Method for treating fish saprolegniasis with methylene blue

Abstract

The invention provides a method for treating fish saprolegniasis with methylene blue, belonging to the aquiculture disease prevention and cure technology. The method is characterized by firstly confirming that the fish fries suffer from saprolegniasis, dissolving the methylene blue in water and then sprinkling the solution in the whole pool until the final concentration of the water body is 2-4g / m<3>, wherein the solution can be continuously used twice based on the disease condition. The method has the following beneficial effects: the methylene blue is a lustrous dark green columnar crystal or fine brown powder and is soluble in water; and the aqueous solution is blue and alkaline, has mild drug property, has lower toxicity toward fishes and has an obvious effect on treating saprolegniasis.

Description

technical field

[0001] The invention belongs to aquaculture disease prevention technology, and relates to a method for treating fish saprolegniasis with methylene blue. Background technique

[0002] In early spring and late winter, due to reasons such as improper operation of pulling nets or collisions during seed transportation, fish seedlings were scratched, and effective disinfection measures were not taken, causing fish seedlings to suffer from saprolegniasis. The pathogen is saprolegniasis, and when the water temperature is low, the propagation speed is fast. After a large number of fish fry are infected, the fish have difficulty breathing, slow movement, emaciated fish, and die soon.

[0003] After malachite green, a special drug for treating saprolegniasis, was banned, various alternative products emerged one after another, but most of them had mediocre effects. Methylene blue can effectively and quickly kill saprolegniasis and completely cure saprolegniasis. Methyl...