Many vegetable farmers neglect to manage tomatoes in the early spring of greenhouses, which often leads to frequent diseases and premature seedling failure in the late growth stage of tomatoes, which directly affects the yield and quality. The following work should be done in the later management of greenhouse tomatoes:
1. Prevent premature plant failure
In the later stage of tomato growth, due to the long branches, the route of nutrients from the roots to the tip is also longer, and the nutrient supply is often insufficient, resulting in the phenomenon of seedling failure. Therefore, the management should be strengthened at this stage to avoid premature plant senescence in the later stage. The main points should be as follows:
1. It is necessary to pluck the top, thin the leaves, and beat the branches in time. After the last ear of fruit sits, it is necessary to hit the top heart in time, and the side branches that usually grow between the nodes should be erased in time, and the old leaves, yellow leaves, and diseased leaves in the lower part of the plant should be thinned in time to reduce nutrient consumption and make the plant concentrate nutrients to promote fruit expansion.
2. Spray foliar fertilizers and plant growth regulators. After the last ear of fruit swelling, there is no need to carry out fertilizer, if the plant has symptoms of deficiency or seedling failure, the application of 0.5% potassium dihydrogen phosphate mixed with 6000 times of liquid Aiduoshou foliar spray, the effect is better.
Second, fertilizer and water management should keep up
Tomatoes require a lot of fertilizer, and in the case of sufficient basal fertilizer, reasonable topdressing should still be carried out. Tomatoes mainly need nitrogen and potassium fertilizers in the later stage of growth, and urea and potassium sulfate can be supplemented to ensure that the fruit expands rapidly.
The type of topdressing in the fruiting period is suitable for special compound fertilizer, and the amount of topdressing should be flexibly controlled according to the growth status of the plant. Combined with watering, about 15 kg of water-soluble compound fertilizer is applied per mu each time. In the peak fruiting period, in order to improve the fruit quality and improve the good fruit rate, 1% superphosphate or 0.1%~0.3% potassium dihydrogen phosphate solution can also be sprayed on the foliar surface. Tomatoes are drip irrigated under the film, which can reduce the occurrence of diseases. After entering the full fruit period, when each batch of fruits begins to expand, it is necessary to water 1~2 times of "strong fruit water", and the amount of water can be appropriately increased.
3. Strictly prevent pests and diseases
Pests and diseases will not only affect the yield of tomatoes in the later stage, but also the pathogenic bacteria that spread everywhere will remain in the shed and harm the next crop of vegetables. Therefore, effective measures should be taken in the later stage of tomato growth to prevent the occurrence of pests and diseases. The main points should be as follows:
1. Set up an insect-proof net at the air outlet to avoid aphids, mites, thrips, whiteflies and other pests from sneaking into the shed, directly harming vegetables or introducing viruses into the shed to infect vegetables. For the pests that sneak into the shed, a yellow plate can be set up in the shed to trap them, and 1500 times of 3% acetamiprid mixed with 10% imidacloprid wettable powder 2000 times liquid spray can be used for control.
2. Spray in time. Generally, the diseases that often occur in the later stage of tomato include leaf mold, virus disease and bacterial leaf spot, which can be sprayed and controlled in time at the beginning of the disease. Leaf mildew disease is controlled by spraying 800 times of 47% Garinon wettable powder, 500 times spraying of virus A for viral diseases, and 500 times spraying of DT500 times for bacterial leaf spot disease, which can effectively control the development of the disease.
Strengthening the post-growth management of greenhouse tomatoes is introduced here, and I hope it will be helpful to you. If you want to buy high-quality and high-yield tomato seeds, you can download the seed bank App, and the country's excellent tomato varieties are available for everyone to choose.
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