476results about How to "Strong antagonistic effect" patented technology

The invention relates to bacillus amyloliquefaciens NCPSJ7 and further relates to an application of the strain in treating plant diseases, diseases before and after harvesting fruits and vegetables as well as in preventing food-borne pathogenic bacteria and putrefying bacteria. The strain is preserved in China Center for Type Culture Collection (CCTCC) on March 22, 2013, wherein the preservation number is CCTCC NO: M2013098 and the strain is named as bacillus amyloliquefaciens NCPSJ7. The thallus and fermentation liquor of the strain disclosed by the invention has the effects of treating plant diseases caused by plant pathogenic fungus including antagonistic peach root rotten disease, fusarium wilt of cucumber, botrytis cinerea, jujube anthracnose, pear black spot, pear blue mould, apple brown rot, apple altermaria leaf spot, watermelon fusarium wilt and the like, as well as diseases after harvesting fruits and vegetables and food-borne pathogenic bacteria and putrefying bacteria including antagonistic staphylococcus aureus, salmonella paratyphi A, vibrio parahaemolyticus, yeast and the like; moreover, the bacillus amyloliquefaciens is broad in spectrum and antibacterial and great in potential in developing novel, efficient and natural biological control and biological preservative and fresh-keeping preparation.

The invention discloses a bacillus megaterium strain X3 and application thereof to plant growth promotion. The bacillus megaterium strain X3 is preserved in the China General Microbiological Culture Collection Center (CGMCC) on May 11, 2015 with the preservation number of CGMCC No.10803, is obtained through separation of indoleacetic acid, has the characteristics of siderophore production, phosphate solubilizing, ammonia producing, salt tolerance and disease suppression, can remarkably promote crop growth and improve corn yield, and meanwhile, can increase the diversity and the abundance of microbes in soil. The bacillus megaterium strain X3 is quick in reproduction, simple in production process, strong in adversity ability, easy to preserve and conductive to industrial production, and can not only prevent and cure soil-borne diseases but also promote plant growth when utilized to prepare a bio-fertilizer, thereby having a wide application prospect.

The invention provides a biocontrol bacterial strain for preventing and treating plant diseases and its bacterial agent, belonging to the field of biological control. The strains used are Gram-negative bacteria, identified as Lysobacter enzymogenes, and the strain code is OH11. Strain OH11 has no flagella but has slippage, can produce various extracellular hydrolytic enzymes including chitinase, β-1,3-glucanase and protease, and can effectively inhibit the growth of fungi and bacteria. The antibacterial zone diameters of strain OH11 against Sclerotinia sclerotiorum and Phytophthora capsici were both greater than 22.0 mm; the antagonism against potato ring rot was stronger, and the diameter of the inhibition zone reached 50 mm. The OH11 strain was inoculated into the seed tank, cultivated to the logarithmic growth phase, and the seed liquid was connected to the production tank for cultivation. The medium used in the production tank was the same as that of the seed tank. The liquid fermentation adopts aerobic submerged fermentation and fed-batch process, the dissolved oxygen is 15%-20%, the fermentation temperature is 30°C, the fermentation time is 72h, and the initial pH value is 7.5. After the fermentation is completed, the culture solution is taken out of the tank and directly packed into liquid dosage forms with plastic packaging barrels or packaging bottles, or subpackaged into solid dosage forms with peat adsorption packaging bags. The biocontrol strain OH11 can effectively control plant pathogenic fungi, bacteria, nematodes and other diseases, and the overall control effect is 50%-70%. In the greenhouse pot experiment, the control effects of OH11 on pepper blight and tomato bacterial wilt reached 83.6% and 86.4%, respectively. Strain OH11 has the characteristics of broad antibacterial spectrum, high activity, and environmental safety. In today's serious pesticide pollution, zymolysobacterium and its bacterial agent will be a good substitute.

The invention belongs to the technical field of agricultural biocontrol, and especially relates to a broad-spectrum disease resistance bacillus and an application thereof. The biocontrol bacillus is classified and named as Bacillus velezensis, and the preservation number is CGMCC. No.15766. The Bacillus velezensis has the advantages of broad antibacterial spectrum, strong antagonistic effect, longlasting period, and effectiveness in inhibition of the growth of crop pathogenic fungi, and can be used in the fields of agricultural biocontrol to prevent and control crop diseases caused by gray mold, blight, anthracnose, stem rot, seedling blight, stalk break, gibberellic disease and other fungi. The Bacillus velezensis can also be used for promoting the growth of crop seeds and seedlings andthe preservation and fresh-keeping of fruits and vegetables. The Bacillus velezensis has the characteristics of strong resistance to ultraviolet and drought, simple preparation method and low cost, isa biocontrol strain with excellent performance, and has good development and application prospects.

The invention relates to bacillus subtillis R31 with broad-spectrum antagonism capacity on plant pathogenic fungi, and in particular provides a bacterial strain (CCTCC NO: M209261) of the Bacillus subtillis R31 as well as growth inhibition action thereof on the plant pathogenic fungi and especially capacity thereof on the biological prevention and control of banana vasicular wilt. The plant endophytic bacillus subtillis is proved to be new bacillus subtillis through obtained 16S rDNA and gyrA and gyrB gene segments as well as BLAST search and comparison on NCBI (National Center of Biotechnology Information) and has better flat antagonism activity on multiple plant pathogenic fungi, better antagonism capacity especially on various soil-borne and vascular bundle diseases, i.e. fusarium oxysporum, rhizoctonia solani, alternaria, and the like, and better prevention and control effect in greenhouses and fields.

The invention discloses application of streptomyces griseoflavus in biological prevention and control of plant diseases, particularly streptomyces griseoflavus NMG6-3-9 CGMCC No. 3441 in biological prevention and control of plant diseases. The provided strains have good antagonism effect on pathogenic bacteria of alfalfa root rot, can be used for the biological prevention and control of alfalfa root rot and other plant diseases, and have wide application potential in the field of biological prevention and control of plant diseases. The invention lays a foundation for the biological prevention and control of alfalfa root rot and further provides a scientific basis for the development and the application of a biological prevention actinomycete preparation.

The invention discloses an antibiotic Bacillus amyloliquefaciens with powerful bacteriostasis and wide bactericidal spectrum. The strain has been preserved in the China General Microbiological Culture Collection Center and the taxonomy name of the strain is: Bacillus amyloliquefaciens with preservation number CGMCCNo.4777. The antibiotic Bacillus amyloliquefaciens has powerful bacteriostasis, wide bactericidal spectrum, high inhibition rate up to above 93.5% on the rice blast fungus, the Botrytis cinerea and the Phytophthora parasitica; the Bacillus amyloliquefaciens also has very strong stress resistance, and very strong resistance to the acid and alkali, and is suitable to be used as microbial bactericide.

The invention relates to a bacillus subtilis str.TR21 (hereinafter referred to as 'TR21') strain having broad-spectrum antagonism to plant pathogenic fungi, in particular to the bacillus subtilis TR21 strain and a growth inhibition function thereof on the plant pathogenic fungi. The bacillus subtilis TR21 strain provided by the invention is preserved in China Center for Type Culture Collection (CCTCC) in January 20, 2010 with a preservation number of CCTCC No: M2010019, wherein the China Center for Type Culture Collection is located in Wuhan University, Lojia Mountain, Wuchang, Hubei, China. The strain provided by the invention is proved by obtained gene segments 16S rDNA, gyrA and gyrB and BLAST search and comparison on NCBI to be a novel bacillus subtilis strain having relatively higher flat antagonistic activity to a plurality of plant pathogenic fungi, particularly having high antagonism to various soil borne vascular diseases, such as fusarium oxysporum, rhizoctonia solani, alternaria and the like, and having good prevention and control effects shown in fields.

The invention discloses a trichoderma spore powder as well as a preparation method and application thereof. The trichoderma spore powder contains trichoderma spore powder and a drying aid, wherein the trichoderma spore powder is the spore powder of Trichoderma sperellum T1 which is preserved in the general microorganism center of CCCCM (China Committee for Culture Collection of Microorganisms) and has the preservation number of CGMCC NO: 3531 and a rDNA ITS region segment sequence shown in SEQ ID NO:1; the drying aid is one or more of beta-cyclodextrin, potato starch and soluble starch. The trichoderma spore powder has an effective prevention and control effect on banana vasicular wilt, and has a remarkable antagonism effect on various pathogenic funguses, especially on soil-borne funguses. The preparation time is saved with the preparation method of the trichoderma spore powder, which can be used for preparing the trichoderma spore powder which has high density, high germination rateand high drying efficiency and is easy to store, transport and use.

The invention discloses bacillus velezensis HNt7 with broad-spectrum antibacterial activity as well as a preparation method and application. The antagonistic bacterium bacillus velezensis HNt7 has a number of CCTCC (China Center for Type Culture Collection) M 2018022. The preparation method comprises the following steps: A, selecting a bacillus velezensis HNt7 strain individual bacterial colony under a sterile condition and inoculating into a culture medium; adjusting the temperature and carrying out shake culture; B, filling a fermenting solution into each bottle and adding individual bacterial colony bacterium liquid according to the ratio; putting the bottle into a large-amplitude constant-temprature freezing shaking table and carrying out the shake culture; C, separating the antagonistic bacterium: immersing with alcohol with concentration and rinsing with sterile water; carrying out dark culture in a culture box and transferring a grown bacterial colony into a new culture medium and carrying out lineation separation and purification on the bacterial colony; D, after separating and purifying, obtaining the bacillus velezensis HNt7. The bacterium is used for preparing a medicinefor treating or preventing pear fruit rot disease. The strain has a remarkable disease-prevention effect and the prevention effect reaches 70.76 percent or more. After the bacillus velezensis HNt7 isapplied to pear trees, advanced defoliation of the pear trees is remarkably inhibited and the tree vigor is easy to enhance.

The invention provides application of Bacillus velezensis NZ-4 to promotion of vegetation. The fermentation broth of the bacterial strain NZ-4 can substantially promote the growth of potato plants. The Bacillus velezensis NZ-4 and a microbial strain thereof are of great significance to prevention and treatment of soil borne diseases and successive cropping obstacles in the farmland of China, to sustainable yield increase of grain and to the protection of the ecological environments of farmland.

The invention discloses bacillus methylotrophicus F7 and an application thereof. The invention aims at providing a strain which has a plurality of beneficial properties, namely producing siderophore, cellulase and protease, producing auxin, producing ammonia and the like; the strain not only can be used for effectively inhibiting various pathogenic bacteria such as ralstonia solanacearum, fusarium oxysporum f.sp.cubense, colletotrichum gloeosporioides, fusarium oxysporum f.sp cucumerinum but also can promote plant growth. In accordance with the technical scheme, the bacillus methylotrophicus F7 is preserved in China General Microbiological Culture Collection Center (CGMCC) on February 1, 2016, with preservation number of CGMCC No.12124; in addition, five surfactin homologs, six fengycin homologs and three iturin homologs, which have an antibacterial effect, are extracted from fermentation liquid of the bacillus methylotrophicus F7; and the bacillus methylotrophicus F7 belongs to the field of agricultural biotechnology.

The invention discloses a streptomyces microflavus. The streptomyces microflavus is the streptomyces microflavus NMG2-4-8, and the preservation number thereof is CGMCG No.3442. The streptomyces microflavus is separated and screened from alfalfa healthy tree rhizosphere soil for the first time in the invention, and experiments prove that the streptomyces microflavus has remarkable antagonistic action for 18 pathogenic fungi and 9 bacteria and broad antibacterial spectrum. The streptomyces microflavus has strong inhabiting action for crop pathogenic bacteria, such as alfalfa downy mildew and the like, shows a good disease prevention effect for the alfalfa downy mildew, powdery mildew, brown spots, stemphylium leaf spot disease, root rot disease and the like, and indicates that the bacterial strain has broad application prospect in the biological prevention and cure fields of alfalfa diseases.

The invention provides pseudomonas chlororaphis for preventing and treating the crop fusarium disease and applications thereof. The preservation number of the pseudomonas chlororaphis is CGMCC No. 7729. The Pcho01 bacterium strain of the pseudomonas chlororaphis has a high effective antagonistic action, is capable of being applied to the preventing and treating wheat scab caused by fusarium, and the preventing and treating efficiency in the field is maintained above 60%. The Pcho01 bacterium strain also has a very good antagonistic action on botrytis cinerea, rice sheath blight fungus, bipolaris maydis, pythium wltmum, rhizopus, and pseudomonas solanacearum, and can be used to prevent and treat the diseases caused by those bacteria mentioned above.

The invention provides an antagonistic bacterium for controlling radix rehmannia root rot. The antagonistic bacterium is named as pseudomonas aeruginosa LK-12 (the Preservation No.: CGMCC 10966) after authentication. The pseudomonas aeruginosa LK-12 disclosed by the invention is obtained by screening from continuous cropping rhizosphere soil of radix rehmannia root through an agar disk diffusion method. Fusarium oxysporum and aspergillus flavus pathogenic bacteria separated from lesion parts of the radix rehmannia root have a high antagonistic effect; in the meanwhile, fusarium oxysporum, fusarium moniliforme, talaromyces sp. and other pathogenic bacteria separated from lesion parts of radix pseudostellariae also have a remarkable restriction effect and can be used for effectively controlling root rot diseases of medicinal plants comprising the radix rehmannia root to provide a strain for overcoming or relieving replant diseases of the medicinal plants. Therefore, the antagonistic bacterium is a potential biological control strain which is good in biological control effect, free of pollution as well as safe and ecological, and is wide in development and application prospects.

The invention discloses a bacillus amyloliquefaciens D2WM as well as a preparation method and application of bacillus amyloliquefaciens D2WM. The bacillus amyloliquefaciens D2WM comprises the steps of A, bacillus separation and purification, namely collecting after inoculating a slope; B, preliminary screening of bacillus, namely sequentially selecting strains having antagonistic effects on Erwinia and camellia oleifera diseases by using a point connection method and a plate confrontation method; and C, secondary screening of bacillus, namely culturing the preliminarily-screened strains with the antagonistic effects in an LB liquid culture medium by using a cup-plate method, and screening the strains simultaneously having the antagonistic effects on main diseases of Erwinia and camellia oleifera through an antagonistic bacterium fermentation liquid and sterile filtrate. When being applied to preparation of drugs for treating or preventing soft rot of vegetables and camellia oleifera diseases, the bacillus amyloliquefaciens has a broad-spectrum antagonistic effect, high in growth speed, capable of efficiently antagonizing anthracnose of camellia oleifera, leaf spot diseases of camellia oleifera, black spot of camellia oleifera, canker of camellia oleifera and various diseases and remarkable in antibacterial effect, the culture time for general bacteria and fungi is greatly shortened, and the production cost is reduced.

The invention discloses bacillus velezensis (Bacillus velezensis) for preventing and treating rice blast and the application of the bacillus velezensis, and belongs to the technical field of microorganisms. The bacillus velezensis (Bacillus velezensis) E69 disclosed by the invention is preserved in China General Microbiological Culture Collection Center (CGMCC) of China Committee for Culture Collection of Microorganisms, the preservation date is 5 September, 2018, and the preservation number is CGMCC NO.16427. The bacillus velezensis E69 provided by the invention can prevent and treat rice blast of rice, the new field of application of the bacillus velezensis is opened up, and the bacillus velezensis has good preventing effects on the rice blast of the rice, has significant bacterium restraining effects on various plant pathogenic bacteria, is high in preventing and treating efficiency, has good effects of preventing and treating the rice blast of the rice having different varieties inthe south and the north of China, and can reduce the yield loss of rice industry caused by plant diseases which arise suddenly near the collection period of the rice to a larger extent.

The invention discloses bacillus velezensis strain HN03 and application thereof. The bacillus velezensis strain HN03 has the accession number CCTCC M 2018084. The pure bacillus velezensis strain HN03has a good inhibitory effect on banana fusarium No. 1 and No. 4 physiological strains, and various other pathogenic bacteria.

The invention provides Tequila bacillus WM031 collected under number of CCTCC NO:M2016021. The Tequila bacillus can be stably planted in a watermelon plant and can effectively prevent watermelon wilt; when in use, the Tequila bacillus can be prepared into bacterial liquid with bacterial content of 1010 cfu / mL, and root irrigation is performed on watermelon seedlings in field to achieve the objective of preventing watermelon wilt. The Tequila bacillus is high in prevention effect, simple and convenient to use and suitable for large-scale popularization and application.

The invention relates to a Bacillus velezensis, and a micro-ecological preparation and preparation method thereof. The Bacillus velezensis is preserved in China Center for Type Culture Collection, hasa strain preservation number of CCTCC NO: M 2019218, and is classified and named as Bacillus velezensis BvL03, and the Latin academic name is Bacillus velezensis BvL03. The micro-ecological preparation suitable for aquiculture prepared by the strain has broad-spectrum effect of inhibiting fish pathogenic bacteria through drug-delivery routes such as feed addition, water body sprinkling or intraperitoneal injection, and the protection rate reaches 85 percent. After acting on fish bodies, the preparation can effectively prevent fish pathogenic bacteria such as aeromonas hydrophila from infecting freshwater fishes such as grass carps and crucian carps, and particularly has the best protection effect on grass carps.

The invention relates to a biocontrol strain Y-1 for preventing and controlling fungal diseases of grapes and application of the biocontrol strain Y-1 in prevention and control of grape diseases and belongs to the technical field of biological prevention and control of plant diseases. The strain is Meyerozyma guilliermondii Y-1 with a preservation number of CCTCC (China Center For Type Culture Collection) NO:M2015814. The Meyerozyma guilliermondii Y-1 is used for preparing a biocontrol preparation for preventing and controlling the grape diseases, and the biocontrol preparation has an obviousprevention and control effect on multiple pathogenic fungi. The Meyerozyma guilliermondii Y-1, provided by the invention, as an active ingredient of the biocontrol preparation, has the characteristicsof stable prevention and control effect, long persistence and wide disease control spectrum as well as has the properties of environment friendliness, safety and low possibility of generating pesticide resistance; the strain has high propagation speed, is cultured under simple culture conditions and is easy for storage and industrial production; defense related enzyme activity in plant bodies canbe improved, and a good development and application prospect is realized.

The invention discloses a bacillus cereus, and preparation and application of the bacillus cereus. A bacillus cereus strain Aj080319IA-16 is separated from an intestinal tract of a wild stichopus japonicus selenka and collected in China Center for Type Culture Collection (CCTCC) along with a collection number of CCTCC M 2010315. The screened bacillus cereus has remarkable antagonistic action on pathogenic bacteria of a sea cucumber, and has the effects of increasing the growth speed, immunity and intestinal digestive enzyme activity of the stichopus japonicus selenka. The screened bacillus cereus is safe and non-toxic for the sea cucumber, fast in breeding speed, easy to culture and strong in adaptability on environment, and is capable of being bred quickly to form predominant bacteria. The researched and developed microbiological preparation is simple and convenient to use and operate and only needs to be added into a feed for feeding, so that the preparation is suitable for young stichopus japonicus selenka breeding and disease control in a variety of stichopus japonicus selenka breeding processes. By means of the preparation, the use of antibiotics can be reduced or replaced, and an important role is played in reducing chemical residues, improving the product quality of the sea cucumber and guaranteeing the food safety.

The invention belongs to the technical field of agricultural microbiology, and relates to the fields of biochemistry and molecular biology simultaneously. Through separation, a bacillus amyloliquefaciens strain CH1 for producing a growth-promoting fungus apoptosis lipopeptide is obtained, which is preserved in the China Center for Type Culture Collection (CCTCC) with the preserving number of CCTCC: M208127. A bioactive substance is obtained from a culture of the bacillus amyloliquefaciens strain CH1 and is characterized as the growth-promoting fungus apoptosis lipopeptide. The molecular weight of the lipopeptide is 1,065 or a homologue thereof. The lipopeptide has an infrared spectrum as shown in Figure 6 in the instruction and consists of 9 carbon alkyls and 8 amino acids, wherein the seventh alkyl carbon and the last amino acid form a cyclic peptide through an oxygen atom. The bacillus amyloliquefaciens strain and the lipopeptide prepared from the same are tested on the biological application prospect in apoptosis.

The invention discloses a saprolegnia antagonist and application thereof. The saprolegnia antagonist can be used as a biological medicinal source of a mountain-green-substituted medicament, can reduce environmental pollutions and can meet the requirements of biological prevention and control of fish water mildew. The saprolegnia antagonist Sh1 provided by the invention belongs to Bacillus amyloliquefaciens, and has the collection number of CCTCC NO: M2010129. The active ingredients of the novel antagonist provided by the invention are high in stability, high in antagonist capability, safe, effective and stable; moreover, the antagonist can be produced by a conventional production process and a conventional production flow, and is low in popularization and use cost.

The invention provides new burkholderia cenocepacia and application thereof. The bacterium is identified as new burkholderia cenocepacia and is named as Burkholderia cenocepacia CJ-P8 with the collection number of CGMCC NO.12119. The new Burkholderia cenocepacia CJ-P8 disclosed by the invention is obtained by screening from radix pseudostellariae rhizosphere soil by adopting a plate confrontation process, respectively has a strong antagonistic effect on radix pseudostellariae soil-borne pathogens such as fusarium oxysporum and fusarium moniliforme which are obtained through separation in an early stage, and has no pathogenicity on other crops in a radix pseudostellariae producing area. The invention also provides an optimal medium for growth of the antagonistic bacterium, an optimal formula is 1 / 4 LB+1 / 80 MS (does not contain ferric salt)+0.1wt% of brown sugar, and fermented liquid has an obvious antagonistic effect. The antagonistic strain provided by the invention can be used for effectively preventing and treating soil-borne diseases of radix pseudostellariae and is pollution-free, ecological and safe, thereby having good application prospects.

The invention discloses a dihydropyrimidine compound as well as a preparation method and an application thereof, and belongs to the technical field of medicinal chemistry. The structure of the dihydropyrimidine compound provided by the invention is as shown in a formula I in the specification. The preparation method provided by the invention comprises the following steps: carrying out substitution reaction on a compound a and a compound k under the catalysis of alkali to generate a compound b; performing substitution reaction on the compound c and the compound d under an alkaline condition to obtain a compound e; carrying out Mitsunobu reaction on the compound e and f to obtain an intermediate g, and carrying out coupling reaction on the compound g and b to generate a compound h. The invention provides the application of the compound shown in the formula I or salt, solvate, allomer, metabolite, nitric oxide and prodrug thereof in preparation of drugs for treating or preventing P2X3 and / or / P2X2 / 3 receptor related diseases. The dihydropyrimidine compound disclosed by the invention has a good P2X3 receptor antagonism effect and better safety.

The invention discloses streptomyces hydrogenans OsiLf-2 capable of effectively antagonizing magnaporthe oryzae in vitro. The strain is collected in CGMCC (China general microbiological culture collection center), with the collection number of CGMCC No. 11673. Streptomyces hydrogenans OsiLf-2 has a good antagonistic effect on magnaporthe oryzae of at least five different physiological races in vitro. Fermentation broth of streptomyces hydrogenans OsiLf-2 also has a relatively high antagonistic effect on magnaporthe oryzae, and the antibacterial activity is very stable. Streptomyces hydrogenans OsiLf-2 and the fermentation broth have great application potential in biological prevention of rice blast, development of novel, safe, nontoxic and environment-friendly pesticides and the like.

The invention discloses a dihydropyrimidine compound as well as a preparation method and application thereof, belongs to the technical field of medicinal chemistry, and solves the problems of poor effect and large adverse reaction of a P2X3 receptor inhibitor in the prior art. The structure of the dihydropyrimidine compound is as shown in a formula I in the specification. The invention further provides a preparation method of the compound shown in the formula I and application of the compound in preparation of drugs for treating or preventing P2X3 and / or P2X2 / 3 receptor related diseases. The dihydropyrimidine compound provided by the invention has good affinity with P2X3, has a relatively strong antagonistic effect on a P2X3 receptor, and is safe and effective.

The invention relates to an antagonistic bacterium for preventing the fungal diseases of broccoli as well as a preparation method and the application of a microbial preparation of the antagonistic bacterium, and belongs to the field of biological prevention and treatment of crop diseases. The invention provides a strain of brevibacillus brevis BBC-3 with the collection number CGMCC No. 9622, a production method of a microbial preparation containing the brevibacillus brevis, and also the application of the brevibacillus brevis BBC-3 or the microbial preparation in preventing and treating the fungal diseases of the broccoli. The brevibacillus brevis BBC-3 with the collection number CGMCC No. 9622 is obtained by virtue of preliminary screening and secondary screening, wherein a plate opposing test is performed for the preliminary screening and a liquid fermentation liquid is adopted for the secondary screening; the brevibacillus brevis BBC-3 is capable of effectively preventing and treating a plurality of fungal diseases of the broccoli, such as gray mold, downy mildew, stalk break, black rot and black spot, and has the prevention and treatment efficiency of above 70%; in addition, the brevibacillus brevis BBC-3 is good in environmental safety and has excellent development application prospect.

The invention relates to a fish-sourced aeromonas hydrophila disease antagonistic strain and an application of the antagonistic strain and belongs to the field of aquaculture technology. A fish-sourced aeromonas hydrophila disease antagonistic strain is screened out, cultivated and added into a feed or a medicine as probiotics. The antagonistic strain is a novel antagonistic strain which is high in biological activity stability and high in specificity, is safe for cultured fish and environment, can be used as the probiotics strain for preventing and treating aeromonas hydrophila caused explosive hemorrhagic disease in large freshwater fish farming, and can be used as the main strain to prepare a microbial preparation.