What should I do if the tomato planted in greenhouse suffers from wilt, withered leaves and serious tree death?

The greenhouse tomatoes planted at home are suffering from wilt, withered leaves and serious tree death, so immediate measures are needed:

1. The diseased plants with severe Fusarium wilt, including those that have died, should be pulled out immediately, and taken to the outside of the greenhouse for centralized and deep-buried treatment to reduce the source of pathogen infection. Unplug the original position of the plant and sprinkle quicklime or lime water for disinfection.

Don't water the temporary greenhouse. First, because Fusarium wilt is a soil-borne disease, with the continuous infection of watering bacteria, the spread of healthy plants can be prevented, while watering the greenhouse will continuously increase the humidity in the greenhouse and aggravate the occurrence of Fusarium wilt.

3. Ventilation and dehumidification to reduce the humidity in the greenhouse, so that the greenhouse environment is not suitable for diseases.

4. Immediately control the spraying of pesticides on other healthy or mild plants in the shed. Recommend 30% propamocarb? Azoxystrobin aqueous solution 300 times +32% oxazolone? Ethylicin emulsifiable concentrate 750 times.

Focus on spraying the stems of tomato plants to make the liquid medicine flow to the roots of tomatoes, thus playing a bactericidal role. Take the medicine after 5-7 days to consolidate the effect.

To tell the truth, the occurrence of Fusarium wilt is so serious that it must be caused by neglect of management at ordinary times. Tomato Fusarium wilt will definitely reduce production, and Fusarium wilt is also a common disease disaster of tomato. Personally, I am a greenhouse tomato, so let's share my experience from my personal point of view. First, I'll tell you what Fusarium wilt is, and then how to prevent it. Finally, let me talk about my personal planting experience. Symptoms related to tomato Fusarium wilt.

The symptoms of tomato bacterial wilt usually occur at the flowering and fruit-setting stage, and often occur at the same time as bacterial wilt, so the probability of bacterial wilt is very high when Fusarium wilt occurs. Common soil problems, such as soil salinization, will cause the yellow leaves of tomatoes to die. With the continuous cropping of tomatoes and the excessive use of chemical fertilizers, phosphorus, potassium, calcium and other elements will be slowly fixed by the soil, and after years of accumulation, the soil will become salinized.

According to the investigation, the incidence of soil salinization is about 30% when tomatoes are planted in greenhouses for more than 3 years, which is easy to cause the yellow leaves of tomatoes to die. The basic symptom of Fusarium wilt is that the middle and lower leaves of plants wither when the temperature is high at noon, and then recover when the temperature is low in the morning and evening.