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水稻纹枯病又称云纹病,是水稻生产上的一种常发性、普发性病害,水稻苗期至穗期各生育阶段均可发生,一般从分蘖期开始染病,孕穗到抽穗期形成发病高峰,到蜡熟期逐渐停止蔓延。由于栽培技术的不断改进和过量施用氮肥等原因,使水稻纹枯病发生为害日益加重,已上升为水稻生产上的主要病害,一般病株率15%~40%,减产10%~30%;严重者病株率达50%~100%,减产50%以上,出现不能抽穗和植株腐烂等情况。为了有效控制纹枯病的发生,保证水稻稳产高产,现将水稻纹枯病综合防治要点介绍如下。
Rice sheath blight, also known as moire disease, is a common and generalized disease in rice production. Rice can develop from seedling stage to heading stage. It usually starts from tillering stage and booting stage to heading stage The incidence of the formation of the peak to gradually stop the spread of waxy. Due to the continuous improvement of cultivation techniques and the excessive application of nitrogen fertilizer and other reasons, the occurrence of sheath blight of rice has been aggravating. It has risen to the major disease in rice production. The average rate of diseased plants is 15% -40% and the yield is reduced by 10% -30%. Serious cases of diseased plants of 50% to 100%, more than 50% reduction, there can not be heading and plant decay and so on. In order to effectively control the occurrence of sheath blight and ensure a stable and high yield of rice, the key points of integrated control of rice sheath blight are as follows.