Compounds of formula wherein A1, A2 and A3 are each independently of the others a bond or a C1-C6alkylene bridge; A4 is a C1-C6alkylene bridge; D is CH or N; W is, for example, O, NR7 or S; T is, for example, a bond, O, NH or NR7; Q is O, NR7, S, SO or SO2; Y is O, NR7, S, SO or SO2; X1 and X2 are each independently of the other fluorine, chlorine or bromine; R1, R2 and R3 are, for example, H, halogen, CN, nitro, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkylcarbonyl or C2-C6alkenyl; R4 is, for example, H, halogen, CN, nitro or C1-C6alkyl; R5 and R6 are, for example, H, CN, OH, C1-C6alkyl, C3-C8cycloalkyl, C3-C8cycloalkyl-C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy or C1-C6haloalkoxy; R7 is H, C1-C6alkyl, C1-C6alkoxyalkyl or C1-C6alkylcarbonyl; k, when D is nitrogen, is 1, 2 or 3; or, when D is CH, is 1, 2, 3 or 4; and m is 1 or 2; and, where applicable, their possible E/Z isomers, E/Z isomeric mixtures and/or tautomers, in each case in free form or in salt form, a process for the preparation of those compounds and their use, pesticidal compositions in which the active ingredient has been selected from those compounds or an agrochemically acceptable salt thereof, a process for the preparation of those compositions and their use, plant propagation material treated with those compositions, and a method of controlling pests.