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| Classification |
european alder |
| Height: |
8 - 25 m |
| Leaf: |
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 |
| Diseases: |
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european alder
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| Alder decline |
| Symptoms: Small leaves, thin foliage,
necrosis at the lower trunk and yellowing. Cause is unknown. |
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| Leaf curls (Taphrina tosquinetii) |
| Extremely wavy leaves caused by fungi.
The fungus should be controlled before an outbreak. |
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| Galls (Eriophyes laevis laevis) |
| Leaf deformations caused by gall mites. This is
not dangerous for the tree. |
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| Galls (Eriophyes laevis laevis) |
| Leaf deformations caused by gall mites. This is
not dangerous for the tree. |
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| Alder tongue (Taphrina amentorum) |
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| 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. |
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| Fungi |
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