A kind of microbial bacterial agent and its application
Technical field
The invention belongs to microorganism fields, and in particular to be it is a kind of for preventing the microorganism formulations of corps diseases,
The microorganism formulation is safe to the human body in the application, nuisanceless to environment.
Background technology
Biological pesticide refers to each for preventing using living microorganism, botanical pesticide, Secondary Metabolites of Microorganisms etc.
Kind insect and the pesticide variety of disease.Especially microbial pesticide, since microbial resources type potential in nature is enriched,
There is apparent advantage in terms of the product development of microbial pesticide, therefore, countries in the world have all put into a large amount of manpower and wealth
Power is studied, and in China, the development and exploitation of microbial pesticide have become national science and technology public relations and hi-tech development
Plan;Each place government is also using microbial pesticide as a research direction of biological field.
Microbial pesticide is the important guarantor for realizing development proposal adjustment, promoting circular economy and social sustainable development
Barrier, therefore, novel microbial pesticide of the research and development with independent intellectual property right, and other high-tech industries are driven with this, such as
The cooperative development of Fermentation Engineering, preparation processing, field of fine chemical is an important goal of microbial pesticide development.Microorganism
Pesticide not only have the characteristics that efficiently, it is safety, low-residual, degradable, but also microorganism in itself from environment in itself, to environment
Close friend, and microbial action complicated mechanism, action site is more, and general microorganism live bacteria and secondary metabolite can be applied to
Inhibit the growth of harmful organism, thus receive people's concern.At present, actinomyces, bacterium etc. are agriculturally being widely popularized
It uses, although however, carrying out biological control using saccharomycete has had research, that really applies is also less.
Saccharomycete is generally larger to chemical bactericide resistance or even can be used in combination with chemical bactericide, once it screens
To suitable compounding type, the dosage of chemical pesticide can not only be reduced, and can reduce potential to environment and human body
While causing harm, biological control effect is improved.In addition, saccharomycete has, inheritance stability, nutritional requirement is simple, antimicrobial spectrum is wide, raw
Long fireballing feature and stronger tolerance, energy insensitive to most chemical bactericides under various abiotic stress environment and adverse circumstance
With some, chemically or physically method is combined, and becomes the hot spot of microbial control research.
Strawberry is a kind of perennial root, perennial herb resource plant for integrating cultivation and watching.In cultivated strawberry area,
Gray mold, anthracnose, powdery mildew are to hinder the bottleneck of Strawberry industry development, wherein, the harm of grey mould fruit rot of strawberry is the most serious,
Annual strawberry growth period endangers stem, petiole, blade, stipule, the later stage endanger flower and fruit, directly influence yield of strawberry,
Cause very big economic loss.Most of prevention to grey mould fruit rot of strawberry causes soil using chemical pesticide sprinkling plant surface
Different degrees of pesticide residue and pollution problem seriously affect product quality and the health of human body.From preserving the ecological environment
It is punished with the angle of food security, strawberry production needs low toxicity, pollutes few, safe to the human body microorganism formulation to control grass
Certain kind of berries disease so as to achieve the purpose that strawberry safe edible, also complies with biological husbantry development and government, society and biological pesticide industry
Development.
Invention content
Situation about being impacted it is an object of the invention to be directed to grey mould fruit rot of strawberry to strawberry, provides a kind of microorganism live bacteria
Preparation, so as to solve largely to use pesticide residue, Environmental security sex chromosome mosaicism caused by chemical pesticide in the prior art.
Another object of the present invention is to provide the application of the microorganism live bacteria preparation, the microorganism live bacteria preparation is fitted
For preventing grey mould fruit rot of strawberry.
The raw material of microorganism live bacteria preparation that the present invention applies is kluyveromyces marxianus, and the barms can lead to
It crosses commercially available means to be commercially available, the kluyveromyces marxianus used in the present invention is purchased from Shanghai Fu Sheng Industrial Co., Ltd.s.
In order to achieve the above objectives, a kind of microorganism live bacteria preparation is prepared using following steps in the present invention:
1st, kluyveromyces marxianus strain is inoculated into NYDB fluid nutrient mediums, at 28 DEG C, is shaken in 200 r/min
48 h are cultivated in bed;
2nd, cultured saccharomycete bacterium solution under the conditions of 3000 r/min is centrifuged 10 minutes, collects somatic cells, then use
Twice, then washed lower saccharomycete with sterile distilled water and inhaled to beat repeatedly with liquid-transfering gun makes ferment to sterile distilled water washing thalline two or three times
Female bacterium resuspension is counted with blood counting chamber into bacteria suspension, calculates the concentration of yeast bacteria suspension, then adjusted with sterile distilled water
The concentration of bacteria suspension is to 1 × 109 CFU/mL。
Further, the method for application of the microbial bacterial agent is uniformly sprays using the kluyveromyces marxianus
Mist.
Preferably, the microbial bacterial agent of the present invention can be used in compounding with chemical bactericide Boscalid, it is better.
Further, the method for administration of microbial bacterial agent of the invention is that prevention processing is used in premorbid or early stage
Medicine, continuous dispenser three times, are spaced 7-10 days.
Further, when the microbial bacterial agent for using the present invention, crop species, controlling disease depending on application are not
On an equal basis, dosage can change in comparatively wide range.
Compared with prior art, microbial bacterial agent of the invention has the beneficial effect that:
1st, the present invention has widened type of the microorganism formulation for biological control, for the first time by the commercially available known bacterium that can be obtained
Strain finds that it can be used for preventing grey mould fruit rot of strawberry by a large amount of experiment;
2nd, microbial bacterial agent storage properties of the invention are stablized, and control effect is good, the zymotechnique of large-scale production is simple,
Low production cost;
3rd, after microbial bacterial agent of the invention is compounded with Boscalid, the two can perfection coexist, can preferably prevent
Grey mould fruit rot of strawberry;
4th, microbial bacterial agent of the invention is to crop safety, environmentally safe, and efficiency stabilization is more than 45%, with chemistry
Efficiency is more than 85% after fungicide Boscalid compounding, it is possible to reduce the dosage of chemical pesticide.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, present invention specific examples below
It illustrates, but the present invention is limited to absolutely not these examples.As described below is only the preferable embodiment of the present invention, is used only for explaining
The present invention, but cannot be therefore understands that for the limitation to the scope of the claims of the present invention.It should be pointed out that it is all the present invention spirit and
Any modification, equivalent replacement or improvement for being made within principle etc., should all be included in the protection scope of the present invention, therefore,
The protection domain of patent of the present invention should be determined by the appended claims.
Material, reagent used in the embodiment of the present invention etc. unless otherwise instructed, can be bought by commercial sources
It obtains and/or is prepared by known conventional method.
First, the preparation of kluyveromyces marxianus microbial bacterial agent
The preparation method of the kluyveromyces marxianus microbial bacterial agent of the present invention can be prepared via a method which to obtain:
1st, kluyveromyces marxianus strain is inoculated into NYDB fluid nutrient mediums, at 28 DEG C, is shaken in 200r/min
48 h are cultivated in bed;
2nd, cultured saccharomycete bacterium solution under the conditions of 3000 r/min is centrifuged 10 minutes, collects somatic cells, then use
Twice, then washed lower saccharomycete with sterile distilled water and inhaled to beat repeatedly with liquid-transfering gun makes ferment to sterile distilled water exercise thalline two or three times
Female bacterium resuspension is counted with blood counting chamber into bacteria suspension, calculates the concentration of yeast bacteria suspension, then adjusted with sterile distilled water
The concentration of bacteria suspension is to 1 × 109 CFU/mL。
2nd, indoor bioassay
The expection activity that the microbial bacteria suspension of the present invention gives with chemical bactericide Boscalid can be calculated as below(Ginseng
See, Colby, S.R. " Calculating Synergistic and Antagonistic Responses of
Herbicide Combinations”, weed 15, (1967),20-22):
If
X is the effect when the dosage of x is applied as component A,
Y is the effect when the dosage of y is applied as component B,
E is the effect when component A and component B is applied respectively with the dosage of dosage x and y, then
E=X+Y-XY/100
Effect value is in terms of %, and 0% finger effect is equivalent to control, and effect 100% refers to not observe infection.
If practical Fungicidally active is more than calculated value, the activity of the composition is super adduction, that is, there is collaboration and increase
Effect acts on.In the case that secondary, the effect of actual observation rice has to be larger than the expection effect calculated by formula above-mentioned
(E).
1st, grey mould fruit rot of strawberry determination of activity is prevented
To the determination of activity of grey mould fruit rot of strawberry using 50% Boscalid water dispersible granules as comparison medicament(Purchased from BASF
Company), when measuring active protection, by Strawberry seedlings microbial bacterial agent suspension of the present invention and 50% Boscalid water
Dispersible granule is sprayed after being watered dilution, and after hydrojet layer is dried, the aqueous spore suspension of plant grey mould fruit rot of strawberry is inoculated with, it
Afterwards, plant is placed in 20 DEG C with relative humidity to be cultivated in 80% greenhouse.
Inoculation grey mould fruit rot of strawberry spore suspension is evaluated after three days, test group, dosage and result of the test such as table 1
It is shown:
When the microorganism formulation of the present invention is used alone it can be seen from more than result of the test, grey mould fruit rot of strawberry is prevented
It controls and shows certain control effect, when microorganism formulation and the Boscalid effective ingredient consumption 100g/hectare of the present invention
When, control effect can reach 89.7%, show apparent synergistic function, control effect is with 50% Boscalid with effective
200 g a.i./hm of Ingredient Amount2Using when, preventive effect effect is suitable.