一、症状染病植株有的出现扭曲生长.有的发生严重矮化,间节缩短呈丛矮状,叶色浓绿,叶片变厚,短而宽,硬而脆,密集丛生,背面叶脉上产生粗细不一的蜡白条突起,用手触摸有明显的粗糙感,植株矮化严重。5片叶前感病,一般不能抽穗;7片叶后感病仍能抽穗结实,但果穗小而畸形。 First, the symptoms of some plants appear distorted growth, and some serious dwarf, interspersed shortening was a dwarf, dark green leaves, thicken, short and wide, hard and brittle, dense clusters, the back of the veins produced Varied wax white stripes protruding, hand touch a clear sense of roughness, plant dwarf serious. 5 leaves before the disease, the general can not heading; 7 leaves after the disease can still be heading strong, but the ear is small and deformity.