Análise da eficiência do preservativo CCB na melhoria da resistência da madeira de algaroba (Prosopis juliflora (SW) D.C.) a organismos xilófagos.

Abstract

The main objective of research was to analyze the "Osmose CCB" preservative efficiency to improve the wood Prosopis juliflora (Sw) D.C. resistance to xylophage organisms. In order to attend the objectives proposed, round pieces of P. juliflora were treated by sap displaced method in 1; 2 and 3% of active ingredients of CCB solutions, by 3, 6, 9, 12 and 15 days. Wood disks were obtained in three positions (50 cm of base, middle of length and top of piece) in the treated pieces. The CCB penetration and retention were analyzed in these positions, as well as the resistance to Postia placenta fungus (accelerated laboratory test decay) and to termite Nasutiternes corniger (forced feeding and alimentary preference tests). In this research was observed a better penetration and retention in pieces submitted to 2% of CCB solutions. The CCB penetration and retention, as well as the resistance of treated wood, in general, decreased of base to top of pieces. The preservative treatment wood arise high resistance to fungus and termite (forced feeding assay). In the fungus and termite tests the wood resistance was influenced by solutions concentration and treatment time. In forced feeding assay the pieces submitted to 2% CCB solution, by 12 and 15 days presented better performance. The treated wood submitted to alimentary preference assay showed different behavior of others assays. In this case, the best performance was obtained by wood submitted to 1% CCB solution.