In order to evaluate resistance of sainfoin (Onobrychis viciifolia) powdery mildew, seeds 19 accessions were collected from different parts Iran and sown at 4 locations, i.e. Kheirabad, Khoramabad, Semirom Tabriz, in 2014. Accessions evaluated for mildew severity index (DSI), forage dry matter yield (DM), digestibility (DMD) crude protein (CP) water soluble carbohydrate (WSC) concentrations ove...