A compound of formula I, wherein G 1 is nitrogen or CR 2; G 2 is nitrogen or CR 3; G 3 is nitrogen or CR 4; G 4 is nitrogen or CR 5; G 5 is nitrogen or CR 6, with the proviso that not more than 2 nitrogens as G may follow consecutively; R 2, R 3, R 4, R 5 or R 6 are, independently from each other, hydrogen, halogen, C 1 -C 4 haloalkyl, C 1 -C 4 haloalkyl substituted by one or two hydroxy, C 1 -C 4 haloalkyl substituted by one or two methoxy, C 1 -C 4 haloalkyl substituted by one or two cyano; or R 2, R 3, R 4, R 5 or R 6, independently from each other, are C 1 -C 4 haloalkylthio, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl, O(C 1 -C 4 haloalkyl), SF 5, phenylcarbonylthio, cyano, mercapto, C 1 -C 4 alkoxycarbonyl, C 1 -C 4 alkylcarbonyl or -C C 1 -C 4 haloalkyl; or two adjacent R i, wherein R i is selected from R 2, R 3, R 4, R 5 and R 6, taken together may form a fragment -OCH 2 O- or -OCF 2 O-; Q is a radical selected from the group consisting of formula Q 1 and Q 2 wherein the arrow denotes the point of attachment to the imidazole ring; and wherein X is S, SO or SO 2; each R is, independently from each other, hydrogen, halogen, C 1 -C 4 haloalkoxy or C 1 -C 4 haloalkyl; each R 1 is, independently from each other, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, C 3 -C 6 cycloalkyl, C 3 -C 6 cycloalkyl-C 1 -C 4 alkyl, C 3 -C 6 halocycloalkyl, C 2 -C 6 alkenyl, C 2 -C 6 haloalkenyl or C 2 -C 6 alkynyl; and each R 7 is, independently from each other, hydrogen or halogen; R 8 is hydrogen, C 1 -C 4 alkyl or C 1 -C 4 haloalkyl; and R 9 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl or halogen; and agrochemically acceptable salts, stereoismers, enantiomers, tautomers and N-oxides of those compounds; with the exception of the compound 2-[5-methyl-4-(3-pyridyl)-1H-imidazol-2-yl]-3-methylsulfanyl-pyridine. G 1 is nitrogen or CR 2; G 2 is nitrogen or CR 3; G 3 is nitrogen or CR 4; G 4 is nitrogen or CR 5; G 5 is nitrogen or CR 6, with the proviso that not more than 2 nitrogens as G may follow consecutively; R 2, R 3, R 4, R 5 or R 6 are, independently from each other, hydrogen, halogen, C 1 -C 4 haloalkyl, C 1 -C 4 haloalkyl substituted by one or two hydroxy, C 1 -C 4 haloalkyl substituted by one or two methoxy, C 1 -C 4 haloalkyl substituted by one or two cyano; or R 2, R 3, R 4, R 5 or R 6, independently from each other, are C 1 -C 4 haloalkylthio, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl, O(C 1 -C 4 haloalkyl), SF 5, phenylcarbonylthio, cyano, mercapto, C 1 -C 4 alkoxycarbonyl, C 1 -C 4 alkylcarbonyl or -C C 1 -C 4 haloalkyl; or two adjacent R i, wherein R i is selected from R 2, R 3, R 4, R 5 and R 6, taken together may form a fragment -OCH 2 O- or -OCF 2 O-; Q is a radical selected from the group consisting of formula Q 1 and Q 2 and wherein X is S, SO or SO 2; each R is, independently from each other, hydrogen, halogen, C 1 -C 4 haloalkoxy or C 1 -C 4 haloalkyl; each R 1 is, independently from each other, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, C 3 -C 6 cycloalkyl, C 3 -C 6 cycloalkyl-C 1 -C 4 alkyl, C 3 -C 6 halocycloalkyl, C 2 -C 6 alkenyl, C 2 -C 6 haloalkenyl or C 2 -C 6 alkynyl; and each R 7 is, independently from each other, hydrogen or halogen; R 8 is hydrogen, C 1 -C 4 alkyl or C 1 -C 4 haloalkyl; and R 9 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl or halogen;