R&D program


Understand the vine’s tolerance and fungi aggressiveness to limit wood diseases

Keywords : Diversity, varietal behaviour, tolerance, aggressiveness, wood diseases


The ToléDé project aims to reduce the compounding effect of wood fungi on vine dieback, by identifying the factors that contribute to grape varietals’ tolerance to wood diseases. The project will analyse varietal tolerance from a range of perspectives, and use the diversity of the most common fungi to identify the factors contributing to their aggressiveness targeting the factors contributing to the vine’s tolerance.

This crossover approach will help to accurately determine means for increasing tolerance through adapted viticultural practices, as well as revealing markers to assist current varietal improvement projects. In addition to improving the understanding of the biological interactions, the project will seek to suggest decision-making and dynamic-monitoring tools for vine dieback and for fungi populations.



Led by Jean-Pierre Péros from the INRA UMR AGAP, four other INRA units are participating in the project: the UMR Genetic Improvement and Mediterranean and Tropical Plant Adaptations (AGAP & UMT Géno-Vigne), the UMR SAVE in Bordeaux (Vineyard Health and Agroecology), the UMR BIOGER in Grignon (Biology and Risk Management in Viticulture), and the Experimental Unit of the Domaine de Vassal (Montpellier). The IFV is another partner in the project. The Côtes du Rhône Union and the Domaine du Chapitre are also associated.


  • Action 1 : Factors of vine tolerance to the fungi associated with dieback
  • Action 2 : Factors of fungi aggressiveness associated with dieback
  • Action 3 : Development of selection and vineyard monitoring tools


The project runs from January 2018 to June 2021.

Jean-Pierre Péros
Grape trunk disease