Tomato planting techniques: what is Tomato Leaf Curl virus Disease?

What is tomato leaf curl virus disease? Please introduce that after tomato leaf curl virus disease is infected, the upper leaves become smaller, the leaf margin curls up, the leaves wrinkle and curl, the internodes become shorter, it is difficult to blossom and bear fruit, the fruit shape is small, and the ripening is slow. The infected plants grew slowly and were obviously dwarfed. Tomato leaf curl virus disease is a destructive disease, which can occur from seedling stage to harvest stage. Tomato leaf curl virus disease began to spread by Bemisia Tabaci among individual diseased plants, then gradually expanded the scope of the disease, and could be spread through agricultural operations such as pest and vegetable farmers' forking during management. In summer and autumn of 2006, the disease occurred in a large area in Zhejiang and other provinces. From August to October 2007, the disease occurred in Fugou County, our province. Tomato leaf curl virus disease commonly occurred in the land, which could reduce the yield by 50% to 80%. When the disease occurred seriously, there was no fruit in the whole shed. At present, it is predicted that there is a trend of spreading from south to north. The key to the prevention and control of tomato leaf curl virus disease is to prevent the occurrence and harm of Bemisia Tabaci in the early stage of tomato. The seedling stage and one month after transplanting is the most critical period for the control of Bemisia Tabaci. When raising seedlings, 40 × 60 mesh insect control net should be used to strictly prevent the entry of Bemisia Tabaci, and at the same time, 2500 times of Aktai solution should be sprayed. Before transplanting, 2500 times liquid of Aktai should be used to irrigate roots with a period of validity of 20 days, which can not only control the occurrence of Bemisia Tabaci in the early stage, but also play the role of strong seedlings. After transplanting, the ventilation of the greenhouse should be closed with an anti-insect net of more than 40 meshes, and it is best to hang an anti-insect board in the shed. When Bemisia Tabaci is found, drug control should be carried out. The better control method is to close the vents of the shed, fumigate once with fumigant in the evening, and spray with Aktai 2500 times liquid the next day. Once the disease occurs, in addition to spraying insecticides to control Bemisia Tabaci, it is also necessary to spray agents to control the disease, such as virus A, triazoles, Zhixianling, Ningnanmycin and so on. High temperature and drought are also the conditions for the occurrence of tomato leaf curl virus disease. Frequent ventilation, frequent watering of small water and lowering the temperature in the greenhouse can also effectively prevent the occurrence of the disease. Click to get more tomato planting techniques click to get more vegetable planting techniques