Laboratory and Field Studies on the Efficacy of Micronized CopperAzole (MCA) Preservative

摘要

Various laboratory and field trials on the efficacy of micronized copper azole (MCA) against decay termites were conducted. In a laboratory fungal cellar test, MCA treated stakes at retentions of 1.7 kg/m3 and 3.3 kg/m3 showed ratings of 9.5 or higher after 30 months exposure while untreated stakes had several failures and an average rating of 4.3. In a laboratory soil block test against four brown rot and two white rot fungi, MCA performed similar to solubilized copper azole (SCA) system and betterthan CCA.Results of an AWPA Standard E-l termite test showed that MCA performed comparable to alkaline copper quat (ACQ-D) system. In addition, MCA also demonstrated excellent long-term field efficacy againstwood destroying fungi and insects as shown in a 57-month ground contact stake test in Hawaii and in a 60-month ground contact stake test in Gainesville, FL.