Described herein are pesticidal mixtures including as active components at least one specific nitrification inhibitor (compound I) and at least one biopesticide (compound II). Also described herein are a method for controlling phytopathogenic harmful fungi, or for improving the nitrification-inhibiting effect, or for increasing the health of a plant using mixtures of at least one compound I and at least one compound II and a method of using the mixtures comprising compounds I and compounds II for controlling phytopathogenic harmful fungi or to increasing the health of a plant. Also described herein are agrochemical compositions including these mixtures. Also described herein is plant propagation material including these mixtures or agrochemical compositions.
