Trials on the Efficacy of Micronized Copper in Australia

Alkaline copper quat (ACQ) is an established wood preservative that is formulated with solubilized copper in amine solvent. This article describes three separate trials in Australia that investigated whether substituting soluble copper with micronized copper affects performance. ACQ and micronized c...

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Bibliographic Details
Published in:Forest products journal 2010-01, Vol.60 (1), p.6-12
Main Authors: Cookson, L.J, Creffield, J.W, McCarthy, K.J, Scown, D.K
Format: Article
Language:English
Subjects:
Analysis
Bioassays
Control
Copper
Forest products
Forest products industry
Forest soils
Fungi
Impact analysis
Loam soils
Solvents
Studies
Termites
Wood preservatives
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Summary:Alkaline copper quat (ACQ) is an established wood preservative that is formulated with solubilized copper in amine solvent. This article describes three separate trials in Australia that investigated whether substituting soluble copper with micronized copper affects performance. ACQ and micronized copper quat (MCQ) performed similarly in Pinus radiata against four brown-rot fungi in a soil-block bioassay, while MCQ performed slightly better against two white-rot fungi in Eucalyptus delegatensis . A 2.3-year in-ground stake trial in the wet tropics at Innisfail also found that ACQ and MCQ performed comparably in P. radiata and Corymbia maculata . This was a severe test site with attack caused by soft-rot fungi, white-rot fungi, and termites. An H3 (outside, aboveground) field test against termites in Darwin showed that ACQ- or MCQ-treated P. radiata and C. maculata performed similarly against Coptotermes acinaciformis and Mastotermes darwiniensis . These trials demonstrated that MCQ performs comparably to ACQ under the test conditions used.
ISSN:0015-7473
2376-9637
DOI:10.13073/0015-7473-60.1.6