The authors tested the fungicide effect of different biocides by the diffusion method. Its principle involves pipeting samples of the tested fungicide preparations into pits in an agar medium on Petri dishes. The agar is inoculated over the whole surface with spores of fungi. It is incubated at 28 °C for 2 to 3 days. The size of the inhibition zones in the increments of fungi round the pits with the preparation are recorded. The authors discuss the suitability of this method for different types of preparations with regard to the results they assembled.

        Key words: diffusion method – testing the effectiveness of biocides.