There are several types of grape yellow leaf disease and treatment methods

1. There are several

It is infected with only one type of yellow leaf disease, which is also a relatively common disease. In the early stage of the disease, the young leaves will turn yellow. As the disease progresses, most of the leaves will turn yellow or yellow-white in the later stage. In severe cases, the growth of the entire plant will be affected. The fruit will also stop growing and begin to fall off.

2. Causes

There are three main reasons for infection with this disease. One reason is the variety problem. Some varieties have poor disease resistance and are easily infected by diseases. For example, when the disease occurs in Kyoho grapes, the symptoms are more serious. The second reason is climate. There is more rain in autumn, which can easily cause white rot or downy mildew. At this time, the tree consumes too much nutrients and will shed its leaves early. During the winter, the tree becomes weak and physiological imbalance occurs, making it susceptible to this disease when it sprouts and leaves grow in spring. Third, because the soil is too alkaline, the iron contained in it will become insoluble iron and cannot be absorbed, so it will gradually turn yellow.

3. Treatment Methods

Infection with this disease will seriously affect the later growth and results. When it is discovered, it is necessary to use medication for treatment as soon as possible. You can spray ferrous sulfate solution, once every 7-10 days, and it will be effective after two or three times. In addition, we must also pay attention to prevention. Usually, we should pay attention to adjusting the acidity of the soil to maintain normal pH. The garden should be cleaned every winter, and diseased leaves and dead branches should be removed to avoid infection.