A compound of formula I-1 wherein R 2 is halogen, cyano, C 1 -C 6 haloalkyl or C 1 -C 6 haloalkyl substituted by one or two substituents selected from the group consisting of hydroxyl, methoxy and cyano; or R 2 is C 1 -C 4 haloalkylsulfanyl, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl, O(C 1 -C 4 haloalkyl), or -C C 1 -C 4 haloalkyl; or R 2 is C 3 -C 6 cycloalkyl which can be mono - or polysubstituted by substituents selected from the group consisting of halogen, cyano and C 1 -C 4 alkyl; Q is a five- to ten-membered monocyclic or fused bicyclic heterocyclic ring system which can be aromatic, partially saturated or fully saturated and which contains 1 to 4 hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, it not being possible for each ring system to contain more than 2 oxygen atoms and more than 2 sulfur atoms, said five- to ten-membered ring system can be mono- to polysubstituted by substituents independently selected from the group consisting of halogen, cyano, oxo, OH, NH 2, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 alkylthio, C 1 -C 6 alkylsulfonyl, C 1 -C 6 alkoxycarbonyl, C 1 -C 6 alkylamino, C 1 -C 6 di-alkylamino, C 1 -C 6 alkoxycarbonylamino, C 1 -C 4 halo-alkylsulfanyl, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl, C 1 -C 6 alkylcarbonyl, C 1 -C 6 halo-alkylcarbonyl, phenyl, pyrimidinyl, thiazolyl, pyridinyl, pyrazinyl, pyridazinyl, pyrazinyloxy, imidazolyl, dihydro-oxazolyl, oxazolyl, dioxolanyl, 1,3-dioxanyl and 5,6-dihydro-[1,4,2]dioxazinyl; wherein said phenyl, pyrimidinyl, thiazolyl, pyridinyl, pyrazinyl, pyridazinyl, pyrazinyloxy, imidazolyl, dihydro-oxazolyl, oxazolyl, dioxolanyl, 1,3-dioxanyl and 5,6-dihydro-[1,4,2]dioxazinyl itself can be mono- to polysubstituted by substituents independently selected from the group consisting of halogen, C 1 -C 6 alkyl, di-C 1 -C 4 alkyl-phosphinoylmethyl-aminocarbonyl, C 1 -C 6 alkoxycarbonylamino, C 1 -C 6 alkoxy, C 1 -C 6 alkylthio, C 1 -C 6 alkylamino and C 1 -C 6 di-alkylamino; Xa 1 is S, SO or SO 2; and Ra 1 is methyl, ethyl, n-propyl, i-propyl or cyclopropylmethyl; or an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer or N-oxide of a compound of formula I-1. R 2 is halogen, cyano, C 1 -C 6 haloalkyl or C 1 -C 6 haloalkyl substituted by one or two substituents selected from the group consisting of hydroxyl, methoxy and cyano; or R 2 is C 1 -C 4 haloalkylsulfanyl, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl, O(C 1 -C 4 haloalkyl), or -C C 1 -C 4 haloalkyl; or R 2 is C 3 -C 6 cycloalkyl which can be mono - or polysubstituted by substituents selected from the group consisting of halogen, cyano and C 1 -C 4 alkyl; Q is a five- to ten-membered monocyclic or fused bicyclic heterocyclic ring system which can be aromatic, partially saturated or fully saturated and which contains 1 to 4 hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, it not being possible for each ring system to contain more than 2 oxygen atoms and more than 2 sulfur atoms, said five- to ten-membered ring system can be mono- to polysubstituted by substituents independently selected from the group consisting of halogen, cyano, oxo, OH, NH 2, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 1 -C 6 haloalkyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 alkylthio, C 1 -C 6 alkylsulfonyl, C 1 -C 6 alkoxycarbonyl, C 1 -C 6 alkylamino, C 1 -C 6 di-alkylamino, C 1 -C 6 alkoxycarbonylamino, C 1 -C 4 halo-alkylsulfanyl, C 1 -C 4 haloalkylsulfinyl, C 1 -C 4 haloalkylsulfonyl, C 1 -C 6 alkylcarbonyl, C 1 -C 6 halo-alkylcarbonyl, phenyl, pyrimidinyl, thiazolyl, pyridinyl, pyrazinyl, pyridazinyl, pyrazinyloxy, imidazolyl, dihydro-oxazolyl, oxazolyl, dioxolanyl, 1,3-dioxanyl and 5,6-dihydro-[1,4,2]dioxazinyl; wherein said phenyl, pyrimidinyl, thiazolyl, pyridinyl, pyrazinyl, pyridazinyl, pyrazinyloxy, imidazolyl, dihydro-oxazolyl, oxazolyl, dioxolanyl, 1,3-dioxanyl and 5,6-dihydro-[1,4,2]dioxazinyl itself can be mono- to polysubstituted by substituents independently selected from the group consisting of halogen, C 1 -C 6 alkyl, di-C 1 -C 4 alkyl-phosphinoylmethyl-aminocarbonyl, C 1 -C 6 alkoxycarbonylamino, C 1 -C 6 alkoxy, C 1 -C 6 alkylthio, C 1 -C 6 alkylamino and C 1 -C 6 di-alkylamino; Xa 1 is S, SO or SO 2; and Ra 1 is methyl, ethyl, n-propyl, i-propyl or cyclopropylmethyl;