在各类病害中，病毒病最难防治，且每种作物上都有不止一种病毒病。据调查，各地番茄、辣椒、茄子、烟草等茄科作物发生普遍，尤以烟草花叶病毒和黄瓜花叶病毒引起的花叶病、条斑病和厥叶（鸡爪子叶）病严重。保护地蔬菜栽培由于倒茬困难，多年连作，致使病毒病呈逐年蔓延加重 Among various diseases, the most difficult to control the virus disease, and each crop has more than one virus disease. According to the survey, tomatoes, peppers, eggplants, tobacco and other solanaceous crops are common everywhere, especially mosaic virus caused by tobacco mosaic virus and cucumber mosaic virus, leaf streak and Jue Ye (chicken paw leaf) disease is serious. Vegetable cultivation in protected areas due to the stubble difficult, years of continuous cropping, resulting in increased viral disease was increased year by year