Plant Protection Technology

400712 Institute of Citrus, Chinese Academy of Sciences Zhang Gecheng Li Jixiang
Liu Kaiyin, Hushi Town, Longtan District, Luzhou City, Sichuan 400712

　　Virus disease is one of the main diseases of tomato. It occurs in all tomato producing areas in north and south of our country. The incidence rate is about 30%. In severe cases, it can cause the entire region to lose harvest and become a threat to the open field in summer and autumn and greenhouse tomatoes in late autumn and early spring. The main disease.
　　 Tomato virus disease is caused by a single or combined infection of Cucumber Mosaic Virus CMV and Tobacco Mosaic Virus TMV. According to records, CMV hosts 124 species of plants in 45 families, including melons, nightshade, beans, cruciferous vegetables, celery, lettuce, and various flowers and weeds. It mainly relies on aphids, such as green peach aphid, cotton aphid, radish aphid, and other winged aphids and various instars to transmit the poison, and it can be transmitted through juice. TMV can infect 236 species of plants in 33 families and invade from wounds mainly by contact; it can survive the winter in a variety of perennial hosts and some cultivated crops, and attach to various agricultural tools and daily necessities through various agricultural activities in the field. Among them, tomato branches and overalls worn during operation carry the most poison. The entire cultivation and management process of tomato seeds and seedlings to the field are easily spread by human hands and tools. . .