The invention relates to novel compounds of the formula (I)in whichW, X, Y, Z, A and G have the meanings given above, to a plurality of processes and intermediates for their preparation and to their use as pesticides and/or herbicides, and also to selective herbicidal compositions comprising, firstly, the cis-alkoxyspirocyclic biphenyl-substituted tetramic acid derivatives of the formula (I) and, secondly, at least one crop plant compatibility-improving compound.The invention relates furthermore to increasing the activity of crop protection compositions comprising compounds of the formula (I) by adding ammonium or phosphonium salts and, if appropriate, penetrants.
