番茄花叶病是番茄露地和保护地栽培上一个重要病害。防治该病,可采用选育抗病品种、改善栽培管理、消灭毒源、防治传毒昆虫和控制传毒媒介、应用药剂等措施,但防治效果都有一定局限性。目前,一些国家正研究和应用弱毒性病毒防治番茄花叶病,已取得初步成功,并部分地应用于生产。一、利用弱毒性病毒的概况早在1933年,萨拉曼(Salaman)就曾报导:感染了马铃薯X病毒的弱毒系统(G型)的烟草,再接种比它毒性更强的(L型)或产生 Tomato mosaic disease is tomato open field and protected cultivation is an important disease. To control the disease, measures such as selecting and breeding resistant varieties, improving cultivation and management, eliminating drug sources, preventing and controlling transmitted insects and controlling transmission media can be adopted, but the control effect has some limitations. At present, some countries are studying and applying the attenuated virus to prevent and cure tomato mosaic disease and have achieved initial success and are partially applied to the production. I. Overview of the use of attenuated viruses As early as 1933, Salaman reported that tobacco infected with the attenuated system of potato X virus (type G) was inoculated with more virulent (type L) Or generated