Why do tomatoes wither as soon as they bear fruit? What should I do?

Fusarium wilt is a kind of soil disease and a systematic disease that harms tomatoes. Tomatoes can get sick from seedling stage to the whole cycle. The pathogen invades from the root or root neck, so the symptoms gradually appear from the bottom up. The disease is highly contagious, but it is very slow. Sclerotinia sclerotiorum is a fungal disease. Old vegetable areas are very common. Like Weifang, the incidence of tomato Sclerotinia sclerotiorum is high, because it is an "ancient vegetable garden". Sclerotinia sclerotiorum spreads rapidly, but the pathogen mainly invades from the base of the diseased petiole. The leaves wither and die first, and then the bacteria that invade the stem will gradually appear. At first, the tomato stems showed sunken gray spots, then rotted, and the stems were covered with sclerotia and died. Conditions are slow.

Zazie Hoko

Tomato soft rot is a bacterial disease. There is a cut on the branch. When bacteria enter, the early lesions are blue-gray, short wetlands and rotten spots, which can be expanded in the later stage, sometimes reaching 1 m. The gray-brown spots on it are very long, and the inside of the stem changes from black to brown, with a strange smell. After falling into the water, it will shrink, turn white and sag within a week, which may lead to illness. But the course of disease is relatively slow. This pathogen can survive in pathogens or soil in winter, and can survive for 1 to 6 years, with the longest record of 25 years. High temperature and high humidity are conducive to the occurrence of diseases. Wounds on plants are channels for bacteria to invade. On the other hand, this pathogen will spread in rain, water, people, insects, farm tools, soil with bacteria, nematodes and fertilizers with bacteria. Rapid recovery after heavy rain or continuous rainy season and rapid temperature rise are all conducive to the spread of diseases.

Zazie Hoko

Fusarium wilt is difficult to treat. From the selection of disease-resistant varieties, the pH value of soil can be adjusted by rotating with Gramineae crops for more than 3 ~ 5 years, so as to achieve the purpose of being unfavorable to the growth of pathogenic bacteria. In planting management, early seedling raising and early transplanting are advocated to avoid high temperature season, because high temperature season can reduce diseases. Make full use of organic fertilizer to avoid flooding, and pour out the soaked water in time after rain to avoid water damage to the roots. In daily management, especially in breeding, surface treatment should be done well to prevent people from taking part in the work, wine bottles should be pulled out in time, wine should be destroyed and sick blood should be disinfected.

Zazie Hoko

Tomato plants are prone to get sick in places with high temperature and humidity. Continuous sowing throughout the year may cause a series of diseases, leading to the decline of tomato yield and quality. This is an obstacle to continuous planting. This solution can use microbial agents to improve soil and dissolve venom. Of course, many companies in the mayor/market have planted disease-resistant plants. Tomatoes will be destroyed in a few days, so in order to prevent rain, we must resist Fusarium wilt in time. Be careful not to water the results. Watering can swell the palms of crops. It leads to insufficient nutrition and causes tomato diseases. Pathogens overwinter in soil or seeds, spread through wind and rain, and then invade the stomatal epidermis of tomatoes, thus causing diseases. When the temperature is between 20 and 25 degrees Celsius, it is easy to get sick, especially in rainy days. Georgia, low-lying areas, places with too much water or poor ventilation are prone to illness, so be sure to pay attention.