A compound of formula: wherein: X is O or S or S(=O); R 1 is halogen, methyl or cyano; R 2 is hydrogen or halogen; R 3 and R 4 are each independently hydrogen or methyl; R 5 and R 6 are each independently selected from hydrogen, C 1 -C 5 alkyl, C 1 -C 5 haloalkyl, cyanoC 1- Csalkyl, C 1 -C 3 alkoxyC 1 - 5 Calkyl, C 2 -C 5 alkenyl, C 2 -C 5 haloalkenyl, cyanoC 2 -C 5 alkenyl, C 1 -C 3 alkoxyC 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 2 -C 5 haloalkynyl, cyanoC 2 -C 5 alkynyl, C 1 -C 3 alkoxyC 2 -C 5 alkynyl and C 3 -C 6 cycloalkyl, wherein cycloalkyl is optionally substituted with 1, 2 or 3 substituents independently selected from halogen, cyano, C 1 -C 3 alkyl and C 1 -C 3 alkoxy; or R 5 and R 6 together with the carbon atom to which they are attached represent C 3 -C 6 cycloalkyl, wherein the cycloalkyl group is optionally substituted with 1, 2 or 3 substituents independently selected from halogen, cyano and C 1 -C 3 alkyl; R 7 is hydrogen, C 1 -C 4 alkyl or C 3 -C 4 cycloalkyl; A is: (i) heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, (ii) heterobiaryl, wherein the heterobiaryl moiety is a 9- or 10-membered fused aromatic ring system which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, (iii) heterocyclyl, wherein the heterocyclyl moiety is a 4-to 6-membered non-aromatic ring which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, or (iv) heterobicyclyl, wherein the heterobicyclyl moiety is a 7- to 10-membered fused or spirocyclic non-aromatic ring system which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, wherein heteroaryl, heterobiaryl, heterocyclyl and heterobicyclyl are each optionally substituted with 1, 2 or 3 substituents independently selected from R 8, and/or for a heterocyclyl or heterobicyclyl moiety the ring may comprise an S z or a C=S group; and R 8 is halogen, nitro, cyano, C 1 -C 5 alkyl, C 1 -C 3 haloalkyl, C 3 -C 6 cycloalkyl, C 1 -C 5 alkoxy, C 3 -C 5 alkenyloxy, C 3 -C 5 alkynyloxy or C 1 -C 5 alkylthio; or an agronomically acceptable salt, an N-oxide and/or S-oxide or a stereoisomer thereof. X is O or S or S(=O); R 1 is halogen, methyl or cyano; R 2 is hydrogen or halogen; R 3 and R 4 are each independently hydrogen or methyl; R 5 and R 6 are each independently selected from hydrogen, C 1 -C 5 alkyl, C 1 -C 5 haloalkyl, cyanoC 1- Csalkyl, C 1 -C 3 alkoxyC 1 - 5 Calkyl, C 2 -C 5 alkenyl, C 2 -C 5 haloalkenyl, cyanoC 2 -C 5 alkenyl, C 1 -C 3 alkoxyC 2 -C 5 alkenyl, C 2 -C 5 alkynyl, C 2 -C 5 haloalkynyl, cyanoC 2 -C 5 alkynyl, C 1 -C 3 alkoxyC 2 -C 5 alkynyl and C 3 -C 6 cycloalkyl, wherein cycloalkyl is optionally substituted with 1, 2 or 3 substituents independently selected from halogen, cyano, C 1 -C 3 alkyl and C 1 -C 3 alkoxy; or R 5 and R 6 together with the carbon atom to which they are attached represent C 3 -C 6 cycloalkyl, wherein the cycloalkyl group is optionally substituted with 1, 2 or 3 substituents independently selected from halogen, cyano and C 1 -C 3 alkyl; R 7 is hydrogen, C 1 -C 4 alkyl or C 3 -C 4 cycloalkyl; A is: (i) heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, (ii) heterobiaryl, wherein the heterobiaryl moiety is a 9- or 10-membered fused aromatic ring system which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, (iii) heterocyclyl, wherein the heterocyclyl moiety is a 4-to 6-membered non-aromatic ring which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, or (iv) heterobicyclyl, wherein the heterobicyclyl moiety is a 7- to 10-membered fused or spirocyclic non-aromatic ring system which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, (i) heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, (ii) heterobiaryl, wherein the heterobiaryl moiety is a 9- or 10-membered fused aromatic ring system which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, (iii) heterocyclyl, wherein the heterocyclyl moiety is a 4-to 6-membered non-aromatic ring which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, or (iv) heterobicyclyl, wherein the heterobicyclyl moiety is a 7- to 10-membered fused or spirocyclic non-aromatic ring system which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, wherein heteroaryl, heterobiaryl, heterocyclyl and heterobicyclyl are each optionally substituted with 1, 2 or 3 substituents independently selected from R 8, and/or for a heterocyclyl or heterobicyclyl moiety the ring may comprise an S z or a C=S group; and R 8 is halogen, nitro, cyano, C 1 -C 5 alkyl, C 1 -C 3 haloalkyl, C 3 -C 6 cycloalkyl, C 1 -C 5 alkoxy, C 3 -C 5 alkenyloxy, C 3 -C 5 alkynyloxy or C 1 -C 5 alkylthio; or an agronomically acceptable salt, an N-oxide and/or S-oxide or a stereoisomer thereof.