A (4-trifluoromethyl-3-thiobenzoyl)cyclohexanedione of the formula or salt thereof in which X is (C 1 -C 4)-alkyl, A and Z independently of one another are oxygen, -S m -, -N(R 5)-, carbonyl or (C 1 -C 4)-alkylene which is interrupted by q units from the group consisting of oxygen, -S m -, -N(R 5)-, and carbonyl, and which is substituted by s radicals R 6, R 1 is (C 1 -C 4)-alkyl, R 2 is hydroxyl, SR 7, NR 8 R 9, R 3 and R 4 are independently of one another hydrogen or (C 1 -C 4)-alkyl, R 5 is hydrogen, (C 1 -C 4)-alkyl, (C 1 -C 4)-alkoxy, (C 1 -C 4)-alkylcarbonyl, (C 1 -C 4)-alkoxycarbonyl, phenylcarbonyl or phenoxycarbonyl, the phenyl ring in the two last-mentioned radicals being substituted by up to p radicals from the group consisting of halogen, nitro, cyano, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl, (C 1 -C 4)-alkoxy, and (C 1 -C 4)-haloalkoxy, Le A ?? ??? R 6 is halogen, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl,(C 1 -C 4)-alkoxy, (C 1 -C 4)-haloalkoxy or (C 1 -C 4)-alkoxy-(C 1 -C 4)-alkyl, R 7 is (C 1 -C 4)-alkyl or is phenyl which is substituted by p radicals from the group consisting of halogen, nitro, cyano, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl, (C 1 -C 4)-alkoxy, and (C 1 -C 4)-haloalkoxy, R 8 is hydrogen, (C 1 -C 4)-alkyl or (C 1 -C 4)-alkoxy, R 9 is hydrogen or (C 1 -C 4)-alkyl, or R 8 and R 9, with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated, partially saturated or fully unsaturated ring which contains m further heteroatoms from the group consisting of oxygen, sulfur, and nitrogen, and which is substituted by up to s halogen atoms and by up to p radicals from the group consisting of cyano, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl, (C 1 -C 4)-alkoxy, and (C 1 -C 4)-haloalkoxy, m and n independently of one another are 0, 1 or 2, p is 0, 1, 2, 3, 4 or 5, q is 0 or 1, and s is 0, 1, 2, 3, 4, 5, 6, 7 or 8. X is (C 1 -C 4)-alkyl, A and Z independently of one another are oxygen, -S m -, -N(R 5)-, carbonyl or (C 1 -C 4)-alkylene which is interrupted by q units from the group consisting of oxygen, -S m -, -N(R 5)-, and carbonyl, and which is substituted by s radicals R 6, R 1 is (C 1 -C 4)-alkyl, R 2 is hydroxyl, SR 7, NR 8 R 9, R 3 and R 4 are independently of one another hydrogen or (C 1 -C 4)-alkyl, R 5 is hydrogen, (C 1 -C 4)-alkyl, (C 1 -C 4)-alkoxy, (C 1 -C 4)-alkylcarbonyl, (C 1 -C 4)-alkoxycarbonyl, phenylcarbonyl or phenoxycarbonyl, the phenyl ring in the two last-mentioned radicals being substituted by up to p radicals from the group consisting of halogen, nitro, cyano, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl, (C 1 -C 4)-alkoxy, and (C 1 -C 4)-haloalkoxy, Le A ?? ??? R 6 is halogen, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl,(C 1 -C 4)-alkoxy, (C 1 -C 4)-haloalkoxy or (C 1 -C 4)-alkoxy-(C 1 -C 4)-alkyl, R 7 is (C 1 -C 4)-alkyl or is phenyl which is substituted by p radicals from the group consisting of halogen, nitro, cyano, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl, (C 1 -C 4)-alkoxy, and (C 1 -C 4)-haloalkoxy, R 8 is hydrogen, (C 1 -C 4)-alkyl or (C 1 -C 4)-alkoxy, R 9 is hydrogen or (C 1 -C 4)-alkyl, or R 8 and R 9, with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated, partially saturated or fully unsaturated ring which contains m further heteroatoms from the group consisting of oxygen, sulfur, and nitrogen, and which is substituted by up to s halogen atoms and by up to p radicals from the group consisting of cyano, (C 1 -C 4)-alkyl, (C 1 -C 4)-haloalkyl, (C 1 -C 4)-alkoxy, and (C 1 -C 4)-haloalkoxy, m and n independently of one another are 0, 1 or 2, p is 0, 1, 2, 3, 4 or 5, q is 0 or 1, and s is 0, 1, 2, 3, 4, 5, 6, 7 or 8.