EN
The aim of the study was to determine susceptibility of thirteen new maize hybrids to Fusarium spp. Ustilago zeae Unger. and Ostrinia nubilalis Hbn. The study was conducted at the Experimental Station Złotniki in 2009–2010. Thirteen new maize hybrids were taken into consideration: Sudoku, Bredero, Sunaro, Suzy, PR 39D23, PR 38A79, Mas 24.A, Es Titania, Pravor, Es Palazzo, Es Beatle, Mas 23.B, LG 32.16. The percentage of plants infected by U. zeae, Fusarium spp. and as wekas maize plants infected by O. nubilalis was highly influenced by the environmental conditions. The significantly largest number of plants infected by U. zeae was shown by medium-early hybrids Sunaro and Es Palazzo. The lowest level of susceptibility to U. zeae was revealed by varieties PR 39D23, 38A79 PR, Pravor, Es Beatle and Mas 23.B. Harmfulness of European corn borer was low. The damage of maize plants caused by caterpillars of this pest ranged from 0.6% to 4.9%. The percentage of plants infected by the fungi from Fusarium spp. causing foot-rot, ranged from 0 to 0.9%. The most susceptible to Fusarium spp. were the maize hybrids Pravor (FAO 230–240) and PR 39D23 (FAO 260) in 2009.