小麦丛矮病是由灰飞虱(Laodelphax striatellus Fallén)传播的一种病毒病,具有流行性和暴发性,可致小麦减产甚至绝收。小麦丛矮病的典型症状表现为叶片有黄绿相间条纹,分蘖增多,植株矮化,形成明显的丛矮状。冬前感病株大部分不能越冬而死亡,冬前未显症和早春及拔节后感病植株上部叶片显条纹,一般不能抽穗而提早枯死,有的能抽 The dwarf disease of wheat is a virus disease transmitted by Laodelphax striatellus Fallén. It is epidemic and explosive and can reduce or even reduce the yield of wheat. Typical symptoms of wheat clumpy dwarf disease showed yellowish green leaves and stripes, tillering increased, dwarf plants, the formation of a dwarf-shaped conspicuous. Most of the susceptible strains of winter before death can not win over the winter pre-symptom and early spring and post-jointing plant leaves of the upper part of the obvious stripes, the general can not heading and early dead, and some pumping