The invention relates to novel compounds of the formula (I) in which W, X, Y, Z, and CKE 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/or fungicides. Moreover, the invention relates to selectively herbicidal compositions comprising, firstly, the biphenyl-substituted cyclic ketoenols and, secondly, a crop plant compatibility-improving compound.The present invention furthermore relates to the boosting of the action of crop protection compositions comprising in particular biphenyl-substituted cyclic ketoenols through the addition of ammonium or phosphium salts and optionally penetrants, to the corresponding compositions, to processes for their preparation and to their use in crop protection as insecticides and/or nematicides and/or acaricides and/or fungicides and/or for preventing unwanted plant growth.