MUSHROOMSPeony Powdery MildewErysiphe paeoniaeMushrooms5 imagesAssisted identification only. Never eat anything without an expert’s confirmation.Fungus.There are 6 observations of Peony Powdery Mildew in Québec, mostly in Montréal, and it has been reported in 1 of the 17 regions.Where to see itMontréal6Similar speciesOïdium de la renouéeErysiphe polygoni