Compounds of formula I wherein m is 0 or 1; Z is methine or nitrogen; X is oxygen or sulfur, R1 is C1-C6-alkyl, halo-C1-C6-cycloalkyl or C2-C6-alkynyl; R2 is C1-C6-alkyl, C1-C6-haloalkyl, C3-C6-cycloalkyl, halo-C3-C6-cycloalkyl, fluoro, chloro or bromo; R3 is C1-C3-alkyl; R4 is hydrogen, C1-C6-alkyl, fluoro, chloro, bromo or cyano; n is 0, 1, 2 or 3; R5 is hydrogen, fluoro, chloro or bromo; and agrochemically acceptable salts and enantiomers of those compounds can be used as insecticides and can be prepared in a manner known per se.