Skip to main content
Contact Us
Tools and Resources


TreeAlert is the online reporting tool for tree pests and diseases, managed by Forest Research with funding from Defra, Forestry Commission, Scottish Forestry and Welsh Government. It is a valuable aid, allowing you to quickly report any suspect findings of tree pests and diseases which are of concern in Britain.

Help us gather information about the health of the nation’s trees, woodlands and forests by reporting signs of dangerous tree pests and diseases below.

TreeAlert logo small.jpg


Submit a report



The information from TreeAlert reports will support important tree health monitoring and surveillance work, contribute to ongoing scientific research in this field and, ultimately, support efforts to protect the nation’s trees.

What happens to TreeAlert reports

What do you need to do to make your report

How to take photographs

Diameter of a tree

Contact Us

Tools & Resources
In this section
Tools & Resources