Potential toxicants for controlling soft rot in preservative treated hardwoods. Part 4: Evaluation of combined diffusion and toxicity

IRG/WP 2129

E W B Da Costa, O Collett

A large number of inorganic and organic preservatives were evaluated as potential soft rot control chemicals, by their degree of inhibition of fungal growth after allowing them to diffuse through a 6 mm thick wood slab. The tests were inoculated with wood powder from soft-rotted CCA treated poles. Pentachlorophenol was unable to diffuse quickly through the wood slab, although formulations with hexylene glycol showed some promise. Hydroxyisoxazole gave good results as did a number of other organic materials including "Busan 30", "Busan 52", "Permapruf T", sodium oxinate, sodium trichlorophenate, "Gloquat C", ā€˛Hyamine 1622", butyl icinol, and the commercial bandage materials "Osmoplast" and "Wolman pole bandage". Of the inorganic materials tested, good results were obtained with "Basilit BFB", with other Cu-F-B formulations including "Blue 7", and with fluoroborate and fluorosilicate preparations in general. Arsenates also showed some promise.


Keywords: POLES; REMEDIAL TREATMENTS; SOFT ROT; TESTING; TOXICITY; DECAY; DIFFUSION; HARDWOODS; NEW FORMULATIONS; BUTYL ICINOL; OSMOPLAST; CFB; FLUOROBORATES; FLUOROSILICATES; ARSENATES; GLOQUAT C; PCP; HEXYLENE GLYCOL; HYDROXYISOXAZOLE; SODIUM OXINATE; SODIUM TRICHLOROPHENATE; BUSAN 30; CCA


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