Biocontrol potential of B. thuringiensis var. berliner (Kustom larvo WT-1 ml/pot), var. kurstaki (Kostar 76 LW-1 ml/pot), Saccharopolyspora spinosa (Treisr 480 EC-1 ml/pot), Fusarium spp. (1; 2; 4 g mycelium/pot) and Trichoderma spp. (1; 5; 10 g mycelium/pot) against G. rostochiensis on potato was examined in glasshouse. They were applied to the soil with the planting. All treatments improved the plant growth and yield of potatoes, being greatest with Kostar 76 LW.