Susceptibility of 18 winter wheat (Triticum aestivum L.) cultivars to damage by Deroceras reticulatum (O. F. Müll.) and Arion lusitanicus Mabille was estimated in laboratory conditions. For each slug species six experiments, two with seeds, two with seedlings at stage 07–12 BBCH and two with seedlings at stage 10–13 BBCH, were performed. The susceptibility to feeding of the two slug species differed between the cultivars; the two slugs differed in their preferences to some of the cultivars. The Nadobna cultivar was the most severely damaged by both species. The cultivars Jawa and Nutka were the least damaged by D. reticulatum and A. lusitanicus, respectively.