What is the main cause of grape "water tank" disease? How to prevent it?

Grapes? Water tank? Disease is one of the physiological diseases that fruit farmers often encounter in the process of grape planting. Why? Water tank? There are many reasons for the disease, such as unreasonable water and fertilizer management, high temperature and rainy weather and so on. These will all lead to grapes? Water tank? The occurrence of disease. Let me talk about grapes through the question of the subject. Water tank? Causes and preventive measures of the disease.

First, grapes? Water tank? Symptoms of disease

Water tank? The disease often occurs in the spike tip or the fruit of the accessory spike at the mature stage of grapes. When the illness is mild, according to the severity of the illness, only a few diseases are mild. But when the condition is serious, the whole ear may get sick. The red variety is abnormally colored and its fruit is dull, so it is nicknamed by fruit farmers. Fart red? ; The fruits of green and yellow varieties show water stains. In the affected part, the fruit has low sugar content, high acidity and high water content, the pulp is soft and inelastic, the peel and pulp are easy to separate, the pulp becomes a bag of water, and liquid juice will flow out when pinched by hand. Fruit stalks are often accompanied by round or oval brown spots. After the onset, the fruit is easy to fall off. Did you get the grapes? Water tank? After illness, he lost his economic value.

Second, the cause of grapes? Water tank? What is the cause of illness?

Grapes? Water tank? The root cause of the disease is a physiological disease that leads to the physiological dysfunction of vines due to malnutrition. From the planting experience, the main causes of diseases are as follows:

1, leaving too much fruit.

Improper fruit thinning at fruiting stage leads to excessive fruit. The vegetative growth of fruits and the reproductive growth of trees compete for nutrients, and diseases will be induced when fruits are in incomplete nutrient supply.

2. Improper management of fertilizer and water

Insufficient water and fertilizer: during the growth and development of grapes, the tree is weak due to lack of fertilizer and water; Excessive nitrogen fertilizer: when fertilization is unreasonable, especially when the amount of nitrogen fertilizer is too large and the amount of phosphorus and potassium fertilizer is insufficient, the balance between vegetative growth and reproductive growth is broken, and the vegetative growth of trees is excessive, and new shoots germinate too much, resulting in nutrient competition. 3. Unreasonable cultivation

Grape cultivation garden is low-lying, the soil is sticky, and when the planting density is too high, the humidity in the orchard is easy to be too high and the air permeability is poor, which is not conducive to the normal growth and development of grapes, and will also cause? Water tank? Gross.

4. The temperature and humidity control is unreasonable.

According to the planting experience, if the temperature is too high at night, after continuous high temperature and rainy weather, the water tank? The most common diseases are.

Anyway? Water tank? Diseases are easy to occur when the tree is weak, the load is too high, the fertilizer is insufficient and the effective leaf area is small.

Third, grapes? Water tank? Preventive and therapeutic measures of diseases

1, rational water and fertilizer management

The main cause of pitcher plant disease is lack of nutrients, so we should pay attention to comprehensive fertilization, especially the use of organic fertilizer. Driven by factors such as yield and economic benefits, we all pay special attention to the use of chemical fertilizers, often ignoring the application of organic fertilizers and medium and trace elements fertilizers that can greatly improve the quality of grapes.

Therefore, in fertilization, we should give priority to organic fertilizer, increase the application of phosphorus, potassium fertilizer and medium and trace element fertilizer, and properly control the application amount of nitrogen fertilizer. In addition, the benefits of potassium dihydrogen phosphate should be used reasonably. Spraying potassium dihydrogen phosphate before flowering, before fruit growth and after picking is of great help to the enhancement of tree vigor and the improvement of stress resistance.

For the management of soil moisture, intertillage weeding should be carried out in time, the soil should be kept dry and wet, and the soil should be watered reasonably to keep it loose, breathable and fertile, which is beneficial to the growth of roots and trees. As a fresh grape, the demand for fertilizer and water is the greatest during the fruit expansion period, so it is necessary to apply enough topdressing and water to make the fruit expand as much as possible.

2. Prune trees reasonably.

When coring the main shoot, it is necessary to leave as many leaves as possible and appropriately increase the leaves of the secondary shoot, which can increase the proportion of leaves and fruits and ensure sufficient supply of photosynthetic products when the ear grows.

3. Reasonable fruit thinning is the key.

Sparse the ear strictly and control the tree load. When thinning fruit, generally 1 fruit branch 1 ear, try not to leave 2 ears, which can reduce the load of grape plants, increase the proportion of leaves and fruits, and improve nutrient supply.

4. Pay attention to the management of fruit maturity.

Pay attention to the management of fruit maturity, and stop topdressing nitrogen fertilizer and watering when the harvest is near; In case of rainy weather, we should also pay attention to the drainage management of the orchard.

Anyway, for grapes? Water tank? The prevention and control of diseases, water and fertilizer management is the foundation of prevention and control, coupled with scientific and reasonable field management, when grapes go deep into the root system and trees grow healthily, water tanks? The probability of illness is naturally greatly reduced.