MUSHROOMSOïdium de l'alliaireErysiphe alliariicolaMushrooms5 imagesAssisted identification only. Never eat anything without an expert’s confirmation.Fungus.There is 1 observation of Oïdium de l'alliaire in Québec, mostly in Estrie, and it has been reported in 1 of the 17 regions.Where to see itEstrie1