms per mu yield reduction, severe catastrophe 600 kilograms yield reduction, or even lost .1982 made late hybrid and conventional rice is also a large area of disease, the situation is basically the same as in 1981. The main symptoms of this disease are plant short Shrinkage, hard blade straight, shorter stems, dark green leaves, tillers reduce the leaf back and leaf sheath grow yellowish green nearly round nodules, which is the characteristics of the disease.