Method for control of fish parasites

Abstract

Disclosed is a method for controlling fish parasites, which comprises continuously administering a folic acid synthesis inhibitor and / or a folic acid activation inhibitor to a fish at a dose of 1 to 50 mg / kg fish body weight per day for one to two weeks. Preferably, a combination of a folic acid synthesis inhibitor and a folic acid activation inhibitor is used. As the folic acid synthesis inhibitor, a sulfa drug is preferred. As the folic acid activation inhibitor, a dihydrofolate reductase inhibitor, a folic acid antagonist, or the like can be used. The parasite control agent can control fish parasites through oral administration. The parasite control agent is particularly effective on ciliate fish parasites.

Description

technical field

[0001] The invention relates to a method for expelling fish parasites. More specifically, it relates to a method for eliminating fish parasites, which uses a folic acid synthesis inhibitor and / or a folic acid activation inhibitor as an active ingredient. In particular, it relates to a method for removing fish parasites which are parasitic in farmed fish and become a problem. Background technique

[0002] Since parasitic diseases prevent stable production in sea culture, it is a very big problem. Cryptocaryon stimuli belonging to the subkingdom Protozoa ciliates Cryptocaryon irritans White spot disease caused by parasitism in marine fish. As a result, the parasitic fish weakens to death. In recent years, the parasitism of Cryptocaryonia stimuli to farmed fish has become a serious problem in the Japanese aquaculture industry. currently reported to stimulate Cryptocaryon parasitism in flatfish Paralichthys olivaceus , Amberjack Seriola dumerili , Amberj...

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