Causes and preventive measures of tomato soy sauce fruit

There are many vegetable farmers who report that there are a large number of soy sauce fruits in their tomatoes. The so-called soy sauce elder brother produces a large number of brown markings on the fruit surface, and the disease spots vary in size, which only occurs in the peel and does not affect the pulp. Soy sauce fruit will seriously affect the quality of the fruit, seriously reduce the income, need to be paid attention to, the following and Xiaobian to take a look at the reasons and preventive measures of tomato soy sauce fruit.

First, the reason of tomato soy sauce

1. Calcium deficiency

The main reason for the occurrence of soy sauce fruit in tomato is calcium deficiency, which will reduce the cell wall hardness of tomato pericarp, make the pericarp thinner and easily infected with bacteria. In order to pursue yield, many farmers apply a large amount of nitrogen and potassium fertilizer, so that the root system will resist the absorption of calcium, which can easily lead to insufficient absorption of calcium in tomatoes.

2. Improper management

Tomato in autumn and winter, if partial application of nitrogen fertilizer, low temperature and high humidity, poor ventilation and too high planting density, will also cause serious diseases in the greenhouse, while the disease of the fruit at the front end of the same greenhouse is more serious; the disease of large fruit type varieties is more serious than that of cherry tomatoes. In addition, abnormal fruit color change caused by improper management will also form soy sauce fruit.

3. Lycopene can not be produced normally.

In the tomato color conversion period, chlorophyll is decomposed and lycopene is formed, making the fruit look bright, and the best temperature for lycopene formation is 24 degrees. If the temperature is above 28 degrees or below 15 degrees, it will inhibit the formation of lycopene. Picking leaves will also inhibit lycopene production if the sun shines directly on the surface of the fruit. Excessive application of nitrogen fertilizer will also lead to the increase of plant chlorophyll, which will also inhibit the formation of lycopene, resulting in a large number of tea-brown disease spots on the fruit surface.

II. Preventive measures

1. Calcium supplement

When tomatoes enter the coloring period, it is necessary to replenish calcium in time and balance the ratio of calcium and potassium. Many farmers will have the problem of calcium deficiency because of excessive application of potash fertilizer. Therefore, in the coloring period, it is recommended to use calcium and magnesium foliar fertilizer, spray 2 times in a row, this can promote tomato coloring, so as to avoid soy sauce fruit production.

2. Ventilation management

In the process of tomato planting, we should first pay attention to temperature control, ventilation must be done well, if it is poor ventilation between small banks. Then through the way of thinning leaves, to ensure light and air permeability, so that the quality of tomatoes can be guaranteed.

3. Fertilization

The soil EC value is too high for normal soy sauce fruit, which is also a problem of fertilization. at this time, it is necessary to control the amount of fertilizer application, apply less fertilizer, and irrigate 2-3 times of empty water in the growing season, which can alleviate the situation of soy sauce fruit.

The above is the introduction of tomato soy sauce fruit causes and preventive measures, hope to help you, want to know more related knowledge, please follow us.