An insecticidal composition comprising: (a) at least one compound selectedfrom the group consisting of imidacloprid, clothianidin, thiamethoxam,thiacloprid,dinotefuran, acetamiprid and nitenpyram； and (b) at least one compoundselected from thegroup consisting of cloquintocet-mexyl, fenchlorazol-ethyl, isoxadifen-ethyl,mefenpyr-diethyl, furilazole, fenclorium, cumyluron, dimepiperate,(see formula I) and (see formula II)which are used for controlling arthropods； and also methods for controllingarthropods bytreating plants and their seeds with the compositions.
