Causes and control methods of high seedling of cucumber

In the process of cucumber seedling raising, after the seedlings are unearthed, attention should be paid to forging seedlings, and the seedbed should be kept moist, so it is not advisable to water them too much. At the same time, it is necessary to strengthen the ventilation conditions to prevent the seedlings from growing white and forming a high-legged temple.

So how to prevent high seedling of cucumber? Let's take a look at Bian Xiao.

1, symptoms appear.

High seedlings have large leaves, thin leaves, light colors, thin and long stems and large spacing between stems. When the root is dug out, it will be found that the root is short and small, and the dry matter accumulation is less.

Because the root system is weak, the ability to absorb fertilizer and water is weak, the stems and leaves are tender, and the surface cuticle is underdeveloped. Once the air humidity decreases, transpiration will increase, and then the leaves will wither.

High-footed seedlings have poor stress resistance and are prone to freezing and disease. Because of malnutrition, tall seedlings have slow flower bud formation, less flowers and late flowers, often forming deformed fruits, easy to drop flowers and low yield.

2. Causes of occurrence

The main reasons for the formation of high seedlings are too low temperature at night, small temperature difference between day and night, insufficient illumination, poor ventilation, too much water, too much nitrogen fertilizer and too little phosphorus and potassium fertilizer.

When the seedlings were first unearthed, they were not ventilated in time because of poor ventilation conditions. When they touch the mulch, they will grow in vain. At this time, the seedlings are sensitive to temperature, and it is easy to cause hypocotyl elongation under high temperature conditions.

Then before planting, the outside temperature gradually rises, the weather gets warmer and the seedlings grow faster. At this time, the plants crowded with each other, shielding each other from light and shade, resulting in the height of seedlings.

3, prevention and control methods

First of all, the proportion of nutrient soil in seedbed construction should be reasonable, which can be mixed with organic fertilizer and pastoral soil. Organic fertilizer should be fully decomposed, and vegetables should be planted in pastoral soil to avoid infection with pests and diseases, and screening should be carried out at the same time.

After the seedlings are unearthed, the humidity and night temperature of the seedbed should be kept between 15-20 degrees in the first half of the night and 10- 15 degrees in the second half of the night. It should not be lower than 5 degrees in the morning, and keep a certain temperature difference between day and night.

When the seedlings grow in vain, 50% chlormequat chloride can be sprayed 2500-3000 times. After spraying 10, the seedlings will grow slowly, the leaves will turn dark green and the stems will become stout.

The above is the introduction of the causes and control methods of cucumber high seedling. I hope I can help you. If you want to know more, please pay attention to us.