Composite plant extract for inhibiting aeromonas schubertii in water environment as well as preparation method and application of composite plant extract

Abstract

The invention belongs to the technical field of water environment bacteriostatic agents, and discloses a composite plant extract for inhibiting aeromonas schubertii in a water environment. The composite plant extract belongs to an environment-friendly substance, has a large safe concentration range on fish bodies, does not cause chemical drug residues in the fish bodies, does not easily cause drug resistance of aeromonas schubertii, and does not damage algae in water. The action spectrum of the compound extract only has a special effect on aeromonas schubertii, and the compound extract can be used for inhibiting abnormal reproduction of aeromonas schubertii in a culture water environment, so that the aggressive force of aeromonas schubertii in the water environment on fish bodies is reduced. From the aspect of formula compatibility, the four components of the compound plant extract have a remarkable compatibility synergistic effect, not only have a good inhibiting effect on aeromonas schubertii in a culture water body, but also have remarkable anti-inflammatory and astringing effects on local red spots on fish body surfaces caused by aeromonas schubertii infection.

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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