The important symptoms and characteristics of individual trees can be found in the index of deciduous trees.Apart from tree diseases that affect the leaves, trees can also be affected by pests, fungi diseases and other damages.
Hail, high winds, frost, dry spells, etc. can damage a tree. The appearance of these damages can be numerous (dried leaves, cracked bark, broken limbs). Parasites can attack the host plant in these damaged areas.
Mildew is a white covering over the leaves that can be wiped off with the fingers. In extreme cases, it should be brought under control. Images of Mildew disease
The mistletoe is an evergreen semi-parasite that takes away water and nutrients from the tree. An extreme case can cause a tree to die. Images of mistletoe
Mites belong to the arachnid group. They are only 0,1mm 0,5mm big and are equipped with a sting and suction ability. They affect leaves and buds. Affected leaves dry out. Extreme cases can cause the tree to weaken.
A moist crack in a tree trunk indicates decay within the trunk. The tree should be evaluated. It could be a fatal disease Image of moist crack
Red pustules are parasites in the wound that cause wilting of leaves and shoots. The orange-red boils appear in fall and winter. Affected areas should be cut back to the healthy stem. Images of red pustules
Shoots from a trunk often indicate a disturbance in the tree. This can be diverse. In an extreme outbreak of shoots, consult an expert. Images of shoots from a trunk
Tubers are growths that are caused by fungi, insects, or other environmental influences. These are not dangerous for the tree. Image of tubers
witches' besom are caused through virus diseases or fungi diseases. These are not dangerous to the tree. Images of witches' besom
The spectrum of wood destroying insects is very large. Frequently it is the larva of insects breeding in wood that damage the bark and parts of the wood core, which gives fungi the opportunity to infest a tree. An evaluation from an expert is advisable. Images of wood destroying insects