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1974年,广东湛江地区的部分晚稻在生长的中后期,发现叶鞘变褐,叶片干枯,结实不好的现象,群众称之为“黑骨”。后来,广西、湖南、湖北、福建、安徽等省(区),也相继发现这种病害。这是过去国内尚未报导的一种水稻新病害,经过几年来的研究,我们初步定名为稻螨褐鞘病。一、为害情况据信宜和高州等县群众反映,此病在1971年开始发生,近年来逐渐蔓延,尤以丘陵和半丘陵地区发病较多,病情指数高达50-97。它主要为害晚稻,大多在孕穗至抽穗期盛发,一直为害到收获。发病初期,在田间会看到明显的发病中心,由点到面迅速扩大,中心病株的
In 1974, a part of late rice in Zhanjiang area of Guangdong Province was found in the middle and late stages of growth. It was found that the leaf sheath was brown, the leaves were withered and did not grow well, and the masses called it “black bone.” Later, Guangxi, Hunan, Hubei, Fujian, Anhui and other provinces (districts), have also found this disease. This is a new disease of rice that has not been reported in the past in our country. After several years of research, we initially named it as Oryza scabies. First, the damage situation It is believed should be high and other counties and counties reflect the disease began in 1971, the gradual spread in recent years, especially in the hilly and semi-hilly areas more incidence index of up to 50-97. It mainly infects late rice, mostly in the booting to heading, has been harmed to harvest. Early onset, in the field will see a clear center of morbidity, rapidly expanding from point to point, the center of diseased strains