Compounds of the formula I wherein R 1 is selected from halogen, CN, C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 1 -C 6 -alkoxy, C(=O)-(R 12),; wherein R 12 is O-R 121 R 121 is C 1 -C 6 -alkyl; wherein the aliphatic moieties of R 1 are unsubstituted or substituted with identical or different groups R 1a which independently of one another are selected from: R 1a halogen, OH; R 2 is selected from halogen, C 1 -C 6 -alkyl, C 2 -C 6 -alkynyl, C 1 -C 6 -alkoxy, C(=O)-(R 22); wherein R 22 is O-R 221; R 221 is C 1 -C 6 -alkyl; wherein the aliphatic moieties of R 2 are unsubstituted or substituted with identical or different groups R 2a which independently of one another are selected from: R 2a halogen, OH; R 3 is H; R 4 is H; Y is O; Q 1 is C 1 -C 6 -alkyl; Q 2 is H; Q 3 is selected from C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, or six-membered heteroaryl and aryl; wherein the heteroaryl contains one N; wherein the aliphatic moieties of Q 3 are unsubstituted or substituted with identical or different groups Q 3a which independently of one another are selected from: Q 3a halogen, C 1 -C 6 -alkoxy, C 3 -C 6 -cycloalkyl, phenyl, five- to ten-membered heteroaryl; wherein the heteroaryl contains one, two heteroatoms selected from N, O and S; wherein the phenyl, heteroaryl groups are unsubstituted or substituted with 1substituent Q 13a selected from the group consisting of halogen, phenyl; wherein the heteroaryl and aryl moieties of Q 3 are unsubstituted or substituted with 1, 2identical or different groups Q 3b which independently of one another are selected from: Q 3b halogen,; W is O; X is halogen; wherein n is 1; with the proviso that if R 1 is CH 3, R 2 is not CH 3; and if R 2 is CH 3, R 1 is not CH 3. and the N-oxides and the agriculturally acceptable salts thereof. R 1 is selected from halogen, CN, C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 1 -C 6 -alkoxy, C(=O)-(R 12),; wherein R 12 is O-R 121 R 121 is C 1 -C 6 -alkyl; wherein the aliphatic moieties of R 1 are unsubstituted or substituted with identical or different groups R 1a which independently of one another are selected from: R 1a halogen, OH; R 12 is O-R 121 R 121 is C 1 -C 6 -alkyl; R 1a halogen, OH; R 2 is selected from halogen, C 1 -C 6 -alkyl, C 2 -C 6 -alkynyl, C 1 -C 6 -alkoxy, C(=O)-(R 22); wherein R 22 is O-R 221; R 221 is C 1 -C 6 -alkyl; wherein the aliphatic moieties of R 2 are unsubstituted or substituted with identical or different groups R 2a which independently of one another are selected from: R 2a halogen, OH; R 22 is O-R 221; R 221 is C 1 -C 6 -alkyl; R 2a halogen, OH; R 3 is H; R 4 is H; Y is O; Q 1 is C 1 -C 6 -alkyl; Q 2 is H; Q 3 is selected from C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, or six-membered heteroaryl and aryl; wherein the heteroaryl contains one N; wherein the aliphatic moieties of Q 3 are unsubstituted or substituted with identical or different groups Q 3a which independently of one another are selected from: Q 3a halogen, C 1 -C 6 -alkoxy, C 3 -C 6 -cycloalkyl, phenyl, five- to ten-membered heteroaryl; wherein the heteroaryl contains one, two heteroatoms selected from N, O and S; wherein the phenyl, heteroaryl groups are unsubstituted or substituted with 1substituent Q 13a selected from the group consisting of halogen, phenyl; wherein the heteroaryl and aryl moieties of Q 3 are unsubstituted or substituted with 1, 2identical or different groups Q 3b which independently of one another are selected from: Q 3b halogen,; Q 3a halogen, C 1 -C 6 -alkoxy, C 3 -C 6 -cycloalkyl, phenyl, five- to ten-membered heteroaryl; wherein the heteroaryl contains one, two heteroatoms selected from N, O and S; wherein the phenyl, heteroaryl groups are unsubstituted or substituted with 1substituent Q 13a selected from the group consisting of halogen, phenyl; wherein the heteroaryl and aryl moieties of Q 3 are unsubstituted or substituted with 1, 2identical or different groups Q 3b which independently of one another are selected from: Q 3b halogen,; W is O; X is halogen; wherein n is 1; with the proviso that if R 1 is CH 3, R 2 is not CH 3; and if R 2 is CH 3, R 1 is not CH 3. R 1 is CH 3, R 2 is not CH 3; and if R 2 is CH 3, R 1 is not CH 3.