The present invention provides a method of controlling and/or preventing soil-dwelling pests in useful plants comprising applying to the locus of the useful plant or treating propagation material thereof, preferably a seed, with a compound of formula (I), wherein &mdash；B1&mdash；B2&mdash；B3&mdash； is &mdash；C&boxH；N&mdash；O&mdash；, &mdash；C&boxH；N&mdash；CH2&mdash；, or &mdash；N&mdash；CH2&mdash；CH2&mdash；； R1 is trifluoromethyl, difluoromethyl or chlorodifluoromethyl； R2 is group X X2 is C&mdash；X6 or nitrogen； X1, X3 and X6 are independently hydrogen, halogen or trihalomethyl, wherein at least one of X1, X3 and X6 is not hydrogen； A is selected from A1 to A5 Y1 is C&mdash；R6, CH or nitrogen； Y2 and Y3 are independently CH or nitrogen； wherein no more than two of Y1, Y2 and Y3 are nitrogen and wherein Y2 and Y3 are not both nitrogen； R5 is hydrogen, halogen, cyano, nitro, NH2, C1-C4alkyl, C1-C4aloalkyl, C3-C5cycloalkyl, C3-C5halocycloalkyl, C1-C2alkoxy, or C1-C2haloalkoxy； providing that when A is A3 or A4 R5 is not hydrogen； R6 when present together with R5 forms a &mdash；CH&boxH；CH&mdash；CH&boxH；CH&mdash； bridge； R7 is C1-C4alkyl； R8 is C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy(C1-C4)alkyl, C1-C4alkylthio(C1-C4)alkyl, C1-C4alkylsulfmyl(C1-C4)alkyl, C1-C4alkylsulfonyl(C1-C4)alkyl, C3-C6cycloalkyl, C3-C6cycloalkyl(C1-C4)alkyl-, or tetrahydrofuranyl； R9 is C1-C4alkyl, C1-C4haloalkyl, C1-C4alkyl-O&mdash；CH2&mdash；, C1-C4haloalkyl-O&mdash；CH2&mdash；, C3-C6cycloalkyl, C3-C6cycloalkyl-CH2&mdash；, C1-C4alkyl-S&mdash；CH2&mdash；, C1-C4alkyl-S(O)&mdash；CH2&mdash；, or C1-C4alkyl-S(O2)&mdash；CH2； each Z is independently halogen, C1-C12alkyl or C1-C12alkyl substituted by one to five R12, nitro, C1-C12alkoxy or C1-C12alkoxy substituted by one to five R12 cyano, C1-C12alkylsulfinyl, C1-C12alkylsulfonyl, C1-C12haloalkylsulfinyl, C1-C12haloalkylsulfonyl, hydroxyl or thiol； each R12 is halogen, cyano, nitro, hydroxy, C1-C8alkoxy-, C1-C8haloalkoxy-, mercapto, C1-C8alkylthio-, or CpCghalo
