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近年来,茭白纹枯病在全国茭自种植地普遍发生,由于生产上氮素化肥用量增加等原因,该病发生日趋严重。该病属于真菌类病害,破坏茭白组织和茎、叶的光合作用,削弱根部吸收能力,降低茭白的营养物质积累,一般病株率30%~50%,重病田块发生率80%以上,严重时能引起茭白的腐烂、倒伏等。茭白纹枯病属于高温高湿性病害,温度在25℃~32℃,相对湿度达95%以上时发病重。
In recent years, white blotch sheath blight occurs widely in the country since its planting. Owing to the increase in the amount of nitrogen fertilizer used in production and other reasons, the disease is becoming more and more serious. The disease belongs to the fungal diseases, which destroy the photosynthesis and the photosynthesis of the stems and leaves, weaken the absorption capacity of the roots and reduce the accumulation of nutrients in the diseased leaves. The average diseased plants rate is 30% ~ 50%, the incidence of severe diseases is more than 80% When can cause white rot, lodging and so on.茭 white blight is a disease of high temperature and humidity, the temperature at 25 ℃ ~ 32 ℃, the relative humidity of more than 95% of the disease.