Abstract
Abstract A weather-protected aboveground field test was established at Kincardine, Ontario, Canada, to assess the performance against termites of two formulations of carbon-based preservative in Pacific silver fir (Abies amabilis) and white spruce (Picea glauca). A naturally durable untreated reference species was also included. The boards were visually inspected for decay and termite attack after 6 years. Termite attack was negligible, but the test material was challenged by Coniophora olivacea, a soil-inhabiting, strand-forming, brown-rot fungus. While decay was well advanced in some untreated controls and western red cedar (Thuja plicata) reference samples, treated samples that had been similarly challenged remained in excellent condition.
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