EN
Problems regarding potato protection in organic cropping system presented in this paper are based on the literature and authors' own research. Potato is considered as a difficult species in organic farming system due to a threat presented by pests (i.e. fungal, bacterial and viral pathogens, nematodes and Colorado potato beetle). The standards of organic farming limit the number of plant protection products being accepted to use. The producers are forced to applying biological and agricultural methods to larger extend. Particular attention should be paid to the selection of varieties resistant to pathogens and use of certified healthy seed potatoes (germinated or at least stimulated). Crop rotation is still the basic plant protection method in ecological farming. Plant protection against late blight is difficult and the best result can be obtained while using potato varieties of short growing season. In seed production there are additional rules that should be applied. In regions with high virus pressure the varieties sensitive to virus infections should not be reproduced. List of Agricultural Varieties contains many potato varieties of high resistance to the most important economically virus of potato crops - PVY. Growing of resistant varieties in sound crop rotation is the cheapest and most eff ective method to controlling potato golden nematodes (PGN). In 2002 the number of PGN resistant potato varieties amounted to 66% of the total varieties included in the List of Agricultural Varieties.