Control of parasites attached to skin of fish
View Patent ↗A method of successfully controlling sea lice in commercial fish farming, in an efficient and environmentally friendly way, with the compounds named in claim 1 , preferably by injection, and a method of automating this type of control, are described.
1. A process for the preparation of a composition for controlling fish parasites, comprising 0.1 to 99% by weight of a compound of formula (I)
or of one of its physiologically tolerable acid addition salts, wherein X is halogen; X 1 is hydrogen or halogen X 2 , is hydrogen or halogen; —O—Y is in position 3, and Y represents the group
Y 1 is hydrogen or halogen; Y 2 is hydrogen or halogen; Y 3 is hydrogen or halogen; Z 1 is hydrogen or C 1 -C 3 -alkyl; Z 2 is hydrogen or C 1 -C 3 -alkyl and U is hydrogen or halogen; and 99.9 to 1% by weight of an excipient that is physiologically tolerated by fish.
2. The process according to claim 1 wherein the process further comprises mixing 0.1 to 25% by weight of a surfactant that is non-toxic to fish.
3. A composition in the form of an olly injectable suspension, comprising a compound of the formula (I)
or of one of its physiologically tolerable acid addition salts, wherein X is halogen; X 1 is hydrogen or halogen; X 2 is hydrogen or halogen; —O—Y is in position 3, and Y represents the group
Y 1 is hydrogen or halogen; Y 2 is hydrogen or halogen; Y 3 is hydrogen or halogen; Z 1 is hydrogen or C 1 -C 3 -alkyl; Z 2 is hydrogen or C 1 -C 3 -alkyl; and U is hydrogen or halogen and a lipophilic solvent.
4. A composition according to claim 3 , further comprising an excipient that is physiologically tolerated by fish.
5. A composition in the form of an oily injectable suspension, comprising 1-[4-chloro-3-(3-chloro-5-trifluoromethyl-2-pyridyloxy)]-3-(2.6-difluorobenzoyl)urea and a lipophilic solvent.
6. A composition according to claim 5 , further comprising an excipient that is physiologically tolerated by fish.