The cause and solution of yellowing and withering of blueberry leaves

Blueberry leaves are important organs for blueberry photosynthesis to synthesize organic compounds, and once a large number of yellowing occurs in the leaves, it will seriously affect the growth and development of blueberries. Blueberry yellow leaf phenomenon is more serious, light fruit setting rate is low, heavy tree weakness, branches and leaves die, or even dead plants, if you want to control blueberry yellow leaves, we must first understand its reasons, let's take a look at the detailed introduction.

First, the cause of blueberry yellow leaves

1. Causes of seedlings

The seedling itself is malnourished and the root system is poor, which will lead to poor root growth and etiolation in the planting process because the root is not broken and the root cover is too thick.

2. Improper soil

Blueberry has strict requirements for soil pH value, with the suitable growth soil pH 4.5-5.5, excessive acid and alkali are not conducive to the growth and development of blueberry, in addition, when the content of soil organic matter is not up to 5% or more, it is not conducive to the growth of blueberry.

3. Waterlogging damage

The low-lying land prone to stagnant water is very prone to waterlogging, which seriously affects the growth and development of blueberry roots and the ability to absorb nutrients. With a long time, the leaves do not have enough nutrients and water, yellowing will occur.

4. Underground insect pests

Pests such as grubs and mole crickets will harm blueberry roots, resulting in root damage and tree weakness. In addition, root rot and stem base will also lead to slow plant growth, no new branches, no heart leaves, even if the leaves are relatively small, yellowing occurs.

5. Fertilizer damage blueberry is an oligofertilizer crop, too much fertilizer application or improper fertilization position will cause fertilizer damage, which can easily lead to blueberry yellowing.

II. Solutions

1. New shoots of seedlings

To choose 2-3-year-old, well-developed roots, with 2-3 branches of strong seedlings, planting should first break open eyes, the roots are relatively dry, while soaking while transplanting.

2. Soil improvement.

Measure soil pH value before planting, apply sulfur powder or humic acid to adjust pH, apply organic bacterial fertilizer or forest peat to improve local soil, and increase soil organic matter.

3. Ridging cultivation

Drains can be built. It can effectively reduce the occurrence of waterlogging and avoid the yellowing of blueberries caused by waterlogging.

4. Pest control

In view of the root damage caused by various diseases and insect pests, resulting in leaf yellowing, humic acid foliar fertilizer + 30% carbendazim + carbendazim + low toxic insecticide + plant auxin can be used to irrigate the root, which has the triple effect of sterilization, insecticidal and root promotion.

5. Foliar fertilization

Foliar fertilizer has the characteristics of high absorption and utilization rate and fast recovery, so foliar spraying fungicide + trace element water-soluble fertilizer can be used to supplement trace elements in the early stage of etiolation, so that the yellowed leaves turn green gradually.

The above is the introduction of the causes and solutions of the yellowing and drying of blueberry leaves. I hope I can help you. If you want to know more about it, please follow us.