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Battle against pests and pathogens stepped up with new funding for national tree health laboratory

£4 million to expand world-leading laboratories to improve UK biosecurity and tackle emerging threats to tree health.

The battle against tree-disease spreading beetles such as the Emerald ash borer and the larger eight-toothed spruce bark beetle has taken a significant step forward thanks to new government funding.

The funding will pay for a new £4 million research and containment facility at the UK’s Forest Research Alice Holt Research Station in Surrey and will better equip the country in managing the risks posed by these harmful pests and pathogens, in plans unveiled recently (Friday 10 May) by Defra and the Forestry Commission as part of National Plant Health Week.

The new facility will expand the capacity of the existing Holt containment laboratory by almost double. This will boost capability to study pests and pathogens in a contained and controlled environment – enhancing our national response and facilitating safe international trade.

Statistics released by Forest Research recently show there were 2350 tree pests and diseases reported via the TreeAlert service service from April 2023-March 2024.

By assessing the pests and pathogens in a contained laboratory, scientists from Forest Research – Great Britain’s leading organisation for forestry research – will be able to study them in a safe and controlled manner using cutting-edge technology and equipment to safeguard our treescapes.

Biosecurity Minister Lord Douglas-Miller recently said:

The UK is a world leader in tree health and biosecurity and today we are going further in boosting our armoury to combat tree pests and diseases and manage emerging threats.

We are committed to protecting the country’s tree health and maintaining biosecurity to ensure our trees and woodlands are resilient to fight climate change. Building on the existing vital work of Alice Holt will be a key part to achieving this.

Defra Chief Plant Health Officer Professor Nicola Spence recently said:

Pests and diseases are a threat to our nation’s trees and plants. They cause significant damage, economic losses and in many cases tree death. Tackling them is a key part of commitments set out in our world-leading Plant Biosecurity Strategy to protect our nation’s plants and trees.

Funding this new facility at Alice Holt will boost our capacity in the fight against new and emerging threats and help us maintain some of the strongest biosecurity measures in the world.

Forestry Commission Chair Sir William Worsley recently said:

Trees and woodlands support our wellbeing, and are home to some of our most treasured species. The play an important role in tackling climate change.

It is vital that we expand our research to counter new tree health outbreaks which are a threat to our nation’s trees. This new facility at Forest Research’s renowned Alice Holt Research Station will boost and expand our response to ensure trees are resilient for the future.

Forest Research Chief Executive Professor James Pendlebury recently said:

The Alice Holt Research Station has played a key role in researching pests and pathogens to protect our forests, strengthening UK-wide efforts to combat pest and disease outbreaks.

It is important that we increase our capacity to combat these threats so we can continue our world-leading research. This investment will help Forest Research fight to safeguard our trees and woodlands for future generations.

Due to a changing climate, we are seeing a rise in the number of pests and recent years have seen an increase in the eight-toothed spruce bark beetle Ips typographus and ongoing responses to Phytophthora ramorum and oak processionary moth. The laboratory will also help prepare for known threats which are not currently present, such as Emerald ash borer – an exotic emerald coloured beetle from Asia which has spread to North America and caused significant damage to ash trees – and Xylella, a ferocious bacterial disease which has devastated olive trees in France and Italy.

The recent announcement supports delivery of the Plant Biosecurity Strategy for Great Britain, which committed to work with the industry and general public to protect the country’s plants from risks posed by pests and pathogens. The new facility will boost capacity for research on regulated pests and pathogens and ensure we can better respond to future threats.

The government has ambitious targets to increase tree canopy and woodland cover in England to at least 16.5% by 2050 and continues to take action to meet this with more than 15 million trees having been planted this Parliament, with future proofing our forests from disease a key part of our plans to increase tree cover.

Public vigilance is a key part of the fight against tree pests and diseases. You can look out for any unusual symptoms – like leaf discolouration or ‘bleeding’ lesions – on trees and report any sightings via TreeAlert, the GB’s online tree pest and disease reporting tool.

In a further move to protect the UK from harmful pests and diseases, the government has introduced a new set of global, risk-based border controls which will improve UK biosecurity, part of the Border Target Operating Model

Find out more about Forest Research’s Holt Laboratory here.

Notes to Editors:

  • National Plant Health Week, a collaborative week of action with over 32 organisations, is taking place from 6-12 May 2024.
  • This announcement supports delivery of the vision of the Plant Biosecurity Strategy for Great Britain.
  • Improving UK biosecurity and addressing threats to tree health is essential to meeting the government’s manifesto pledge on tree planting and the long-term vision set out in the England Trees Action Plan 2021-2024.
  • The announcement follows the launch of the Holt Laboratory, funded by Defra, in 2022, meaning Defra will have invested almost £10m on state-of-the-art tree health facilities in the last five years.
  • Forest Research is Great Britain’s principal organisation for forestry and tree-related research and is internationally renowned for the provision of evidence and scientific services in support of sustainable forestry.


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