The invention relates to novel compounds of the formula (I), wherein W, X, Y, Z, A, B and G have the meanings given above, to a plurality of methods and intermediate products for the production thereof, and to the use thereof as pest control agents and/or herbicides. The invention further relates to selective herbicidal agents comprising geminal alkoxy/alkylspirocyclic substituted tetramic acid derivates and a compound improving compatibility with useful plants. The invention further relates to increasing the effectiveness of crop protection products comprising compounds of the formula (I) by adding ammonia or phosphonium salts and optionally penetration enhancers.
