How can you tell if a peach tree has peach anthracnose? What are the characteristics of peach anthra

You can observe whether there is anthrax on the knee of the peach tree, see if the leaves of the peach tree will be perforated, and see if the young fruits will shrink and harden; The new shoots of the peach tree will have oblong lesions, and when the weather is wet, there will be small orange-red spots on the surface, and the diseased shoots will bend to one side.

At the beginning of the damage caused by anthracnose, the young fruit of the peach tree appears light brown water-stained lesions, which will be round or oval with the expansion of the fruit, reddish-brown, concave in the center, and the leaves on the branches are curly, and the branches die when the disease is severe. It can be seen that the characteristics of peach anthracnose are very obvious, so fruit farmers can judge whether the fruit tree has peach anthracnose according to whether there are similar characteristics on the fruit tree.

Anthrax mainly harms the fruit, but also can damage the leaves and new Shao, when the fruit is infected, it will show brown development, stop development, gradually shrink and harden, and then re-infestation the fruit in the later stage, and the light brown small spots expand into patches, resulting in fruit rot.

How can you tell if a peach tree has peach anthracnose? What are the characteristics of peach anthracnose? Characteristics of the disease:

During the veraison period, the surface of the fruit shows dark brown, constricts and hardens, and most of the stiff fruits hang on the tree; In the early stage, the lesions will be light brown and watery, and increase with the enlargement of the fruit, and the lesions in the middle and late stages will be brown, showing a ring or oval shape with significant dents. Very few of the killed fruits were attached to the branches, and most of them fell in May. However, in addition to the above characteristics, the biggest advantage is that the disease spots on the surface of the fruit are obviously dented, with a certain circumferential wrinkle, and finally the fruit is soft rot and most of it falls off.

The pathogenic bacterium of anthracite maggot disease mainly overwinters in the diseased tip organ with hyphae, and can also overwinter in the stiff fruits on trees. In the early spring of the second year conidia are generated. Conidia can be dispersed with wind, rain and insects, damaging the new shoots and veraison, resulting in the first sensation.

Since then, conidia have been formed on the regenerated lesions, resulting in reinfection. Charcoal maggosis is characterized by its infectivity during all growth and development periods, so its prevention is crucial.

High and low temperatures are the mainstream standards for the generation of pests and diseases. Plantations in the network of rivers, lakes and rivers have a higher prevalence of disease. The disease of fruit is mainly in the rapid growth period of fruits, followed by the pre-harvest period.

Ultra-low temperature and heavy rain during the flowering and veraison period of peach trees will also increase the disease rate, while the disease will be more serious in the warm and rainy natural environment of high and low temperature when the fruit is ripe. In addition, the disease is also quite serious in plantations with extensive management, too dense branches, heavy soil layer, low-lying terrain, poor drainage pipes, and weak plant shape.

Manpower prevention: peach fruit bagging can alleviate the occurrence of pests and diseases. In order to solve the pathogenic bacteria of winter, the root of the tree and the cause of the initial infection were eliminated by pruning and pruning in winter.

Before and after the peach buds sprout to bloom, it is necessary to repeatedly cut off the diseased dry branches and vine blight that occur one after another, so as to avoid the diseased part causing spores and carry out re-impregnation.

At the beginning of the disease, light brown lesions appear on the leaves, and after expansion, they appear nearly round, irregularly shaped, yellow-brown; There are small black-brown dots on it, and ochre-red muxspores overflow under high humidity, so what are the prevention and control methods of anthrax? In the early stage of the disease, cut off the diseased leaves, and burn the dead branches and leaves in the green space in time to prevent the expansion; Do not plant too dense or place indoor flowers too densely, do not pour indoor flowers from the top of the plant, and always keep ventilation and brightness. Clean the countryside in winter, and burn the sick and remnants in time; During the onset of the disease, spray 1000 times of 75 methyl tobuzine wettable powder, 600 times of 75 chlorothalonil wettable powder, or 500 times of 25 carbon trane wettable powder, 900 times of 25 diphantyl emulsifiable concentrate, or 50 antibacterium 800 to 1000 times of grinding, or 50 times of 500 times of carbon Fumei wettable powder.

Once every 7 to 10 days, 3 to 4 times in a row, the prevention and control effect is better.

In terms of early prevention and management, 3-4 Baumé stone sulfur mixture, 1000 times 12 alconazole, 250 times 80 sodium pentachlorophenol, 10 heavy diesel emulsion and other drugs can be used before the germination of fruit trees. At 10-15 days after flowering, use 200 times high lipid film emulsion, 1000 times 70 thiophanate-methyl, 1000 times 72 fu? Zinc and other drugs are sprayed for prevention.

Prevention and control methods of peach tree anthracnose 1, pruning and disinfection.

After the tree leaves fall in autumn to early spring, combined with fruit tree pruning, all the diseased branches, leaves, fruits, residual branches and fallen leaves and weeds in the garden are cleared out of the garden, and they are buried or burned in a concentrated manner, and sprayed for disinfection and sterilization of the whole garden.

2. Fertilization and disinfection

When fertilizing, try to increase the application of rotting organic fertilizer, farmhouse manure fertilizer, biological fertilizer, scientific proportion of nitrogen, phosphorus and potassium fertilizer, and do not overapply nitrogen fertilizer.

When applying basal fertilizer in autumn, quicklime can be sprinkled with quicklime throughout the garden for soil disinfection according to the dosage of 60-80 kg per mu.

3. Watering prevention

According to the demand for water during the growth period of peach trees, reasonable watering should be carried out in different growth periods, and flood irrigation should not be carried out in large quantities, and drainage should be carried out in time after rain to prevent excessive humidity in the field from inducing diseases.

4. Thinning flowers and fruits

According to the soil moisture, tree potential, tree age, planting varieties and large loads, do a good job of pruning fruit trees in each season, and reasonably thin flowers and fruits during the flowering and fruit period.

Maintain the uniform distribution of fruit branches, the moderate amount of flowering and fruit set, the excellent wind and light environment of the tree body, and the balance of vegetative growth and reproductive growth.

5. Prevention and treatment drugs

In terms of early prevention and management, 3-4 Baumé stone sulfur mixture, 1000 times 12 alconazole, 250 times 80 sodium pentachlorophenol, 10 heavy diesel emulsion and other drugs can be used before the germination of fruit trees.

At 10-15 days after flowering, use 200 times high lipid film emulsion, 1000 times 70 thiophanate-methyl, 1000 times 72 fu? Zinc and other drugs are sprayed for prevention.

In the new slightly extracted repentance period, young fruit stage, and fruit expansion stage, 800 times 75 carbendazin, 600 times 50 antibacterium, 1000 times 70 methyl tobuzin or Bordeaux liquid and other drugs were sprayed to protect the fruit.

6. Spraying control

In the early stage of the disease, 700 times 70 mancozeb + 900 times 70 thiophanate-methyl, 700 times 70 mancozeb + 800 times 50 carbendazim, 700 times 70 mancozeb + 800 times 10 difenoconazole and other drugs were used for compound spraying and control.

7. Serious treatment of diseases

When the disease is severe, can you use 600 times 70 thiophanate, 500 times 50 iprodione, 2500 times mycloconazole, 2000-2500 times 10 difenoconazole, 1000-1500 times carbendazim? Ethyltrimencarb and other drugs are sprayed for prevention and control.

The symptoms of yellow spots on the leaves of a peach tree can be caused by a variety of reasons. Here are a few possible diseases and ways to control them:

1.Peach black spot: Caused by a fungus, it forms irregular black spots and yellow spots on the leaves of peach trees. Control methods include selecting varieties with strong virus tolerance, pruning peach trees in a timely manner every year, and applying fungicides regularly.

2.Peach leaf dwarfing disease: Caused by bacteria, yellow-green leaf spots form on the leaves of peach trees, while peach trees become dwarf and grow slowly. Good control methods include selecting healthy seedlings, maintaining good drainage and ventilation, and controlling insect pests.

3.Iron deficiency: The lack of iron in the soil caused by the plum kernel causes yellow spots on the leaves of peach trees. Control methods include applying iron-rich fertilizers, applying fertilizer regularly, and adjusting soil pH.

4.Aphids: Aphids on peach trees feed on the leaves, causing them to turn yellow and have yellow spots. Control methods include timely removal of eggs and insect pests, and the use of natural enemies to control the reproduction of aphids.

It is important to note that every symptom of yellow spots on the leaves of a peach tree can be caused by a variety of reasons, so it is best to consult a professional horticulturist or agricultural expert to judge** and provide appropriate control methods.

The symptoms of yellow spots on the leaves of the peach tree can be caused by a disease or physiological problem caused by a variety of reasons. Here are some possible causes and how to prevent them:

Peach sores (peach brown spot): This is a fungus-caused disease in which small, round, yellow-brown spots appear on the leaves that may enlarge and become dimple in later stages. Control methods include timely removal of infected leaves and regular spraying of appropriate fungicides.

Iron or nitrogen deficiency: Yellowing of leaves and yellow spots are common symptoms of malnutrition. Supplementing with the right fertilizer can correct this problem. Fertilizers containing iron and nitrogen can be applied to ensure that the peach trees receive adequate nutrients.

Viral infections: Some viral infections can also cause yellow spots on peach tree leaves. The virus is usually spread through insect infestations or wounds. The best way to prevent viral infections is to keep your peach trees healthy and take proper pest management measures.

Physiological issues: Peach trees may experience some natural physiological changes during the growing season, such as leaf aging or leaf spots. These usually do not require special controls, and maintaining good tree health can help reduce the occurrence of these problems.

For specific conditions and prevention methods, it is recommended that you have a local agricultural expert or horticulturist perform an on-site inspection and diagnosis. They can provide more accurate recommendations and solutions on a case-by-case basis.

Peach Tree Major Pest and Disease Prevention Techniques:

1. Peach bacterial perforation disease. It mainly damages leaves and fruits, causing leaf perforation and peeling and fruit cracking. The lesions on the leaves are nearly rounded, about 2 5 mm in diameter, reddish-brown, or several lesions are connected to form large lesions, and there are yellow-green halos on the edges of the lesions; The fruit is damaged, initially a light brown water-stained small round spot, then expands to brown and slightly concave.

Prevention and control methods: pay attention to remove diseased and dead branches and eliminate pathogens during winter pruning.

In early spring, spray Bordeaux liquid during the germination period of peach buds, or spray Baume 5 degrees stone sulfur mixture to kill overwintering bacteria; In the early stage of the disease, 72 streptomycin sulfate wettable powder, quinoline copper suspension and other agents can be sprayed.

2. Peach gum disease. Glue flow can occur on branches, new shoots, leaves, and fruits, with branches being the most serious. The bark of the diseased branches is rough, cracked, and not easy to heal, and a yellow-brown transparent gel is discharged.

There are many reasons for peach tree gum flow, one is physiological reasons, such as suffering from pests and diseases, improper fertilization (lack of fertilizer or partial nitrogen fertilizer), soil clay and heavy drainage, excessive pruning in summer, too deep planting, and one is caused by fungal infection.

Control methods: Strengthen comprehensive management, promote the normal growth and development of the tree, and enhance the tree potential.

The branches with serious flow gum should be scraped in autumn and winter, and the wound should be disinfected with Baume 5-6 degree stone sulfur mixture or copper sulfate solution.

The main stem is whitewashed, and the main stem is whitened twice in winter and summer to prevent the occurrence of gum disease.

3. Peach borer. It is an important fruit boring pest, after hatching, the larvae are bored from the fruit pedicle or the junction between the fruit and the leaf and the fruit and the fruit, and reach the heart of the fruit, and there are a large number of insect feces and yellow-brown glue in the damaged fruit and outside the fruit.

Prevention and control methods: scrape off the old warped bark of peach trees in winter or early spring to eliminate overwintering cocoons; In the growing season, the damaged fruit is removed in time, and the overwintering larvae are collected and killed in a concentrated manner before the fruit is picked in autumn. At the egg stage and larval hatching stage, 25 larvalurin suspension agent, 20 fenvalerate EC and 5 cypermethrin EC can be sprayed for control.

4. Peach heartworm. In recent years, the harm of peach heartworm has become more and more serious, which has a great impact on the quality of fruits.

Control method: Before the overwintering larvae are unearthed, cover the ground of the tree plate with a wide plastic film to prevent the overwintering adults from flying out and laying eggs, and combine it with ground pesticide control, the effect is better.

In the initial incubation period of larvae, 10 cypermethrin EC, or deltamethrin EC, or avermectin EC, and 25 chlorpyramide suspension were used to spray evenly. The focus of the spraying is on the fruit, spraying 2 times per generation, with an interval of 10-15 days.