Synergistic herbicidal compositions

A herbicidal composition, comprising an effective amount of

• A) the compound 2-[2-chloro-3-(2,2,2-trifluoroethoxymethyl)-4-methylsulfonylbenzoyl]cyclohexane-1,3-dione or an agriculturally suitable salt thereof (component A) and
• B) at least one compound (component b) from one of the following groups
• B1 inhibitors of the biosynthesis of branched amino acids:
• ethoxysulfurone, flumetsulam, halosulfuron, imazamox, imazapyr, imazaquin, imazethapyr, metosulam, nicosulfuron, primisulfuron, prosulfuron, rimsulfuron, thifensulfuron-methyl, triflusulfuron, N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-2-dimethylaminocarbonyl-5-formylaminobenzenesulfonamide (foramsulfuron);
• B2 inhibitors of the photosynthesis electron transport:
• ametryne, atrazine, bromoxynil, cyanazine, diuron, hexazinone, metribuzin, pyridate, terbuthylazine;
• B3 synthetic auxins:
• 2,4-D, clopyralid, dicamba, diflufenzopyr, fluroxypyr,
• B4 inhibitors of fatty acid biosynthesis:
• butylate, EPTC, fenoxaprop-P-ethyl;
• B5 inhibitors of cell division:
• acetochlor, alachlor, dimethenamid, flufenacet, mefenacet, metolachlor, thenylchlor, S-metolachlor;
• B6 inhibitors of protoporphyrinogen oxidase
• fluthiacet-methyl, carfentrazone-ethyl;
• B7 inhibitors of hydroxyphenylpyruvate dioxygenase
• isoxaflutole, mesotrione, sulcotrione, 4-(4-trifluoromethyl-2-methylsulfonylbenzoyl)-5-hydroxy-1-methyl-3-methylpyrazole;
• B8 glyphosate;
• B9 pendimethalin;
• B10 trifluralin;
• B11 asulam;
• B12 triaziflam;
• B13 diflufenican and
• B14 glufosinate-ammonium,
• where this composition comprises the component A or a salt thereof and the compounds of group B1 to B14 in a weight ratio of from 1:2000 to 2000:1.