Efeito do extrato da fibra de piaçava (leopoldinia piassaba wallace), na durabilidade da madeira de marupá (simarouba amara aubl.) Contra ação de fungos xilófagos

Abstract

Wood has always been present in people's lives, being used as a raw material for the most diverse purposes, due to its intrinsic properties. In addition, it is a renewable material, which differentiates it from other materials. Taking into account that wood can be deteriorated by xylophagous agents, research using plant extracts to develop alternatives to conventional wood preservatives should be studied. In this context, plant extracts combined with solvents may have a positive performance against the action of organisms. This study aimed to evaluate the resistance of Simarouba amara wood, impregnated with extractives of Leopolnidia piassaba fiber and subjected to white rot and brown rot fungi. For this purpose, the characterization of the fiber was carried out in terms of moisture, extractive, ash and lignin contents and the retention of impregnations in the samples of S. amara. A fungal inhibition test was carried out against the fungus Gloeophyllum trabeum and later the resistance test of wood from S. amara treated with the extracts against the fungi Pycnoporus sanguineus and G. trabeum. It was observed that L. piassaba fiber has a high lignin content (54.26%) and low ash content (0.54%). In the resistance test, fungus P. sanguineus, at concentrations of 2 and 4%, showed an increase in wood resistance. The treatment of 4% differed significantly from the control, showing a tendency to inhibit the fungus P. sanguineus, in the period of 6 wee.