A compound of formula wherein R 1 is selected from the group consisting of hydrogen, halogen, methyl and methoxy; R 2 is selected from the group consisting of hydrogen, halogen, methyl and methoxy; R 3 is selected from the group consisting of hydrogen, halogen, methyl and methoxy; R 4 is C 3 -C 7 cycloalkyl or C 3 -C 7 cycloalkenyl, wherein said cycloalkyl or cycloalkenyl is optionally substituted by 1, 2 or 3 R 5 substituents, which may be the same or different; R 5 is selected from the group consisting of halogen, hydroxy, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 haloalkyl, C 2 -C 4 haloalkenyl, cyanoC 1 -C 4 alkyl, C 3 -C 6 cycloalkyl, C 3 -C 6 halocycloalkyl, C 3 -C 6 cycloalkylC 1 -C 4 alkyl-, C 3 -C 6 cycloalkylC 2 -C 6 alkenyl-, C 1 -C 4 alkoxy, C 3 -C 4 alkenyloxy, C 3 -C 4 alkynyloxy, C 1 -C 4 haloalkoxy, C 3 -C 6 cycloalkylC 1 -C 4 alkoxy-, C 1 -C 3 alkoxyC 1 -C 3 alkoxy-, C 1 -C 5 alkoxyC 1 -C 3 alkyl-, (=NOR 6), (=O), phenoxyC 1 -C 3 alkyl-, heteroaryloxyC 1 -C 3 alkyl-, phenoxy and heteroaryloxy, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from nitrogen, oxygen and sulfur, and wherein said phenyl or heteroaryl moieties are optionally substituted by 1, 2 or 3 R 7 substituents, which may be the same or different; R 6 is selected from the group consisting of C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 3 -C 6 cycloalkylC 1 -C 2 alkyl-, C 3 -C 6 alkynyl, C 3 -C 6 alkenyl and C 3 -C 6 haloalkenyl; R 7 is selected from the group consisting of fluoro, chloro, cyano, hydroxy, methyl, ethyl, methoxy, ethoxy, difluoromethyl, trifluoromethyl, difluoromethoxy and trifluoromethoxy, or an agronomically acceptable salt thereof; or an N-oxide thereof. R 1 is selected from the group consisting of hydrogen, halogen, methyl and methoxy; R 2 is selected from the group consisting of hydrogen, halogen, methyl and methoxy; R 3 is selected from the group consisting of hydrogen, halogen, methyl and methoxy; R 4 is C 3 -C 7 cycloalkyl or C 3 -C 7 cycloalkenyl, wherein said cycloalkyl or cycloalkenyl is optionally substituted by 1, 2 or 3 R 5 substituents, which may be the same or different; R 5 is selected from the group consisting of halogen, hydroxy, cyano, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 haloalkyl, C 2 -C 4 haloalkenyl, cyanoC 1 -C 4 alkyl, C 3 -C 6 cycloalkyl, C 3 -C 6 halocycloalkyl, C 3 -C 6 cycloalkylC 1 -C 4 alkyl-, C 3 -C 6 cycloalkylC 2 -C 6 alkenyl-, C 1 -C 4 alkoxy, C 3 -C 4 alkenyloxy, C 3 -C 4 alkynyloxy, C 1 -C 4 haloalkoxy, C 3 -C 6 cycloalkylC 1 -C 4 alkoxy-, C 1 -C 3 alkoxyC 1 -C 3 alkoxy-, C 1 -C 5 alkoxyC 1 -C 3 alkyl-, (=NOR 6), (=O), phenoxyC 1 -C 3 alkyl-, heteroaryloxyC 1 -C 3 alkyl-, phenoxy and heteroaryloxy, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from nitrogen, oxygen and sulfur, and wherein said phenyl or heteroaryl moieties are optionally substituted by 1, 2 or 3 R 7 substituents, which may be the same or different; R 6 is selected from the group consisting of C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 3 -C 6 cycloalkylC 1 -C 2 alkyl-, C 3 -C 6 alkynyl, C 3 -C 6 alkenyl and C 3 -C 6 haloalkenyl; R 7 is selected from the group consisting of fluoro, chloro, cyano, hydroxy, methyl, ethyl, methoxy, ethoxy, difluoromethyl, trifluoromethyl, difluoromethoxy and trifluoromethoxy, or an agronomically acceptable salt thereof; or an N-oxide thereof.