Tree pest and disease alerts and advisory notes

Asian Longhorn Beetle ^(PDF-1721K)

Exotic Pest Alert

Diagnostic details of a quarantine pest of broadleaved trees.

Dutch Elm disease diagnosis ^(PDF-838K)

Information sheet

Symptoms and how to confirm the diagnosis.

Emerald Ash Borer ^(PDF-4140K)

Exotic Pest Alert

Diagnostic details of a quarantine pest that causes significant damage to ash trees (Fraxinus spp.).

Gypsy moth ^(PDF-573K)

Tree Pest Advisory Note

Lymantria dispar (Lepidoptera: Lymantridae) is an important defoliator of a very wide range of trees and shrubs in mainland Europe.

March 2007.

Horse Chestnut Leafminer ^(PDF-179K)

Exotic Pest Alert

Diagnostic details of a quarantine pest that has recently made its appearance in southern England.

Oak pinhole borer ^(PDF-264K)

Tree Pest Advisory Note

Wood boring beetle Platypus cylindrus that infests and breeds in cut trees, windblown trees, standing dead and dying trees.

Revised: April 2010.

Oak processionary moth ^(PDF-412K)

Tree Pest Advisory Note

A major defoliator of oak in Europe.

Phytophthora ramorum (Sudden Oak Death) ^(PDF-184K)

Exotic Pest Alert

Diagnostic details of a quarantine pathogen that has been found affecting trees in England.

Pine-tree Lappet Moth ^(PDF-595K)

Pest Alert

A threat to forests in Britain.

Problems on plane trees ^(PDF-437K)

Pathology Advisory Note 7

Pathogens that could potentially be very damaging to Planes (Platanus spp.) in the UK.

Western Conifer Seed Bug ^(PDF-235K)

Plant pest fact sheet

Leptoglossus occidentalis is a Nearctic leaffooted pine bug that is a relatively serious pest of conifer seed nurseries, particularly Douglas fir.