Bark beetle is a beetle that lives under the bark of a tree and feeds on it, as a result of which the tree will certainly die.
Apple, as well as wrinkled and unpaired bark beetles in their menu prefer fruit trees - apple, cherry, plum, etc.
Bark beetles are capable of destroying not only individual trees, but also entire gardens and plantations.
Fighting bark beetle It is extremely difficult, but with proper care and a certain treatment you can achieve success.
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Harm caused by bark beetle on an apple tree
As the famous saying goes, you need to know the enemy by sight. Therefore, to begin with, let us examine what the bark beetle is.
The bark beetle is a small-sized beetle, about 5-6 cm. The body of an adult beetle is hairy, brown in color, in shape close to the cylinder.
Penetrating into the trunk of a tree, the beetle settles there, feeding on living tissues.
The beetle also breeds inside the tree. In the spring, the female lays eggs, the hatching larvae live for a year in the turns done by the female, and feed on the sap of the tree, and in the spring they are formed into adult beetles.
The dust they throw out at the same time. In addition to eating the bark, these insects also act as carriers of diseases, both fungal and infectious.
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Why bark beetle attacks the apple tree
As a rule, the bark beetle chooses sick or weakened trees as a victim. Scientists have proven that these beetles have a very strong sense of smell, therefore, they can sense the trees they need, even at very large distances, up to a kilometer.
Weakened can be called trees that grow too close to buildings and to each other - this depresses their root system, they can not develop it fully. In addition, various damage to the mechanical nature of trees - cracks, open cuts, etc. are dangerous.
However, sometimes bark beetles attack healthy trees, and apple trees are especially susceptible to this. Often this happens if the bark beetle was wound up in the garden, and the tree damaged by the beetle was not processed in time.
Thus, the bark beetle, having dealt with one object, proceeds to the next, which is nearby.
This also includes the presence of deadwood, stumps and fungi on the site, which is an ideal place for bark beetles to live.
Also, the bark beetle can settle on those trees that were recently replanted - within 1-2 years. However, in this case, the cause most often is the weakness of the tree, which has not yet managed to take root sufficiently.
Another reason why a tree may be attacked by a bark beetle may be insufficient, incorrect or untimely treatment of the tree, as well as its complete absence.
Signs of bark beetle population
There are a great many wood pests. And the bark beetle is not always responsible for the disease or death of the tree. In order to understand how to fight, you first need to determine who to fight.
So, consider the main signs that indicate that the bark beetle has settled in the tree:
- the presence of brown or yellow rot near the tree - it is thrown away by the beetle in the process of gnawing the passages, and, moreover, the smell of this dust attracts other relatives of the bark beetle;
- woodpeckers appear in the garden or on a particular tree - these birds feed on bark beetles;
- round holes appear on the bark, they are also called flight holes, resin can also flow from there;
- bark is exfoliated from a tree trunk - this is a sure sign that the tree has already died and cannot be helped by anything; the right decision in this case is to remove the tree;
- under the bark of a tree there are drawings of various shapes - they appear as a result of laying eggs by females.
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Methods of dealing with bark beetle on apple
Fighting a bark beetle in the garden is difficult, sometimes unsuccessful. Of course, it is better to keep the trees in good shape, process them for preventive purposes in time, and then the risk of waging war on parasites will be reduced to a minimum.
However, what to do if bark beetles still live on the tree? Consider the methods of dealing with this dangerous pest.
1. Prevention of trees in the garden. This includes the identification of diseased trees, treatment, if possible, or complete removal in order to avoid neighboring infections.
2. Conduct regular inspection of trees on the site. If, as a result, signs of the appearance of the bark beetle were noticed, the affected part of the trunk should be cleaned of bark - as a rule, eggs laid by the female are in it.
If the affected area is small, you can sprinkle the tree with a solution of Carbofos or Chlorophos. It is also necessary to collect fallen leaves and dry branches - there may be larvae - and burn them.
3. One of the methods is catching beetles. Spend it in the spring, after trimming plants.
Pruned branches are placed around the skeletal branches of fruit trees. Over the summer, bark beetles settle on these branches, and in the fall they are burned.
4. If the branches damaged by the beetle are found, they should be cut off, and the trunks should be smeared with a mixture of manure and clay or oil paint.
5. Spraying trees with chemicals is carried out immediately after the trees are flowering, since it is during this period that beetles fly out.
Such processing can be carried out in several stages, but not earlier than two weeks after the previous one.
6. In addition, chemicals can be poured directly into the beetles gnawed by the beetle. For this use disposable syringes.
7. Conducting treatment with insecticides, you need to pay special attention to abundant wetting of the bark.
In many cases, this is enough, but the situation should be soberly assessed, and if the tree is badly damaged, it will be rational to cut it down to prevent the bark beetle from spreading to the other trees.