通过调查、介体接种传毒试验和电镜观察，明确陕西省目前玉米病毒病主要种类有玉米粗缩病（ＭＲＤＶ） 、玉米矮花叶病（ＭＤＭＶ） 和玉米红叶病（ＭＲＬＶ）３ 种。其中以玉米矮花叶病分布最广，几乎遍布全省所有玉米产区，玉米粗缩病次之，主要发生在渭南、西安、咸阳等关中东部灌区，玉米红叶病则仅在渭北及关中小麦黄矮病重发区常见 Through investigation, media inoculation toxicity test and electron microscope observation, the main types of maize virus diseases in Shaanxi province were identified as maize dwarf disease (MRDV), maize dwarf mosaic disease (MDMV) and maize leaf mosaic disease (MRLV). Maize dwarf mosaic disease is the most widely distributed, almost all over the province of all maize producing areas, followed by corn rough, mainly in Weinan, Xi’an, Xianyang Guanzhong eastern irrigation areas, maize mosaic disease only in Weibei and Guanzhong Wheat yellow dwarf recurrence common