The aim of the study was to compare the occurrence intensity of fungal diseases on leaves, ears and the stem base of spring triticale in pure and mixed sowing grown using the conventional and organic method in mountain conditions of the Beskid Niski. The research was carried out in the years 2013-2014 at the Mountain Experimental Station) located in Czyrna Niżna, located in the western part of the Beskid Niski. The research carried out showed differences in the intensity of occurrence of fungal diseases of spring triticale. Spring triticale cultivated using the organic method, in all zones of the slope, was characterised by a significant increase in the occurrence intensity of leaf and ear blight, rynchosporium disease (R. secalis) and fusarium ears blight (Fusarium spp.). At the same time, in this management system there was a decrease in the intensity of sharp eyespot (R. cerealis) - base disease. In the existing natural conditions, the cultivation of spring triticale in a twospecies mixture with oat in the lower and middle slopes with a slope of 10 and 12.6% significantly reduced the severity of ear diseases: fusarium ear blight (Fusarium spp.) and ear blight (S. nodorum.).