Controlling tomato stripe virus disease
Stripe virus disease is an important tomato disease. Recently, the disease was found to have been found in some of the local open-air tomato plots in the city. In order to avoid the further spread of diseases, the onset symptoms, occurrence rules and control methods of tomato stripe virus disease are described below. Symptoms The disease occurs in the early stages of tomato growth, and parts of the plant can be damaged. Leaf: In the middle and upper leaves of the diseased plant, yellow-brown to black-brown irregular necrotic spots were scattered on the upper part of the diseased plant. Some had short brown spots along the veins of the leaves, and the petiole expanded toward the petiole to brown the petioles and yellowed the whole leaves. Stems: Primary dark green irregularly subdivided short streak spots, and later became dark brown oily necrotic streak spots, connecting up and down, the diseased plants gradually withered to death. Inflorescences and pedicels: They often form brown necrotic dots or plaques with large differences in size and shape, resulting in non-flowering, wilting and necrosis, or total shedding. Fruit: The deformity is hard, the lesions are light brown to dark brown, the epidermis is uneven, and the diseased fruit can be seen with brown streaks. Severe brown rot can be seen. The law of incidence The disease is mainly spread by mechanical friction, or invaded by micro-wounds, and the aphid does not transmit virus. High temperature, drought, strong light will help the disease. Tomato during the growing season of drought, or watering in the hot season is not timely, the disease is serious. After the onset of continuous rain, the disease is serious. Poor soil, compaction, stickiness, lack of fertilizer, and debilitating diseases are also serious. There is a significant difference in disease resistance among varieties. Control methods 1. Implement rotation. Seriously affected plots were implemented for more than two years of rotation with non-solanum crops. 2. Use resistant varieties. Using disease-free seeds or seed treatment, dried seeds can be dry heat-treated at 70°C for 2-3 days. Before sowing, soaking with fresh water for 3-5 hours, soaking with 10% trisodium phosphate solution for 20 minutes, then washing and sowing. 3. Field water and fertilizer management. High temperature and dry season watering timely, timely drainage after rain, to prevent the accumulation of water in the field. Apply enough base fertilizer, pay attention to the application of nitrogen, phosphorus and potassium fertilizers and appropriate application of potassium fertilizer to enhance the disease resistance of plants. 4. Chemical control. Spraying 2% amino oligosaccharine solution, 2% ningnanmycin agent, 40% ene hydroxymorpholine soluble powder, or 20% domperidone WP to control the disease development. 5. Dispose of the sick body in time. During the production process, the diseased plants were found to be removed and destroyed in a timely manner; after harvest, the plants were piled up in a flat sunny place and covered with waste shed film for high-temperature stacking; conditions were available to use mobile ozone agricultural waste treatment equipment on site quickly. Disinfection treatment to achieve the use of resources on the spot. Chemical Materials,Sodium Benzoate,Sodium Diacetate,Potassium Sorbate CHANGZHOU GUANGHUI FOOD INGREDIENTS CO.,LTD , https://www.gsweetfood.com