After the tomato leaf curl virus disease showed that the upper leaves were yellow, the leaves were curled up, the leaves were shrunk and curled, the internodes became shorter, the flowering results were difficult, the fruit type was small, and the maturity was slow. The infected plants grow slowly and are significantly dwarfed.
Harmful tomato leaf curl virus disease is a devastating disease that can occur from the seedling stage to the harvest stage. Tomato leaf curl virus disease begins to spread between individual diseased plants by Bemisia tabaci, and then gradually expands the range of disease, and can be spread by farming operations such as snoring by pests and vegetable farmers during management. In the summer and autumn of 2006, the disease occurred in a large area in Zhejiang and other provinces.
The key to prevention and treatment of tomato leaf curl virus disease is to prevent the occurrence and harm of early tobacco whitefly. The seedling period and about one month after transplanting are the most critical period for the control of B. tabaci. Apply 40-60 mesh insect-proof nets during nursery to prevent the entry of B. tabaci, and also spray the systemic Aketai 2500 times solution; before transplanting, use Aketai 2500 times solution to fill the roots, valid for 20 ~30 days, not only can prevent the occurrence of early whitefly, but also play a strong seedling; after transplanting, the vents of the greenhouse should be closed with insect nets of 40 mesh or more, and it is best to hang insect-proof panels in the shed and find When the whitefly is used, it is necessary to carry out drug control. The better control method is to make the vent of the shed strict, and use the fumigant to fumigate once in the evening, and then use the Akthai 2500 times solution to spray the next day.
Once the disease occurs, in addition to spraying insecticides to control Bemisia tabaci, it is also necessary to spray drugs to prevent and treat the disease, such as virus A, trinitroribonazole, phytopathogenic, nymidine. High temperature and drought are also the conditions for the occurrence of tomato leaf curl virus disease. Diligent ventilation, small water pouring, reducing the temperature inside the shed can also effectively prevent the occurrence of the disease.
Insect net greenhouse also known as plant and vegetables greenhouse net. Used for prevent the insect fly into the greenhouse during the plant growing, and cover the plants. Key off the approaches that the pests (adult insect) breeding. Effective control of the spread of all kinds of harmful pests spread, such as Cabbage caterpillar, diamondback moth, aphids, flea beetles, Sweet agnates, American leaf miner, literal etc and prevent the harmful of virus spread. Significantly reduced the use of chemical pesticides, so that the planting vegetables good-quality and health.
Greenhouse Insect Net,Insect Mesh Netting,Insect Mesh
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