Abstract: The blister rust on Pinus koraieusis has been identified as Cronartium ribicola J. C. Fischer ex Rabenhorst. Under natural and artificial condition, the telial stage of the pathogen have found on Pedicularis resupinata, P. resupinata var. ramosa, P. spirata, and Ribes mandshuricum in North-eastern China. By artificial inoculation, the pathogon also infected another three Ribes species.