In winter, the temperature is low, cucumbers in the greenhouses are prone to melon topping, and their symptoms are realized: plant growth stagnates, leading to tightening, the internodes near the growth point are very short, the parts close to the growing point, the dense leaflets, female flowers at the leafhoppers. Or the small melon button, resulting in capping, the main vine no longer stretches, has a great impact on the later production.
Cucumber melon topping is a physiological disease. The causes of this phenomenon are: root injury, low temperature and low radiation, fertilizer damage, drug injury, soil drought, and insufficient fertilizer supply. Winter sorghum cucumber, in the case of fine management, is mainly due to the low temperature and even cloudy days, especially the old shed for many years, poor insulation, and low temperature in the deep winter season (lowest continuous temperature down to below 10 °C) As a result, the root system of cucumber is poorly developed, the nighttime temperature is too low, and the roots deliver less nutrients to the new parts of the plant. The vegetative growth of the plants is inhibited and the vegetative growth is weakened, resulting in the emergence of dystrophic melons.
Melon topping has a great influence on cucumber yield. If you do not take timely measures, it will cause great losses. The specific operations are as follows:
1, remove top melon top flowers. First, remove all the flowers and young cucumbers on the top of the cucumber, then spray the algae on the leaves to restore the growth of the faucet. Note that when the whole plant stays in the melon, the number of melons must be adjusted according to the growing situation of the cucumber. The temperature is low, the plants grow slowly, and a melon can be left, so as to prevent the melon from falling too much.
2, pay replenishing fertilizer. In order to prevent the shed from being oversized, it is necessary to adopt a water-saving method when watering. When the water reaches the south of the river, immediately change the next line to prevent flooding. Every time when watering, it is necessary to cooperate with rooting fertilizers to promote root development and plant rejuvenation.
3, increase the temperature. After irrigating with water, it should be carried out in accordance with the principle of warming and dehumidification. Generally, when the temperature in the shed reaches 32°C or above, the air is released, and when the temperature drops to 25°C, the shed is heated again and the cycle proceeds. In addition, it can be used in combination with hanging reflective film to increase the thickness of straw curtains, and timely cleaning of greenhouse films to ensure daytime temperatures, increase nighttime temperatures, and restore cucumbers as soon as possible.
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