What is the disease of the yellow dry edge of the pear tree? What is the cause of yellowing of pear

Pears are rich in vitamins and fiber, which have the effects of moistening the lungs and relieving cough and facilitating digestion. And it tastes crispy and delicious, and it also has the effect of relieving fatigue, so it is very popular with everyone. So how can you make a pear tree produce better quality fruits?

The most important step is to do a good job of field management such as pest control during the growth period, such as pear leaves turning yellow and drying up.

This phenomenon is mainly caused by the following reasons;

First, the soil problem. Pear orchards should be built on plots with fertile soil and good drainage. Because if the drainage is not timely, the soil is compacted, which will hinder the respiration of the roots of the pear tree, affect the normal growth of the roots, and weaken the ability of the roots to absorb nutrients, resulting in insufficient plant nutrients, yellow leaves, and severe leaf drying, until the death of the tree.

Second, iron deficiency yellow leaves. Iron is one of the indispensable trace elements for the formation of chlorophyll in leaves. When iron is deficient, the leaves gradually turn yellow, the leaf veins are still green, and after a long time, the whole leaf is white, and then dry up and fall leaves.

Once this happens, we need to give it iron supplementation in time. The roots can be topdressed with an appropriate amount of iron fertilizers such as ferrous sulfate. At the same time, ferrous sulfate can also be made into a solution for foliar spraying.

Spray two or three times at an interval of 5 days.

Third, improper use of fertilizer, resulting in yellow leaves. 1. When applying farmhouse organic fertilizer, it must be thoroughly rotted to prevent pathogenic bacteria from causing damage to the roots. 2. When using high-concentration fertilizer, try to stay away from the roots and water them in time, so as to help the roots of the pear tree absorb nutrients from the soil as soon as possible.

First, it turns yellow because of flooding, because of too much watering or too much rain, the drainage and irrigation are not smooth, causing poor root respiration.

The second is because of the dry weather, which is characterized by the gradual development of old leaves to new leaves in the yellowing parts, which is generally caused by dry weather and no moisture on the surface of the land.

The third is because the amount of fertilizer is too much, or the concentration is too large, so that the old will gradually fall off, and the heart will become very thick and shiny.

The first time may be caused by a lack of fertilizer. One is because of insufficient fertilization, the soil is slabbed, and the other is because of the lack of light, so it is necessary to strengthen light.

The fifth is because the water is too alkaline. It is easy to make the leaves yellow.

Summary. Hello, very happy for your question, pear tree has such a situation, there are many possibilities, first of all, the soil problem, if there is too much water in the soil, or the drainage is not timely, it will cause soil agglomeration, which will affect the breathing of the pear tree, affect the normal growth of the root system, and weaken the ability of the root to absorb nutrients, so that the lack of plant nutrients will cause the leaf yellow dry edge, the second possibility is iron deficiency yellow leaves, when iron is deficient, the leaves gradually turn yellow, the leaf veins are still green, for a long time, the whole leaf is white, And then dry, fallen leaves, the third may be caused by too much fertilization, I hope mine can help you.

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Hello, very happy for your question, pear tree has such a situation, there are many possibilities, first of all, the soil problem, if there is too much water in the soil, or the drainage is not timely, it will cause soil agglomeration, which will affect the breathing of the pear tree, affect the normal growth of the root system, and weaken the ability of the root to absorb nutrients, so that the lack of plant nutrients will cause the leaf yellow dry edge, the second possibility is iron deficiency yellow leaves, when iron is deficient, the leaves gradually turn yellow, the leaf veins are still green, for a long time, the whole leaf is white, And then dry, fallen leaves, the third may be caused by too much fertilization, I hope mine can help you.

1. Insufficient light.

When planting pear trees, if the pear trees show yellow leaves before autumn, it is most likely due to a lack of light. If the pear tree lacks light, the leaves cannot photosynthesize, resulting in a decrease in the chlorophyll content of the leaves, and the gradual appearance of yellow leaves. Therefore, when we plant pear trees, we must pay attention to maintaining sufficient light.

It is necessary to prune too long and dense branches in time to improve the permeability of the inner chamber of the pear tree and maintain good light transmission, so that the inner branches of the pear tree can also receive sufficient light and reduce the phenomenon of yellow leaves.

2. The soil is too alkaline.

If the soil used to plant pear trees is too alkaline, it is also very easy to cause yellow leaf disease in pear trees. In many cases, the soil pH value of the plot where pear tree yellow leaf disease occurs is generally not lower than 8. As a result, the soil is too compacted, the concentration of ferrous ions in the soil is less, and the calcium in the soil is too high, and the ions have an antagonistic effect on each other.

The aggravation inhibited the absorption of iron by pear trees, resulting in the lack of iron-catalytic enzymes in the pear trees when singing chlorophyll, and the formation of chlorophyll could not be normal and yellow leaves appeared.

3. Lack of nutrients. Deficiency is a major cause of yellow leaves in pear trees. First of all, if there is a lack of nitrogen, the leaf shape of the pear tree will gradually shrink, and the leaves will be mainly yellow-green. It starts from the lower leaves of the plant and slowly spreads upwards, eventually causing the whole leaf to turn yellow, and in severe cases, the pear tree will die.

Then there is the phosphorus deficiency, and if the pear tree is deficient in phosphorus, the leaf color will gradually darken, and then slowly turn to purple yellow. If potassium is deficient, the tip of the old leaf begins to turn yellow, and then the leaf gradually withers and dies.

The yellowing of pear trees is caused by iron deficiency, mainly due to insufficient ferric** in the soil. Leaf diseases mostly occur for a long time in the new shoots, and the symptoms begin to manifest from the young leaves at the top of the new shoots. In the early stage, the mesophyll loses green and turns yellow, and the leaf veins and both sides of the leaf veins remain green, making the leaves green and reticulated, and the diseased leaves become smaller.

With the aggravation of the disease, the degree of green of the jujube gradually increased, resulting in the yellowish-white color of the whole leaf. In the later stage, brown scorched spots began to appear on the edge of the leaves, and in severe cases, the whole leaves scorched and fell off, and the apical buds died. On specific new shoots, with the aggravation of damage, the leaves gradually scorched and fell off from the top down, and the young stems of the new shoots gradually turned brown and died from top to bottom.

When it is severe, you can see the yellowing of the upper leaves of the newly dismantled shoots in the whole garden from a distance, and you can see that there are many bare branches at the top of the trees up close. The degree of soil salinity is heavy, low-lying, high groundwater level, soil clay weight, and drainage.

Summary. The yellowing of the leaves of the pear tree may be caused by improper application of water, and if there is a lack of water, it is necessary to replenish it appropriately, and if there is too much water, it is necessary to promote the discharge of water. It may also be caused by unreasonable fertilizer application, lack of fertilizer needs to be appropriately supplemented, and fertilizer damage needs to be stopped.

It may also be caused by alkaline soil, and it is necessary to continue to loosen the soil, and if necessary, it can be replaced with new loose soil.

Hello, I am sorting out the answer according to your question, please wait a while Oh There is also a fruit on it, what is the reason.

Let's see if the roots of the pear tree are rotten?

What about the branches? It's still fresh.

This is a pear tree, lack of water, lack of iron (1) increase the application of organic fertilizer, intercropping green manure crops, improve the soil, increase the content of soil organic matter, and promote the conversion of trivalent iron dust in the soil to bivalent iron. In the spring of the pear orchard with heavy saline, the sedan chair irrigation was sent to wash the salt in time to eliminate the salt water and control the rise of salt. Buried iron fertilizer.

Do I need to spray any pesticides?

Apply some fertilizer and water in the watering.

Because it is not a bug, there is no need to apply pesticides.

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Hello, there are generally three reasons for the yellowing of pear leaves: 1. Insufficient fertilizer in the spring growth of Zenbi vigorous period, rapid growth, lack of fertilizer is easy to cause malnutrition and yellow leaves. Generally, fruit trees need to be supplemented with nitrogen fertilizer during the growth period and phosphorus and potassium fertilizer at the fruit stage.

2. Diseases, pear tree rot disease, mega yellow leaf disease and other diseases can cause pear tree leaves to turn yellow. 3. Insect pests generally include borers and other insect pests. However, the specific reasons should be analyzed in detail, and drugs should not be used blindly.

If it is a pest or disease hazard, you should also identify what the symptoms of the disease or insect are, and then you can use the medicine in a targeted manner. There are disadvantages and no advantages to indiscriminate and blind medication. If you are inexperienced, it is recommended to ask a local agricultural technician or an experienced fruit farmer to take a look at the land before using the medicine.