What to do if an apple tree gets dry rot? What are the effective prevention and control measures?

Apple ketone rot, commonly known as apple stem disease, can damage the branches and fruits of apple trees, making them unusable and affecting the benefits of growing apple trees. During the planting process, we found that apple trees under 10 years old are more serious, and some people can lead to tragedy in the garden. The weaker the tree of the fruit tree, the more severe the disease.

Different varieties of fruit trees are different.

Apple ketone rot has two strains per year, one from June to July and the other from January to October. If the rain is heavy in the rain, the incidence is high, and the infected fruit will rot this week. Apples can be infected by pathogenic bacteria in the young fruit stage, but the peak of the fruit is mainly close to the ripening period of the apple fruit.

After apple ketone sporozoite, most wounds caused by wounds, such as pests and mechanical injuries. In winter, pathogens can be in the affected area in winter, and when severe, the affected area can penetrate deep into the woody part, while the lighter epidermis appears. In the second year, when the temperature is right, the bacterial-type halogen begins to germinate and produce cyano, and the spores can multiply with wind and rain.

According to field observations, the graft site is most likely to be infected with apple ketone decay, some injured parts, plaque irregularities after infection and drying. Bacteria also infect fruits. In the early stages of infection, circular spots will appear on the surface of the fruit.

As the condition deteriorates, the spots will expand, i.e., circular. After the fruit is infected with disease, the rotten part of the decayed part has a brown mucus, acidic fruit smell, and then there will be stiff fruit after loss. The bacteria will continue to produce spores in the fruit and continue to infect other healthy plants.

In winter, through white trunks, the conditions are relatively small. The soil is rich in organic matter, the soil is deep, rich in humus, the fruit trees are strong, and the disease is very light. Therefore, it is better to prevent these measures from prevention and **.

Prevention of fruit trees and ** dry rot brushing:

1.Choose the right apple tree species to be planted.

2.In winter, organic fertilizer and microbial organic fertilizer should be applied to improve soil fertility and improve the ability of fruit trees. Reasonable pruning, before winter, removed branches that affected insects, and garden exits were destroyed.

However, there are too many dangers, so the fruit tree retains a certain growth potential, avoiding overhanging fruits explains the dead, and prevents pests. After harvesting the fruit, we should not neglect management. Before the leaves, insecticides and fungicides should be sprayed 2-3 times to minimize the number of anthracene pests.

We can choose to spray the stone mixture in the garden to synthesize.

3.After the spatula, apple ketone rot and the affected area are applied to the woody part, wound in stone hydrate or 5 times acetic acid solution plating to add 300 times melamine solution.

In general, apple trees are susceptible to dry rot outbreaks in dry and hot environments. Once the fruit tree is attacked by pathogens, it is necessary to spray the fungicide flusilazole in time to save it in order to prevent it from losing its own value. Therefore, it is very important to actively prevent and control dry rot.

The specific measures to prevent and control this disease include the following: 1. Select high-quality varieties. 2. Choose high-quality chemical fertilizers and strengthen water management.

Topical smear. Apply the lesions, the diseased parts, scrape off with a knife, go deep into the xylem, and apply the original solution of stone sulfur mixture on the wound, or 5 times of octyramine acetate + 300 times of fulvic acid.

The prevention and control of apple tree rot disease, for many years, people only pay attention to spring prevention and control, but ignore the autumn prevention and control, resulting in a high rate of the disease, can not be thorough, but according to the incidence of rot disease, the spring scraping treatment drug is changed to autumn prevention and control, combined with spring prevention and control, and bridging the large disease spots, can receive good control results.

First, the law of apple rot pathogen is a weakly parasitic fungus, which overwinters on the bark with mycelium, conidia and molecular spore angles, and the pathogen spores spread the damage by rainwater splashing. Summer is the active growth period of apple trees, which is not conducive to the spread of pathogens and pathogenesis. However, the dying tissues in the litter and other parts of the bark create good conditions for the spread and infection of rot disease, and the bacteria that invade the bark form small epidermal ulcer spots after expansion. When the tree enters the dormant period, the living ability decreases, the onset accelerates, and a small peak of disease appears, and the symptoms are obvious, but the deep rest period expands slowly.

2. Prevention and control measures According to the characteristics of the spores of the pathogen spread by rain in summer, after scraping off the dead tissues of the fallen cortex, the stem of the tree and the branches of diseased insects in autumn, apply 50 times 4% pesticide resistance 720 fruit tree liquid to eliminate the latent infection base of pathogenic bacteria. Combined with the prevention and control of other diseases of fruit trees, 4% pesticide resistance 120 fruit tree type 600-800 times or 1 2 200 times Bordeaux solution 3-4 times a year is carefully and thoughtfully sprayed to eliminate pathogenic bacteria in the latent infection period and fundamentally control the onset of dormant period.

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There are many kinds of medicines, effective and convenient, I recommend using the new enemy rot of Shandong Agricultural Sage, scraping off the rotten place, and applying the original solution on the line, which is effective ** rot disease, and has a good healing effect!

It is very important because apple trees are very susceptible to dry rot, which can affect the yield of apples, so it is important to take good control measures.

You can plough the soil, especially in winter, choose to do it when the weather is better, you can effectively remove some pests and diseases, you can also sprinkle some quicklime in the soil, you can also effectively remove pests and diseases, and you can also sprinkle some pesticides in the spring to prevent the appearance of this pests and diseases, so this clever and clear control measures are very important, if not controlled, it is likely to lead to large-scale infection of fruit trees, resulting in large-scale yield reduction. Xiaoheng caused very large economic losses.

Of course, it's very important. If the control measures are not in place, it will lead to a reduction in apple production.

It is very important to increase the yield of apple trees, to prevent the death of large areas of apple trees, and to improve efficiency.

<> apple trunk rot is also known as carcass rot. It is mainly harmful to the main branches and side branches, and can also damage the main stem, twigs and fruits. Weakened old trees and young trees that have been poorly managed after planting are more susceptible. Let's take a look at apple trunk rot control measures.

Symptoms of apple trunk rot.

In the early stage of damage, the young tree forms black-brown lesions in the grafted part, and grows dense black small spots, which expand up and down the trunk, and the young tree withers and dies in severe cases. When the tree is damaged, the bark appears dark brown lesions, the appearance is damp, and thick brown mucus is attached to it, and the inside of the diseased skin tissue is dark brown, the texture is tough, and most of them are not rotten to the xylem. As the lesion expands, the lesion gradually loses water, forming a distinctly sunken black-brown dry patch.

The junction between the sick and the healthy is cracked, and the diseased skin is raised and peeled off. The disease grows small black spots, and when it is severe, many lesions are connected into patches, causing the death of large branches and even the death of the whole tree.

The occurrence of apple trunk rot.

Apple dry rot is a disease caused by fungi. The fungus overwinters on diseased branches and produces spores that spread by wind and rain in the following spring, invading from wounds, dead buds and skin pores. The pathogen has the property of latent infection, and after invasion, it first grows on the dead tissue of the wound and then spreads to the living tissue.

The peak of spinal disease is in June and August, and in October l0. The parasitic ability of dry rot fungus is weak, and it can only inflict on weakened plants (or branches) and seedlings at the slow seedling stage after transplantation, and first grow on the wound dead tissue for a period of time, and then expand to the living tissue, resulting in low water content of the bark of the tree and dry up and death of the branches. Generally, the disease is severe in hillside and hilly orchards.

Varieties such as Golden Crown, Guoguang, and Futu are susceptible to this disease.

Control measures for apple trunk rot.

1. Scrape off the lesions. The initial stage of dry rot is generally limited to the surface layer, and the lesions should be scraped and treated in time, and the diseased part should be coated with Fumei arsenic and other agents for disinfection after scraping. Heavy scraping can also be used to eradicate the germs carried by the tree.

2. Pharmaceutical prevention and control. Before the germination of fruit trees, combined with the control of other pests and diseases, spray 40 Fumei arsenic l00 times solution or Baume 3 5 degree stone sulfur mixture plus sodium pentachlorophenol mixture to protect the trunk. 5 and 6 months again two consecutive sprays l:

2: 200 240 Bordeaux liquid or 50 antibacterial special wettable powder 800 times liquid.

Improve the soil, increase the application of organic fertilizer, microbial fertilizer and farmhouse fertilizer, scientifically apply nitrogen fertilizer, and rationally formula fertilizer; Improve soil water and fertilizer retention capacity, timely irrigation and drainage during drought and flood; Scientifically control the amount of fruit, enhance tree potential, and improve the disease resistance of trees; Paint the trunk white in time before winter to prevent frost damage and sun burning; timely control of various branch pests; Avoid causing all kinds of mechanical wounds, and apply medicine to protect the wound to prevent bacterial infection.

It is necessary to strengthen the management of young trees, and the protection of pesticides should be done, and the spraying of drugs should be done, and the source of germs should be removed in time. Therefore, we must do a good job in these 4 points of prevention and control when planting.

Be sure to water in time, fertilize in time, pay attention to the density of planting, also control the intensity of light, but also pay attention to ventilation.

Fertilizer and water to strengthen the tree: The tree can be enhanced by increasing organic fertilizer, canning frozen water, raising leaves and protecting leaves, etc.

What are the symptoms of trunk rot in planted apple trees, the causes and how to prevent it?

1.Symptoms: Dead branches, apple trunk rot occurs mainly on the trunk. Due to the different degrees of occurrence and development of the disease, some are only in the upper epidermis, while others have penetrated deep into the entire cortex to reach the xylem.

Then the diseased area sinks and dries up, the junction between the diseased tissue and the healthy tissue cracks, and small swollen particles appear on the lesion, and the diseased area can be peeled off. Aging or weakened trees can lead to local branch death due to the rapid development of the disease.

2.The cause of the disease is poor soil, apple trunk rot can invade through root wounds and skin holes, and its occurrence is closely related to climate and natural environmental standards, and the threat of water is the main cause. An important cause of the disease is a lack of soil moisture in periods of drought and in sandy areas with poor water holding capacity and solubility, as well as in orchards on hillsides**.

Hillside orchards with poor soil and easy water outflow are seriously ill. As the average temperature increases, the cycle changes, and the somatic cells of the tree change exactly during the day. At the beginning of the night, the temperature suddenly drops at night, the tissue cells freeze, and the damage to the tree body is more likely to cause damage to the tree body, and the dry rot fungus is easy to invade.

The level of orchard fertilization is closely related to the occurrence of diseases. The incidence of orchards with high fertilization levels was significantly lighter than that of orchards with poor soil, and the diseases of organic fertilizer and biological fertilizer orchards were less.

3.The prevention and control methods strengthen the management of fertilizer and water, cultivate vigorous trees, and enhance the disease resistance of trees, which is the basis for disease prevention and resistance. Increase the application of organic fertilizer and biological fertilizer, prune reasonably, solve the problem of ventilation and light transmission in the orchard, and prevent and control pests and diseases in time.

When building a new orchard, choosing a plot of land with flat terrain and sufficient water resources to build an orchard and choosing disease-resistant varieties is the most effective way to prevent and control diseases. If you are buying seedlings from other places, be careful not to buy them from the place where the disease occurs, avoid the seedlings carrying bacteria, and carefully inspect the seedlings purchased. To be sure, it can be sterilized once before planting.

Dry rot is a common fruit tree disease, which is not treated in time and greatly affects the yield of fruit trees, so that the branches of planted seedlings, young trees, and old and weak trees are seriously diseased, often causing dead seedlings and even destroying the garden. The fruit rot was more severely damaged by Fuji series varieties. In recent years, there has been a trend of aggravation and has become an important disease of apples.

The dry rot of apples will damage the trunk and fruit, and the first disease will appear as lilac lesions, which will dry up the diseased tissues and even produce dry cracks; Dry rot occurs mostly in the cracks of the bark and frost-damaged branches, caused by pathogens, when cleaning the orchard, you can scrape off the old bark of the trunk, do not hurt the fresh bark, and then apply special drugs for fruit trees.

Branches rot, branches die, yields are severely reduced, pesticides need to be sprayed, and attention is paid to the removal of weeds.

Summary. Apple rot is one of the most common diseases of apple trees and is known as the "cancer of apples". The disease seriously affects the yield and quality of apples, and in severe cases, causes the death of fruit trees or even the destruction of orchards. The following control methods are simple and practical, for the reference of fruit farmers.

Methods for the prevention and control of apple tree rot disease.

Apple rot is one of the most common diseases of apple trees and is known as the "cancer of apples". The disease seriously affects the yield and quality of apples, and in severe cases, causes the death of fruit trees or even the destruction of orchards. The following control methods are simple and practical, for the reference of fruit farmers.

1.Chili liquor method: 50 grams of pointed red pepper (fresh chili pepper is better), chop it with a knife and put it into 500 grams of liquor, seal it for half a month and then use it.

In order to prevent the infection and expansion of the disease, it should be 1 cm beyond the edge of the lesion, the wound should be scraped smooth, and then smeared with chili wine, and then applied again after 7 days until it heals.

2.Nicotinic mixture method: 3 kg of industrial alkali mixed with 50 kg of water to make alkaline solution, and then add the kilogram of shredded dry tobacco stem, sealed for 3 days is nicotine mixture.

First scrape off the rotten skin of the apple tree with a knife, and then apply the nicotine mixture to the affected area, and apply it several times in a rowAlkaline water impregnation method: the edible alkaline surface and water are prepared into an alkali solution in the ratio of 1 5.

Scrape the scar and apply the alkaline water to the scar with a small brush, more than 5 cm around the scar, so that the alkali solution can fully enter the bark. Then wrap it tightly with plastic film. Apply again after 10 days, and remove the plastic film after half a year.

The rate of this method is more than 85%.

4.Brine impregnation method: Prepare salt water in the proportion of table salt, put it in a pot and boil, let it cool and set aside.

In March, April or August, September scrape off the scar, and use a sharp knife to scrape off all the scar necrotic bark on the branches of the fruit tree, so that there is no diseased tissue around the scraped scar. The bark around the scar is then cut into an inclined plane of 45 to 60 degrees to facilitate the healing of the scar. Apply the salt water to the scar after scraping with a brush, the application range should exceed 2 cm of the scar, scrape one place, apply one place, and apply it again after half a month.

5.Garlic liquid sterilization method: Mash the garlic into garlic puree, and add 10% salt water according to the ratio of 1 to 1 to make garlic liquid.

Scrape the scar first, apply the garlic liquid to the scar with a small brush or brush, 3 5 cm beyond the scar, and apply it again after 10 days. The rate of this method is more than 90%.

6.Caustic soda method: Use the caustic soda stock solution and 5 times water to apply the healthy bark of the affected area and the surrounding centimeters. After 3 days of application, the affected area dried up, atrophied and hardened, and after 10 days, the surrounding skin formed a callus.

Finally, I wish you all the best! <>