The present invention relates to hetaryl-substituted pyrazolidine derivatives of the formula (I) ##STR00001## in which Het, A, D and G are as defined above, to a plurality of processes for their preparation and to their use as pesticides and/or herbicides.Moreover, the invention relates to selective herbicidal compositions comprising both the hetaryl-substituted pyrazolidinedione derivatives and a crop plant compatibility-improving compound.