Why does an apple tree dry up and how can a tree be saved?
Unfortunately, often gardeners have to observe a rather gloomy picture. On the apple tree, suddenly, as if for no reason at all, the leaves turn yellow, dry and fall off. The fruit tree, which until recently had a lush green crown, withers literally before our eyes. It is important not to waste time, to correctly determine the cause and help the apple tree. About what factors can lead to the drying of foliage and branches, as well as how to eliminate them, will be discussed in this article.
The reasons
So, if the trouble did happen, and you observe wilting leaves, you need to start by determining the causes of this phenomenon. And there are a lot of them.
The factors due to which the apple tree dries can be divided into several groups:
- neglect of agricultural technology, improper care of the fruit tree;
- attacks of harmful insects;
- disease damage;
- lack of trace elements, insufficient or untimely feeding.
In the following, these causes and factors will be discussed in detail. Methods for their elimination, ways to help the affected fruit tree will also be given.
Mistakes in care
Many novice gardeners and summer residents consider the apple tree to be a very unpretentious culture. Like, the main thing is that the seedling takes root, and then things will go by themselves. This point of view is fundamentally wrong.
Of course, there are wild varieties of this tree that grow in forests and fields without receiving any care. However, the fruits of such "free" apple trees do not have a good taste.The apples on them are very small, sour, astringent.
"Domesticated" apple trees are bred primarily to obtain a crop of a certain quality. Therefore, a tree spends a lot of energy on the formation of fruits.
And caring for a garden fruit crop requires a very competent and attentive throughout the life of a tree.
So, what mistakes in care can lead to the fact that the apple tree dries up literally before our eyes:
- In regions with frosty winters, the fruit tree must be properly prepared for it. If the trunk of the plant is not wrapped and protected from frost, there is a risk of formation of so-called frost cracks in it. They arise due to the fact that the moisture constantly contained in the wood fibers freezes and expands in volume. As a result, the capillaries of the trunk and the fibers of the cortex are damaged or torn.
In severe frosts, the superficial roots of the fruit tree can also be damaged.
Often it is the freezing of the roots and trunk that is the reason that a previously strong and healthy apple tree suddenly withered after the winter.
- Unsuitable soil can provoke a gradual drying of the fruit tree. In this case, individual branches begin to wither and die, and then all the leaves fall from the tree. Apple trees do not tolerate sandy and clay soils. It is also undesirable to plant a tree in soil with a high percentage of crushed stone and gravel.
- The root system of the apple tree may suffer due to excessive soil moisture or the close passage of groundwater. In this case, the oxygen supply of the root system is disrupted. Constant high humidity over time also leads to rotting of the roots of the tree. The apple tree under such conditions is very weak, practically stops growing, and actively loses foliage.
- When planting a seedling, you need to think in advance which plants and crops the growing apple tree will be adjacent to. Often the cause of poor development or drying of a tree is root competition.
In an adult apple tree, the roots are approximately twice as wide in diameter as its crown. Therefore, if other mature and powerful trees grow in the immediate vicinity, the apple tree may simply not have enough food.
- Also in the root zone, thinning or complete removal of weeds and grasses should be carried out regularly. Plants such as couch grass and timothy have a poisonous effect on the apple tree. You definitely need to get rid of them.
- It is important to observe the timing of planting seedlings. Landing is carried out in autumn or spring, in a landing pit prepared in advance for winter. Young trees planted in summer have a very low survival rate. The branches and top of the "summer" seedling quickly turn yellow.
- Excessive care and the use of chemicals in excess of the norm lead to chemical burns of various parts of the tree. Very frequent and unreasonably abundant treatments with pesticides and insecticides do not benefit the tree at all. The apple tree itself begins to suffer from aggressive substances: its leaves, trunk, bark, shoots.
- Incorrect pruning can cause weakening of the fruit tree. Particular attention should be paid to the processing of slices. Neglect of this procedure leads to infection of the culture with diseases, fungus and rot.
- The cause of partial or complete drying of the apple tree can also be an incorrectly performed vaccination. This process requires some experience and skill. It is worthwhile to study all its nuances well before grafting a fruit crop on your own.
- The leaves may dry out due to prolonged hot weather and dry air. The influence of this weather factor is especially noticeable if the apple tree is still young. Usually, only foliage reacts to dry air, and branches do not dry out.
Diseases and pests
Harmful insects and various diseases often settle in gardens and cause damage to plantings. Apple trees in this category of negative factors also have a lot of enemies. First of all, very young trees that have not had time to get stronger properly suffer. Also at risk are age-related, weakened apple trees.
Take a closer look at the fruit trees in the garden. In addition to the drying of foliage and branches, each disease or pest has a lot of its own specific features. And the exact determination of the cause of the drying out of the tree will help to take the necessary measures and save the apple tree.
A very common and insidious disease is cytosporosis. The disease affects mostly mature or old trees with thick bark on the trunk and branches.
A characteristic sign of cytosporosis is the drying of individual sections of the bark, the rapid drying of the branches. On various parts of the tree, including the fruits, dark formations appear in the form of tubercles and dry growths.
If a young apple tree is affected, cytosporosis is difficult to notice for a long time. Unfortunately, the disease often leads to the death of the tree if the tissue damage is too deep.
Another terrible disease with a formidable name is black cancer. The disease is considered incurable, you can only prolong the life of the tree by removing the affected parts in a timely manner.
At the initial stage, the disease manifests itself by the formation of many black spots on the leaf plates.After a while, branches and large shoots begin to dry out. Multiple extensive black ulcers on the trunk and bark of branches speak of a serious and advanced degree of the disease. Rot develops on the apple tree, causing the tree to die soon.
Scab often affects fruit crops. Brown and brown spots appear on the leaves, over time, the leaves dry out and fall off.
If there is a gray or white coating with dark patches on the buds and leaves, this is a sure sign of powdery mildew infection.
Fungal disease affects the foliage, bark, young shoots, buds and fruits of apple trees. If the disease began to actively develop during the flowering period, then the color and ovaries for the most part will dry out and fall off.
The period of greatest activity of this fungal microorganism is the beginning of June. At this time, sap flow is still quite active in the tree, young juicy shoots are developing.
Insect pests are also frequent unwanted guests in the garden. Their vital activity causes considerable damage to plantings and leads to loss or a significant decrease in the amount of the crop.
The following parasites most often attack apple trees.
- voracious aphid actively eats young leaves and shoots. This insect is in tandem with ants. The latter feed on the sugary liquid that aphids secrete in the process of life. Therefore, ants often carry larvae and adult insects closer to the location of the anthill. In the future, workaholic ants tirelessly climb the trunk to collect the nutrient composition from the bodies of these pests. Outwardly, aphids look like very small, oblong green rashes.It does not affect the branches and trunk, but settles on young leaves, sucking juices out of them and actively laying eggs.
With extensive damage to the crown, the tree is greatly weakened, the growth of young green branches stops, the foliage turns yellow.
- caterpillars they love to feast on the leaves and fruits of apple trees. They are quite easy to spot even with the naked eye. There are many species of this insect. The main task in the fight against them is the destruction of adults and larvae located on the crown.
- leaf roller, attacking apple trees and actively multiplying, gradually destroys foliage. A sign of defeat by this pest in the first place is the darkening of the leaves on one side or along the entire edge. Then the leaves begin to curl into a tube, darken completely and fall off. In a cocoon from a rolled leaf, the insect actively lays larvae and moves to healthy shoots.
- The appearance of cobwebs on twigs and leaves is a signal that the tree has attacked mite. The insect itself is very difficult to see. Yellowing and falling leaves will tell about his further activities.
- May beetle larvae live in the soil and feed on young plant roots. If they settled in the ground under an apple tree, it is likely that young growing roots will be actively eaten by them. Usually, when the larvae of the May beetle attack, the apple tree normally blooms in the spring. However, after the color crumbles and almost all the foliage turns yellow in July-August.
In addition to insects, some animals that dig holes and passages in the upper layers of the soil can cause harm to the apple tree. For example, moles or mice can damage young tree roots, thereby weakening the entire plant.
Their presence on the site can be judged by the presence of minks, earthen mounds, and areas with loosened soil.
nutritional deficiency
The last negative factor weakening fruit trees is the lack of essential nutrients. This may be due to the characteristics of the soil, insufficient or untimely top dressing. Or it is due to the introduction into the soil of substances that are not at all necessary for a fruit crop.
In particular, apple trees react sharply to a lack of sulfur, magnesium, and iron. The last element is especially important for the development of young seedlings. For feeding several times a season, use soluble complex fertilizers. The introduction of ammonia fertilizers significantly strengthens the immunity of the fruit tree. Nitrogen-containing preparations stimulate the development of the root system. It is also important to combine root and foliar top dressing.
How to save a tree?
A set of measures to save a tree depends on the specific reasons that led to yellowing, drying of foliage, drying of branches and bark.
If we are talking about gross errors in the growing process, proper care should be immediately provided to the culture.
Much attention must be paid to preparing trees for wintering. At the end of autumn, to protect the apple tree from freezing, abundant mulching of the root zone is carried out. The trunk is wrapped with spruce branches or covering material. After snow falls, a snowdrift is thrown around the trunk. All these measures will help to avoid the very detrimental effects of severe frosts.
Sanitary pruning of branches should be carried out regularly. An important point in this process is the timely and correct processing of all slices.
With excessive soil moisture, you will have to resort to transplanting a seedling or draining the soil.If the weather is hot and dry for a long time, it is important to provide the fruit tree with regular sufficient watering. Do not allow the growth of grasses and weeds in the near-stem zone. Regular weeding and loosening of the soil will significantly strengthen the tree and will contribute to more active growth and development.
Chemicals will have to be used to control specific diseases and insect pests. They are sold as ready-made solutions for spraying, or as suspensions or powders for dilution in water. Most often, drugs to combat major diseases and parasites have a complex effect. All of them are necessarily provided with detailed instructions for use and information on safety measures when working with them.
If the root system is attacked by rodents, special poisons are used.
Preventive measures
Few will argue with the fact that it is better to prevent any troubles than to disentangle their consequences. This approach is also quite fair regarding the care of fruit crops. Feasible and timely preventive measures taken will increase the chances that the apple trees in the garden will remain unharmed, strong and give a good harvest. And this, you see, is the most optimal and desirable option.
Do not leave fallen leaves, branches, fruits under the apple tree. The near-trunk area should be cleared of plant debris. In the process of treating diseases, all affected areas of the tree must be removed. With black cancer, this is the only way to deal with the disease.
Cut and sawn branches, foliage and affected fruits should be removed from the site as soon as possible or burned.
The tool that was used to remove the infected parts of the tree should preferably be disinfected.You can treat it with chlorhexidine or ignite it on fire.
Birds can be of great help in the fight against insect pests. It would be useful to place a couple of birdhouses on the garden plot. In winter, bird feeders can be equipped. Dead bark should be removed from the tree trunk in a timely manner. Insects often settle in the gaps and cracks between the dried areas, rot or fungus forms.
An important preventive measure is the treatment of the crown with copper preparations, Bordeaux mixture and complex broad-spectrum insecticides. Do not forget about the regular and timely feeding of fruit trees.
Tips for beginner gardeners
At the first stages of mastering the process of growing your garden, it is very difficult to delve into all the nuances and tricks. The following are some tips for those who have taken up gardening not so long ago and do not yet have sufficient experience in this matter.
- If there are clear signs that the apple tree is frozen during the winter cold, you can help it "thaw". To do this, gardeners water the tree with warm water with dissolved micronutrients. Set aside pruning until the buds open. Often those branches that seemed to be dead, nevertheless awaken. If the buds have not formed, the branches will have to be removed.
- If there is a high occurrence of groundwater in the area with plantations and there is no way to transplant a tree, you can maintain its dwarf size. So it will be possible to save the apple tree and at the same time unload the weakened root system.
- After a winter with severe frosts, the apple tree can be sprayed with a solution of heteroauxin. This composition stimulates the growth of young shoots, promotes wound healing after pruning.
- During the fight against aphids, do not forget about her fellow ants.It will require the extermination of anthills throughout the site. Otherwise, the aphid will almost certainly return to the garden again.
- Oversaturation of the soil with nitrogen has a negative effect. The introduction of this substance should be carried out according to the instructions and recommendations on the package. Excessive and frequent application of ammonia makes the plant very attractive to aphids and other pests.
- It is worth remembering that chemicals cannot be used if apples ripen on the tree. If there is an extreme and urgent need for this, you will have to abandon the use of fruits and subsequently destroy the crop.
- Careful high whitewashing of the tree saves from fungus and mold on the trunk. It is also a barrier to many non-flying insects.
- Very old fruit trees can dry out on their own due to age. You can support a perennial apple tree by fertilizing, timely removal of dead branches, cleaning the trunk from dried bark.
- If the foliage dries up mainly on the top of a young apple tree or seedling, then the reason for this is the defeat of the root system. Weakened roots cannot deliver nutrition to the upper parts of the plant. In this case, you should carefully examine the near-trunk zone for the presence of holes and underground passages of rodents and moles.
Other factors that led to root damage may be groundwater or freezing of the soil in severe frosts in winter.
Often, the larvae of the Maybug cannot be dealt with quickly. The fact is that they can live at a depth of up to one meter. Insecticide solutions simply do not reach all individuals deep in the soil. But it is known that the larvae of this insect really do not like ammonia. If you cultivate the soil in the near-trunk zone of the apple tree, the insects will hastily leave the unfavorable place.A solution of pharmaceutical ammonia is prepared in the proportion of 50 g of the drug per 8-10 liters of water.
See the next video for tips on caring for an apple tree.