Identification of new phytosanitary problems on crops of temperate or warm areas, and advice for control. Characterisation of fungicide sensitivity and virulence spectrum of phytopathogenic fungi. Experiments on new ways of transfer of results from research to the farm. Diffusion of tools for decision making and reference laboratory for phytosanitary analyses. Particular activities: coordination of advice for disease protection of winter wheat and crop protection extension for vegetable crops in the Walloon Region, characterisation of poplar rusts, potato tuber diseases, fusarium head rot on wheat, crown rot fungi on banana.