The permanency of propiconazole (R 49362 - WOCOSENÔ technical - Janssen Pharmaceutica) in wood was examined in an 18 month storage test, an evaporative ageing study (EN 73), a volatilization stress experiment, and water-leaching studies (EN 84). The biological efficacy against two brown rot fungi: Coniophora puteana BAM Ebw. 15 and Gloeophyllum trabeum BAM Ebw. 109 was assessed according to the European Standard EN 113 with and without acceleratedly aged blocks of Scots pine sapwood (Pinus sylvestris L.). Propiconazole proved to be leach-resistant from treated wood. Evaporative ageing had very little effect on its biological performance. Chemical analyses of various Scots pine sapwood (Pinus sylvestris) samples used for EN 113 testing, showed that the concentration gradient in the outermost shell of the wood specimens was not altered by accelerated ageing stresses and that the active ingredient is evenly distributed in the wood substrate. These results indicate that propiconazole is suited for further development as a fungicide for pressure-treated timber.

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