A herbicidal compound of Formula (I): ** Formula ** or an agronomically acceptable salt of said compound, wherein: - R1 is selected from the group consisting of hydrogen, C1-C6 alkyl, C1-C6 haloalkyl, C1 alkoxy -C3-C1-C3 alkyl, C1-C3 alkoxy-C1-C3 alkoxy-C1-C3 alkyl, C1-C3 alkoxy-C1-C3 haloalkyl, C1-C3 alkoxy-C1-C3 alkoxy-C1-C3 haloalkyl, C4 cycloalkoxy -C6 oxasubstituted-C1-C3 alkyl, C4-C6 cycloalkyl oxasubstituted-C1-C3 alkoxy-C1-C3 alkyl, C4-C6 cycloalkoxy oxo substituted-haloalkyl C1-C3, C4-C6 cycloalkyl oxasubstituted-C1-C3-alkoxy C1- C3, (C1-C3 alkanesulfonyl-C1-C3 alkyl amino) -C1-C3 alkyl, (C1-C3 alkanesulfonyl C3-C4 amino) -C1-C3 alkyl, C1-C6 alkylcarbonyl-C1-C3 alkyl, cycloalkyl C3-C6-C2-C6 alkenyl, C2-C6 alkynyl, C2-C6 alkenyl, C2-C6 haloalkenyl, C1-C6 cyanoalkyl, arylcarbonyl-C1-C3 alkyl alkyl (wherein the aryl can be optionally substituted by one or more substituents of the group consisting of halo, alkoxy C 1-C3, C1-C3 alkyl, C1-C3 haloalkyl), aryl-C1-C6 alkyl, aryloxy-C1-C6 alkyl (where in both cases the aryl can be optionally substituted by one or more substituents of the group consisting of halo , C1-C3 alkoxy, C1-C3 alkyl, C1-C3 haloalkyl), and a three or ten membered mono or bicyclic ring system, which may be aromatic, saturated or partially saturated and may contain 1 to 4 heteroatoms each independently selected from the group consisting of nitrogen, oxygen and sulfur, the ring system being optionally substituted by one or more substituents selected from the group consisting of C1-C3 alkyl, C1-C3 haloalkyl, C1-C3 alkenyl, C1-C3 alkynyl , C1-C3 alkoxy, C1-C3 haloalkoxy, C1-C6-S (O) p- alkyl, C1-C6-S haloalkyl (O) p-, aryl, aryl-S (O) p, heteroaryl-S (O ) p, aryloxy, heteroaryloxy, C1-C3 alkoxycarbonyl, C1-C3 alkyl amino-S (O) p-, C1-C3 alkyl amino-S (O) p-C1-C3 alkyl, C1-C3 dialkyl amino-S (O) p-, C1-C3 dialkyl amino-S ( O) p-C1-C3 alkyl, C1-C3 alkyl aminocarbonyl, C1-C3 alkyl aminocarbonyl-C1-C3 alkyl, dialkyl C1-C3 aminocarbonyl, dialkyl C1-C3 am
