Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free: https://www.ghostery.com/fr/products/

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site: http://www.youronlinechoices.com/fr/controler-ses-cookies/, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Realytics
Google Analytics
Spoteffects
Optimizely

Targeted advertising cookies

DoubleClick
Mediarithmics

The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at cil-dpo@inra.fr or by post at:

INRA
24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal Plant pathology unit - INRA AVIGNON

Pathologie vegetale

Zone de texte éditable et éditée et rééditée

Canker stain of plane tree

The disease is caused  by the fungus Ceratocystis fimbriata f. sp. platani, probably introduced into France from the USA in 1944

Ongoing research: selection of resistant plane trees

  • exploitation of sources of resistance identified in the USA
  • selection of the resistant plane variety Platanor Vallis Clausa (bred jointly by INRA / Nurseries ROUY Imbert) by controlled crosses between Platanus occidentalis resistant to canker stain and Platanus orientalis adapted to our climate
    • Read the article written by Inra/partners and agribusiness, 2010/01/28 : PLATANOR® Vallis clausa, a plane tree variety resistant to canker stain: a variety bred jointly by Inra and the Rouy Imbert Nurseries (Montfavet, Avignon)
  • continuation of the breeding program to increase the genetic variability of selected planes and thus to enhance the stability of resistance

 

How to recognize the disease?

canker with characteristic stain of the margin, blue-violet veins mixed with orange (click on the figure to enlarge)

How is the epidemic spreading?

The plane tree, an emblematic ornamental tree, is now very seriously threatened. The disease is spreading relentlessly in the south of France (Aquitaine, Languedoc-Roussillon (especially along the Canal du Midi), Midi Pyrenees, Rhone Alpes and PACA) and affects now some European countries (Greece, Italy, Switzerland ...).

  • main vectors: water, human activities (pruning, maintenance of ditches, construction, shipping ...), rodents and the plane itself (by anastomosis of infected roots)
  • epidemic development favors by diversity of pathways of canker stain propagation

Disease control

  • identification of a set of stringent prophylactic measures which may limit disease spread
  • no efficient fungicide treatment could be found
  • control measures for the disease have focused on genetic breeding of plane trees to produce trees resistant to canker stain

Bibliography

Vigouroux, A., and Olivier, R. 2004. First hybrid plane trees to show resistance against canker stain (Ceratocystis fimbriata f. sp. platani). Forest Pathology 34: 307-319.

See also

Scientific production on plane tree in the ProdInra database: open access bibliographic database that contains publications of the Inra's research units. Sometimes pdf files are provided as indicated by "pièce jointe publique"