There are many reasons for tomato green fruit, the most important of which is uneven fertilization, excessive application of nitrogen fertilizer, and relatively low potassium fertilizer. After the tomato enters the peak period, it encounters bad weather such as low temperature and weak light, and it is easy to cause green fruit. Take the following measures to prevent it effectively.

Add organic fertilizer. Using formula fertilization technology, it is not advisable to use ammonia fertilizer to adjust the ratio of nitrogen, phosphorus and potassium in the soil to promote the absorption and utilization of potassium by plants. This is the most important measure to prevent tomato green skin.

Extend the time of seeing vegetables. When the fruit enters the color change period, the lower leaves and the nearby leaves of the color-changing ear are removed to increase the illumination.

Roots and roots enhance plant resistance. Apply foliar fertilizer with various elements (boron, calcium, magnesium, iron, zinc), which is suitable for amino acid type, promote black and green leaves, enhance photosynthesis, increase the absorption of boron and calcium, and reduce green skin and cracked fruit. phenomenon.

Strictly control the temperature. The daytime temperature should be controlled at 25 °C ~ 30 °C, the night temperature should be maintained at 14 °C ~ 16 °C, the temperature difference between day and night should not exceed 15 °C.

Balance the number of plants in the fruit. Can not take too much fruit or sit fruit is too low.

Control the concentration of flower hormones. The concentration of the flowering hormone should not be too high, and the fertilizer should be added in time after the flowering of the anther.

For the greenhouse where green fruit has already occurred, high potassium foliar fertilizer and chitin can be sprayed to relieve symptoms.

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