Many farmers often encounter poor color change when planting tomatoes, which is a common phenomenon in tomato growth. Poor color change of tomatoes is more common in greenhouse cultivation. If there are too many such phenomena, it will affect the economic benefits of farmers. So, what are the main phenomena of poor tomato color change? What is the cause? How to prevent it?

First, the main phenomenon of poor tomato color change

1, green shoulder fruit

Green shoulder fruit, also known as green fruit, means that when the tomato matures and turns, the tomato shoulder still has green patches, but it does not turn red.

2, brown fruit

Brown fruit refers to the appearance of tea brown on the red fruit surface when the tomato is ripening, or the gloss of the yellow-brown tomato is worse.

Second, the cause of poor tomato color change

1, green back fruit

When the planter is biased with nitrogen fertilizer in the early stage and lacks potassium fertilizer and boron fertilizer, it is prone to green back fruit; when the soil is dry, or the temperature is high, when the light is directly exposed to the tomato fruit, it is easy to cause green back fruit.

2, brown fruit

When the growers are biased with nitrogen fertilizer, the brown fruit is easily induced when the temperature is low, which causes poor color change and affects the tomato phase.

Third, the preventive measures for poor tomato color change

1. Rational fertilization

The growers should reasonably apply potassium fertilizer, nitrogen fertilizer, phosphate fertilizer, and already boron fertilizer, and should not apply nitrogen fertilizer. It is recommended that the growers apply the base fertilizer according to the mouthwash, and recommend 0.5-1 kg of boron fertilizer as the base fertilizer per mu. In the result period, pay attention to the amount of nitrogen fertilizer, apply potassium sulfate 1-2 times, or spray 0.2%-0.5% on the foliar surface. Potassium dihydrogen phosphate solution.

2, reasonable watering

Tomatoes should be properly watered. According to the growth needs of tomatoes in different periods and the characteristics of the times, water should be watered at the right time to avoid soil drought and keep the soil dry.

3. Strengthen plant adjustment

It is reasonable to plant densely planted tomato plants. It is recommended to use single dry pruning to increase ventilation and light transmission, and to avoid direct sunlight on the fruit surface, which can effectively reduce the appearance of green back fruit and brown fruit.

4, adjust the temperature and lighting conditions

After the tomato enters the fruit-expanding period, it is recommended that the growers adopt heat management measures such as heat preservation, light enhancement and air release according to weather conditions. In temperature management, it is recommended to control at 25-28 degrees during the day and 15 degrees at night.

The above is the phenomenon, cause and preventive measures of poor tomato color change. Poor tomato color change will affect the commercialization of tomato and reduce the income of farmers. Therefore, farmers must pay attention to prevention during the planting process, and try to reduce the phenomenon of poor tomato color change.

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