Comparative performance of several ammoniacal copper preservative systems

IRG/WP 97-30151

D D Nicholas, T Schultz

The efficacy of several ammoniacal copper-based wood preservative systems was evaluated in this study. The selection of potential co-biocides was based on the results of an agar plate test. Following this, the most promising systems were evaluated in a standard field stake test. Good correlation was found between the agar plate and field stake test results. Of the preservative systems tested, copper/tribromophenol, copper/naphthenic acid, copper/DDAC, and copper/propiconizole were found to be superior against copper tolerant fungi in comparison to the other systems tested after three years of field ground-contact exposure. The performance of copper/benzoic acid was mediocre. Copper/citric acid was ineffective against copper-tolerant fungi, with its performance being no better than copper alone.


Keywords: COPPER; PRESERVATIVES; DECAY TEST; POSTIA PLACENTA; COPPER TOLERANT FUNGI

Conference: 97-05-25/30 Whistler, British Columbia, Canada


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