XDES - Extended Diagnostic Expert System - 2013


  1. To collect international data on plant diseases, such as pictures, descriptions, diagnostic, available treatments, etc.
  2. To format this information for uploads on the e-phytia/tobacco website and related portable applications.

In 2011 CORESTA proposed a cooperation project with the French National Institute of Agronomic Research (INRA) to translate their e-Phytia® tabac website into English. This website contains diagnostic and advice tools to recognise the symptoms, signs or pests observed on diseased tobacco plants, all organised in detailed fact sheets.

The Diagnostic Expert System Translation (DEXT) Task Force was launched. Once the translation was finished and all the proof reading done by some very generous CORESTA experts from American universities, namely from North Carolina State University (NCSU) and University of Kentucky (UKy), the e-Phytia® tobacco website went on-line and at the same time a mobile application called Di@gnoplant Tobacco® was created for smartphones and tablets. The DEXT Task Force, having completed its work, was disbanded in 2013.

However, most of the information was related to French data. Further to the interest shown by agronomists and phytopathologists in other parts of the world, a new Task Force was created in June 2013, called Extended Diagnostic Expert System (XDES), with the purpose to build a continuum of already accessible data and to add new information. In view of the extension of information collection worldwide, the Task Force was changed to a Sub-Group in 2017.


In order to share knowledge on tobacco diseases, international data on plant diseases (such as pictures, descriptions, diagnostic, available treatments, etc.) is collected and formatted for upload on the e-phytia/tobacco website and related portable applications.

The relevance and interest of the new data is discussed on a case by case basis with the INRA and CORESTA experts, and all new information checked by English speaking reviewers.


  • Additional information on U.S. situation provided by Mina Mila, NCSU, concerning Blue Mould, Fusarium Wilt, Bacterial Wilt of Tobacco, Tomato Spotted Wilt Virus (TSWV), Damping-off (Sore Shin, Target Spot), Black Shank, Stem Rot (Athelia Stem Rot, Southern Stem Blight), has been added to the e-Phytia® website and Di@gnoplant Tobacco application.
  • A new section called Seedlings has been translated from French and added to the e-Phytia® website and Di@gnoplant Tobacco application in the Diagnosis section by image.

Future work

  • To collect more information
  • To invite other countries or institutions to participate (provided they have data in English)

Both DEXT and XDES Task Forces reflect CORESTA’s will to exceed the boundaries of disciplines and organisations.  Interaction between INRA, NCSU and CORESTA is progressing smoothly as it already did during the translation phase. The common goal of all participants is to allow INRA’s researchers to offer Di@gnoplant-Tobacco® to the international public (Di@gnoplant-Tobacco® is their first and only application translated into English), and to permit other organisations and contributors to add their own valuable data to this application. CORESTA will regularly supplement and improve the e-Phytia® tobacco website to assist all tobacco farmers, extension specialists and research scientists.


Sub-Group members may be contacted via the CORESTA Secretariat.

Web links

e-Phytia® tobacco website

Di@gnoplant Tobacco freely available on Google Play and App Store

CORESTA Press Release: Di@gnoplant Tobacco (May 2013)


Updated November 2020


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