Behavior of the Brown-rot Fungus Gloeophyllum trabeum on Thermally-modified Eucalyptus grandis Wood

Ano: 2013 | Volume: 20 | Número: 3

Autores: Fred Willians Calonego, Meire Cristina Nogueira de Andrade, Djanira Rodrigues Negrão, Cinthia Dias Rocha, Marli Teixeira de Almeida Minhoni, João Vicente Latorraca, Elias Taylor Durgante Severo

Palavras-chave: decay resistance, G. trabeum, heat-treated wood, eucalypts, rot fungi.

Resumo Português:

In this study, we aimed evaluate the behavior of the brown-rot fungus Gloeophylum trabeum and
white-rot fungus Pycnoporus sanguineus on thermally-modified Eucalyptus grandis wood. To
this end, boards from five-year-eleven-month-old E. grandis trees, taken from the Duratex-SA
company stock, were thermally-modified between 180 °C and 220 °C in the Laboratory of Wood
Drying and Preservation at Universidade Estadual Paulista - UNESP, Botucatu, Sao Paulo state
Brazil. Samples of each treatment were tested according to the ASTM D-2017 (2008) technical
norm. The accelerated decay caused by the brown-rot fungus G. trabeum was compared with
the decay caused by the white-rot fungus P. sanguineus, studied by Calonego et al. (2010). The
results showed that (1) brown-rot fungus caused greater decay than white-rot fungus; and (2)
the increase in temperature from 180 to 220 °C caused reductions between 28.2% and 70.0% in
the weight loss of E. grandis samples incubated with G. trabeum.