A new fungicide combination for prevention of kiln brown stain of white pine

Eastern white pine often develops a surface brown non-microbial stain when kiln-dried. Such stain downgrades high quality lumber and is likely to occur when fresh, unseasoned lumber is stacked during warm weather prior to kiln-drying. Use of chemical reducing agents or pH alteration have been succes...

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Bibliographic Details
Published in:Forest products journal 2002-11, Vol.52 (11-12), p.51-52
Main Authors: SCHMIDT, Elmer L, HIGHLEY, Terry L, FREEMAN, Michael H
Format: Article
Language:English
Subjects:
Applied sciences
Chemicals
Degradation and preservation
Exact sciences and technology
Forest products
Forest products industry
Fungicides
Mold
Oxidation
Pesticides
Polymer industry, paints, wood
Polymerization
Product testing
Schedules
Sodium
Statistical data
Wood
Wood preservatives
Wood products
Wood. Paper. Non wovens
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Summary:Eastern white pine often develops a surface brown non-microbial stain when kiln-dried. Such stain downgrades high quality lumber and is likely to occur when fresh, unseasoned lumber is stacked during warm weather prior to kiln-drying. Use of chemical reducing agents or pH alteration have been successful control agents, but may have some practical limitations for general use. A new combination of fungicides (chlorothalonil and methylene bisthiocynate) was tested for ability to also control brown stain in pine lumber by a short dip treatment of green lumber. The results from two independent laboratories indicated that the new formulation was more effective than sodium thiosulfate, and similar in performance to sodium azide. This co-biocide system should provide the white pine lumber industry with both sapstain and brown stain protection.
ISSN:0015-7473
2376-9637