Hwang Won-Joung, Kartal S Nami, Yoshimura Tsuyoshi, Imamura Yuji
Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Uji 611-0011, Kyoto, Japan.
Pest Manag Sci. 2007 Jan;63(1):90-5. doi: 10.1002/ps.1294.
This study evaluates the synergistic effect of wood extractives and quaternary ammonium compounds (QACs) on the resistance to termites of several treated wood species. Wood specimens from different natural durability classes were extracted with either hot water alone or hot water + ethanol/benzene. The extracted and unextracted wood specimens were treated with either didecyldimethylammonium tetrafluoroborate (DBF) or commercial didecyldimethylammonium chloride (DDAC) solutions and then exposed to subterranean termites, Coptotermes formosanus Shiraki, for 3 weeks under laboratory conditions. The results showed that extractives of the heartwood portions of the wood species contributed to increased resistance against termite attack in the presence of either DBF or DDAC wood preservatives. The synergistic effect of wood extractives and DBF was much clearer with Pseudotsuga menziesii (Mirbel) Franco and Tsuga heterophylla Sarg wood samples. Further studies are needed for a better understanding of the synergism between wood extractives and either DBF or DDAC using both the sapwood and heartwood portions of the same wood species.
本研究评估了木材提取物与季铵化合物（QACs）对几种经处理木材品种抗白蚁性能的协同效应。来自不同天然耐久性等级的木材样本，分别用单独热水或热水 + 乙醇/苯进行提取。提取和未提取的木材样本，分别用四氟硼酸二癸基二甲基铵（DBF）或商用二癸基二甲基氯化铵（DDAC）溶液处理，然后在实验室条件下暴露于地下白蚁（台湾乳白蚁）3周。结果表明，在存在DBF或DDAC木材防腐剂的情况下，木材品种心材部分的提取物有助于提高对白蚁攻击的抗性。对于花旗松和异叶铁杉木材样本，木材提取物与DBF的协同效应更为明显。需要进一步研究，以更好地了解使用同一木材品种的边材和心材部分时，木材提取物与DBF或DDAC之间的协同作用。
