Resistance of Azadirachta indica Wood to Wood-Eating Fungi Under Laboratory Conditions
Chromated Copper Arsenate (CCA), xylophagous organisms, wood preservation
This study aimed to evaluate the resistance of Azadirachta indica (Neem) wood to attack by wood-decaying fungi under laboratory conditions, comparing wood treated with and untreated with CCA (chromated copper arsenate), and using Eucalyptus sp. as a reference. Cubic samples were subjected to the action of five decay fungi: Gloeophyllum trabeum, Rhodonia placenta, Trametes versicolor, Irpex lacteus, and Serpula lacrymans. The test followed the AWPA E10-16 standard, with exposure for 12 weeks in a controlled environment. Weight loss (%) was the criterion for classifying resistance. The results demonstrated that CCA treatment was highly effective, resulting in weight losses of less than 2% and classification as "highly resistant" for all treated samples. Untreated samples, however, showed greater losses, especially against the fungi G. trabeum and R. placenta. Untreated Neem showed slight superiority over untreated Eucalyptus sp., which may be related to the presence of bioactive compounds in the wood.