Common beeches are very robust trees that are rarely attacked by pests in a favorable location. Pests occur more frequently in beech hedges because the space is not always suitable and the trees are very dense. Recognizing and combating common beech pests.
What pests occur on common beech trees?
The pests that attack beech trees include beech mealybugs, gall midges, spider mites and fungi such as powdery mildew and downy mildew. Pest control varies depending on the species: mild home remedies, pruning measures or biological control can be used.
These pests cause problems for copper beech trees
- Beech mealybugs
- Gall mosquitoes
- Spider mites
- Mushrooms
Beech mealybugs are more common
Beech mealybugs, also known as beech ornamental lice, appear through sticky residues on the leaves and young shoots. The residue is called honeydew and is a good source of food for bees and ants.
A severe infestation causes the leaves to wither and fall off. In addition, the growth of the tree is hindered.
If the pests are not too numerous, try washing the copper beech with a decoction of field horsetail or nettle. Otherwise, cutting and, if the infestation is very severe, a commercially available sharpening agent will help. However, this should only be used in an emergency and as sparingly as possible.
Gall mosquitoes are harmless
Gall midges appear through small bumps on the leaves. They do not harm the tree. If the infestation bothers you, cut off affected shoots.
You should dispose of leaves after the trash as the pests overwinter in them.
Fighting spider mites
Spider mites appear when it is very dry. They cover the leaves with fine webs and cause them to die.
If possible, increase the humidity. Sometimes an old home remedy helps: spray infected branches with water and put a plastic bag over them.
If the infestation is very severe, it is worth using predatory mites, which are available from specialist garden shops.
What to do if the European beech tree is infected with fungi?
Powdery mildew and downy mildew occur when it is either too dry or too moist. As signs you will find mottled leaves in the case of downy mildew or leaves covered with a white coating in the case of powdery mildew.
You can treat milder infestations with fresh, diluted milk.
If the infestation is severe, cut off all affected parts and dispose of them in the trash can.
Tip
Common beeches have a very smooth bark and hardly any cork formation. Pests can therefore only enter if the bark is injured. To prevent pest infestation, apply artificial bark to larger wounds after cutting.
