If you think you have spotted OPM you should firstly report any sightings to the Forestry Commission using their Tree Alert tool available from www.forestry.gov.uk/treealert or by email to opm@forestry.gsi.gov.uk. They can then keep track of the outbreak.

Secondly, please do not try to remove the caterpillars or nests yourself. They need to be removed by an Arborist who has had the correct training and has the necessary equipment require. The nests must also be disposed of properly to avoid the pest spreading.

Areas Affected by OPM

Originally native to the Mediterranean regions of Europe, the oak processionary moth continues to spread and is now well established in a number of countries including Germany, Belgium, and Holland. The caterpillars were first found in London in 2006 and government studies show the pest spreading on an annual basis.

Areas affected by Oak Processionary Moth
OPM is already established or quickly becoming established in many London suburbs.

West and Southwest London are most severely affected with OPM-infested trees confirmed in the following boroughs: Barnet, Brent, Bromley, Camden, Croydon, Guildford, Ealing, Elmbridge, Epsom & Ewell, Hackney, Hammersmith & Fulham, Hounslow, Islington, Kensington & Chelsea, Kingston, Lambeth, Lewisham, Merton, Mole Valley, Newham, Richmond, Southwark, Spelthorne, Tower Hamlet, Waltham Forrest, Wandsworth, Watford and Westminster.

Visit the Forestry Commission web site for more information on the spread of oak processionary moth.

Report Local Sightings of OPM

Public reporting of OPM sightings are critical to help monitor the spread of the pest, as well as to treat infestations. The Forestry Commission provides contact information and guidelines for reporting local sightings of Oak Processionary Moth.

Oak Processionary Moth Control Services

If you are looking to have your property treated by a professional, find a local Bartlett Tree Experts' office near you. Bartlett covers most areas in the UK that are affected by OPM, including the entire Greater London area. If your property is outside of the Bartlett coverage area, additional resources will be provided to help you find a qualified expert.

Sponsored OPM Resource

Learn more about Oak Processionary Moth by exploring Bartlett Tree Experts' technical report.