Efficacy of some fungicides against mold on freshly cut beech sawn wood

IRG/WP 06-30403

A Fojutowski, A Kropacz

The quality class of molded wood is lowered and this can result in financial losses due a decrease in its trade value. Currently beech wood is often used without steaming it first and it moulds in the course of drying. The aim of this study was to identify kinetics of beech wood molding and effectiveness of action of chosen modern pro-ecological wood preservatives applied in the protection of freshly cut beech sawn wood together with assessment of these agents influence on wood color. Beech wood taken from 54-year old trees was tested. In the tests mixtures of the following pure fungi cultures: Aspergillus niger, Aspergillus amstelodami, Paecilomyces varioti, Trichoderma sp., Penicillium brevi-compactum were used. Head parts or the whole surface of samples were infected with a water mixture of spores. It was noted that infecting a part of samples’ surface offers greater chances of observation of mould coverage growth on wood surface. However, assessment of fungi linear growth on the surface was not fully possible – after a few days (6-7) almost all the observed surface (around 90%) became covered with mould. Protective action against molding of beech wood of the following agents: E (carbendazym+prochloraz), F (alkali activated benzalkonium chloride), P (QAC+copper nitrate) and PCPNa (sodium pentachlorphenolate) – as a model agent, was tested acc. to NWPC 1.4.1.3./79 method. The highest efficacy, although lower than this of the model agent PCPNa, was recorded in the case of agent E-carbendazym+prochloraz, solutions. The greatest changes in wood color were caused by agent F- alkali activated benzalkonium chloride.


Keywords: mould, fungi, beech wood, preservatives, effectiveness

Conference: 06-06-18/22 Tromsoe, Norway


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