The present invention relates to pesticidal mixtures comprising as active compounds1) at least one pesticidal active 3-arylquinazolin-4-one compound I of formula (I):wherein R1, R2, R3, R4, k and n are defined in the descriptionand2) at least one fungicidal compounds II selected from azoles, strobilurins, carboxamides, carbamates, heterocyclic and various other compounds as defined in the description, in synergistically effective amounts.The invention relates further to methods and use of these mixtures for combating insects, arachnids or nematodes and harmful fungis in and on plants, and for protecting such plants being infested with pests, especially also for protecting seeds.
