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Welcome to TreeAlert

Report suspected tree pests and diseases found anywhere in GB

About

Forest Research is the research agency of the Forestry Commission and Great Britain’s principal organisation for forestry and tree-related research. We are internationally renowned for the provision of science, research, evidence, data and services in support of sustainable forestry.

Within Forest Research, the Tree Health Diagnostic and Advisory Service provides advice and where possible diagnosis and identification of tree pests and diseases.

Tree Alert is used to gather information about tree health issues across Great Britain. This information supports important tree health monitoring and surveillance work, contributes to ongoing scientific research, and helps to protect the nation's trees.

Tree Health Reports

How to submit a report

How to submit a report

To submit a useful report of a tree health problem you will be taken through a series of pages where you will be asked a number of questions about your observation. The more information you can provide, the more useful your report will be.
What we do with your reports

What we do with your reports

We use the data obtained through TreeAlert to follow-up findings, to identify trends of spread, to direct surveys looking for regulated or quarantine pests and pathogens and to support pest and disease management.
Pests and Diseases

Pests and Diseases

If you want to know more about any specific pests and diseases then the main Forest Research website has a range of information available. Alternatively, the Observatree project has a range guides, posters and videos which can help with trying to identify a pest or disease.

Submit a Report

General Report

General Report

Submit a report of a problem affecting the health of a tree. If you suspect or know the cause then please use the Disease specific report, otherwise use this General report.
Pest or Disease Specific Reports

Pest or Disease Specific Reports

Submit a report of a specific tree pest or disease that you have seen.
Diagnosis Service

Diagnosis Service

If you own or manage trees you can request a diagnosis of a pest or disease problem. This may be a chargeable service.

More information is available on the Forest Research THDAS page.

Latest News

TreeAlert launches new user dashboard

TreeAlert launches new user dashboard

28th Aug 2024

TreeAlert has launched a new dashboard that gives registered users access to two years of TreeAlert reports as searchable lists, charts and map views.

Stem cracks in conifers – report it via TreeAlert

Stem cracks in conifers – report it via TreeAlert

2nd Aug 2024

Forest Research is undertaking a major study and asks forestry professionals across Britain to report stem cracks using TreeAlert, the online tree health reporting tool.

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