This paper investigates the relative resistance of three different oxine copper formulations (oil-borne, water-borne, water-borne with pH-adjustment) as a preservative treatment for wood against brown-rot fungi. Impregnated southern pine sapwood cubes were exposed to R. placenta and G. trabeum cultures in a soil-block test. After eight weeks, the weight losses of the cubes were examined in relation to the retention of the preservative in the cubes. The results suggested that all of the formulations were effective in preventing decay at retention values near the previously reported toxic thresholds and that there was little difference between the water borne and solvent borne systems.

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