In recent years, due to the spread of virus-infected seedlings and virus-borne pests, the virus disease in tomato facilities has shown a tendency to expand year by year. In many places, vegetable farmers are incapable of dealing with this intractable disease, and they can only be seen everywhere. The tomatoes have lost yield or even lost. According to the teacher of the Tibet Tibet Autonomous Region, the common symptoms of tomato virus disease are mosaic, striae and fern leaves. Mosaic type: a kind of slight mosaic on the tomato leaves, the plant is not short, no deformation, the other is a clear leaf on the leaves, the new leaves become smaller, the leaves are small and narrow, distorted distortion, small fruit quality Bad, mostly flower-faced. Stripe type: the upper leaves show dark green and white mosaic lesions, the middle of the stem shows a dark green subsidence of the first short stripe, after the dark brown subsidence of oily necrotic stripe, fruit deformity, flesh epidermis sinking, long Oil immersed ring dead spots. Fern leaf type: The diseased plant is obviously dwarfed, and the lower leaf edge curls up. The tube is severely tubular. The upper leaf is small and forms fern leaf. Li Zangchao pointed out that to prevent and control viral diseases, we must first select disease-resistant varieties. According to the local main sources of poisons, disease-resistant varieties should be selected according to local conditions and virus-free seeds should be cultivated. Soak seeds in fresh water for 3-4 hours before sowing, then add 10% trisodium phosphate solution for 40-50 minutes, remove and rinse with clean water and then sow germination. Planting sites must use fields that have not been planted with tomatoes or where tomato virus disease has not occurred. Deep plowing must be performed. Also pay attention to the implementation of rotation. Avoid continuous cropping for many years to reduce the transmission of poisonous soil and residues of tomato virus disease and reduce the occurrence of viral diseases; nursery sites and planting sheds should completely eliminate the poisonous weeds and diseased plants and reduce the virus source of virus diseases. In the cultivation of disease prevention measures, one is appropriate sowing, nurturing strong seedlings, planting requires buds, but not aging; the second is timely early planting, to promote strong seedlings early hair; third is cultivating grass, timely soil, Promote rooting, late snoring, early harvest. Drug control, first in the early prevention and control of drug transmission of aphids, whitefly. The nursery sites and planting sites should be treated with spirotetramat (Muwangte) as soon as possible, and control the weeds, as well as the surrounding venomous mites and whiteflies, and prevent the spread of insect vectors such as mites and whiteflies, which can effectively prevent viruses. Infection, reduce the incidence of tomato virus disease. Li Zhachao pointed out that once tomato seedlings are found to show symptoms, Fengzi 750+ Ruiwei 3000x and Jiayuan dihydrogen potassium 500x fluid will be used immediately. After the occurrence of the disease, spraying every 5 days, even spraying 2-3 times, can be effective. Prevent the development of viral diseases. The Anti Rabies Vaccine For Human vaccine can prevent rabies. Rabies is a serious illness caused by a virus. The rabies virus is spread to humans through the bite or scratch of an infected animal. Dogs, bats, skunks, coyotes, raccoons, and foxes are examples of animals that can carry rabies. The rabies vaccine can protect you from infection if you are at high risk of exposure. The vaccine can also prevent infection after you are bitten by an infected animal. Anti Rabies Vaccine For Human,Rabies Vaccine Dose,Human Freeze Anti Rabies Vaccine,Rabies Vaccine Vero Cell For Human Changchun Zhuoyi Biological Co., Ltd , https://www.zhuoyi-bio.com
Damage to tomato virus disease in greenhouses intensifies early prevention and control
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