近年来,玉米粗缩病大流行,给玉米生产造成严重损失。据近年多点调查,麦田套种玉米,一般病株率30%左右,重者达50%以上,大蒜田套种玉米病株率高达80%以上。同时,出现了许多绝产地块。一、症状感病植侏显著矮化,节间变短,叶片变厚变宽,叶色浓绿,多数病株在叶背、叶鞘和苞叶上,有线条状蜡白色突起条纹,以后变成黑褐色。病株不能抽穗或虽能抽穗但穗小,结实不良。 In recent years, the maize pandemic has caused a serious loss to corn production. According to more surveys in recent years, corn intercropping maize, the general rate of diseased plants about 30%, more than 50% of the heavy, maize field interplanting maize strain rate as high as 80%. At the same time, there have been many deadlock plots. First, the symptom Sense of plant dwarf with dwarf, internodes shorter, thickened leaves thicker, dark green leaves, most of the diseased leaves in the leaves, leaf sheaths and bracts, there are lines of waxy white protruding stripes, after the change Into dark brown. Strain can not be heading or heading, but the ear is small, poorly sturdy.