A compound plant extract for inhibiting Aeromonas Schubert in water environment and its preparation method and application

Abstract

The invention belongs to the technical field of antibacterial agents for water environment, and discloses a compound plant extract for inhibiting Aeromonas schubertius in water environment. The range is large, and it will not cause chemical residues in the fish body, and it is not easy to cause drug resistance of Aeromonas schubert, and it is not destructive to algae in the water body. The action spectrum of the composite extract of the present invention only has special effects on Aeromonas Schubert, and can be used to inhibit the abnormal reproduction of Aeromonas Schubert in the aquaculture water environment, thereby reducing the impact of Aeromonas Schubert on fish in the water environment. attack power; from the aspect of prescription compatibility, the four components of the compound plant extract of the present invention have significant compatibility and synergistic effects, not only have a good inhibitory effect on Aeromonas schubert in aquaculture water, but also have a good inhibitory effect on Shubert The local red spots caused by Aeromonas burt infection on the fish body surface have obvious anti-inflammatory and astringent effects.

Description

technical field [0001] The invention relates to the technical field of antibacterial agents for water environment, and more specifically, relates to a compound plant extract for inhibiting Aeromonas schubertius in water environment, its preparation method and application. Background technique [0002] Aeromonas schubert is a common opportunistic pathogen, which can cause septicemia and / or visceral knots in fishes of the family Channaidae, which tends to occur in raw fish of old fish shed period of 4-5 months and large body weight stage and the stage of small body weight specifications for 6-8 months after raw fish and new fish are settled in the pond. Once the raw fish is infected, the diseased fish in the same pond are often used as the source of infection, and they often have strong infectivity and high lethality. The highest average daily death rate per mu can exceed 100 fish. Days can quickly and completely control the disease. [0003] According to the principle of in...

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Problems solved by technology

[0003] According to the principle of infectious disease prevention and control, that is, control the source of infection, cut off the route of transmission, and protect susceptible hosts, in current production practice, it is common to prevent and treat Aeromonas schubert by taking sensitive antibiotics orally and disinfecting externally. The antibiotics used in the above scheme will not only cause drug residues and affect food safety, but also easily lead to the rise of pathogenic drug resistance, which brings high difficulty to production and prevention of the disease; spilled disinfectants are mainly used to cut off diseased fish. As the transmission route of the secondary infection source, the dosage is often insufficient due to cost factors and safety upper limit concentration, resulting in the phenomenon that the effect of adjuvant therapy is greatly weakened

In the pre-epidemic or epidemic period of the disease, it is the best way to effectively prevent the outbreak of Aeromonas Schubert's disease by inhibiting the rapid reproduction of Aeromonas Schubertii in water and enhancing the disease resistance of fish. To avoid the phenomenon of rapid spread of the disease after the occurrence of the disease and cause the loss of dead fish, most of the antibacterial agents in the prior art are obtained by compounding chemical substances, which have great potential safety hazards and environmental hazards

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