The present invention relates to substituted 1-{2-[2-halo-4-(4-halogen-phenoxy)-phenyl]-2-alkoxy-2-alkynyl-ethyl}-1H-[1,2,4]triazole compounds of formula I as defined in the description, and the N-oxides, and salts thereof, processes and intermediates for preparing these compounds and also to compositions comprising at least one such compound. The invention also relates to the use of such compounds and compositions for combating harmful fungi and seed coated with at least one such compound.