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Book Summary

dl_book.jpg (1280077 bytes) Principles of Tree Hazard Assessment and Management

by David Lonsdale

'Principles of Tree Hazard Assessment and Management' is the latest handbook produced by the DETR in the series 'Research for Amenity Trees'. It completes a series of three essential research books with the other titles being 'Diagnosis of ill-health in trees' and 'The body language of trees'. As the title suggests the content of this book addresses the subject of tree hazard identification, assessment and management.

Chapter 1 Introduction. This chapter introduces the subject of hazard and risk.
Chapter 2 Potential Causes of Hazard. Chapter 2 includes sections on tree design, reaction wood, fork failure, grafts, uniform stress, root anchorage & injury, splits, decay as a hazard factor.
Chapter 3 Decay: its development within trees. This chapter describes the characteristics of the different types of decay found within trees. Subjects discussed include dysfunctional wood, rates of decay, methods of entry etc.
Chapter 4 Principle Decay Fungi. The characteristics and significance of the main tree decay causing fungi are described in detail (includes colour photographs and diagrams).
Chapter 5 Tree Inspection Procedures and Reporting. This chapter describes the different methods of inspecting and assessing tree hazards. It describes and explains many of the common defects found on trees. Other subjects include assessment of decay, decay detection devices, recording and reporting.
Chapter 6 Remedial Action. This chapter discusses the different types of action available to the consultant during the process of tree hazard management. Subjects include load lightening, crown reduction, topping, sail area, thinning, bracing principles & systems, propping, guying and treatment of decayed wood & cavities.
Chapter 7 Prevention of Hazards. Chapter 7 describes the ways and means of hazard prevention. Subjects include planning, nursery and pre-planting practices, tree establishment, vandalism, construction works, formative pruning, target pruning, pruning times, wound dressings and pollarding.
Chapter 8 Environmental Implications of Hazard and Disease Management. This chapter discusses the relationship between environmental issues and tree hazard management. Subjects include deadwood, diseases and veteran tree management.
Appendices. Appendix 2 contains a listing of common tree genera with information for each on the fungi causing decay, diseases leading to decay and mechanical characteristics. Appendix 3 contains examples of forms for the carrying out of tree risk assessments.

As with the other books in this series the 'Principles of Tree Hazard Assessment and Management' is another must for the arboriculturist. David Lonsdale has produced an excellent source of up to date arboricultural information for both the consultant and arborist.

Principles of Tree Hazard Assessment and Management by David Lonsdale. 388 pages. 156 colour photographs. Diagrams, tables etc. ISBN 0-11-753355-6. Published in 1999 and available from The Stationary Office. The book costs 29.99 GBP + p&p.

Link to book summary for Diagnosis of ill-health in trees
Link to book summary for The body language of trees.