Evaluation of the Fungitoxic Effect of Extracts from the Bark of <i>Quercus laeta</i> Liebm, the Cob of <i>Zea mays</i> and the Leaves of <i>Agave tequilana</i> Weber Blue Variety against <i>Trametes versicolor</i> L. Ex Fr

Abstract

Wood products used in outdoor applications can be degraded by xylophage organisms. For this reason, such products require treatments based on biocides in order to delay their service life. This brings troubles of its own due to the inherent toxicity of these treatments towards humans and the environment. Therefore, it is imperative to find less-toxic natural preservatives. In this context, this work deals with the evaluation of the fungitoxic effect of raw extracts obtained from three types of agroindustrial waste materials: bark of Quercus laeta spp., the cob of Zea mays, and the leaves of Agave tequilana Weber Blue variety. Extracts were incorporated into the test wood Alnus acuminata (Aile wood) via a full-cell process. Bark extracts provided excellent protection against the attack of Trametes versicolor (L. ex. Fr.) Pilát, improving the decay resistance of Aile wood from being nonresistant to resistant. Also, bark extracts from Q. laeta showed less leaching than the other extracts.

Keywords

• xylophagous fungi
• extracts
• natural preservatives
• soil/block method
• wood impregnation