What is the cause of apple tree black leaf disease and how to treat it?

I'm happy to answer your question. It is a very common process that Apple can't afford our present life since we were children, and it is also a witness to our better and better life. It is rich in nutrition, crisp in taste and beautiful in appearance, and is deeply loved by people.

However, when planting apples, fruit farmers are also struggling, wondering if they can plant them well and have high yield. We must continue to study and sum up experience. Apple has a black leaf disease.

What caused it? How to prevent it?

I will answer them for you one by one.

Causes and control measures of black leaf disease;

1, weak tree, strengthen fertilizer and water management?

Apple black leaf disease is also directly related to fertilizer and water, so it is necessary to strengthen fertilizer and water management and enhance tree vigor. In the vigorous growth period of apple trees, we need a lot of nutrition, so we need to carry out

Combined application of organic fertilizer with nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer can increase the tree vigor and improve the disease resistance of apple trees. The specific dosage can be flexibly controlled according to the tree situation.

Generally, the soil should be watered according to the degree of drought in different periods, and each fertilization can be combined with one watering.

2. If the leaves are damaged, strengthen pest control?

Apple black is also related to pests and diseases, so timely measures should be taken to prevent and control pests and diseases and protect leaves. We can proceed.

Physical control and chemical control measures. We usually use chemical methods, which is a direct, rapid and more effective preventive and therapeutic measure. Generally, carbendazim, carbendazim and other fungicides can be used for prevention and control.

3. Poor air permeability, strengthening pruning management?

Pruning is also very important to control black leaf disease, especially in summer. In order to ensure good ventilation and light transmission of apple trees, we should

Timely clean up the lumen, weak branches, diseased branches, too dense branches, dead branches, too many side branches, etc. Weed and clear the orchard, bury or burn the cut branches and weeds.

In this way, the permeability and potential of apple trees are improved, sufficient sunshine is ensured, and the transmission route and infection source of black leaf disease are effectively eliminated.

The above is purely a personal opinion. If there is anything wrong, please advise. If you have a better understanding, planting and management methods, you can leave your valuable comments below and actively participate in the comments.