By applying a modified agar-block method, a comparative analysis was made on the toxic value of the wood preservative CCA against the test fungus Serpula lacrymans. The procedure applied to determine the results accounted for different standards: EN (Toxic limit), ASTM (threshold retention), GOST (threshold retention and protection probability), PN (toxic doses) and JIS (value of efficiency). Despite some procedural differences the results obtained were to a large extent similar.

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