Mildiou de la pomme de terre : une approche systémique

Une présentation réalisée à l’occasion d’un séminaire organisé le 25 novembre 2014 à Courtrai par le CRAw et la FIWAP avec le soutien de l’APAQw.

Systemic analysis of the mildew issue in the Belgian potato system

Mémoire de  Simon Yzerbyt

Potato late blight caused by the oomycete Phtyophthora infestans (Mont.) de Bary may be the best known, longest studied and still amongst the most destructive of all plant diseases. Today, late blight is mostly controlled by the preventive use of fungicides, which has serious ecological consequences. As resistance against these fungicides increases in P. infestans populations, the number of necessary applications to fight the plague grows over time, reinforcing these ecological effects. At the same time, public opinion and societal pressure creates an additional pressure on the production system and the European agricultural policies tend to reduce the use of fungicides and pesticides.

Our objective is to explore a series of alternatives that meet the requirement of rendering the management of potato late blight more sustainable in a near future. The study relies on a systemic and qualitative approach, based on twenty-two semi-directed interviews with various types of actors of the system. The emphasis is on the point of view of the actors with respect to current and future management of potato late blight in the Belgian potato system. The collected data provide a clear view of the different ways of struggle that the actors know and/or use against late blight and offer a critical comparison of their different visions regarding the solutions to the issue and the barriers that prevent their implementation. Continuer la lecture de « Mildiou de la pomme de terre : une approche systémique »