A RESEARCH ON THE USAGE OF EXTRACTS FROM TWO POISONOUS PLANTS (MUSCARINEGLECTUM GUSS. AND GYNANDRIRIS SISYRINCHIUM (L.) PARL.) AS A WOOD PRESERVATIVE

摘要

In this study, the antifungal property of poisonous plant extracts from Muscari neglectum Guss. and Gynandriris sisyrinchium (L.) Pari, were determined when being evaluated as wood preservatives. Mixtures of bulb and leaves of the plants mentioned above were individually extracted using ethyl alcohol. Wood blocks of Turkish oriental beech (Fagus orientalis LJ and Scots pine (Pinus sylvestris L.) were impregnated with the plant extracts. The abilities of the extracts to suppress attack by Postia placenta (Fr.) (a brown-rot) and Trametes versicolor (L: Fr.) Quel, (a white-rot) were investigated. Treated blocks were exposed to P. placenta and T. versicolor attacks for 12 weeks by following the soil block method. While untreated wood specimens have weight loss ranging between 35.06 and 41.71 % for P. placenta, and 12.00 and 30.29 % for T.versicolor. The wood treated with the plant extracts is of weight loss between 5.38 and 18.30 % for P. placenta, and between 7.34 and 42.76 % for T. versicolor. The lowest weight loss (5.38 %) was found to be for beech wood impregnated with the extract of Gynandriris sisyrinchium at a concentration level of 0.25 % against P. placenta. Meanwhile, the highest weight loss was also on the beech wood (42.76 %) treated withthe same plant extract at the level of 3.00 % concentration against T. versicolor.