The leaves of the pear tree are all black and dying, what is the reason? How is the medication used?

The leaves of the pear tree are all black, what is the reason? That may be caused by too much fertilization, you can water it multiple times, don't water too much at once, the main thing is to find the reason to carry out **.

The leaves of the pear tree turn black, which may be infected with pear scab, which will grow a black mold layer on the leaves, which will lead to defoliation in severe cases, and can be sprayed with antiseptic drugs such as teprazole, mycloconazole, and flusilazole in turn. It may also be infected with pear black spot disease, which mainly appears on young leaves, strengthen cultivation management, and spray 300 times the liquid at the onset of the disease. It may also be infected with pear blight rot, which can be sprayed with manganese zinc, mancozeb, methalene, etc.

1. Pear scab.

Symptoms: Pear scab, also known as black rot, is a common disease of pear trees, which can damage the green and tender tissues of pear trees, among which the leaves and fruits are seriously affected. After the leaf is infected, a black mold layer will grow on the leaves, and in severe cases, the entire leaf will be covered with black mold, causing the leaves to fall.

Prevention and control methods: pear scab is a fungal disease, you can choose terprazole, mycloconazole, flusilazole, tebuconazole, enaconazole, mancozeb and other bactericidal drugs, rotate the drug, spray once every 10-15 days, spray about three times in a row.

2. Pear black spot disease.

Symptoms: Pear black spot mainly appears on young leaves, and there will be pin-sized, round black spots on the leaves, and then gradually expand into nearly round or irregularly shaped spots.

Prevention and control methods: pay attention to cleaning up fallen leaves, dead branches, diseased fruits in the garden, usually strengthen cultivation management, and spray 300 times the liquid at the time of the disease, and spray it many times in a row.

3. Pear blight rot.

Symptoms: Pear blight rot is caused by infection with the Phytophthora fungus, which causes the leaves to curl and turn red, and the base or stem of the branch to dark green, which then gradually evolves into black-brown spots.

Prevention and control methods: scrape the skin in advance, clean the orchard, after the onset of the disease, you can spray 400 times of manganese zinc liquid of methalene, 600 times of mancozeb, 400 times of methafen liquid and other drugs, spray once every 10-15 days.

To prevent diseases, you can apply water-soluble fertilizer to fertile leaves.

Summary. Dear, this one you described belongs to pear trunk rot.

Dear, this one you described belongs to pear trunk rot.

None of them died.

Symptoms: The cortex of the branch becomes brown and slightly depressed, the diseased branch dies, and the black particles are densely populated on it, turning black. Symptoms of Trunk Infection:

The nascent ring-shaped ulcer spots, the lesion rings are dried and circular, and the aboveground parts are dead. After the seedling saplings are infected, the bark appears slightly wet spots, which resemble long strips of black and brown, and the branches are dead or wilted. The dehydration of the diseased part is concave, fission occurs around it, and the black particles on the epidermis of the trunk turn black.

Pro, specific prevention and control measures: the management of cutting and cultivation should be strengthened, and the application of farm fertilizer, bacterial fertilizer, medium and trace element fertilizer, silicon, calcium, magnesium and potassium fertilizer should be applied to enhance the tree. The removal of the remains should be burned, sprayed with chlorothalonil during the growth period, and stone sulfur mixture should be used for clearing the garden.

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.

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

If the leaves of the pear tree are withered, it is due to a variety of reasons, such as pests and diseases, lack of water, malnutrition, etc. You can take a closer look at the leaves and trunk of the pear tree to see if there are any signs of insect infestation or germ infection. If so, the corresponding pesticide can be used for spraying.

At the same time, to ensure that the pear tree has sufficient water and nutrients**, it can be changed to proper fertilization and watering. If the leaves of the pear tree have withered, the leaves and wilted branches can be cut off to promote new growth. If the situation is more severe, it is recommended that you consult a professional horticulturist or agricultural technician so that you can better solve the problem.

<> pear tree black leaf disease generally refers to pear tree scab, and its cause is mainly because the pathogenic bacteria overwinter on the pear tree, and its conidia are spread to the nearby leaves and young fruits through wind or rain in the next year, so that the plant is sick. Control methods: Reasonable pruning of pear trees to increase the light transmittance in the garden; scientific fertilization and watering to improve the disease resistance of pear trees; Spray with drugs such as black star leaf banling (1000 times liquid).

1. What causes pear tree black leaf disease?

1. The pathogenic bacteria overwinter on the axillary buds, branches or fallen leaves of the pear tree, and wait for the conidia on the diseased shoots to spread to the nearby leaves and young fruits through wind and rain in the spring of the next year, and when the environment is suitable, they will infect the leaves and young fruits, so that the plant will be sick.

2. The orchard is low-lying, with dense canopy, poor aeration, high humidity and weak tree strength.

2. Preventive methods

1. Strengthen management.

1) Reasonable watering and fertilization of pear trees to enhance tree strength and improve the disease resistance of the tree.

2) Reasonable pruning and leaf pruning to improve the ventilation and light transmission conditions in the orchard, and at the same time reduce the humidity in the orchard to reduce the transmission route of germs.

2. Fruit bagging.

After fruit setting, the systemic fungicide was sprayed once, and then the fruit was bagged immediately to prevent the fungus from infecting the fruit.

3. Remove the diseased shoots.

After the onset of the disease in early spring, the diseased shoots, leaves, and fruits should be removed at any time, and then taken out of the orchard and burned to eliminate the source of infection.

4. Choose disease-resistant varieties.

Varieties with strong disease resistance were selected as planting targets and new orchards were built.

3. Method

Use drugs such as black star leaf banling (1000 times liquid) for spraying, and if the condition is more severe, it can be sprayed once every 10 days or so.