SU1210254A1 - Method for prophylaxis of fish parasitogenic diseases - Google Patents

Description

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The invention relates to iromindustry fish farming, namely to the prevention and control of diseases caused by ectoparasites.

The purpose of the invention is to increase the resistance of the fish to the infection by ectoparasites.

In addition, when using the method, the total weight of the farmed fish increases and, as a result, the fish productivity increases.

The essence of the method consists in using crotonolactone as a biologically active substance, which is introduced either into the pond at the rate of 0.01-0.02 mg per 1 liter of water during the vegetative period, or into baths at the rate of 0.1- 0.3 g per 1 liter of water once.

Crotonolactone through the skin and gills penetrates the fish's body, having a strengthening effect on the structural elements of the skin and gills, as well as on the course of the metabolic processes of the whole organism. As a result, the body's defenses are strengthened, the humoral factors of natural immunity (lysozyme activity, the content of sialic acids and sulfidryl blood groups are activated, which contributes to the emergence of particular resistance against parasites).

Crotonolactone is a colorless, air-yellowing liquid, soluble in benzene, ether, ethanol, water, but poorly soluble in carbon tetrachloride.

Boiling point 92-94 ° C at 9 mm Hg. - 1.4660, - 1.1954g / cm

Crotonolactone has a molecular weight of 84, empirical formula,.

Structural formula

Introduction of crotonolactone in a dose of up to 0.01 mg / l does not have a sufficiently effective effect. Introduction of crotonolactone more than 0.02 mg / l is irrational. The use of crotonolactone in the form of baths once before planting fish in a reservoir at a dose of up to 0.1 g / l is ineffective, and more than 0.3 g / l leads to unnecessary costs of crotonolactone.

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The use of crotonolactone is done in several ways.

The pond bed and its slopes are processed and the pond is poured.

5 with water. If the pond is already flooded, then the buttons are prepared from hay, kept in a solution of crotonolactone, and then transferred to the reservoir. The multiplicity of sheaves - 2 times per month. In addition, the crotonolactone solution is added evenly over the water once every 10 days during the growing season.

Before landing the fish in the pond she

fS is also treated with a solution of crotonolactone in the form of baths.

Example 1. Determine the volume. water in the pond. It turned out to be 10 million l.

20 We found the required amount of crotonolactone at the rate of 0.01 mg / l, for which this number was multiplied by the volume. The total amount of crotonolactone in the reservoir, of the specified area, was equal to

25 100 g. Then a 0.2% working solution of the preparation was prepared, for which a measured amount of it was dissolved in 200 l of water and the bed and slopes of the pond with organic fertilizers on the surface were sprayed. After 24 hours, the pond was filled with water and after 3 days and placed in fish for growing.

Example 2. Prepared in a capacity of 0.2% solution of crotonolactone at the rate of 0.01 mg / l and put snopiki, made of hay for 6 hours. Then snopiki transferred to a pre-flooded reservoir. 50 sheaves, weighing | 2 kg each, were taken to a pond with a spare of 1 ha. The multiplicity of sheaves was two times per month.

Example 3. A 0.2% 45 solution of crotonolactone was prepared at the rate of 0.01 mg / l of water and evenly distributed throughout the water area of the stocked reservoir using a sprayer. The application of the solution of the mole of onolactone was carried out once every 10 days during the vegetative period.

Example 4 Before the fish were transplanted into the pond, it was kept in baths with crotonolactone solution at a rate of 0.1 g / l. Exposure was 72 hours with constant aeration.

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Example 5. Fish were harvested Fish that were grown using blood baths with a solution of crotonolactone of tololactan did not have parasites, at the rate of 0.3 g / l of water. The exposure time for fish in the control ponds is 24 hours with aeration. The degree of damage reached 80%.

Claims (1)

METHOD FOR PREVENTION OF PARASITIC FISH DISEASES, which involves introducing a biologically active substance into water, characterized in that in order to increase the fish organism's resistance to parasite infection, crotonolactone is used as a biologically active substance, and the latter is introduced into the pond or at the rate of 0.01 -0.02 mg per 1 liter of water during the growing season, or in the bath at the rate of 0.1-0.3 g per 1 liter of water once. > 12.102 54