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期 刊 ：植物保护学报 2002年

关键词：茭白；纹枯病；发生规律；产量损失；

Keywords:Zizania caduciflora Turcz., Rhizoctonia sonani Kiihn, epidemic development, yield loss,

摘 要 ：茭白纹枯病发生规律与产量损失的研究结果表明:高温高湿、种植过密、偏施氮肥、缺乏钾素是病害加重的主要原因;田间发病盛期在7月中旬至8月中旬;单茭重减低率与病级之间呈极显著线性相关;始病期越早,危害越重,产量损失也越大;病害危害程度与有效分蘖数(孕茭数)减少率、单茭重减低率、产量损失率之间呈高度正相关。在产量损失构成中,有效分蘖数的减少为主要因素。

Abstract:The epidemic development of water bamboo sheath blight (Rhizoctonia sonani Kuhn) and its yield loss were investigated in 1991. The results showed that high temperature and humidity, over-density of plants, over-nitrogen and lack of potassium were favorabl

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