Pesticidal active mixtures comprising arylquinazolinone compounds The present invention relates to pesticidal mixtures comprising as active compounds 1) 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 description； and 2) at least one active compound II selected from a group M comprising acteylcholine esterase inhibitors, GABA-gated chloride channel antagonists, sodium channel modulators, nicotinic acteylcholine receptor agonists/antagonists, allosteric nicotinic acetylcholine receptor activitaors, chloride channel activators, juvenile hormone mimics, homopteran feeding blockers, mit grow inhibitors, inhibitors of mitochondrial bATP synthase, uncouplers of the oxidative phosphorylation, inhibitors of the chitin biosynthesis, moulting disruptors, ecdyson receptor agonists, octamin receptor agonists, inhibitors of the MET, voltage-dependent sodium channel blockers, inhibitors of the lipid synthesis, ryanodine receptor modulators and other compounds as defined in the description, in synergistically effective amounts. The invention relates further to methods and use of these mixtures for combating and controlling insects, arachnids or nematodes in and on plants, and for protecting such plants being infested with pests, especially also for protecting plant proparagation material, such as seeds.Mezclas de insecticidas que comprenden, como compuestos activos, 1) al menos un compuesto plaguicida activo I de 3-arilquinazolin-4-ona de la Fórmula (I): (ver Fórmula) en donde R1, R2, R3, R4, k y n son como se definen en la descripción；. Y 2) al menos un compuesto activo II seleccionado del grupo M que comprende inhibidores de acetilcolina esterasa, antagonistas del canal de cloruro regulado por GABA, moduladores del canal de sodio, agonistas/antagonistas del receptor de acetilcolina nicotínico, activadores del receptor de acetilcolina nicotínico alostérico, activadores del canal de cloruro, imitado
