Causes of yellowing and death of peach trees

Peach chlorosis is the most common disease in peach planting process. It not only affects the growth of peach trees, but also has many effects on the yield of peach trees. So what are the causes of peach yellowing? Let's take a look at the detailed introduction.

1. Disease

Root disease is an important nutrient that causes peach yellowing. Peach trees suffer from root cancer, white silk disease, root rot, etc., which will hinder the absorption of nutrients and water by large trees, thus leading to tree weakness and serious plant death. In addition, canker disease of branches will lead to blocked nutrient transportation and partial yellowing. With winter frost injury, root and neck rot disease will occur from time to time, and plant weakness and yellowing symptoms will also occur.

2. Lack of fertilizer

Iron deficiency and nitrogen deficiency can cause chlorosis, among which nitrogen deficiency causes chlorosis is rare, but there are many reasons for iron deficiency. The planting density is large, the land area occupied by each tree is small, the roots are interspersed with each other, and the iron ions in the soil cannot meet the absorption of the roots. In addition, due to the influence of soil pH, iron ions in neutral and alkaline soil are fixed by hydroxide ions to form insoluble iron hydroxide, which will not be absorbed by roots, resulting in iron deficiency in plants.

3. Unreasonable pruning

After harvest, excessive pruning will lead to yellowing. Fruit growth will be inhibited by organic and inorganic nutrients before harvest. After the fruit harvest, the root system urgently needs to improve the organic nutrients of the leaves. At this time, if the pruning is too heavy, more branches and leaves will be lost, resulting in less nutrients synthesized by photosynthesis. Therefore, the root system does not have sufficient nutrient growth and cannot absorb more nutrients back to the ground parts, resulting in yellowing.

4. Chemical damage and fertilizer damage

Many fruit growers use improper pesticides when controlling pests and diseases, which will lead to phytotoxicity of plants, thus showing yellowing. Most phytotoxicity is related to herbicides, such as glyphosate and paraquat. In addition, excessive application of chemical fertilizer and less organic fertilizer will lead to soil hardening, serious loss of soil fertilizer and water, low organic matter content, affecting the decomposition and release of soil nutrients, and will also lead to plant yellowing. In addition, the wrong variety of fertilizer, the use of field crop fertilizer on fruit trees, will also cause yellowing and drying, such as the use of potassium chloride to peach trees, will cause chlorine ion poisoning in the roots.

The above is an introduction to the causes of peach yellowing and death. I hope it can help you. If you want to know more about it, please pay attention to us.