The latest prevention and control methods of apple virus disease

Apple is a common fruit in our daily life, and virus disease is a common disease in the process of planting. If it is not controlled in time, it will lead to a serious reduction in apple production and cause huge losses to fruit farmers. So how to prevent and cure apple virus disease? Let's get to know it.

1. Occurrence of harm

At present, the apple virus diseases found are mosaic disease, rust fruit disease, wrinkle fruit disease, small fruit disease, ring spot fruit disease, rough fruit disease, yellow leaf disease and so on. Once infected by the virus disease, it will endure the disease for a lifetime. The virus is mainly transmitted through grafting along with scions, rootstocks and seedlings. The more the number of grafting propagation, the faster its spread, and it is difficult to use chemicals to prevent and control it. After the fruit tree is infected by the virus, all parts of the plant will carry the virus, destroying and infecting the normal growth of the plant, resulting in the weakening of the tree, the decline of yield, the deterioration of varieties and other problems, and in serious cases will lead to the death of the whole plant.

2. Symptoms

There are many varieties of virus diseases, and the symptoms of various diseases are also different. mosaic disease mainly harms fruit trees and leaves, with irregular bright yellow spots at the initial stage, less at the initial stage, and then gradually expand and whiten, in addition, chlorotic spots will appear. Rust mainly harms the fruit and can be transmitted by grafting. The incubation period is 3-27 months. There are 5 radial brown corked rust spots in the direction of the fruit pedicle depression. The epidermal cells of the rust spot show cork, stop growing, and lead to fruit surface cracking and abnormal fruit. Seriously affect the fruit quality and commodity rate.

3. Prevention and control methods

Virus-free seedlings should be selected for propagation. At this time, the most fundamental measure to control apple virus disease is to pay attention to the selection of virus-free seedlings before planting. No matter the rootstock or scion is infected, virus-carrying branches and strains will be formed after grafting, and they will carry virus all their lives. First, to choose rootstocks to choose seedlings that are propagated by seeds, second, to choose scions that are virus-free, and third, to avoid collecting scions in orchards that are mixed with apples and pears or in orchards close to pear trees. Fourth, regularly check whether there are virus-carrying plants after planting, and remove and burn them in time after they are found.

The above is an introduction to the prevention and control of apple virus disease. I hope it can help you. If you want to know more about it, please follow us.