The present invention provides a method comprising applying to a crop of cotton plants, the locus thereof, or propagation material thereof, a compound of formula (I) wherein -B1-B2-B3- is —C═N—O—, —C═N—CH2—, or —N—CH2—CH2— R1 is trifluoromethyl, difluoromethyl or chlorodifluoromethyl R2 is group X formula (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 X6 is not hydrogen A is selected from A1 to A (A5) B is C—R6, CH or nitrogen 1Y2 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 R is hydrogen, halogen, cyano, nitro, NH2, C1-C4alkyl, C1-C4haloalkyl, C3-C5 cycloalkyl, C3-C5 halocycloalkyl, C1-C2 alkoxy, or C1-C2 haloalkoxy provided 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-C4 alkyl) R8 is C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy(C1-C4)alkyl, C1-C4 alkylthio(C1-C4)alkyl, C1-C4 alkylsulfinyl(C1-C4)alkyl, alkylsulfonyl(C1-C4) alkyl, C3-C6 cycloalkyl, C3-C6 cycloalkyl(C1-C4)alkyl-, or tetrahydrofuranyl R9 is C1-C4alkyl, C1-C4haloalkyl, C1-C4 alkyl-O—CH2—, C1-C4 haloalkyl-O—CH2—, C3-C6 cycloalkyl, C3-C6 cycloalkyl-CH2—, alkyl-S—CH2—, C1-C4 alkyl-S(O)—CH2—, or C1-C4 alkyl-S(O2)—CH2 each Z is independently halogen, C1-C12 alkyl or C1-C12 alkyl substituted by one to five R12, nitro, C1-C12 alkoxy or C1-C12 alkoxy 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. The methods are preferably for the control of Anthonomus grandis.
