Shellrot control in western redcedar: Potential replacements for pentachlorophenol spray

Sixteen chemicals or formulations, 15 of which were water-soluble solutions or water-dispersible emulsions, were evaluated as potential subsitutes for pentachlorophenol in diesel oil, which is sprayed on untreated western redcedar poles in service to control sapwood decay. Appraisals were made through trials on wood blocks treated in the laboratory and on poles treated in the field. Quantitative comparisons were made by determing weight losses among treated and untreated blocks exposed to a decay fungus and by Aspergillus bioassays. Several waterborne formulations were promising