STIHL - Encyclopaedia of tree diseases - Grey Alder: Possible types of damage

Damaged alder leaves due to feeding by blackish-blue beetles

Zoned, grey-brown tree fungus

Wilted, rolled up birch leaves

Tree fungus which turns red under pressure

Sulphur-yellow tree fungus which causes brown rot

Tunnelling in alder leaves by wasp larvae

Leaf spot and needle blight due to road salting

Sparse foliation and small leaves on alders

Whitish or brownish tree fungus which is often coloured green by algae

Intensive deposit on leaves which can also be wiped off

Tree fungus with a flexible range of colours

Tree fungus on dead hazel branches

Raw material for tinder

Shiny black tree fungus with pale grey edge

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