How to prevent tomato from cracking in the middle and later stage of tomato

Tomato in greenhouse in summer and autumn often crack during the color conversion period, which affects the appearance of tomato, so how to prevent fruit cracking in the middle and later stage of tomato?

Tomato fruit cracking

One, three kinds of dehiscent fruit:

1. Radiate dehiscence. With the pedicel as the center, it extended to the shoulder of the fruit, showing a radial deep crack, starting from the green ripening stage of tomato, and formed fine cracking stripes near the pedicel. 2-3 days before color change, the crack was obvious.

2. Annular dehiscent fruit. With the pedicel as the center, it was annular and lobed, which mostly appeared when the tomato was ripe.

3. Striped dehiscence. Fruit apex with flower marks, irregularly dehiscent stripes.

Second, the reasons:

The main results are as follows: 1. mainly in the late stage of tomato development or color conversion period, in the case of strong light, high temperature and drought, rainstorm and so on, tomato peel growth and pulp tissue expansion were out of sync, tomato swelling pressure increased and fruit cracking appeared. Especially in case of showers or heavy rain, tomato root system appears physiological dysfunction, which affects the absorption and transport of water and nutrients, and is easy to produce fruit cracking.

2. the topping of the plant is too heavy, and the tomato is suddenly watered after exposure to the sun, which is easy to produce fruit cracking.

3. Tomato fruit cracking is also related to varieties, the fruit with thin skin is easy to crack, and the fruit with thick skin is not easy to crack.

4. Lack of trace elements such as calcium and boron will lead to cork-like cracking on tomato fruit surface.

Third, prevent tomato fruit from cracking

1. Tomato varieties with strong crack resistance should be selected.

2. Field management should be strengthened. Timely and appropriate watering to prevent the soil from being too dry, too wet, or suddenly dry and wet. After rain, clear ditches, drain stains, and reduce dampness. Increase the application of organic fertilizer and high-quality biological fertilizer to improve soil structure and provide good environmental conditions for tomato root growth. Often spray calcium, boron and other fertilizers. Pruning and branching should be moderate, keep tomato plants with luxuriant leaves, strengthen excess water transpiration, and avoid fruit cracking caused by concentrated supply of nutrients. When the plant growth regulator is used correctly, the concentration should not be too high when spraying with hormone, and the concentration should be determined reasonably according to the variety and temperature of tomato. Foliar fertilizers such as calcium chloride and zinc sulfate were sprayed timely during the expansion period of tomato to improve nutrition and enhance the crack resistance of tomato. Spraying 27% high-fat membrane emulsion 100 times also has an effect.