玉米粗缩病是近年来由灰飞虱传毒引起的一种毁灭性病毒病。植株感病后节间缩短，株型矮缩扁粗，叶片从生，雄雌穗不易抽出，受害叶片最初沿叶脉出现连续谈黄色条斑，从叶基部向尖端发展，后期叶脉上产牛褐色坏死斑，病叶提早枯死，致使产量降低。发病原因：一是当前生产上种植 Corn maize disease is a devastating virus disease caused by Laodelphax striatellus in recent years. Infected plants internodes shortened, plant type dwarfed flat rough, leaves from birth, male and female spike is not easy to extract, the victim leaves initially appeared along the veins continuous talk about yellow streaks, from the leaf base to the tip of the development of late veins on the production of brown Necrotic spots, sick leaves premature death, resulting in reduced production. Cause of the disease: First, the current production planted