What is the disease of pear tree leaves and how to treat it?

This is pear tree rust and can be carried out with fungicides**.

How to maintain pear trees.

1. Temperature: Different varieties of pear trees have different temperatures that are most suitable for them. It can be kept at 13-21, which is generally suitable for each variety.

In addition, the cold tolerance of different varieties is also different, if it is a wild variety, it can even tolerate low temperatures of tens of degrees below zero, and in general, almost all varieties do not need to be cold-proof.

2. Light: The pear tree is a very light-loving plant, so it is necessary to provide sufficient light. In general, five to six hours of light per day is appropriate, and more light is needed in winter.

3. Watering: In the growth period, the water demand of pear trees is large, if it is planted in the ground, due to its large volume, the demand for water will be more, and it needs to be replenished in time. If it is a potted plant, keep the potting soil slightly moist.

4. Fertilization: In the growth period, the main types used are nitrogen fertilizers. At the flowering and fruiting stages, it is mainly potassium dihydrogen phosphate in fertile leaves.

Prevention and treatment of pear lobular disease:

1) In sandy land, barren mountainous land and saline-alkali pear orchard, the soil should be improved and organic fertilizer should be added. This is the basic work of preventing and treating lobular disease.

2) Combined with the application of organic fertilizer in spring and autumn, each tree was mixed with zinc sulfate 05 1 kg.

3) Before flowering, spray 03% zinc sulfate plus 03% urea mixture, spray again once after half a month.

Summary. Hello, dear, fate suffers first. When the young leaves of the pear tree are damaged, the leaf surface curls inward, and then one or both sides of the leaf are rolled longitudinally in a cylindrical shape.

During winter fertilization and clearing, the topsoil under the canopy can be turned 10-15 cm deep before the winter frost to freeze the overwintering larvae and spray the sulfur mixture before the buds of the pear tree germinate. In the growth period of spring and summer shoots, cut off the leaves damaged by larvae in time and burn them intensively, which can reduce the source of insects. It can also be used in the spring and summer pear tree extraction period, pesticide control, with 40% phosphorus emulsifiable concentrate 1000 times liquid + avermectin emulsifiable concentrate 1000 times liquid sprayed on the pear tree.

What disease does pear tree leaf have? How to treat it?

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Hello, dear, fate suffers first. When the young leaves of the pear tree are damaged, the leaf surface curls inward, and then one or both sides of the leaf are rolled longitudinally in a cylindrical shape. The topsoil under the canopy can be turned 10-15 cm deep before the winter frost when fertilizing and clearing the garden in winter, so that the overwintering larvae can be frozen to death, and the stone sulfur mixture can be sprayed before the buds of the pear tree germinate.

In the growth period of spring and summer shoots, cut off the leaves damaged by larvae in time, and concentrate on burning them in this town, so as to reduce the source of insects. It can also be used in the spring and summer pear tree extraction period, for pesticide control, with 40% phosphorus emulsifiable concentrate 1000 times liquid + avermectin cautious crude emulsifiable concentrate 1000 times spray on the pear tree.

What pesticides are used to control red star disease and leaf rust of pear tree leaves?

The former should be mixed into 1500-2000 times the liquid, sprayed every 10-15 days to control the crack, and then use the latter if it cannot be controlled.

Summary. Hello prevention and control methods.

1. Strengthen the inspection of seedlings to prevent the spread of seedlings with diseases.

2. Carefully prune, cut off diseased branches and shoots, and burn them in a concentrated manner.

3. Strengthen cultivation management, increase organic fertilizer, and enhance tree potential; Low-lying orchards, pay attention to drainage.

4. Spray 100-200 times of 3-5 Baumé stone sulfur mixture or 75% sodium pentachlorophenol wettable powder before pear tree germination to eradicate overwintering pathogens on branches. [1]

5. **Branch lesions.

What is the disease of pear trunk leaves and how to treat it.

Hello prevention and control method 1, strengthen the seedling inspection, prevent the grip to stop the spread of seedlings with disease. Duan Chongxian 2, carefully prune, cut off diseased branches, diseased shoots, and burn them intensively. 3. Strengthen cultivation management, increase organic fertilizer, and enhance tree potential; Low-lying orchards, pay attention to drainage.

4. Spray 3-5 Baumé stone sulfur mixture or 75% sodium pentachlorophenol wettable powder before pear tree germination to take 100-200 times of the solution to eradicate overwintering bacteria on branches. [1] 5, ** branch lesions.

Do you have any more questions?

Summary. How to cure pear tree microphyllosis?

What kind of medicine. Spring spraying control: After the apple tree sprouts, if it is found that the tree body germinates late and leaves appear, the tree can be sprayed with 0 2 (mass fraction, the same below) sulfate Xiaoshen zinc + urea + brassinolide 1500 times mixture to promote its branching and leaf development.

Do a good job in soil improvement for the construction of heavy stubble land: when building a garden on heavy stubble land, one is to dig up the old garden and then plant other crops first.2 Fight for 3 years to carry out stubble and condition the soil. Second, when and after the establishment of the garden, the draft should be full of organic fertilizer, generally 3000 4000 kg of farm fertilizer per mu or 1 1 5 tons of organic fertilizer, 200 kg of bacterial fertilizer per mu.

The third is to choose heavy stubble-resistant rootstocks.

Moderate pruning: First, it is necessary to prune at the appropriate time, and the tree body enters the dormant period after falling leaves to prune before the sap flows (from the end of December to February of the following year) to prune better, and it is better to avoid pruning with leaves after the sap flows, especially after the budding, pruning late will not only cause lobular disease, but also seriously weaken the tree. The second is to prune moderately, combined with the requirements of shaping, repairing and burying shears of different tree shapes, focusing on sparse knowledge and doing ants, and lightly cutting nonsense; Combined with summer scissors, Dora goes less:

Go to the big and stay small, plump the canopy; Shrink the big and leave the small, and the weak branches take the lead. It is best not to re-stub or continuous re-stub to avoid the occurrence of lobular disease on the main stem head or main branch.

Retraction during pruning, continuous retraction and re-shearing, late pruning or postponement of pruning and disturbing slag shears can aggravate the occurrence of lobular disease. The disease was more severe in orchards with heavy sandy soil, no organic fertilizer had been applied for many years, and the soil organic matter content was below 0-3 (mass fraction of plum celery).

The leaves of the pear tree are withered, what**, how**?

Pear leaf wilting can be caused by a variety of reasons, including lack of moisture, pests and diseases, malnutrition, etc. Method: 1

Check the soil moisture to make sure the pear trees are getting enough moisture, but avoid over-irrigation. 2.Check whether the pear tree is attacked by pests and diseases, and carry out the corresponding insecticide and sterilization treatment.

3.To supplement the pear tree with proper nutrients, fertilizers such as nitrogen, phosphorus, and potassium can be used in the spring. 4.

Strengthen the protective measures of pear trees to avoid further damage from pests and diseases, and use organic fertilizers to regulate the pests. 5.Prune the leaves of the pear tree that have been destroyed and the leaves withered, and clean up the germs and insect eggs on the leaves.

In conclusion, it is very important to detect and deal with the problem of leaf wilting in pear trees in time to keep the pear trees growing healthily.

1. Pear curly leaf gall mosquito

It is likely that the pear tree is infected with the pear leaf curl gall mosquito infestation, which is a relatively common infestation. Its larvae mainly damage young leaves, and once the young leaves are damaged, the leaf surface will curl inward, and the leaf curl will appear. Once this is the case, the infested leaves should be cut off as soon as possible and burned intensively, so as to reduce the source of insects.

Or spray drugs for prevention and control during the extraction of pear trees, you can spray 1000 times of 40% phosphorus emulsifiable concentrate and 1000 times of avermectin emulsifiable concentrate, and spray evenly on the pear tree, and the control effect is better.

2. Pear bifurcated aphid

The pear tree may also be infected with the pear bifurcation aphid, which will collect on the buds, leaves, and shoots of the pear tree, and will absorb the sap inside, resulting in leaf rolling.

Once the pest is found, the infested leaves should be cut off as soon as possible and burned or buried deeply. Not only that, but also to spray drugs, can be sprayed 10% acetamiprid 4000 6000 times, 50% pymetrozine EC 3000 5000 times, 25% thiamethoxam water dispersible granules 2000 2000 times, etc., these drugs can be a good control of the pest.

3. Pear iron tick

Pear ticks can also cause leaf curling in pear trees. Pear ticks like to suck sap on young branches and leaves, and May to June is the most seriously affected time for pear trees. After discovery, it is recommended to spray acaricides such as bacarfen, pyridadidone, and Baimanke, and use the drug once every 10 days or so, and it can be completely controlled two or three times in a row.

TemperatureIn order to ensure the normal growth and development of pear trees, growers need to choose the right temperature for cultivation, pear trees grow relatively quickly in a warm environment, so growers should provide higher temperatures during their growing season and relatively lower temperatures during their dormant periods.

Depending on the species of pear tree, the optimal growing temperature will also change, among which the white pear is 7-15; Huanghuali is about 10; The suitable temperature of sand pear is higher, above 15 and below 30.