Decay susceptibility of Amazon wood species from Brazil against white rot and brown rot decay fungi

摘要

A total of 28 tropical Amazon woods - many of them rarely used - from Tapajos National Forest, Para state, Brazil, were tested for their natural resistance against the decay fungi: Ganoderma applanatum, Trametes versicol-or, Pycnoporus sanguineus, Meruliporia incrassata, and Gloeophyllum trabeum. The wood resistance classification was made according to the ASTM D 2017-81 method. High variability on susceptibility to wood decay fungi was found. Their mean weight losses varied from 0.6% to 45.6%. Highly resistant species include: Astronium gracile, Bagassa guianensis, Caryocar villosum, Claricia racemosa, Diplotropis purpurea, Dipteryx odorata, Hyme-naea courbaril, Manilkara huberi, Mezilaurus itauba, Sex-tonia rubra, Tabebuia incana, and Vatairea paraensis. The following wood species are less durable: Brosimum parinarioides, Jacaranda copaia, Laetia procera, Pouteria pachycarpa, Virola caducifolia, and Trattinnickia rhoifolia. Meruliporia incrassata caused extensive weight losses in most of the investigated Amazon wood species.