"Memory fruit" apple appears on circular plaque is what disease? How did it happen? With what medicine can you cure?

Apple mosaic face disease is a common disease during the growth of apple trees. before coloring, there is no obvious difference between diseased fruit and healthy fruit, only after bagging fruit coloring, there are many nearly round yellow-white or red patches on the fruit surface, showing a flower face shape. seriously affect the production efficiency of the apple, then how does the apple mosaic disease occur? What kind of medicine can be cured?

Symptoms:

When the diseased fruit is stained seriously, the fruit surface is uneven and bumpy, and the quality becomes worse, which directly affects the appearance of the fruit, resulting in its loss or serious reduction of commodity value, and greatly reduces the income of fruit growers. However, the disease does not affect the normal growth of leaves, and it is not easy to find fruit bags without fruit.

Cause of the disease:

1. Improper management of soil and fertilizer:

Most fruit growers do not attach importance to soil fertilizer management in apple orchards, and there are few soil improvement measures such as deep ploughing and soil improvement. in the process of fertilization, there is no formula fertilization, often using a single chemical fertilizer, no microbial fertilizer, silicon, calcium, potassium, magnesium fertilizer and so on. resulting in the lack of medium and trace elements in the soil. Some fruit growers even mistakenly applied fresh cow manure, raw fertilizer and organic fertilizer, and some mistakenly applied chlorine-containing fertilizer, which eventually led to acidification and hardening of orchard soil, poor absorption and utilization of nutrients, imbalance of various nutrient elements, and serious weakness of trees. virus disease occurred seriously.

2. The tree is weak.

Hanging too much fruit, consuming too much nutrients, and did not replenish nutrients for the tree in time, resulting in extreme lack of tree nutrition, tree potential decline, tree disease resistance, stress resistance decreased, easy to cause the occurrence of flowers and fruits, and increased year by year.

Prevention and control methods:

The main results are as follows: 1. Seize the key opportunity of virus replication and use drugs to passivate virus activity and inhibit virus pathogen replication.

2. Do a good job of nutritional rejuvenation of the tree, make use of its immune ability to passivate virus activity and inhibit replication, and finally make virus patients release with the metabolism of dead cells. In particular, the application of some substances to help the plant enhance immunity, such as zinc, polysaccharides, peptides, brassinolide and so on.

What medicine should be used to cure it?

Spray: before sprouting, the red period of flower dew, the 2 / 3 of Xiehua, and the critical period of forming flower bud and leaf bud in the coming year (July and August), the diseased plant and the fruit trees around the diseased plant were infused or sprayed with "Orek-fruit tree virus" 40g and 30 jin of water.

Root irrigation: in view of the weak tree potential and serious disease, the tree was irrigated 1-2 times with Qingku Rike 300 times + Vofengsu 600 times + Tilwang 500 times to improve the tree immunity and nutrition rejuvenation.