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Antifungal and antitermitic activities of wood vinegar from oil palm trunk
- Oramahi, Hasan Ashari, Yoshimura, Tsuyoshi, Diba, Farah, Setyawati, Dina, Nurhaida,
- Journal of wood science 2018 v.64 no.3 pp. 311-317
- Coptotermes formosanus, Coriolus versicolor, Elaeis guineensis, Fomitopsis palustris, antifungal properties, bioassays, brown-rot fungi, growth retardation, mortality, pyrolysis, temperature, vinegars, white-rot fungi, wood
- We evaluated the antifungal and antitermite activities of wood vinegars produced from oil palm trunk. The wood vinegars were produced at three different pyrolysis temperatures, 350, 400, and 450 °C. Antifungal activities of vinegars were evaluated using a Petri dish bioassay with 0.5, 1.0, and 1.5% (v/v) against a white-rot fungus, Trametes versicolor, and a brown-rot fungus, Fomitopsis palustris. Antitermite activities were tested using a no-choice bioassay method for Coptotermes formosanus with 2.5, 5.0, 7.5, and 10.0% (v/v). All the wood vinegars exhibited antifungal activities against T. versicolor. In particular, the wood vinegar produced at 350 °C resulted in complete inhibition of T. versicolor growth at 1.0 and 1.5%. However, higher concentrations were required to obtain growth inhibition of F. palustris. All the wood vinegars exhibited antitermite activity to C. formosanus workers in the no-choice experiment at relatively high concentrations. For instance, 10% concentration was required to achieve 100% mortality against C. formosanus at all production temperatures. The lowest mass loss of the treated filter paper of 11.75% was obtained with a 350 °C—10.0% combination.