Trees do not have the ability to replace or repair damaged tissues, but rather seal wounds by growing fresh tissue on top. This prevents further damage from insects or diseases. Once the tree starts to break down, the process cannot be reversed. When a tree is injured, the injured tissue is not repaired and does not heal.
Trees don't heal, they get sealed. If you notice an old wound, you will notice that it does not “heal from the inside out”, but eventually the tree covers the opening forming specialized “callous” tissue around the edges of the wound. After the wound, the new wood that grows around the wound forms a protective boundary that prevents infection or decay from spreading to the new tissue. Therefore, the tree responds to the lesion by “compartmentalizing or isolating older injured tissue with the gradual growth of new, healthy tissue.”.
In order to survive, trees must overcome their wounds. But they don't technically heal their wounds, at least not in the way human and animal bodies repair, restore, or replace damaged cells or tissues. The trees are constructed in layers of cells that are joined by rigid walls in a modular and compartmentalized way. This structure dictates your response to the wound.
No matter how much the bark of the tree has been damaged, you will have to repair the wound. Wounds of the trunk that penetrate the cortex will damage the cambium layer, a thin layer of vascular tissue, which is vital for the movement of water and nutrients. If less than 25% of the bark around the trunk has been damaged, the tree is likely to recover. When fresh wounds occur on the trunk, the injured bark should be carefully removed, leaving a healthy bark that is healthy and tight to the wood.
No need for a wound dressing (tree paint). You'll be able to see the wound closing from the edges every year as the tree grows. Trees can grow new leaves and branches every year, but when a tree loses its bark, it is unable to grow back. There are many things that can damage the bark of a tree, such as animals, fungi, or environmental factors, and healthy trees can usually heal themselves if the bark damage isn't too severe.
Do not paint on a wound with tar or tree paint. Letting the tree heal alone allows you to observe the process for the next few years to make sure that the wound is healing naturally. Do not clean debris inside a hole or cavity type wound, and do not fill the hole with cement or mortar. Doing so will prevent the tree from building new shoots to close the gap and continue carrying nutrients and water from the soil to the leaves and branches.
A tree responds to a wound but cannot heal it. If its bark is damaged, the tree responds by developing calloused edges around the wound. This new growth around the wound acts as a protective barrier to prevent tooth decay and infection from spreading to new tissue. The tree also creates a physical and chemical barrier around infected cells to help limit damage.
If the response measures of the tree are successful, any infection remains localized and cannot spread. These injuries are usually unintentional, such as cars, construction equipment or lawn mowers, bumps to the tree trunk or superficial roots, or improper pruning. It carries water and nutrients to other parts of the tree and can be nutritious for animals when it is more difficult to find other sources of food. But when trees are able to compartmentalize wounds and contain them with new growth, infections remain localized and do not spread to existing, undamaged or infected wood.
In case of major damage, you may be able to save the tree by providing a bridge of healthy tissue across the damaged area, called a bridge graft, similar to the process that professional fruit tree growers use to graft different types of trees together. A good tree care program includes looking for signs of problems by inspecting a tree for injuries and other injuries. Protect a tree from lawn equipment by planting plants other than grass that cover the ground or spreading mulch around the tree instead of growing grass there. All trees lose some branches during their lifetime and the wounds on these branch stems usually heal.
Ants can also damage trees and tree bark, although they are usually attracted to trees due to other insects that produce a by-product called molasses. A tree will seal over a small cavity over time, and the new wood on the tree is stronger than anything you put in the hole. While many injuries to a tree heal on their own, any breakage on the surface of the tree can be a place where decay can begin or where bacteria, viruses or insects can enter to further damage the tree or even kill it. Many causes, such as insect infestations, animal damage, environmental factors or human causes, can damage the bark of trees.
It is likely to depend on the species, where the tree grows, the health and vigor of the tree, the age, the extent of the wound and a dozen other variables. If you have problems with rodents, such as hungry gophers, rabbits and porcupines, the best way to keep these pests away from trees is to wrap the trunks with wire mesh. Large cavities may never close, but as long as the tree is not further damaged, a basal cavity may not be a problem. .