Phytophthora cinnamomi

Ink disease

It is very destructive pathogen on trees of all age. Black spots and slime fluxes on the base of the trunk are typical symptoms. Also wood necrosis under the bark lesion can be seen. It causes death of roots, yellowing and reduction of leaf size in broadleaves, reddening of needles in coniferous. Attacked trees can decline and often die. Pathogen is limited in Europe by low temperature (frequent in south part, rare in north part of Europe). It spreads as its habitats spread with warmer climate.

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Symptom

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Black spots and slime fluxes on the base of the trunk are typical symptoms. Also wood necrosis under the bark lesion can be seen. It causes death of roots, yellowing and reduction of leaf size in broadleaves, reddening of needles in coniferous.

Tree Species: Pine, Beech, Oak, Chestnut, Plane, Rhododendron

Part of a plant- attacked: Tree trunk, Roots

Pest significance: Very harmful

Pest Category: Fungi

Invasive Species: Yes

Present in EU: Yes

Pest group: Others (birds, bacteria etc.)

Affected part of wood: Heartwood, Sapwood

Depth of damages: Under bark only, Up to 0,5 cm depth, Up to 2 cm depth, Up to 5 cm depth

The extent of damage: Lokally

Prevalence in Europe: Rare

Damaged products: Firewood, Wood chips