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茭白锈病是茭白生产中一种重要病害,特别是在南方地区发生较多,给茭白生产造成较大损失,病株率常达60%,严重时可达100%。一般3—4月气温回升后开始发病,4—9月为锈病发生期,6—8月为发病高峰期。温暖多雨的潮湿天气、种植密度过大、植株疯长、偏施氮肥均有利发病。植株下部的茎、叶发病早且重。1.发病症状主要为害叶片和叶鞘。叶片及叶鞘散生褪绿小点,逐渐稍隆起为黄色
茭 White rust is one of the most important diseases in catfish production, especially in the southern part of China. It causes great losses to catfish production. The rate of diseased plants is often up to 60% and in severe cases up to 100%. Generally 3-4 months after the onset of temperature rise, 4-9 months for the occurrence of rust, 6-8 months for the peak incidence. Warm and rainy wet weather, planting density is too large, plant crazy, biased nitrogen fertilizer are beneficial disease. The lower part of the plant stems, leaves early onset and heavy. 1. The main symptoms of damage leaves and leaf sheaths. Leaves and leaf sheaths scattered chlorotic small dots, gradually slightly yellowing