The usage of Triazole-combinations for wood preservatives is common practice in several countries. Especially the combination of Tebuconazole and Propiconazole is preferred for this application due to its broad spectrum of efficacy against wood destroying fungi. 1-(4-Chlorphenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)-butanon, also known as Triadimefon provides a good efficacy against the wood destroying fungi species Poria placenta and Coriolus versicolor and is therefore a possible active ingredient to be combined with Triazoles already in use, which are showing a moderate or lower efficacy against other important fungi species like Coniophora puteana and Gloeophyllum trabeum. This paper summarizes laboratory tests done with the active ingredients Triadimefon and Tebuconazole, as single actives and also in combination with each other, as well as the results of subsequent field trials in USA, Denmark and New Zealand.

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