The present invention relates to ternary pesticidal mixtures comprising one tetrazol-5-one fungicidal compound I selected from the group consisting of 1-[3-chloro-2-[[1-(4-chlorophenyl) pyrazol-3-yl]oxymethyl]phenyl]-4-methyl- tetrazol-5-one (1-1),1-[3-bromo-2-[[1-(4-chlorophenyl)pyrazol-3-yl]oxymethyl] phenyl]-4-methyl- tetrazol-5-one (1-2), 1-[2-[[1-(4-chlorophenyl) pyrazol-3-yl] oxymethyl]-3-methyl-phenyl]-4-methyl-tetrazol-5-one (I-3),1-[2-[[1-(4-chlorophenyl) pyrazol-3-yl]oxymethyl]-3-fluoro-phenyl]-4-methyl-tetrazol-5-one (1-4), 1-[2-[[1- (2,4-dichlorophenyl)pyrazol-3-yl]oxymethyl]-3-fluoro-phenyl]-4-methyl-tetrazol- 5-one (1-5), 1-[2-[[4-(4-chlorophenyl)thiazol-2-yl]oxymethyl]-3-methylphenyl] -4-methyl-tetrazol-5-one (1-6), 1-[3-chloro-2-[[4-(p-tolyl)thiazol-2-yl]oxymethyl] phenyl]-4-methyl-tetrazol-5-one (1-7), 1-[3-cyclopropyl-2-[[2-methyl-4- (1-methylpyrazol-3-yl)phenoxy]methyl]phenyl]-4-methyl-tetrazol-5-one (1-8), 1-[3-(difluoromethoxy)-2-[[2-methyl-4-(1-methylpyrazol-3-yl)phenoxy]methyl] phenyl]-4-methyl-tetrazol-5-one (1-9), 1-methyl-4-[3-methyl-2-[[2-methyl-4-(1- methylpyrazol-3-yl)phenoxy]methyl]phenyl]tetrazol-5-one (1-10) and 1-methyl-4- [3-methyl-2-[[1-[3-(trifluoromethyl)phenyl]ethylideneamino]oxymethyl]phenyl] tetrazol-5-one (1-11) and 1-[3-chloro-2-[[1-(4-chlorophenyl)pyrazol-3-yl] oxymethyl]phenyl]-4-methyl-tetrazol-5-one (1-12) and one or more further fungicide, insectide or biological compound. The patent application also relates to plant propagation material and to a pesticidal composition comprising this mixture as well as to the use of the pesticidal mixture in methods for controlling phytopathogenic pests, for improving the health of plants and for the protection of plant propagation material.La présente invention concerne des mélanges pesticides ternaires comprenant un composé fongicide I de type tétrazol-5-one choisi dans le groupe constitué de 1-[3-chloro-2-[[1-(4-chlorophényl)pyrazol-3-yl]oxyméthyl]phényl]-4-méthyl-tétrazol-5-one (1-
