BIOLOGICAL RESISTANCE OF THERMALLY TREATED Corymbia citriodora  (Hook.) K.D. Hill & L.A.S. Johnson E Pinus taeda L. WOODS AGAINST XYLOPHAGOUS TERMITES

Juarez   Benigno Paes; Pedro   Gutemberg de Alcântara Segundinho; Allan Ewerton   Rezende Euflosino; Márcio Rogério  da Silva; Carlito   Calil Junior; André Luis   Christoforo

BIOLOGICAL RESISTANCE OF THERMALLY TREATED Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson E Pinus taeda L. WOODS AGAINST XYLOPHAGOUS TERMITES

Autores

Juarez Benigno Paes

Pedro Gutemberg de Alcântara Segundinho

Allan Ewerton Rezende Euflosino

Márcio Rogério da Silva

Carlito Calil Junior

André Luis Christoforo

Editor

Universidade Federal de Viçosa

Descripción

This research aimed to evaluate the effect of the thermal-treated temperature to improvement of Corymbia citriodora and Pinus taeda wood resistance to the xylophagous termite Nasutitermes corniger, into forced feeding assay. The wood thermally treated was performed at temperatures of 160, 180, 200, 220, 240°C. For Pinus taeda, the temperature of 260°C was also used. Three boards of 6 × 16 × 56 cm (thickness × width x length) were used for each temperature. After being thermally treated, the boards were transformed into samples of 2.54 × 2.54 × 0.64 cm (longitudinal × radial × tangential). The experiment was kept in a climatized room (25 ± 2°C and 65 ± 5% of relative humidity), for 28 days. For Corymbia citriodora, the thermal treatment at 220 and 240°C improved the resistance to the termite. For Pinus taeda, the resistance improvement occurred at 240 and 260°C. The temperature of 160°C caused a decrease in the natural durability of both species.