Composite plant extract for inhibiting vibrio parahaemolyticus 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 water environment vibrio parahaemolyticus, which is mainly prepared from the following components in percentage by mass: 35%-55% of a gerbera piloselloides extract, 30%-42% of a roughhaired holly extract, 5%-12% of a gynura bicolor flower extract and 5-12% of a dandelion extract. Compared with traditional GMP disinfectants, the compound plant extract belongs to an environment-friendly substance, is large in the safety concentration range of shrimps, and has an obvious inhibiting effect on vibrio parahaemolyticus when being used for splashing chemical water and cannot be interfered by organic matters in water; when the use dosage is smaller than or equal to 5 mg / L, abnormal propagation of vibrio parahaemolyticus in upper-layer, middle-layer and bottom-layer culture of a culture water body can be effectively inhibited, and the safety to pelteobagrus fulvidraco, ictalurus punctatus and silurus meridionalis is good.

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 Vibrio parahaemolyticus in water environment, its preparation method and application. Background technique [0002] Vibrio parahaemolyticus is one of the members of pathogenic Vibrio, Gram-negative bacteria, Vibrio family Vibrio genus, mostly arc-shaped, rod-shaped or oval-shaped under the electron microscope, with flagella and capsule, without Spores are widely distributed in saline water bodies such as seawater and saltwater lakes. Vibrio parahaemolyticus grows well on a medium with a salt content of 3%, and does not grow without salt, so it is also called halophilic bacteria. The optimum growth temperature of this bacterium is 37°C, so summer is the season with frequent occurrence of diseases caused by this bacterium. Practice has shown that in high temperature seasons, Vibrio parahaem...

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Problems solved by technology

However, for shrimp farming models with obvious salinity differences, such as earthen ponds and high-level ponds, the regular use of compliant disinfectants and the use of beneficial microecological preparations to prevent and control Vibrio parahaemolyticus in water also have some disadvantages, such as Vibrio parahaemolyticus The increase of drug resistance, the cost increase caused by the use of large doses to ensure the effect, and the damage to the algal phase of the water body caused by the use of large doses to ensure the effect, etc. The components of Vibrio hemolyticus have great economic value and social value for promoting health

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