The studies conducted in a growth chamber observed the protective effect of biopreparations such as Biosept 33 SL, Biochikol 020 PC and Polyversum, used as seed dressing for common bean and pea. The fungicide Zaprawa Oxafun T was used as a comparison, while the seeds that were not dressed constituted the control. The studied plants grew in the medium grown over with different species of fungi pathogenic towards pea and common bean. Irrespective of the species, the fewest plants, with the greatest proportion of infected ones, were obtained in control combinations. The application of biopreparations and the fungicide turned out to be an effective protection of pea and common bean from the infection by the examined phytopathogens. Biosept 33 SL in the concentration of 0.2% showed to have the best effect among the tested biopreparations.

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