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Title: Field tests of the efficacy of zinc and fatty amine in preventing colonization by copper-tolerant fungi

Source: International Biodeterioration & Biodegradation 70(2012) 74-78

Author(s)Lebow, Stan; Woodward, Bessie; Halverson, Steven; West, Michael

Publication Year: 2012  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4723-3

Abstract: Ground-contact durability of stakes treated with acidic copper formulations was evaluated. All test formulations incorporated copper, dimethylcocoamine and propanoic acid; one set of formulations also included zinc. Sapwood stakes cut from the southern pine group were pressure-treated to a range of retentions with each formulation and placed into plots within Harrison Experimental Forest in Mississippi and compared with untreated stakes and chromated copper arsenate-treated stakes. Stakes were inspected and given a visual condition rating after 1, 2, 3, 4, 5, and 7 years. Most stakes at higher retentions remained in good condition after 7 years; sporadic failures occurred in all but the highest retention of the zinc formulation. The sporadic nature of fungal attack by a fungus thought to be a strain of Antrodia radiculosa indicates that failures were caused by copper-tolerant fungi. At the concentrations evaluated, neither the dimethylcocoamine nor the propanoic acid offered adequate protection against copper-tolerant fungi. Addition of zinc notably increased decay resistance, and absence of failures at the highest retention may indicate that zinc can help to protect against copper-tolerant fungi. However, the sporadic nature of copper tolerance makes this finding difficult to confirm. Inspection of theses stakes will continue.

Keywords: preservative; field tests; copper; zinc; fatty amine; copper tolerance

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 196 kb(s)

Date posted: 05/04/2012

This publication is also viewable on Treesearch:  view
RITS Product ID: 41994
Current FPL Scientist associated with this product
Lebow, Stan T.
Research Forest Products Technologist

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