EFFICIENCY OF IMPREGNATION WITH SALT SOLUTIONS IN THE RESISTANCE OF Corymbia torelliana AND Eucalyptus cloeziana WOODS TO DECAY FUNGY Postia placenta

Resumo

The research aimed to evaluate the efficiency of salt solutions (sodium chloride, lithium chloride, sodium carbonate, magnesium sulfate, zinc sulfate, and cupric sulphate = copper sulphate II) impregnated in the woods of Corymbia torelliana and Eucalyptus cloeziana on biological resistance to fungy of brown rot (Postia placenta) under laboratory conditions. From each species were taken samples of 2.0 x 2.0 x 3.0 cm (tangential x radial x longitudinal), over the large planks in the heartwood region on base-top direction. The samples were impregnated with 5% concentration of solutions and submitted for 16 weeks to the Postia placenta fungy under laboratory conditions. The wood of Eucalyptus cloeziana was more resistant to decay than Corymbia torelliana, both impregnated with salt solutions as not impregnated (natural). The treatments with saline solutions were satisfactory as regards resistance of wood degradation, being classified as very resistant, serving as a parameter for the evaluation of the wood, the xylophagous tested fungy.