Why does the apple blacken and dry the leaves and what to do about it?
Fruit trees, like everyone else, can get sick, which negatively affects their vegetative system. If the plant affects the pathology, it is necessary to urgently take measures for its treatment in order to save the tree. When foliage damage occurs, its nutritional system is disrupted, which negatively affects the yield. Sometimes the blackening of the leaves can talk about serious diseases in a tree, as a result of which it will simply disappear.
The reasons
The causes of blackening of the leaves can be many. It is necessary to elaborate on the signs that indicate the disease due to the fault of the gardener.
Blackening of the leaves at the tips and edges
Often this pathology is caused by the lack of necessary trace elements or the presence of viruses on the plant. In some moments, the disease arises due to a lack of manganese and magnesium.
In this case, it is easy to cope with the disease if you replenish the missing components by making special solutions at the root. It is also possible to carry out treatment with manganese or magnesium sulphate. For the preparation of a mixture of radical fertilizer is recommended to use dolomite flour and a mixture of magnesium.
When young leaves turn black, it can be caused by burning the roots. Usually this happens with young seedlings, if they were fed with fresh manure or were watered immediately after the planting with urea. Help in this case may be cleaning the upper layer of soil around the trunk. To avoid any problems, it is recommended to follow the rules of watering and care.
Black leaves after processing
Novice gardeners are often faced with a problem when their leaves on young apple trees turn black immediately after planting. The reason may be in a large concentration of feed solutions, as well as in the wrong time of the spray. But in any case, the appearance of such pathology suggests that the foliage is burned.
It is also worth remembering that an increased concentration of drugs that are used may cause irreparable harm to the tree, especially if copper-based drugs were used. Similar means need to be made in exact doses and not to carry out processing at a heat. If such a misfortune happened, it is necessary to support this tree. To do this, it is recommended to create a shadow for the sprouts and feed them with immune agents.
Black leaves on young trees
This is usually due to the fact that improper watering is performed, to which the shoots are sensitive at the first time after planting. Young seedlings need to be watered twice in 7 days or more often if it is very hot outside. If there is a lot of moisture, it will negatively affect the leaves.
In this case, it is necessary to restore the balance and reduce the amount of fluid in the soil. If this is not done in time, then infections may appear, especially in weaker seedlings. It is urgently necessary to remove the affected seedlings so that they do not infect neighboring trees.
Diseases
Not only the mistakes of novice gardeners, but also infectious diseases can provoke a strong blackening of the leaves.
Bacterial burn
This is a rather negative process that is poorly treated and negatively affects the apple tree, leading it to a serious condition. This disease can affect the entire garden if an infected seedling was previously purchased and planted in its territory.
At the initial stage, the pathology manifests itself as black dots on the leaves. They appear in spring and coincide with the flowering period. Also in some cases may appear in the fall. Such spots spread rapidly across the tree, the leaves begin to turn black and dry. At the same time, they do not fall, but the apple tree drops all the fruits, and therefore urgent treatment measures are required so that the tree does not die completely.
As a rule, the resulting disease spreads quickly throughout the garden.Pathology can affect not only the leaves, but also the fruits. Sometimes it even seems that the tree was burning. Experienced experts say that at a late stage, the disease cannot be defeated.
The treatment is carried out by cutting and destroying the affected fruits and leaves. Also, when pruning, you must grab 5 cm of healthy wood. All sections are disinfected with copper based solutions. Often used for this copper sulphate of low concentration. Then this place is covered with garden grease. It is also important to spray the trees. Do it in the spring, using such drugs:
- “Kuprostat”;
- "Oxy";
- "Hom";
- Bordeaux liquid.
When pathology affects a tree in the fall, spraying is done with a small concentration of urea solution. In the critical stage, the tree must be uprooted and the earth should be removed around it. Also, the primer should be treated with hot water with preparations containing copper.
Scab
This pathology can affect both fruit and deciduous mass. Manifested in the first stages of brown spots on the leaves. Then they turn black and dry out and fall off. The tree affected by this disease can live long enough. The fungus is a parasite and feeds on the life-giving elements of the plant. At the same time, the tree itself will grow poorly, and the crop will rot on the branches.
Pathology treatment is carried out comprehensively, several times during the whole season. When treating trees, uniform spraying is important. The last treatment is carried out in the autumn, when the tree is already preparing for winter, and the first must be done at the beginning of summer. Spraying is carried out three times per season, every 10 days. It is recommended to finish it a week before the onset of fruit.
Ring spots
This disease belongs to viral pathologies that slow down the development of plants. As a result of the appearance of the disease, the leaves become covered with yellow bloom, then turn black and increase in size. The disease can affect the entire apple tree, as a result of which it begins to grow slowly.
The trunk will not develop, and the shoots will be shortened. The treatment is carried out when carrying out the necessary agricultural techniques aimed at strengthening the immunity of the tree. Spraying is performed with the following immunostimulants:
- "Zircon";
- "Appin";
- "Health".
It should be noted that there is no means that can rid an apple tree of such a pathology completely.
Black raid
The appearance of such a raid on an apple tree may indicate that it is affected by cancer. The disease is fungal, and often becomes the cause of the complete death of the plant. When the leaves are covered with black bloom, it means that the disease is in the last stage.
Initially, it appears red spots on the leaves, which then gradually spread throughout the leaf and make it black. Plaque may be on the reverse side or on the front. The leaves after the appearance of plaque fall, they curl the edges, which leads to the fact that the tree loses all the foliage even in the summer.
The treatment of such a pathology is carried out exclusively in a complex way, since it can affect not only the leaves, but also the branches, as well as the roots. All affected elements and areas must be cut. Also, the tree is treated with antiseptics, including copper sulphate or Bordeaux mixture. Places where branches were cut are sprayed with antimicrobial agents.
Be sure to carry out and complete processing of diseased trees. It takes place three to four times during the entire season, every three weeks. Effective is the spraying, which combines the fungicides with various active substances.
Prevention
To avoid such complications and problems with trees and deciduous mass, it is recommended to buy planting material correctly. To do this, seedlings need to inspect and purchase them from trusted sellers. Keep the garden clean - an abundance of weeds in many cases becomes a breeding ground for bacteria.
Particular attention should be paid to lichens, which are parasitic on apples. All leaves and branches, as well as weeds must be burned, especially those that have signs of damage. In autumn, the soil around the trees is dug up, and the trunks are whitened twice.
It is important to produce and correct pruning. This is done at the end or at the beginning of the growing season, when the movement of sap in the trunks is slow. During this period, the wounds will heal quickly, and the infection will not have a chance to get inside the tree. When pruning, use decontaminated tools. To do this, use a solution of copper sulphate. Sections should be made small and treated with antiseptic.
Processing the whole garden
When the buds have not yet blossomed in spring, a full spraying is carried out in the garden for prevention. Previously, this was used "Nitrafen", but it is considered a strong pesticide, and therefore when working with him required accuracy. In some countries, this drug is banned today. Replace him serve such compositions:
- inkstone;
- Bordeaux mixture.
These preparations are recommended to treat the entire garden several times throughout the season. The concentration of the compounds should be small, on average 3%.
Feeding
It is also important to properly feed, which will help prevent the occurrence of pathologies in the trees. In the spring magnesium and nitrogen compounds are introduced, and in the fall - potash. At the same time it is necessary to observe the dosage and rules for the introduction of components that are on the packages.
As can be seen, in some cases it is possible to avoid the appearance of black deposits on the leaves or their complete blackening. To do this, follow the rules of care, as well as processing plants. In this case, the garden will enjoy a beautiful view and a great harvest. To preserve healthy plants, it is necessary to take a responsible approach to agricultural technology.
Carefully choose the seedlings that you will plant on your site. Inspect the plant, pay attention to its root, since it is there that you can immediately identify the symptoms, which indicate the damage of seedlings to diseases. When planting trees, it is also necessary to observe the landing pattern, distributing each instance at a distance from the “neighbor”.
See what the next diseases in apple trees are and how to deal with them.