Tree Pests and Diseases

Observatree Field Identification Guides

These guides have been produced by Observatree, a citizen science project focused on monitoring tree health. More information: Observatree website. A poster of priority tree pests and diseases is here.

Individual field identification guides can be downloaded here (click on the cover images to open in a new window). 

European mountain ash ringspot associated virus

Mountain ash ringspot

Horse chestnut leaf miner

Horse chestnut leaf miner

Bronze birch borer

Bronze birch borer

Great spruce bark beetle

Great spruce bark beetle

Red-necked longhorn beetle

Red-necked longhorn beetle

Asian and citrus longhorn beetles

Asian and citrus longhorn beetles

Phytophthora lateralis

Phytophthora lateralis

Phytophthora austrocedri

Phytophthora austrocedri

Chestnut blight

Chestnut blight

Sirococcus tsugae

Sirococcus tsugae

Emerald ash borer

Emerald ash borer

Oak lace bug

Oak lace bug

Plane lace bug

Plane lace bug

Plane wilt

Plane wilt

Pine processionary moth

Pine processionary moth

Oak processionary moth

Oak processionary moth

Acute oak decline

Acute oak decline

Chalara ash dieback

Chalara ash dieback

Dothistroma needle blight

Dothistroma needle blight

Oriental chestnut gall wasp

Oriental chestnut gall wasp

 

 

 

 

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