Insecticidal compositions, characterized by an effective amount of a combination of active compounds comprising(a) at least one compound of the formula (I)in which Het, A, R and X are as defined in the description, and(b) at least one crop plant compatibility-improving compound from the group of compounds listed in the description,which are used for controlling arthropods, and also methods for controlling arthropods by treating plants and their seed with the compositions.
