How did blueberry leaves get like this? 30

Causes and solutions to yellowing of blueberry leaves.

1. The soil is unsuitable.

The yellowing of the leaves of blueberries may be caused by the unsuitable growth soil, so that the blueberries cannot grow normally, at this time, it is necessary to immediately replace the blueberries with loose and well-drained acidic soil, pine needles and Bika granular fertilizer can be added to the soil, and potassium permanganate and other substances can also be sprayed in an appropriate amount, which is very beneficial to the growth of plants.

2. Improper water and fertilizer.

If the blueberry is overwatered or fertilized, its roots rot in the soil and cannot absorb water and nutrients, resulting in yellow blueberry leaves.

3. The light is too strong.

Although blueberries like to grow in the sun, they can usually be exposed to the sun all day, but in the summer it is easy to burn the leaves, so it is necessary to dispose of the burned leaves and transfer the blueberries to a cool environment to cultivate, and need to be sprayed with appropriate watering to reduce the humidity of the air.

4. Pest and disease hazards.

If it is infested by pests and diseases, the pests and diseases will absorb the sap and nutrients of the plant, which will make the leaves of the blueberry yellow, wilt, and finally cause death.

For deficiencies or viruses and bacterial diseases, use fungicides first, and then fight this.

Potassium fertilizer is insufficient, resulting in dry and scorched leaf edges, apply some potassium sulfate fertilizer, or buy some high potassium compound fertilizer, depending on your tree variety is Legsi, it is recommended to change a larger pot, at least 30L capacity of the pot, otherwise the three-year-old tree you this pot will not be enough, the root system can not be stretched, just planted down it is recommended to prune the branches, leave the main stem branches, give it to use potassium dihydrogen phosphate fertilizer to nourish the roots, and see that the branches have canker disease, contact to deal with it.

This is caused by pests and diseases, first of all, you must find out how to get rid of this pest? Well, these drugs are definitely needed. For example, potassium permanganate.

But the amount of this medicine you use must be pinched to the top of the percent. 99% of the water 1% of the drug can be removed without too much. There are too many, and the difference is not to cure the symptoms, so should you use too much?

The redness of blueberry leaves depends on what season it is, and it is normal for the leaves to be red in winter, because the leaves are going to fall, and the redness of the leaves in summer is too high pH, and if it is not improved, it will die.

Blueberry is a shrub, each bush should have 25-30 fruiting branches, flowering and fruiting in the second year, but the yield is smaller, there is an appropriate yield in the third year, the fifth year enters the harvest period, its life span is 50 years, the average yield per plant is 3-6 kg, the average single fruit weight is 2 grams, generally about 300 plants per mu, and the average yield is 1500-2000 kg.

Blueberries are adaptable, prefer acidic soils, and generally require a soil pH value; The soil should be soft, the organic matter content is generally 8%-12%, it likes moisture, and the drought resistance is poor. Its main varieties are high-bush blueberry, with a plant height of about 2 meters, which can resist the low temperature of -25--30, and generally has a fixed value of 330 plants per mu; Half-height bush blueberry, plant height rice, can resist the low temperature of -35--38, generally planted 330 plants per mu; Dwarf bush blueberry, plant height rice, can resist low temperature above -40, generally 500-800 plants per mu, suitable for cold zone cultivation. Blueberry seedling propagation can be propagated by root tiller, root strip propagation, cuttings propagation and tissue culture propagation.

Blueberry diseases are caused by fungal diseases, bacterial diseases and nematodes. China is a newly introduced cultivation area, and the occurrence of pests and diseases is less.

Blueberry fruit is berry type, storability is strong, under indoor L8-26 room temperature conditions, the use of small packaging (small food box) fresh fruit can be stored for 2 weeks without changing the original flavor, such as low temperature storage its shelf life will be longer, modified atmosphere storage can be up to about 3 months.

There are several reasons why blueberry leaves may turn yellow:

1.Lack of nutrients: Blueberry trees need the right soil and nutrients, and if the soil is poor or lacks certain key nutrients, the leaves of the blueberry tree will turn yellow. At this point, it is necessary to fertilize the blueberry tree or improve the soil conditions.

2.Overwatering or lack of water: Blueberry trees have a high water requirement, but if they are overwatered or dehydrated, they can also cause the leaves to turn yellow. Water properly according to the local climate and soil conditions, and keep the soil moist but not too wet.

3.Pest and disease infections: Blueberry trees are susceptible to some viruses, fungi and insect pests, such as blueberry mosaic disease, blueberry red spiders, blueberry leaf mites, etc., which can damage the leaves and root system of blueberry trees, resulting in yellowing of leaves.

It should be detected in time and corresponding prevention and control measures should be taken.

4.Climate change: Blueberry trees are sensitive to changes in temperature and humidity, and sudden changes in climate, such as high or low temperatures, high or low humidity, can also cause blueberry leaves to turn yellow.

If the leaves of the blueberry tree turn yellow, it is necessary to take corresponding measures for specific reasons, such as fertilization, adjusting the amount of watering, and controlling pests and diseases, etc., to ensure the healthy growth of the blueberry tree.

More water: When raising blueberries, if you water too much or there is water in the soil, the root system will rot due to lack of oxygen, and the leaves will turn yellow.

Fertilizer damage: If too much fertilizer is applied to it, or the concentration of fertilizer is high, the root system of the plant will also be burned, resulting in yellow leaves.

Lack of light: It needs to see light during its growth period, and if it is exposed to light for a long time, its leaves will turn yellow and yellow.

Causes of redness of blueberry leaves: improper fertilization, too low temperature, soil discomfort, disease.

1. Improper fertilization

The redness of the leaves of blueberries may be due to the improper provision of nutrients to the plant during maintenance, which prevents the plant from growing properly. Therefore, in the later maintenance of blueberries, it is necessary to provide reasonable nutrients for the plant, generally according to the growth of the plant to provide nutrients, in the plant growth period to use nitrogen fertilizer, in the plant flowering and fruit period need to use nitrogen, phosphorus and potassium compound fertilizer.

2. The temperature is too low

The redness of the leaves of blueberries may also be due to the low temperature of the environment in which the plants grow, resulting in poor plant growth, so it is necessary to provide suitable light for the plants when maintaining the blueberries, so that the plants can photosynthesize normally and maintain the green leaves. During winter maintenance, it is necessary to take appropriate measures to keep the plants warm.

3. The soil is unsuitable

Reddening of the leaves of blueberries may also be alkalizing of the soil in which blueberries are grown. Because blueberries are suitable for growing in acidic soil, soil alkalinization will lead to poor growth of plants and red leaves, so in the later maintenance of blueberries, it is necessary to water an appropriate amount of acidic solution to the plants to adjust the acidity and alkalinity of the soil, so that the plants can grow healthily.

4. Diseases

There may be some pests and diseases in the process of blueberry growth, which may cause poor plant growth, so it is also necessary to spray the plant regularly with fungicide or insecticide when maintaining blueberries to eliminate the bacteria and pests present on the plant. At the same time, it is also necessary to prune the plants properly, cut the branches that grow too densely on the plants, and improve the ventilation between the plants.

Blueberry growing environment

Blueberries can be grown at an optimum temperature of 13-30 and can tolerate temperatures of up to 40-50, above which can lead to poor root absorption of water and poor development. Climatic conditions vary depending on the type of blueberry range.

The growing season is short, the winter is cold and the summer is cool, the annual average temperature is 5-12, the average temperature from December to January of the following year is below 0, and the extreme minimum temperature can reach -40.

The distribution area of rabbit eye blueberry and southern highbush blueberry has a long growth period, warm winter and high summer temperature, the annual average temperature is 18-22, the annual growth period is as long as 256-285 days, the monthly average temperature in January is close to 10 or above 10, and the absolute minimum temperature is above -16.

The climatic conditions of the distribution area of blueberry in the northern highbush are between the above two distribution areas, with an average annual temperature of 10-120 and a growing period of 150-250 days. In winter, the average monthly temperature can reach below 0, and the absolute minimum temperature is often -20, but not less than -30.