Patent ID: 8128943

Claim:
A method of controlling fish parasites comprising treating a parasites selected from the group consisting of Lepeophtheirus and Caligus species with a composition comprising at least one compound of formula I wherein X and Y, independently of each other, are hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -haloalkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkoxy, C 1 -C 4 -alkylthio, C 1 -C 4 -haloalkylthio, cyano-C 1 -C 4 -alkyl, cyano-C 1 -C 4 -haloalkyl, cyano-C 1 -C 4 -alkoxy, cyano-C 1 -C 4 -haloalkoxy, cyano-C 1 -C 4 -alkylthio, cyano-C 1 -C 4 -haloalkylthio, halogen, amino, cyano or nitro; Z is hydrogen, halogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or di(C 1 -C 4 -alkyl)amino; R 1 is C 1 -C 4 -alkyl, C 1 -C 4 -haloalkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkoxy, C 1 -C 4 -alkylthio, C 1 -C 4 -haloalkylthio, halogen or unsubstituted or one- or twofold substituted phenyl, the substituents being selected from the group consisting of C 1 -C 4 -alkyl, C 1 -C 4 -haloalkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkoxy, C 1 -C 4 -alkylthio, C 1 -C 4 -haloalkylthio, cyano-C 1 -C 4 -alkyl, cyano-C 1 -C 4 -haloalkyl, cyano-C 1 -C 4 -alkoxy, cyano-C 1 -C 4 -haloalkoxy, cyano-C 1 -C 4 -alkylthio, cyano-C 1 -C 4 -haloalkylthio, C 2 -C 6 -alkenyl, C 2 -C 6 -haloalkenyl, C 2 -C 6 -alkenyloxy, C 2 -C 6 -haloalkenyloxy, C 2 -C 6 -alkinyl, C 2 -C 6 -haloalkinyl, C 2 -C 6 -alkinyloxy, C 2 -C 6 -haloalkinyloxy, C 3 -C 8 -cycloalkyl, C 3 -C 8 -halocycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl, C 3 -C 8 -halocycloalkyl-C 1 -C 4 -alkyl, OC(O)R 2 and halogen, wherein when m or the number of substituents on phenyl independently from each other are more than 1, the substituents may be the same or different; R 2 is C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy, C 2 -C 6 -alkenyl, C 2 -C 6 -alkenyloxy, C 2 -C 6 -alkinyl, C 2 -C 6 -alkinyloxy, C 3 -C 8 -cycloalkyl, C 3 -C 8 -cycloalkyloxy, C 3 -C 8 -halocycloalkyl-C 1 -C 4 -alkyl, C 3 -C 8 -halocycloalkyl-C 1 -C 4 -alkyloxy, N(R 3 R 4 ) or unsubstituted or mono- to penta-substituted phenyl, wherein the substituents are selected from the group comprising C 1 -C 4 -alkyl, C 1 -C 4 -haloalkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkoxy, C 1 -C 4 -alkylthio, C 1 -C 4 -haloalkylthio, halogen, cyano and nitro; R 3 is hydrogen or C 1 -C 4 -alkyl; R 4 is C 1 -C 4 -alkyl, C 1 -C 4 -haloalkyl, C 3 -C 8 -cycloalkyl, C 3 -C 8 -halocycloalkyl, C 3 -C 8 -cycloalkyl-C 1 -C 4 -alkyl, C 3 -C 8 -halocycloalkyl-C 1 -C 4 -alkyl, unsubstituted or mono to penta-substituted phenyl or unsubstituted or mono- to penta-substituted phenyl-C 1 -C 4 -alkyl, wherein independently of each other, the substituents are respectively selected from the group comprising C 1 -C 4 -alkyl; and m is 0, 1 or 2; and their enantiomers, in each case either in free form or in the form of a salt; and a carrier physiologically accepted by fish.