Abstract
) and red maple (Acer rubrum) cubes were pressure treated with copper ethanolamine followed by sodium dimethyldithiocarbamate (SDDC) with elemental copper retention levels varying from 0.8 kg/m3 to 8 kg/m3. The decay resistance was determined using a laboratory soil block test with pure fungus culture according to modified AWPA standard E10-91. A 4.0 kg/m3 elemental copper retention was sufficient to protect treated samples against Gleoephyllum trabeum, Pleurotus ostreatus, Trametes versicolor, Irpex lacteus, and Chaetomium globosum. But higher elemental copper retention (4.5 to 5 kg/m3) was needed for protection against the copper tolerant brown rot Poria placenta.
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