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Tree decay: a few questions still worth asking

Tree decay: a few questions still worth asking

January 2024

Tree decay: a few questions still worth asking

CPD hours or CEU points available

With Dr David Lonsdale

In 1982, David Lonsdale took on the job of leading a research project on decay in amenity trees. At the time, tree work practices were changing in response to research findings in the USA, where Alex Shigo and co-workers had developed the concept of “compartmentalisation of decay in trees” (CODIT). They had also demonstrated failures of wound paints to prevent decay. The resulting changes in tree work practice are now long established but David believes that there are still questions worth asking, especially the following:

  • The CODIT model was developed to replace the allegedly flawed heart-rot concept, which dated back to the late 19th century. Was the heart-rot concept really flawed?
  • Are decay fungi ever parasitic or pathogenic?
  • The “D” in CODIT is now often taken to represent dysfunction, rather than decay. Why might this be appropriate?
  • Wound paints: are they really useless?
  • Biocontrol of decay in pruning wounds: could this be worthwhile?
Dr David Lonsdale

Dr David Lonsdale is a consultant, author and educator, specialising in the biology, pathology and mechanical integrity of trees. After obtaining degrees at the universities of Southampton (1971) and Manchester (1975), he led a wide range of research projects on tree diseases and decay for Forest Research until taking early retirement in 2002. He also served on the Council of the British Mycological Society, of which he was Vice-president in 2000. He has continued to contribute to scientific journals and has also worked as a consultant and expert witness in cases involving tree failure.

Books written or edited by David include Habitat Conservation for Insects (1991), Principles of Tree Hazard Assessment and Management (1999) and Ancient and other Veteran Trees: further Guidance on Management (2013). He is a recipient of the Marsh Award for Insect Conservation from the Royal Entomological Society (2009) and the R.W. Harris Citation from the International Society of Arboriculture (2016).

February 2024

Tilia Trees and Wild Streets

With Dr Carrie Brady, Helene Kile and Ascha Pedersen

Tilia in the limelight: exploring the bacterial microbiome of diseased lime trees

February 2024

Why do we lose so many trees?

With Russell Miller and James Chambers

Why do so many urban trees get felled unnecessarily? This webinar will look at how bad law, poor risk management and weak arboriculture cause premature tree loss; identifying where the law and arboriculture must improve if they are to maintain public confidence through the biodiversity and climate crisis.

January 2024

Tree decay: a few questions still worth asking

With Dr David Lonsdale

David Lonsdale took on the job of leading a research project on decay in amenity trees.

January 2024

Roots

With Kristin Moldestad and Olve Lundetræ

Arboricultural Association is hosting a free live seminar featuring Kristin Moldestad and Olve Lundetræ.

Buy Roots here

January 2024

Beating the tree greenwash; my top tips for making urban greening happen

With Jeremy Barrell

Arboricultural Association is hosting a free live seminar featuring Jeremy Barrell.

January 2024

Forests before humans - from the first trees to the Ice ages

With Sir Harry Studholme

How trees evolved, from photosynthesis to the ice age. Their part in the last 380 million years of planetary history.

January 2024

Ancient Trees and Planning

With Jim Mullholland and Emma Gilmartin

Jim Mullholland and Emma Gilmartin joins us for a fascinating webinar centered around veteran trees and planning.

December 2023

Woodlands at War: The Impact and Legacy of WWI and WWII on Britain’s Woodlands

With Clive Mayhew

This webinar focuses on the largely overlooked contribution made by British woodlands over two world wars.

December 2023

Tree Selection for climate resilience

With Henrik Sjöman and Arit Anderson

There is an increasingly positive attitude towards trees and tree planting in urban environments, not only among landscape professionals, but from those who previously did not understand the importance of the urban canopy.

December 2023

Britain’s Ancient Forest - Legacy and Lore

With Julian Hight

Julian explores the story of Britain’s ancient forest told through its remaining ancient trees and surviving customs – living links to our rich history – accompanied by specially written forest music and archive photography.

November 2023

A farmer’s guide to ash dieback

With Eleanor Marks (LEAF) and Berglind Karlsdóttir (Forest Research)

Arboricultural Association is hosting a free live seminar featuring Eleanor Marks (LEAF) and Berglind Karlsdóttir (Forest Research)

November 2023

Thinking Arbs with Ted Green and friends – TREETIME

With Ted Green and friends

To celebrate the launch of his new book Treetime, the Arboricultural Association is hosting a free live seminar featuring Ted Green and some special guests.

Buy Treetime here

February 2023

Trees and Storms

With With Andrew Koeser and Allyson Salisbury

The last in this current webinar series is a FREE live webinar exploring the research around trees and storms.

February 2023

Trees in Development

With Sharon Durdant-Hollamby and Luke Fay

In this webinar we endeavour to delve into trees within the development and construction industry.

February 2023

Trees and the Law

With Dr Charles Mynors and Liz Nicholls

We welcome Dr Charles Mynors and Liz Nicholls to our webinars with talks and discussions around the subject of trees and the law.

January 2023

Guidance on Soil Assessment for Trees

With Claire Harbinson and Simon Parfey

Claire Harbinson and Simon Parfey, from Treework Environmental Practice, join us to discuss Guidance on Soil Assessment for Trees.

January 2023

European tree standards and the dangers of tree planting

With Jarek Kolařík and Martin Tušer

We welcome Jarek Kolařík and Martin Tušer to discuss the benefits and challenges of recent European Standards within tree care.

January 2023

Thinking Arbs: Retrenchment

With Ted Green and Reg Harris

Ted Green, Reg Harris and friends join us for a webinar to discuss retrenchment.

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