This report contains results of investigations aimed at: a) determination of the effect of the kind of substrate and species of test fungus on quantitative changes in used samples prepared from spruce cardboard, and b) comparison of the threshold fungicidal values of come fungicides determined with accelerated method, with values obtained by block method. During performed investigations, the method described in Document No.: IRG/WP/262 was used. Assesment of decomposition degree was based on the loss of weight and amount of NaOH consumption by the substrate.

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