The causes and control methods of the latest watermelon

Watermelon, also known as watermelon, is also known as high-temperature fermented melon in summer. it is a phenomenon that the texture of melon flesh becomes softer and its color darkens. When it is serious, the pulp of watermelon has sour taste, loses its commodity value, and causes huge economic losses to farmers. So what are the reasons for the collapse of watermelon? How to prevent and cure it? Let's take a look.

First, the reason for the collapse of watermelon.

1. Variety. The phenomenon of watermelon pulp inversion has something to do with the varieties. Generally, the varieties with loose texture are prone to the phenomenon of pulp inversion, whereas the varieties with hard pulp texture are less likely to have them.

2. Repeated cropping. During the growth of watermelon, its roots secrete a kind of salicylic acid, which is a harmful substance. If it is planted repeatedly for many years, it will lead to a very high content of salicylic acid in the soil, which makes the soil acidified. During the later growth of watermelon, the change is caused by the influence of this substance, and there is a greater chance of inverted flesh.

3. High temperature. High temperature is also one of the most common causes of watermelon filling. When watermelon grows at a high temperature above 35 degrees for a long time, its leaf photosynthesis will be inhibited, thus destroying the normal function of leaves and affecting the normal growth of plants.

4. Lack of water or waterlogging. If drought and lack of water or too much watering and normal waterlogging are applied during the expansion period of watermelon, the absorption capacity of the root system will be affected, and the dryness and humidity of the soil will affect the nutrient synthesis and cause the reverse flow of nutrients and water to form the pulp.

5. Disease. Diseases can also lead to watermelon pulp toppling, such as serious virus disease and anthrax, or green spot disease will also cause watermelon pulp softening, produce peculiar smell, appear inverted phenomenon.

6. Harvesting is too late. If the watermelon is not harvested in time after it is ripe, it is easy to cause the watermelon to be overripe and collapse.

II. Prevention and control methods

1. Variety selection. Watermelons in summer and autumn should choose some varieties with strong disease resistance, high temperature tolerance, strong growth and not easy to premature senescence.

2. Temperature and humidity management. When the summer temperature is high, the fruit should be covered with leaves to avoid sunlight. If the leaves are not enough, they can be covered with weeds or waste paper to reduce the fundamental adverse effects of weather diseases. If it is planted in the greenhouse, the front and rear film and the side film should be opened in time to increase ventilation to achieve the effect of cooling and humidity reduction, and an external sunshade film can be set up outside the greenhouse.

3. Pruning. Proper pruning, if necessary, 1-2 lateral branches to ensure that the plant has a certain functional leaves, maintain a high photosynthetic efficiency, promote the normal development of fruit, do not prune under drought conditions.

4. Fertilizer and water management and disease control. Watermelon after sitting greatly increased water demand, ah yo moderate topdressing and increase watering, spraying trace element foliar fertilizer to promote strong plant growth, improve stress resistance and prevent premature senility.

The above is the introduction of the reasons and prevention and control methods of watermelon, hope to help you, want to know more related knowledge, please pay attention to us.