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白叶枯病是危害晚稻生产的主要病害之一,禾苗受害一般减产2—3成,严重的有五成以上,甚至颗粒无收。一九七九年田阳县晚稻白叶枯病发生面积达二万六千四百零三亩,占晚稻种植面积的17.3％,特别是杂交晚稻感病多,损失大。以四州公社为例,共种植杂交晚稻六千二百八十亩,其中三千一百五十二亩发病,占种植面积50.1％。为了探寻杂交晚稻白叶枯病发生规律,现对田阳县农业局和田州公社推广站作的大田调查结合气象资料进行分析。
Bacterial leaf blight is one of the main diseases that endanger the production of late rice. Generally, the yield of seedlings is reduced by 2-3%, and the serious ones are over 50%. In 1971, the area of late rice bacterial blight in Tianyang County reached 26,400 mu, accounting for 17.3% of the area planted with late rice. In particular, late hybrid rice had many diseases and suffered heavy losses. Take the four state communes as an example, a total of 6,280 acres of late rice hybrids were planted, of which 3,150 acres were affected, accounting for 50.1% of the acreage. In order to explore the occurrence of late blight in late hybrid rice, field surveys conducted by Tianyang County Agricultural Bureau and Tianzhou Commune Extension Station were combined with meteorological data.