A compound of formula: wherein Ring A is independently a 5- or 6- membered heteroaryl ring having a nitrogen in the position indicated, optionally further substituted with from 1 to 3 R 3 groups; Ring D is independently selected from 5- or 6- membered heteroaryl and phenyl, optionally further substituted with from 1 to 5 R 6 groups; Z 1 is independently selected from N and CR 4a, wherein R 4a is H; =A 1 is selected from =O and =S; -L 1 - is -C 1 -C 3 -alkylene-; -L 2 - is absent or is independently selected from -O-, -S- and -NR 9 -; y is an integer from 0 to 4; R 1, R 9 and R 10 are each independently at each occurence selected from H and C 1 -C 4 -alkyl; R 2 is independently selected from: C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl, phenyl, -CR 7 R 7 L 3 R 8, and -C 1 -C 3 -alkylene-R 2a; wherein R 2a is independently selected from C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6-membered heteroaryl and phenyl; -L 3 - is independently selected from -O-, -S- and -NR 9 -; R 3, R 5 and R 6 are each independently at each occurrence selected from: halo, nitro, cyano, NR 10 R 11, NR 10 S 2 R 10, NR 10 C R 10, NR 10 CONR 10 R 10, NR 10 CO 2 R 10, OR 10, SR 10, S R 10, S 2 R 10, S 2 NR 10 R 10, CO 2 R 10, C R 10, CONR 10 R 10, C 1 -C 4 -alkyl, C 2 -C 4 -alkenyl, C 2 -C 4 -alkynyl, phenyl, C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl and C 1 -C 4 -haloalkyl; R 7 is independently at each occurrence selected from F, H and C 1 -C 4 -alkyl; R 8 is independently selected from H, C 1 -C 4 -alkyl, C 3 -C 4 -alkenyl, C 3 -C 4 -alkynyl, C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl, phenyl and -C 1 -C 3 -alkylene-R 8a; wherein R 8a is independently selected from C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl and phenyl; R 11 is independently at each occurence selected from H, C 3 -C 6 -cycloalkyl, C 1 -C 4 -alkyl, C -C 1 -C 4 -alkyl and S 2 -C 1 -C 4 -alkyl; wherein any R 1 -R 11 group, including R 2a and R 8a, comprises an alkyl, alkylene, haloalkyl, cycloalkyl, heterocycloalkyl, aryl, optionally a phenyl, or heteroaryl group may be optionally substituted, where chemically possible, by 1 to 5 substituents which are each independently selected at each occurrence from: oxo, =NR a, =NOR a, halo, nitro, cyano, NR a R a, NR a S 2 R a, NR a C R a, NR a CONR a R a, NR a CO 2 R a, OR a, SR a, S R a, S 2 R a, S 2 NR a R a, CO 2 R a C R a, CONR a R a, unsubstituted C 1 -C 4 -alkyl, unsubstituted C 2 -C 4 -alkenyl, unsubstituted C 2 -C 4 -alkynyl and unsubstituted C 1 -C 4 -haloalkyl; wherein R a is independently at each occurrence selected from H, unsubstituted C 1 -C 4 alkyl and unsubstituted C 1 -C 4 -haloalkyl; or an agronomically acceptable salt or N-oxide thereof. wherein Ring A is independently a 5- or 6- membered heteroaryl ring having a nitrogen in the position indicated, optionally further substituted with from 1 to 3 R 3 groups; Ring D is independently selected from 5- or 6- membered heteroaryl and phenyl, optionally further substituted with from 1 to 5 R 6 groups; Z 1 is independently selected from N and CR 4a, wherein R 4a is H; =A 1 is selected from =O and =S; -L 1 - is -C 1 -C 3 -alkylene-; -L 2 - is absent or is independently selected from -O-, -S- and -NR 9 -; y is an integer from 0 to 4; R 1, R 9 and R 10 are each independently at each occurence selected from H and C 1 -C 4 -alkyl; R 2 is independently selected from: C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl, phenyl, -CR 7 R 7 L 3 R 8, and -C 1 -C 3 -alkylene-R 2a; wherein R 2a is independently selected from C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6-membered heteroaryl and phenyl; -L 3 - is independently selected from -O-, -S- and -NR 9 -; R 3, R 5 and R 6 are each independently at each occurrence selected from: halo, nitro, cyano, NR 10 R 11, NR 10 S 2 R 10, NR 10 C R 10, NR 10 CONR 10 R 10, NR 10 CO 2 R 10, OR 10, SR 10, S R 10, S 2 R 10, S 2 NR 10 R 10, CO 2 R 10, C R 10, CONR 10 R 10, C 1 -C 4 -alkyl, C 2 -C 4 -alkenyl, C 2 -C 4 -alkynyl, phenyl, C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl and C 1 -C 4 -haloalkyl; R 7 is independently at each occurrence selected from F, H and C 1 -C 4 -alkyl; R 8 is independently selected from H, C 1 -C 4 -alkyl, C 3 -C 4 -alkenyl, C 3 -C 4 -alkynyl, C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl, phenyl and -C 1 -C 3 -alkylene-R 8a; wherein R 8a is independently selected from C 3 -C 6 -cycloalkyl, 3-6 -heterocycloalkyl, 5- or 6- membered heteroaryl and phenyl; R 11 is independently at each occurence selected from H, C 3 -C 6 -cycloalkyl, C 1 -C 4 -alkyl, C -C 1 -C 4 -alkyl and S 2 -C 1 -C 4 -alkyl; wherein any R 1 -R 11 group, including R 2a and R 8a, comprises an alkyl, alkylene, haloalkyl, cycloalkyl, heterocycloalkyl, aryl, optionally a phenyl, or heteroaryl group may be optionally substituted, where chemically possible, by 1 to 5 substituents which are each independently selected at each occurrence from: oxo, =NR a, =NOR a, halo, nitro, cyano, NR a R a, NR a S 2 R a, NR a C R a, NR a CONR a R a, NR a CO 2 R a, OR a, SR a, S R a, S 2 R a, S 2 NR a R a, CO 2 R a C R a, CONR a R a, unsubstituted C 1 -C 4 -alkyl, unsubstituted C 2 -C 4 -alkenyl, unsubstituted C 2 -C 4 -alkynyl and unsubstituted C 1 -C 4 -haloalkyl; wherein R a is independently at each occurrence selected from H, unsubstituted C 1 -C 4 alkyl and unsubstituted C 1 -C 4 -haloalkyl;