Abstract

Wood treatments based on oleoresins from Aucoumea Klaineana, Canarium schweinfurthii and Dacryodes edulis have shown interesting anti-termites properties but poor resistance to fungi and leaching. Oleoresins were combined with tebuconazole to produce both antifungal and anti-termite wood preservatives formulations with an expected better fixation of chemicals mixtures in the wood. Beech and Scots pine wood block samples were impregnated by these different formulations and exposed to white and brown rot, respectively, as well as to European termite (Reticulitermes flavipes). The use of aqueous formulations of each oleoresin of combined to tebuconazole improved the wood resistance against termites and mainly brown rot. In addition, the best formulation was found by using the raw resin from Aucoumea Klaineana. These results are mainly due to the antifungal activity of tebuconazole. In addition, the presence of antioxidant chemicals in the wood resins inhibits the wood decay fungi growth and acts as enzyme and metabolism inhibitors disturbing the treated wood digestion process by termites. For the future, the promising protection obtained should be formulated to be resistant to leaching.

摘要

基于来自Aucoumea Klaineana、Canarium schweinfurthii和Dacryodes edulis的油树脂的木材处理剂已显示出有趣的抗白蚁特性，但对真菌和浸出的抵抗力较差。油性树脂与戊唑醇结合生产抗真菌和抗白蚁木材防腐剂配方，预期能更好地固定木材中的化学混合物。山毛榉和欧洲赤松木块样品用这些不同的配方浸渍，并分别暴露于白腐和褐腐病以及欧洲白蚁（Reticulitermes flavipes). 使用与戊唑醇组合的每种油性树脂的水性制剂提高了木材对白蚁和主要是褐腐病的抗性。此外，通过使用来自Aucoumea Klaineana的原料树脂找到了最佳配方。这些结果主要是由于戊唑醇的抗真菌活性。此外，木材树脂中存在的抗氧化化学物质会抑制木材腐烂真菌的生长，并作为酶和新陈代谢抑制剂干扰白蚁对处理过的木材的消化过程。对于未来，所获得的有前途的保护应该被配制成抗浸出的。