How to prevent tomato navel rot? What is the prevention method?

Tomatoes are a commonly eaten vegetable in daily life. There are many growers and the economic benefits are also very good. What should I do if umbilical rot occurs during tomato planting? How to prevent tomato navel rot?

    1. Reason

    Symptoms The disease mainly occurs during the swelling period of the eggplant fruit. The color of the lower navel of the fruit turns brown, some withered, and some rot, which has a great impact on yield and quality. Umbilical rot is caused by physiological calcium deficiency in tomatoes. In recent years, many vegetable farmers have generally ignored organic fertilizers to increase production by applying chemical fertilizers in fertilization. However, in chemical fertilizer applications, there have been problems of partial application of nitrogen fertilizers, lack of phosphorus, potassium, and calcium fertilizers, which are all caused by tomato umbilical rot. important reason.

    2. Prevention measures

    Tomatoes have a high yield, a large amount of fertilizer, and a long harvest period. They need to be harvested and supplemented with nutrients to meet the needs of continuous flowering and fruiting. The demand for potassium, calcium, and magnesium during the whole growth period is relatively large, especially in the fruit expansion period. If calcium is deficient at this time, umbilical rot is prone to occur. The main nutrients absorbed by tomatoes are potassium, calcium, nitrogen, phosphorus, and magnesium in order.

Fertilization should be done with more organic fertilizers, and chemical fertilizers should control nitrogen and increase phosphorus. Phosphate fertilizer should be calcium-magnesium phosphate fertilizer, base fertilizer should be a combination of organic fertilizer and inorganic fertilizer. In the case of not applying organic fertilizer, select high-phosphorus compound fertilizer as base fertilizer.

If you choose elemental nitrogen fertilizer plus calcium, potassium sulfate or potassium chloride can be used for potassium fertilizer. In acid soil, calcium-magnesium phosphate fertilizer is better for phosphate fertilizer.

The top dressing in the growth period mainly uses nitrogen and potassium fertilizers, combined with fertilizer and water. Apply strong fruit fertilizer during the fruit swelling period, and apply strong fruit fertilizer topdressing 3-4 times during the second and third ear fruit swelling periods. After entering the fruit-bearing period, the root system becomes weak and the ability to absorb fertilizers decreases. You can spray fertilizer outside the roots, spraying aqueous solutions such as potassium dihydrogen phosphate, calcium nitrate, borax and urea, which is conducive to strong seedlings and fruit in the later stage and reduces umbilical rot. The occurrence of disease.