The present invention provides a method comprising applying to a crop of rice plants, the locus thereof, or propagation material thereof, a compound of formula (I) wherein -B1-Β2-Β3- is -C=N-O-, -C=N-CH2-, or -N-CH2-CH2- providing that when A is A1 -B1-Β2-Β3- is -C=N-CH2- or -N-CH2-CH2-, when A is A2 -B1-Β2-Β3- is -C=N-O- or -N-CH2-CH2-, and when A is A3 -B1-B2-B3- is -C=N-O- R1 is trifluoromethyl, difluoromethyl or chlorodifluoromethyl R2 is group (X) X2 is C-X6 or nitrogen X1, X3 and X6 are independently hydrogen, halogen or trihalomethyl, wherein at least one of X1, X3 and X 6 : is not hydrogen A is selected from (A1) to (A5) Y1 is C-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-C4haloalkyl, 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 -CH=CH-CH=CH- 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-CH2-, C1-C4haloalkyl-O-CH2-,C3-C6cycloalkyl, C3- C6cycloalkyl-CH2, C1-C4alkyl-S-CH2-, C1-C4alkyl-S(O)-CH2-, or C1-C4alkyl-S(O)-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 C1-C8haloalkylthio and k is 0, 1,2 or 3.La présente invention concerne un procédé comprenant lapplication à une culture de plants de riz, à l
