Biological effectiveness of ground-contact wood preservatives as determined by field exposure stake tests
W E Conradie, A Pizzi
Field exposure tests conducted on stakes treated with different creosotes, mixtures of creosote and waxy oil as well as different CCA wood preservatives over a period of 25 years, gave the following results: The CCA preservatives provided excellent biological protection to treated stakes, especially against fungal attack. The CCA Type I, currently approved for use under South African conditions is not inferior to the CCA Type II during long-term ground-contact exposure if the active elemental contents and effective retentions are taken into consideration. The creosotes provided good protection against termite attack but showed fairly poor fungal resistance during long-term ground-contact exposure under wet conditions. The addition of waxy oil greatly improved the effectiveness of creosotes against fungal attack. The CCA preservatives proved to be a better overall ground-contact preservative compared with the creosotes.
Keywords: FIELD TEST; STAKES; CCA; CREOSOTE; CREOSOTE ADDITIVES; SAKRESOTE 100; WAXY OIL; RESISTANCE; FUNGI; TERMITES; PIENAARS RIVER; SOUTH AFRICA
Conference: 84-05-28...06-01 Ronneby Brunn, Sweden