Alnus glutinosa
European
Alder
Betulaceae
Alder decline
Symptoms: Small leaves, thin foliage, necrosis at the lower trunk and yellowing. Cause is unknown.Diseases Alnus glutinosa
Leaf curls (Taphrina tosquinetii)
Extremely wavy leaves caused by fungi. The fungus should be controlled before an outbreak.
Galls (Eriophyes laevis laevis)
Leaf deformations caused by gall mites. This is not dangerous for the tree.
Galls (Eriophyes laevis laevis)
Leaf deformations caused by gall mites. This is not dangerous for the tree.
Alder tongue (Taphrina amentorum)
Leaf deformations caused by gall mites. This is not dangerous for the tree.
Canker (Nectria galligena)
Fungi that leads to the breaking off of bark. Affected twigs and branches should be removed and burned. If the trunk is affected, then an expert should be called to remove canker.
Classification Alnus glutinosa
Height: 8 - 25 m
Leave: alternate, round without a leaf tip
Bloom: March - April, male catkins, noticeable, brown / female, inconspicuous
Fruit: woody and cone-like, dark brown
Branches: heart-shaped roots
Bark: blackish brown, flat scales
Root: heart-shaped roots
Location: sun to half-shade
Soil: sandy to loamy, moist
ph-value: neutral to slightly acidic
