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Forest Research wins funding for research into oak tree health

Author:  Arboricultural Association
  26/08/2020
Last Updated:  26/08/2020
Agrilus biguttatus © Forest Reasearch

A pioneering new project to investigate the health of British oak trees has been given the go-ahead thanks to almost £2 million investment from the Biotechnology and Biological Sciences Research Council (BBSRC), the Natural Environment Research Council, Defra and the Scottish Government.

The project, named ‘BAC-STOP’ (Bacteria: Advancement of Control and Knowledge to Save Threatened Oak and Protect them for Future Generations’), will focus on acute oak decline (AOD) – an emerging and complex disease in which bacteria cause stem lesions on native species of British oak.

BAC-STOP aims to produce evidence to inform tree health policy and to develop practical measures for the management of AOD to enhance the resilience of British oak.

The project will involve a multidisciplinary team led by Dr Sandra Denman at Forest Research and includes the University of the West of England, Rothamsted Research, Bangor University and Aberystwyth University.

The project builds on previous research conducted by Dr Denman and her collaborators, and addresses research priorities identified by the Action Oak partnership and outlined in the government Tree Health and Resilience Strategy.

Dr Sandra Denman, the project’s Principal Investigator, said:

“We are delighted to be awarded this grant to work on bacterial diseases of British oak and other native broadleaved trees. Currently our trees face an ever-increasing pressure from pest and disease threats and environmental stresses aligned with climate change. Through this project our aim is to help boost the resilience of oak and secure their future in our landscape.”

Acute oak decline is a combination of factors which cause oak trees to become stressed. Environmental stresses like soil conditions, drought, waterlogging and pollution can all impact the tree. To improve silvicultural management of oak trees for disease prevention and resilience, long-term field trials will be carried out to investigate the impacts of these environmental impacts on the susceptibility of oak trees to AOD.

The project will also examine whether the bacteria present in AOD bleeds on oak are found in bleeds on other broadleaved trees. This will help researchers to assess the risk of the AOD bacteria to other tree species.

Using cutting-edge science, the project will assess the transmission of bacteria in AOD by studying the behaviour of the beetle Agrilus biguttatus (pictured above) which co-occurs with AOD symptoms. By gaining a better understanding of the beetle’s interactions with AOD bacteria and oak trees, the aim is to resolve the controversy of its role in the spread of AOD and to inform practical management of the disease.

A range of stakeholders will be involved in the research to explore social knowledge, attitudes, and motivations to act on AOD, helping to design realistic options for the management of oak health for future resilience.


This article was taken form Issue 190 Autumn 2020 of the ARB Magazine, which is available to view free to members by simply logging in to the website and viewing your profile area.