This document (in French) aims to:
1) present the elements of a preventive strategy for delaying resistance selection,
2) describe the status of resistance in 2018 against the main families of registered active ingredients in the populations of Plasmopara viticola (downy mildew agent), Erysiphe necator (powdery mildew agent), Botrytis cinerea (grey rot agent) and Guignardia bidwellii (black-rot agent)
3) to establish general recommendations regarding these resistances in order to reduce and optimize fungicide treatments.
Have a good reading, and good adaptation of your practices!