Termite resistance of DMDHEU-treated wood |
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Authors: | H Militz S Schaffert B C Peters C J Fitzgerald |
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Institution: | 1.Wood Biology and Wood Products,Georg-August-University G?ttingen,G?ttingen,Germany;2.BASF AG,Ludwigshafen,Germany;3.Department of Primary Industries and Fisheries,Indooroopilly,Australia |
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Abstract: | Four field trials were conducted with wood modified with dimethyloldihydroxy-ethyleneurea (DMDHEU) in contact with subterranean
termites. Trials 1 to 3 were conducted with Coptotermes acinaciformis (Froggatt); 1 and 2 in south-east Queensland, and 3 in northern Queensland, Australia. Trial 4 was conducted in northern
Queensland with Mastotermes darwiniensis (Froggatt). Four timber species (Scots pine, beech, Slash pine and Spotted gum) and two levels (1.3 M and 2.3 M) of DMDHEU
were used. The tests were validated. DMDHEU successfully prevented damage by C.
acinaciformis in south-east Queensland, but not in northern Queensland. It also did not protect the wood against M.
darwiniensis. Except for beech in trial 4, DMDHEU led to reduced mass losses caused by termite attack compared to the unmodified feeder
stakes. Slash pine (in trials 1 and 3) and Spotted gum (in trial 1) presented low mass losses. Modification of Scots pine
was more effective against termite damage than the modification of beech. |
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