The invention relates to novel compounds of the formula (I) in which W, 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.本發明係有關一種新穎之式(I)經順式-烷氧基螺環聯苯-取代之吡咯酮酸衍生物其中W、X、Y、Z、A與G如上述定義,並有關其許多種製法與製法之中間物,及其作為殺有害生物劑與/或除草劑之用途,亦有關一種選擇性除草組合物,其首要包含式(I)經順式-烷氧基螺環聯苯-取代之吡咯酮酸衍生物,及其次包含至少一種改善作物相容性之化合物。本發明進一步有關透過添加銨鹽或鏻鹽與若適當時添加之滲透劑來提高包含式(I)化合物之作物保護性組合物之活性之方法。
