These diseases affect him

Warning sign of a sick tree trunk

A sick tree cannot necessarily be recognized at first glance by a layperson. Therefore develop a eye for certain changes that indicate a disease or pest infestation. These include, for example:

• Birds nesting in trunk holes (v. a. Woodpeckers, they prefer rotten trees)
• Bats living in trunk holes
• bleeding injuries to the tree trunk, rubber flow, sap leakage
• damaged, cracking bark
• Drilling and feeding holes in the wood
• rotting spots, cracks
• visible fungus growth
• Fungi growing out of the trunk or root area
• Deadwood

The latter is often an indication of problems that lie below the surface of the earth, namely with the roots. If these can no longer adequately supply the tree, its aboveground parts gradually die off. There are a number of possible causes for this, for example an infection with viruses, bacteria or fungi. Voles can also cause considerable damage.

Typical diseases of the tree trunk

The above symptoms often indicate one or more of the following diseases. Many diseases are typical of the species, so their specific manifestation and cause depend on the respective tree species.

Wood-destroying mushrooms

There are some types of fungus that destroy the wood from the inside - and cause the tree to rot, even though nothing can be seen on the outside. An alarm signal is often the fruiting bodies that suddenly grow near the trunk or out of the trunk itself. But then the infection is already well advanced because the actual fungus - the mycelium - is in the wood of the trunk and / or in the roots.

White or brown rot

The wood-degrading fungi also include around 50 species that primarily feast on dead wood and cause either white or brown rot. You can recognize white rot by the fibrous wood, which often appears to be covered with a white-gray layer. In the case of brown or musty rot, on the other hand, the wood turns dark brown to black.

Tree crab

The so-called tree cancer is caused by bacteria or fungi and is characterized by strong growths on branches, twigs and trunk. In particular, growths that appear on the trunk (which are the bulging of wound tissue over a wound acts) can be problematic because the supply of the tree is disturbed or even interrupted can.