Efficacy of azoxystrobin, dichlofluanid, imazalil, kresoxim-methyl, propiconazole and triforine (standard) in the control ofDiplocarpon rosae was evaluated in the years 1997-1999. The compounds were applied as a plant spray. First treatment of plants was performed when first disease symptoms occurred on leaves and spraying was repeated 9 times at weekly intervals. In the autumn of 1999 plants not previously treated with fungicides and showing visible disease symptoms were spraye and after one, 7 and 14 days diseased leaves were sampled. Spores from leaves were transferred onto Petri dishes with potato-dextrose agar. Number of germinating spores was counted after 24 h incubation (4 Petri dishes for each compounds). After 9-weeks protection of rose shrubs with the tested compounds the spread of mycelium on new leaves was strongly inhibited. Only bupirimate at concentration 0,05% gave very poor control of D. rosae. All other tested compounds were better or as good as triforine. Reduction of concentrations used resulted in lower effectiveness. After I, 7 or 14 days from the last spraying of plants with dichlofluanid, kresoxim-methyl and triforine germination of fungus spores was below 9% except kresoxim-methyl at concentration O.Ol% after 14 days (12.5%).

The influence of oilseed rape glucosinolates on the grown in vitro pathogenic fungi was studied. Two pathogenic to oilseed rape fungi species: Fusarium roseum and Rhizoctonia so/ani were taken into consideration. It was observed that glucosinolates added to the medium limited the growth of both tested fungi to some extent, especially when higher concentrations of glucosinolates was supplied.