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Identification and characterization of the main seed potato pathogens

nematod larvae
bacterial strains
oomycete oospore
Fungus mycelium
viral particle


More than 40 pathogens are accounted for in the seed potato certification scheme. The intensification of commercial exchanges, climate change and changes in cultivation practices increase the risk of the introduction and/or evolution of pathogens leading to the spread of new populations like, for example, viral variants of PVY species :(PVYNTN, PVYN-W) or Dickeya solani for bacterial species.

Knowledge of pathogen diversity, the development and validation of specific detection tools are three important ways to maintain the health status of the potato crops. To this end, several research projects are underway:

  • A study of biological, serological and/or the molecular pathogen diversity (virus Y, bacteria)
  • A study of the viral molecular determinants of PVY pathogenicity in potato (systemic infection, tuber necrosis) to facilitate the development of innovative tools for viral identification and characterization.
  • The development and evaluation of PCR methods (classical and real-time) for the identification of bacteria (Dickeya, Pectobacterium, Ralstonia solanacearum, Clavibacter michiganensis sepedonicus), fungi (Rhizoctonia solani) and Spongospora subterranea.


  • The development and validation of molecular methods for the identification of cyst nematode populations ranging from Heterodera sp. and Globodera sp. genera.
plaques Elisa

Strengthening of the serological diagnosis tools needed to characterize Potato virus Y (PVY)

A bank of 70 monoclonal antibodies was obtained and characterized onto a large collection of PVY isolates from and outside Europe.
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screen capture of the website

A new website dedicated to help the diagnosis of potato tuber blemishes online

The web site is a joined French and Scottish initiative and as presented during the last EAPR general congress last week in Brussels.
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logo rencontres de virologie végétale 2015

Identification of a new PVY group isolated from Brazilian tobacco fields

A deep knowledge of pathogen diversity is necessary to improve the efficiency of detection tools. For PVY, the characterization of isolates from...
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nematode larvae

NEMATOOLS : a CASDAR (French Ministry of Agriculture) project on nematodes of major importance for potato production

Among the plant-parasitic nematodes, Meloidogyne chitwoodi, M. fallax, Globodera pallida and G. rostochiensis are the most detrimental on potato....
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