Causes and solutions of citrus yellowing

Yellowing is a common problem in citrus cultivation, which makes many fruit growers have a headache. It is mainly manifested as yellowing and shedding of leaves, poor disease resistance of plants, low fruit yield and quality, which seriously affect the economic income of fruit farmers. So what is the cause of yellowing? What should we do about it? Come to the pro-agriculture network to see the detailed introduction.

1. Lack of elements

Orange trees need a variety of trace elements for growth, and yellowing occurs when certain elements are deficient. For example, when nitrogen is deficient, the leaves of the plant begin to turn yellow and become thinner; when phosphorus is deficient, the new leaves grow densely and the old leaves turn bronze; when magnesium is deficient, the old leaves begin to yellowing and triangular maculae appear; when iron deficiency occurs, the new leaves begin to yellowing. When calcium deficiency, leaf veins begin to yellowing, and so on, the lack of certain elements in plants will cause yellowing.

Solution: fertilize frequently to ensure the nutrition needed for plant growth, pay attention to balanced matching, pay attention to the supply of various elements, not single fertilization, it is recommended to apply organic fertilizer or multi-component compound fertilizer.

2. Soil and root causes.

Problems with soil and roots will also cause yellowing of citrus. When the soil fertility is poor or hardened, the roots can not grow normally or be damaged, unable to absorb nutrients and water, which will lead to the phenomenon of semi-green and semi-yellow leaves. In serious cases, it causes leaves to fall off. In addition, root nematodes can also cause root nodulation, unable to grow and absorb normally, and this will also occur.

Control methods: select land with rich and loose soil to plant, strengthen management during planting, fertilize regularly, maintain soil fertility, loosen soil and weed regularly, increase soil permeability, and irrigate root nematodes to eliminate diseases.

3. Diseases and insect pests

There are many diseases and insect pests in citrus, and it is recorded that there are more than 400 kinds of diseases and insect pests. Some diseases and insect pests can also cause citrus leaf yellowing, such as Huanglong disease, mites, aphids and longicorn beetle planthoppers, all of which can cause yellowing.

Prevention and control methods: for these diseases and insect pests can not be discussed together, specific methods should be specific analysis, there are different methods for different diseases and insect pests, so it is necessary to understand its harmful characteristics in order to prescribe the right medicine.

The above are the causes and solutions of citrus yellowing brought by pro-agricultural network, so far as the problem of citrus yellowing is introduced, and the editor also brings solutions to various reasons. I hope it can help you, more agricultural knowledge, please pay attention to pro-agricultural network.