ResumenEl objetivo del trabajo fue estudiar el comportamiento de la madera de Pinus taeda L. sin impregnar e impregnada con CCA tipo C, con retenciones de 5, 10 y 15 kg/m 3 , frente a la acción de los hongos xilófagos, Pycnoporus sanguineus, Laetiporus sulphureus, Plerotus sajor caju, Ganoderma applanatum, Glophyllum sp. en ensayos de laboratorio. Las maderas fueron obtenidas de seis árboles seleccionados al azar, e impregnadas con CCA en una autoclave de laboratorio. Para determinar la eficacia del preservante fueron utilizadas, 5 probetas de 3 x 1 x 0,5 cm por retención y por cepa de hongos y 5 de madera sin impregnar, testigo. Las probetass fueron puestas en ambiente de laboratorio para climatización y fueron pesadas. Los hongos fueron cultivados en tubos de ensayos de 20 mm de diámetro y 200 mm de largo, y sobre los mismos se colocaron las probetas, permaneciendo en estufa a 28 ºC por 12 semanas. Luego de este período las probetas fueron retiradas y puestas en ambiente de laboratorio, hasta obtener el contenido de humedad del inicio del ensayo. La degradación fue evaluada a través de la pérdida de peso. La madera de Pinus taeda L. fue moderadamente resistente con retenciones de 5 y 10 kg/m 3 de CCA, por lo tanto la retención de 5 kg/m 3 es suficiente. Palabras claves: Pinus taeda; CCA; durabilidad; hongos xilófagos. Abstract Durability of Pinus taeda L. wood, impregnated with chromated copper arsenate to the xylophagaus fungi action. Misiones, Argentina.The objective of this work was to study the behavior of Pinus taeda L. wood without and with impregnation with retentions of 5, 10 and 15 kg/m 3 of chromated copper arsenate, type C, preservative against Pycnoporus sanguineus, Laetiporus sulphureus, Plerotus sajor caju, Ganoderma applanatum, Glophyllum sp. in laboratory conditions. The wood was obtained from six trees chosen at random, and impregnated with C.C.A. in laboratory autoclave. To determine the efficiency of preservative 5 samples were used 5 samples of 3x 1 x 0,5 cm of no treated wood, were used. The wood samples were sterilized and put on a xylophagaus fungi staying in oven at 28°C for 12 weeks; after this period, the samples were taken away and put on a laboratory environment, until the moisture content of the beginning of the experiment was attained. The degradation was evaluated through the weight loss. The Pinus taeda L. wood was moderately resistant with retentions of 5 and 10 kg/m 3 of CCA, therefore retention of 5 kg/m 3 is enough.
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