A field test of wood preservatives was carried out with Nasutitermes rippertii RAMBUR in the vicinity of the Material Testing Centre „Alexander von Humboldt" in Santiago de las Vegas/ Havana (Cuba) for 12 and 24 months. Test specimens of Pinus sylvestris L., Picea abies (L.) Karst. and Fagus sylvatica L. with dimensions of 25 x 25 x 490 mm³ were arranged vertically or horizontally in a circle of 1.5 m around the termite colony. The biostability of five wood preservatives - „Kombinal TO“ with TBTO, „Hylotox 59“ with Lindane and DDT, "Dohnalit UA" a CFA-salt, "V 51" a CCA-salt and "V 94" a CCF-salt - was tested. For the evaluation of termite attack, the building of galleries during the test and the feeding traces on the test specimens were determined. Additionally, fungal attack by soft rot and decay was macroscopically and microscopically established. Mass loss and strength loss from biological attack on the test specimens were also determined.

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