Accelerated laboratory testing of preservatives on 13 North American wood species

IRG/WP 99-30201

J J Morrell, C M Freitag

The ability of selected water and solvent based biocides to protect wood against fungal attack was evaluated on 13 North American wood species using 7 decay fungi in a modified soil block test. Most preservatives were capable of providing protection at their recommended above ground and soil contact use levels. Many decay fungi caused substantial weight losses on blocks treated with chlorothalonil, copper citrate or copper dimethyldithiocarbamate. Most other preservatives performed well against a majority of fungi, but were susceptible to one or two of the test isolates. Aspen was the most difficult of the 13 species to protect against fungal attack. The results illustrate the need to confirm performance of new wood preservatives on the range of wood species to which they will be applied prior to field use.


Keywords: SOIL BLOCK TESTS; WHITE ROT; BROWN ROT; WATERBORNE PRESERVATIVES; OILBORNE PRESERVATIVES; BIOCIDE RESISTANCE

Conference: 99-06-06/11 Rosenheim, Germany


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