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Termite resistance and wood-penetrability of chemically modified tannin and tannin-copper complexes as wood preservatives
Journal of Wood Science volume 48, pages 331–337 (2002)
Abstract
We examined the ability of chemically modified tannin and tannin-copper complexes to penetrate wood and the ability of the treated wood to resist termites. Only the tannin-treated wood retained the agents after treatment. Wood with untreated mimosa tannin (MT) retained the least amount, followed by wood with resorcinolated tannin (RMT) and that with catecholated tannin (CMT). When RMT or CMT was mixed with ammonia-copper, the wood retained twice as much of these solutions as the MT -ammonia-copper solution. The degree of retention of RMT-NH3-Cu and CMT-NH3-Cu ranged from 268 to 326kg/m3. The solutions penetrated 2–13 mm from the tangential sections of the logs. We also measured the termite resistance conferred by these solutions. Most of the tannin-NH3-Cu solutions showed contact lethality for termites in the contact toxicity test. However, the termites were fed cellulose treated with those solutions and most survived the oral toxicity test (14 days). Moreover, these solutions reduced the amount of damage to the wood by termites. However, the mortality rate of the termites during the eating-damage test (>21 days) did not reach 100% for any of the solutions except for RMT. As a result of the field stake test with the same log's used for the penetrability test, the mass loss of wood treated with RMT or CMT alone or with RMT + NH3 + CuCl2, was about one-third to one-half that of the controls. Because these solutions have good wood penetrability and good termite resistance, they have potential use as low-toxicity wood preservatives.
References
Laks Peter E, McKaig PA, Hemingway RW (1998) Flavonoid biocides: wood preservatives based on condensed tannins. Holzforschung 42:299–306
Ohmura W, Doi S, Aoyama M, Ohara S (1999) Components of steamed and non-steamed Japanese larch [Larix leptolepis (Sieb. et Zucc.)] heartwood affecting the feeding behavior of the subterranean termite,Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae). Holzforschung 53:569–574
Ohmura W, Doi S, Aoyama M, Ohara S (2000) Antifeedant activity of flavonoids and related compounds against the subterranean termiteCoptotermes formosanus Shiraki. J Wood Sci 46:149–153
Yamaguchi H, Okuda K (1998) Chemically modified tannin and tannin — copper complexes as wood preservatives. Holzforschung 52:596–602
Yamaguchi H, Okamura T (1995) Environmental safeguards and wood preservatives: utilization of tannin — metal complex (in Japanese). Wood Ind (Mokuzai Kougyo) 50:155–159
Matsuoka S, Amemiya S (1973) Wood industry handbook (in Japanese): Experimental Forestry Station, Ministry of Agriculture and Forestry. Maruzen, Tokyo, p 799
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An erratum to this article is available at 10.1007/BF00770710.
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Yamaguchi, H., Yoshino, K. & Kido, A. Termite resistance and wood-penetrability of chemically modified tannin and tannin-copper complexes as wood preservatives. J Wood Sci 48, 331–337 (2002). https://doi.org/10.1007/BF00831356
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DOI: https://doi.org/10.1007/BF00831356