Bioassay to Determine Penetration and Efficacy of a Wood Preservative Applied By Soak Treatment

A bioassay with decay fungi was performed by means of the soil-block method in an attempt to demonstrate the distribution of a fungicide at levels effective in preventing attack by decay fungi. The fungicide, a proprietary, water-soluble, formulation of copper-8-quinolinolate, was applied by a cold-soak process to shakes manufactured from incense cedar and redwood sapwood. The fungicide was prepared in a formulation to promote diffusion at ambient pressure and temperature and since substantial penetration was achieved, it appears likely that changes in formulation or treatment schedule can provide sufficient additional penetration to assure adequate protection of sapwood in incense-cedar or redwood shakes by a non-pressure process. The question of permanence of the treatment under leaching exposure was not examined.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member