• Welcome to the LTOA website

    Welcome to the LTOA website

    The London Tree Officers Association (LTOA) constitutes the professional & technical voice for London's trees & woodlands Read More
  • Become a Sponsor

    Become a Sponsor

    The LTOA relies on subscriptions from its members and sponsorship to operate. Read More
  • CAVAT

    CAVAT

    Capital Asset Value for Amenity Trees (CAVAT). CAVAT provides a method for managing trees as public assets rather than liabilities Read More
  • How to Become a Member

    How to Become a Member

    Members can attend, for free, the the LTOA meetings which are held four times a year and cover a wide range of tree related matters. Read More
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  • Welcome to the LTOA website

    Welcome to the LTOA website

    The London Tree Officers Association (LTOA) constitutes the professional & technical voice for London's trees & woodlands Read More
  • Become a Sponsor

    Become a Sponsor

    The LTOA relies on subscriptions from its members and sponsorship to operate. Read More
  • CAVAT

    CAVAT

    Capital Asset Value for Amenity Trees (CAVAT). CAVAT provides a method for managing trees as public assets rather than liabilities Read More
  • How to Become a Member

    How to Become a Member

    Members can attend, for free, the the LTOA meetings which are held four times a year and cover a wide range of tree related matters. Read More
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The London Tree Officers Association

Welcome to the LTOA website. The London Tree Officers Association (LTOA) constitutes the professional & technical voice for London's trees & woodlands. Its aim is to enhance the management of the Capital's trees.

We hope that you find the LTOA website both interesting & informative. If you have any questions, comments or suggestions, please do not hesitate to contact us.

The LTOA – in association with Treework Environmental Practice – has released a new industry publication: Detecting and identifying canker stain of plane. This 48-page A5 colour booklet contains all of the essential information about canker stain (Ceratocystis platani) and should be regarded as essential reading for anyone interested in finding out more about the disease.

It includes chapters detailing morphology and infection strategies, movement and spread, symptoms, practical survey tips, sample collection and fungal identification, the UK and Italian methods of prevention and control and a comprehensive list of references and further reading. The text is accompanied by colour photographs on almost every page and drawings/diagrams to assist identification and diagnosis.

The booklet was authored by international expert in Ceratocystis platani Professor Lucio Montecchio, of De Rebus Plantarum at the University of Padua. This 2nd edition English-language version has been revised and updated by John Parker of the LTOA and Neville Fay of Treework Environmental Practice to include additional material relevant to the UK situation, including the methodology and results of the LTOA Protected Zone Status surveys for Ceratocystis in 2014, 2015 and 2016.

Since 2014 the LTOA has been leading on monitoring plane trees in London for the presence of canker stain, working closely with the Forestry Commission, Forest Research and several tree officers and managers to survey thousands of trees across the capital to meet the requirements necessary to retain Protected Zone Status This ensures that plane saplings can only be imported into the country from other areas which have been confirmed as being free of the disease.

The LTOA has developed considerable expertise in the subject and in October 2016 was confirmed as the UK partner in a new pan-European Euphresco project – Identification and early detection of Cryphonectria parasitica and Ceratocystis platani occurring on trees in Europe.

Copies of the booklet are priced at just £5 and are available to purchase from the LTOA.

Some example pages are available here

Please contact This email address is being protected from spambots. You need JavaScript enabled to view it.

Sponsored by Barcham Trees

How to Become a Member

Members can attend, for free, the LTOA meetings which are held four times a year and cover a wide range of tree related matters.

Click here to find out how to become an associate member