What is the cause of peach tree leaf shrinkage disease causing losses to farmers?

Peach tree leaf shrinkage disease is a common disease caused by fungal infection, Ectophacystis teratomorphus, which occurs on peach trees. The disease mainly affects leaves, and in severe cases, flowers, fruits, and new shoots are also affected. When the symptoms are severe, the young leaves curl as soon as they are exhibited.

Similar to aphid hazards. The only difference is that the leaves are reddish, reddish-brown. In severe cases, the whole tree loses its green color and turns yellow-reddish-brown.

Photosynthesis is greatly reduced. If it is not prevented in time, it will cause a large number of spring shoots to die.

Peach tree leaf shrinkage disease grows rapidly in low temperature and humid environment, catching up with continuous cooling weather to create a favorable environment for low temperature and humidity. In daily management, we should pay attention to the application of scientific cultivation technology to minimize the conditions for the occurrence of leaf shrinkage disease, so as to better prevent and avoid the reduction of nectarine yield caused by leaf shrinkage disease.

Spread by wind and rain, it overwinters in the scales or crevices of peach buds. In the spring of the second year, when the peach tree sprouts, the overwintering spores grow germination tubes, which directly pass through the epidermis or through the stomata to harm the young leaves. The optimal temperature for germination was 20, the lowest was below 10, the highest was 30, and the optimal temperature for infection was 10 16.

The spores are resistant to drying, and the thick-walled spores are more cold-tolerant and can survive for more than 1 year in the orchard. In early spring, it was low temperature, rainy and long-lasting, which was conducive to the germination of overwintering spores, prolonged the infection period, and caused severe disease. On the contrary, the onset of the disease is mild.

I think the first cause of peach tree leaf shrinkage disease may be caused by too much sunlight or soil problems. So you need to put it in the shade and buy high-quality soil.

Peach leaf atrophy refers to a phenomenon in which peach leaves are affected by external factors such as bacteria, resulting in leaf shrinkage.

Peach tree leaf shrinkage disease mainly affects leaves, but can also damage young branches and young fruits. The occurrence of peach leaf shrinkage disease is closely related to the weather during the budding and leaf-opening period of peach trees in spring: low temperature, rainy and humid weather lasts for a long time.

Peach tree leaf shrinkage disease is a disease of peach leaves, and it generally occurs in the budding period of peach trees in spring, and it is also related to the environment and temperature, and will also affect the yield.

Pathogenic bacteria. The main species is Taphrina deformans (Berktul), which is one of the main diseases of Hubei peach.

Harmful symptoms. Peach leaf shrinkage disease is mainly harmful to leaves, and in severe cases, it can also damage flowers, young fruits and new shoots. When the young leaves are first extended, they appear curly and reddish in color.

The degree of curling and shrinkage of the leaves increases gradually, causing the whole leaf to be corrugated and convex, and in severe cases, the leaf is completely deformed. The diseased leaves are large, the thickness of the leaves is uneven, the texture is crunchy, and they are pale yellow to reddish-brown.

Pattern of onset. The fungus overwinters in ascospores or spores on the surface of peach bud scales or in the bud scale gap. In the spring of the following year, when the peach sprouts and spreads its leaves, the spores germinate and attack the young leaves or new shoots under the low temperature and humid climatic conditions.

When the general temperature is 10 16, the peach tree is most susceptible to disease, the temperature is above 21, the disease is less, and it generally only occurs once a year. Therefore, in years or regions with low temperature and rainy weather in early spring, leaf shrinkage disease occurs severely; Conversely, in early spring and years with little rainfall, the onset is mild.

Prevention and control methods. In early spring, when the peach buds begin to swell and dew red, spray 5 Baumé stone sulfur mixture, or 150 200 times the same amount of Bordeaux liquid once, which can reduce the source of disease, which is a critical period for prevention and control.

For peach orchards with serious disease, 600 800 times 80% mancozeb can be sprayed in time after flowering for protection, and sprayed twice continuously.

If there are a few diseased leaves in the peach orchard, they should be removed in time and burned in a concentrated manner to reduce the source of bacteria in the second year.

Summary: spray when the peach buds are red but have not yet been sprayed, generally use 70% wettable powder or 70% water-dispersed granules or 75% water-dispersed granules or 80% wettable powder or 80% water-dispersed granules 500 600 times liquid, or 50% wettable powder 300 400 times liquid, or 50% suspension agent or 500 grams of suspension 400 500 times liquid, or 36% suspension 300 400 times liquid evenly sprayed, spraying 1 time can effectively control the occurrence of leaf shrinkage disease.

First of all, it will cause the peach tree to have stunted branches, and the branches may rot, and then it will also affect the yield of peaches, and peaches may also have a lot of black spots, which will also reduce yield.

First of all, it will affect the effect of production, it will also affect the fertility of the soil, it will also affect the yield of peaches, it will also pollute the environment, and it will also affect the economic benefits of farmers.

It will cause the leaves of the plant to absorb nutrients, not to do photosynthesis, and will also affect the growth of the plant, will affect the yield of the plant, affect the quality of the plant and so on.

Increase the chance of bacterial infection, weaken the growth of peach trees, etc. Increases the chance of bacterial infection, especially when the temperature rises; Weakens the growth of peach trees and hinders the downward extension of the root system.

Summary. Peach tree leaf shrinkage disease is a disease caused by high content of heavy metal elements such as cadmium and zinc in peach soil, insufficient phosphate content, low soil pH value, poor soil aeration and other factors. Therefore, in order to prevent and improve the peach tree leaf shrinkage disease, it is necessary to improve the soil and supplement it with fertilizer.

When supplementing fertilizers, organic fertilizers need to be added first, such as well-rotted organic matter, chicken manure, duck manure, etc., which can increase the organic matter content of the soil, improve soil fertility and water and fertilizer retention capacity, and help improve soil structure and soil fertility. In addition, phosphorus and potassium-containing fertilizers, such as phosphate fertilizers, potassium fertilizers, etc., should be added, which can promote the growth and development of peach trees and enhance their resistance to pests and diseases. At the same time, the application rate of nitrogen fertilizer should be controlled to avoid excessive application of nitrogen fertilizer, which will cause peach trees to grow too vigorously and be susceptible to leaf shrinkage disease.

Peach tree leaf shrinkage disease is a disease caused by high content of heavy metal elements such as cadmium and zinc in peach soil, insufficient phosphate content, low soil pH value, poor soil aeration and other factors. Therefore, in order to prevent and improve the peach tree leaf shrinkage disease, it is necessary to improve the soil and supplement it with fertilizer. When supplementing fertilizers, it is first necessary to add organic fertilizers, such as well-rotted organic matter, chicken manure, duck manure, etc., which can increase the organic matter content of the soil, improve soil fertility and water and fertilizer retention capacity, and help to improve soil structure and soil fertility.

In addition, fertilizers containing phosphorus and potassium should be added, such as phosphate fertilizers, potassium fertilizers, etc., which can promote the growth and development of peach trees and enhance their resistance to pests and diseases. At the same time, the amount of nitrogen fertilizer should be controlled to avoid excessive application of nitrogen fertilizer to cause excessive growth of peach trees and susceptibility to leaf shrinkage disease.

Can you add, I don't quite understand it.

In summary, in order to prevent and improve the peach tree leaf shrinkage disease, the resistance of peach trees should be enhanced by improving the soil and applying fertilizer reasonably. However, the specific type and amount of fertilizer need to be adjusted and optimized according to the specific soil environment and the growth of peach trees. It is recommended that you consult with your local agricultural expert or soil testing agency for more accurate and detailed advice.

Summary. Dear, according to your problem, there are two fungicides preferred, which are also diluted 1000 times, and you can spray the peach tree for control. The two preferred fungicides for peach tree leaf shrinkage disease are 70% methyl tobuzine wettable powder and 50% carbendazim suspension, which are easy to buy on the Internet and in pesticide stores in life, and are very affordable and cost-effective.

The use of these two fungicides is also very simple, you only need to drink water and dilute 1000 times, you can spray peach tree leaves for control, spraying in stages, the effect will be better. I hope mine can help you<>

What medicine is used for <> peach tree with severe leaf shrinkage disease**.

Dear, according to your problem, there are two fungicides first, and Hu Ran's disadvantages are also diluted 1000 times, and you can spray peach trees for control. The two preferred fungicides for peach tree leaf shrinkage disease are 70% methyl tobuzin wettable powder and 50% carbendazim suspension, which are easy to buy on the Internet and in pesticide stores in life, and are very affordable and cost-effective. The use of these two fungicides is also very simple, only Duan Lao needs to drink water to dilute 1000 times, you can spray peach tree leaves for control, spraying in stages, the effect will be better.

I hope mine can help you<>

<> dear, the severe leaf shrinkage disease of peach trees is caused by a virus transmitted by peach aphids, and there is no specific drug to ** the disease. Therefore, the prevention and treatment of the disease is mainly from the following aspects:1

Scientific fertilization: strengthen the camp beam of peach trees, improve the immunity of peach trees, and reduce the occurrence of diseases. 2.

Pruning diseased leaves: Cut off diseased leaves in time to reduce the spread of viruses and prevent the spread of diseases. 3.

Prevention and control of peach aphid: chemical control, biological control and other methods are used to reduce the number of peach aphid and reduce the transmission rate of the virus. 4.

Enhance management: Strengthen the management of peach trees, remove diseased parts in time, and keep peach trees clean and hygienic. It should be noted that the prevention and control of peach tree leaf shrinkage disease requires long-term persistence, and it cannot be expected that the problem of oak field can be completely solved at one time.

If the condition is more severe, it is recommended to consult a professional plant pathologist or agricultural technician for on-site diagnosis and**.

1. How to ** peach leaf leaf curling disease.

2. What is the disease of peach tree leaf curling?

3. How to prevent and control peach tree leaf curling disease.

4. What is the disease of peach leaf curl.

1.The peach tree has curled leaves, which may be caused by infection with leaf shrinkage disease, and you can spray 800 times of 50% antibacterial special wettable powder and 1000-1500 times of 15% rust wettable powder on the peach tree.

2.It may also be caused by pests, if it is an aphid damage, you can spray insecticides such as insecticides, if it is a peach white stripe purple spot borer damage, you can spray 5% of the enemy to kill 2000-3000 times the liquid.

The prevention and control of the drug is as follows:

In the dormant season, spray 1000 times the solution of the general rock finch to eradicate the overwintering pathogenic bacteria. When the peach buds begin to swell in spring, it is a critical period for the prevention and control of peach leaf shrinkage disease, spray 1000 times of crude source early tree protection general, or 1000 times of 70% methyl tobuzin wettable powder, or 1000 times of 50% carbendazim suspension.

In the peach tree growing season in March and June, that is, after the leaf development to the arrival of high temperature and dry weather, you can choose to add methyl tobuzin or carbendazim to add a new high-fat film to use, which can keep warm and moisture.

Agricultural control can also be used. When building a new peach orchard, choose varieties that are both high-yielding and disease-resistant. For peach orchards that have entered the fruiting period, it is necessary to do a good job in soil, fertilizer and water management, carefully shape and prune, and improve ventilation and light transmission conditions.

Serious peach orchards should be fertilized and irrigated in time, and melons and fruits should be sprayed to make the nutrient duct thicker and enhance the tree potential. In April and May, combined with the pruning during the growth period and the prevention and control of larvae damage of the longhorn beetle, it was found that the shrunken leaves were immediately removed and burned intensively. Spray 1000 times the general of the tree guard liquid sterilization and disinfection to inhibit the spread and replication.

Peach tree leaf shrinkage symptoms

1. After budding, the young leaves are red and curly as soon as they are extracted, and then the leaves shrink and turn brown, and a layer of gray-white powder grows on the surface of the diseased leaves in the later stage.

2. A large number of early fall of spring shoot leaves weakens the tree potential, which not only affects the yield of the current year, but also has a negative impact on the yield of the second year, and even leads to the premature death of the plant. It will also harm fruit trees such as plum and plum.

3. When the new shoots are damaged, they become gray-green or yellow-green, the internodes are shortened, the leaves are clustered, and when they are severe, they are distorted and die.

4. Most of the flowers and young fruits are distorted and fall off, and the yield can be reduced by 30% to 80%.