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水稻叶尖干枯病在日本,缅甸,奥地利,意大利以及我国浙江,江苏,云南等省均有发生。近年来在我省普遍出现,有些地方发病相当严重。例如东莞县寮步公社晨塘大队发病较重的品种“珍万选”在一些田块中株发病率达89.6％,病情指数为66.8,英德县横石水公社的一些“珍珠矮”亩块,株发病率也达到69.9％,病情指数为37.7,一般发病田如曲江县马坝公社和翁源县翁城公社的“珍珠矮”田块,株发病率分别达到53.2％和45.6％,病情指数为11和9.2。
Rice leaf tip blight occurred in Japan, Myanmar, Austria, Italy and China’s Zhejiang, Jiangsu and Yunnan provinces. In recent years, widespread in our province, in some places the incidence is quite serious. For example, Dongguan County Liaobu commune morning pond brigade heavier varieties “Zhen Wan election” in some plots in the incidence rate of 89.6% strains, the disease index was 66.8, Yingde County Hengshui commune some of the “pearl dwarf” acres The disease incidence rate reached 69.9% and the disease index was 37.7. The incidence rates of common pests such as “pearl short” field in Maba commune of Qujiang County and Wengcheng commune in Wengyuan County reached 53.2% and 45.6% respectively, The disease index was 11 and 9.2.