Can greenhouse tomatoes die seriously? Is there any way to save them?

Tomato bacterial canker mainly invades through wounds, but can also invade directly from the stomata or fruit surface. During the tomato growth period, warm and humid weather, rainy weather or long-term condensation are conducive to the disease. After the disease occurs, partial application of nitrogen fertilizer or flood irrigation will lead to the spread of the disease. Prevention and control measures: 1. Do a good job of disinfecting seeds. 2. Strengthen greenhouse management, implement crop rotation, and implement crop rotation with non-solanaceous vegetables for more than three years. 3. Fertilize properly. Increase the application of phosphorus and potassium fertilizers and control the amount of nitrogen fertilizers. 4. Weed in time and avoid operating with dew. Remove diseased plants as soon as they are discovered. Proper ventilation and light transmission are beneficial to the growth of tomatoes and improve disease resistance. 5. In the early stage of the canker disease, use copper hydroxide, octostrobin, zhongshengmycin, phylloxazole, and agricultural streptomycin to prevent and control the disease by spraying. Spray again 2-3 times every 5-7 days.