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1995年小麦黄矮病在平山县普遍发生,特别是地西部山区暴发成实,造成较大损失。 一、为害 小麦黄矮病1989年在平山县严重发生,但近几年发生很轻,1995年在全县不同生态类型区麦田普遍发生,西部山区暴发成灾,重发区的发病面积达2500亩,占播种面积的83.3％。 发病症状:小麦越冬、返青期生长健壮,无异常现象,3月下旬至4月上旬,第一次肥水后,病株基部叶片发黄,特别是4月下旬小麦孕穗期,病情突发,植株显著矮缩,叶片黄化,严重影响抽穗,即使抽穗也是蝇头小穗,而且株高是正常株高的1/3,分蘖节上部大部干枯死亡。
Wheat yellow dwarf disease occurred in Pingshan County in 1995, especially in mountainous areas in western China, resulting in greater losses. First, the damage wheat yellow dwarf disease in Pingshan County occurred in 1989, but occurred very lightly in recent years, the county in 1995 in different ecological types of wheat fields generally occur, the western mountain outbreaks, the incidence of recurrent area of 2500 Mu, accounting for 83.3% of sown area. Symptoms: wheat overwinter, turning green growth robust, no abnormalities, from late March to early April, the first fertilizer after the yellow leaves of the base of the plant, especially in late April booting stage of wheat, the disease broke out, plants Significant dwarfing, leaf yellowing, seriously affecting the heading, even if the heading is also a spikelet head, and the plant height is 1/3 of the normal plant height, most of the upper part of the tillering death.