How about cucumber frosting? How to prevent it?

In the process of planting cucumber, I believe many people have encountered the situation that cucumber is not very bright and has a layer of white frost on its surface. This is because a physiological disease of cucumber has a great influence on the commercialization of cucumber, so we should pay attention to prevention.

Causes of cucumber frosting

1, the cultivated soil is too shallow, the root system is shallow, the absorption capacity is not strong, or the cultivated soil is sandy, the soil layer is too thin and the nutrients are insufficient;

2. At the end of cucumber growth, the plants are aged, and the root absorption efficiency is decreased;

3. The continuous cropping plots are seriously damaged by diseases and insect pests, and the plants are aging and malnourished;

4. The temperature and night temperature are too high. If the temperature is too high during the day and exceeds 35 degrees for a long time, plants will protect themselves and photosynthesis will be insufficient; If the temperature is too high at night, it will consume too much photosynthesis;

5. Continuous cloudy days, insufficient sunshine and insufficient photosynthesis.

Preventive measures of cucumber frosting

1. Reasonable selection of rootstock Cucumber black-seeded pumpkin is easy to freeze, but imported Japanese pumpkin or white-seeded pumpkin is not. At the same time, it is necessary to choose excellent scions, such as Del 3, and grasp the grafting quality so that the nutrients of the plants can be smoothly transported to the middle and late stages. End. Footsteps.

2. Deep ploughing land should be ploughed more than 30cm, and disinfectant should be sprayed to disinfect the soil, so as to improve the air permeability of the soil, promote the vigorous growth of the root system and improve the absorption capacity. .

3. Pay attention to spraying foliar fertilizer. Cucumber is a shallow-rooted crop, so more fertilizer should be applied less. If necessary, apply foliar fertilizer. Foliage fertilizer can be sprayed every 7- 10 days in the middle and late growth period to promote leaf photosynthesis. The foliar fertilizer can be 600 times as high as that of Wofengsu.

4. Temperature control

Ventilation and cooling measures should be taken in greenhouse in high temperature season to minimize the influence of high temperature on cucumber. In the low temperature season, pay attention to cleaning the greenhouse film to increase the light transmittance, which can also play a certain role in heat preservation.

5, late growth, we should pay special attention to the prevention and control of pests and diseases.

Generally speaking, cucumber frosting is mainly due to the decrease of plant nutrients and the increase of respiration, which leads to insufficient respiration consumption and inhibition, and frosty substances are produced on the epidermis. Frosted fruits usually lose their luster, which leads to a decrease in the market rate of cucumbers, so we need to be careful.