Physiological properties of fungal test strains according to the European Standard EN 113
E Graf, B Zgraggen, P Manser
For the discussion of the European standard EN 113 the EMPA's procedure of culturing the test fungi and the corresponding virulence of the test fungi as well as the wood moisture content at the end of the test are shown. It is mainly shown that within the standard the choice of the solvent may not be left at the test lab if reproducible results shall be obtained. The different solvents influence in different form the wood decomposition values due to fungal attack. A water leaching of the wood specimen impregnated with solvents generally Further increases the negative effect of the solvent on the fungi. It is therefore the task of the Technical Committee of the European Committee for Standardization (CEN/TC3B) to agree to a standard solvent and to evaluate this in the original state as well as after a leaching followed by uniform drying periods by means of an interlaboratory test.