How to manage tomatoes in autumn? Mastering these key points is essential
Tomatoes are one of the most popular fruiting vegetables, rich in nutrients, with a sweet and sour taste, and in high demand in the market. They are generally planted in spring, but some growers also plant them in autumn to increase profits. So how should autumn tomatoes be managed? Let's take a look.
1. Temperature and humidity control
During the flowering period of tomatoes, the suitable daytime temperature is 25-30 degrees, and at night 20-15 degrees. Below 15 degrees or above 30 degrees will cause flower and fruit drop as well as physiologically deformed fruit. So if the temperature is too high, shade with a light rain cover during the day or increase ventilation; if the temperature is too low, add a plastic film cover at night. The suitable temperature difference is 12-20 degrees. In addition, the humidity in the greenhouse should also be controlled. After the tomato seedling-strengthening stage, the water requirement increases greatly. At this time, water should be replenished in time to avoid alternating drought and moisture, and ensure a uniform water supply.
2. Fertilizer and water management
Fertilizer and water management is the most important part of the tomato growth process. Generally, 7-10 days after planting, apply a root-setting and seedling-reviving fertilizer together with watering. When the plant grows to more than 20 cm, combined with watering, fertilizing and the fertilizer requirements of tomatoes, 2-4 kg of Dayi balanced water-soluble fertilizer per mu can be broadcast or drenched. During fertilization, attention should be paid to the application of calcium nitrate and potassium sulfate, and nitrogen fertilizer should be applied as little as possible to avoid stem rot caused by excessive nitrogen. Calcium deficiency can also cause blossom-end rot and bacterial diseases. During the fruit expansion period, to prevent hollow fruit, pay attention to supplementing boron fertilizer. To prevent stem and vine aging, zinc can be supplemented through foliar fertilizer.
3. Pest and disease control
The main diseases to control in autumn tomatoes are fusarium wilt and viral disease. Among them, for viral disease, after tomato planting, once growth begins and flower buds are visible, pesticide application should begin, generally spraying once every half month, which can provide excellent preventive effect. Once a virus is found in the field, it can be controlled with the formula of 25 ml of Kangbingwei or Virus K + 15 tablets of medical Virusling + 30 g of Virus A or Kangdufeng + 2 g of natural brassin + 15 kg of water. The first application should be at a larger dose, and the second application can be at a normal spraying dose.
The above is an introduction to the key points of autumn tomato management. We hope it can help you. To learn more related knowledge, please follow us.