Hollows in the trunks of older apple trees are a fairly common problem. It is not always clear whether it is necessary or beneficial for the tree to close the hollow.
What to do if the apple tree has a hole in the trunk?
As long as the apple treelooks he althy despite the hollowingand appears to be stable, you don't need todo anythingUntil a few years ago, it was still recommended to close the hole. However, in most cases this has been avoided.
How is the hole created in the trunk of the apple tree?
In most cases there is ainfection of the tree with wound rot. This usually occurs with:
- improper tree pruning,
- Branch breakage, for example after a storm,
- Trunk damage caused by rodents.
Should you fill a trunk hole?
Almost alltree experts now adviseagainstclosing the hollowwith filling materials such as mounting foam or cement. The reason: Since these substances react to moisture and heat completely differently than tree wood, the damage can even increase.
Quite often, gaps arise into which water penetrates. Since this can no longer evaporate, rot, pathogens or fungi become a problem. In addition, studies have shown that the stability of the apple tree does not improve as a result of the hole being filled.
How do I properly repair a hole in the apple tree trunk?
Acavity closingpatch is ide alto seal the hole. To do this, use a thin piece of metal or a plaster-covered shield that is secured over the tree hole. First remove standing water and rotten wood residues.
The patch prevents water or animals from entering the open area. At the same time, the apple tree still has the opportunity to grow over the wound on its own.
Is an apple tree with a hole a danger?
Thecannot be answered in general terms If the area where the hole in the apple tree trunk is located is structurally sound, the apple tree does not pose a danger even in stronger winds. If you are unsure whether the tree can withstand a storm, you should consult a professional arborist.
How do I proceed if I want to fill the trunk hole?
If you decide tofillingthe trunk hole, you can usemounting foam or cement:
- First clean the trough of water and remove the rotten tissue.
- Treat inner surface with a copper sulfate solution (wear protective clothing and mask!)
- Allow to dry completely.
- Coat the edge of the cave with garden pitch (€11.00 on Amazon).
- Fill in mounting foam or cement.
- Allow to harden and straighten with a garden knife.
Tip
Hollows in trunks are ecologically valuable
Trees are very important for many bird species native to Central Europe because they offer protected nesting and habitat. A tree trunk with a hole is often used as a breeding site by cavity nesters such as tits, woodpeckers and nuthatches. The apple tree also provides our feathered friends with plenty of food all year round, as a variety of insects live on it.