Bactericidal composition for asparagus stem blight

Abstract

The invention relates to a bactericidal composition for asparagus stem blight, which belongs to the technical field of asparagus stem blight and has good prevention, protection and treatment effects. According to the action mechanism, normal growth of pathogenic bacteria is interfered by inhibiting biosynthesis of ergosterol, a good inhibiting effect on pathogenic bacteria of various plants is achieved, and meanwhile, difenoconazole also has a strong inhibiting effect on spore formation of the pathogenic bacteria of the plants; the chitosan oligosaccharide, the carbendazim, the Chinese herbal medicine active extract, the methanol extract, the plant extract, the difenoconazole, the lentinan and the amino-oligosaccharin lentinan mixed preparation have a good prevention and treatment effect on the asparagus stem blight and can block combination of pathogens and sugar molecules on the surfaces of normal cells through an adhesion effect, so that the infection path of the asparagus stem blight is blocked. The lentinan has potential value in the aspect of preventing and treating the asparagus stem blight, and the lentinan enhances the immune function and blocks the pathogen infection pathway.

Description

Technical Field

[0001] The invention relates to the technical field of asparagus stem blight, in particular to a bactericidal composition for asparagus stem blight. Background Art

[0002] Asparagus (Asparagus officinalis Linn.), belonging to the Liliaceae family and the Asparagus genus, has high nutritional value, can moisten the lungs, relieve cough, and eliminate phlegm, and has the function of inhibiting tumor growth. It is known as the "king of vegetables" in the international market. In recent years, with the expansion of asparagus cultivation area, the occurrence of asparagus stem blight has become more serious year by year, seriously affecting the yield and quality of asparagus.

[0003] The diseased parts of asparagus stem blight are mainly stems and leaves, and gradually spread to the stem. In the early stages of the disease, small milky white spots will appear, and then expand to spindles or oval brown spots. As the lesions spread rapidly, the central part becomes brown and sunken, forming many small black spots (conidiophores), and the surrounding area becomes reddish brown. Infected plants show inhibition at the base of the stem and dry stems and leaves, leading to the rapid death of the entire plant.

[0004] At present, the prevention and control of asparagus stem blight is mainly carried out through field management, field cleaning and spraying of drugs. Among them, drug prevention and control is mostly carried out in the early stage of the field disease, and 50% carbendazim wettable powder, 75% thiophanate-methyl wettable powder, 70% methyl thiophanate wettable powder or 80% mancozeb wettable powder are selected for spraying prevention and control, but the long-term use of the above drugs will make asparagus resistant to drugs and have the disadvantages of unstable efficacy. In addition, the fungicidal composition used for the prevention and control of asparagus stem blight on the market also has the disadvantages of polluting the environment, short duration of efficacy and inability to treat the symptoms and the root cause, and the effect is not ideal. In summary, the development of new pharmaceutical compositions for the prevention and control of asparagus stem blight is particularly important for the development of the asparagus planting industry. Summary of the invention

[0005] The present invention aims to solve the above technical problems and provides a fungicide composition for asparagus stem blight.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] A fungicide composition for treating asparagus stem blight comprises 4-10 parts of chitosan oligosaccharide, 2-8 parts of carbendazim, 20-30 parts of active extracts of Chinese herbal medicines, 10-18 parts of methanol extracts, 5-12 parts of plant extracts, 2-8 parts of spirulina extracts, 3-10 parts of difenoconazole, 8-15 parts of marine biological active oligosaccharides, 4-10 parts of lentinan, 6-12 parts of lipopeptide compounds, 9-15 parts of amino oligosaccharides and adjuvants.

[0008] A fungicide composition for treating asparagus stem blight comprises 6-8 parts of chitosan oligosaccharide, 4-6 parts of carbendazim, 24-28 parts of active Chinese herbal medicine extract, 12-15 parts of methanol extract, 8-10 parts of plant extract, 3-5 parts of spirulina extract, 7-9 parts of difenoconazole, 9-12 parts of marine biological active oligosaccharide, 5-7 parts of lentinan, 7-10 parts of lipopeptide compounds, 11-13 parts of amino oligosaccharide and an auxiliary agent.

[0009] Preferably, the active extract of Chinese herbal medicine is one or a combination of active extract of Peucedanum peucedanum, active extract of Houttuynia cordata, active extract of Phellodendron chinense and active extract of Licorice.

[0010] Preferably, the plant extract is one or a combination of Macleaya cordata plant extract, Anemarrhena asphodeloides extract, Artemisia capillaris extract and Cnidium monnieri plant extract.

[0011] Preferably, the methanol extract is a methanol extract of one or more of Atractylodes macrocephala, Linderae umbellatae, Galla chinensis, Salvia miltiorrhiza root, Rhubarb and Schisandra chinensis.

[0012] Preferably, the lipopeptide compound is surfactin or fengyrin.

[0013] Preferably, the auxiliary agents include dispersants, wetting agents, disintegrants, binders and fillers.

[0014] After adopting the above formula, the present invention has the following advantages:

[0015] The formula of the present invention has good preventive, protective and therapeutic effects. Its mechanism of action is to interfere with the normal growth of pathogens by inhibiting the biosynthesis of ergosterol, and has a good inhibitory effect on pathogens of various plants. At the same time, difenoconazole also has a strong inhibitory effect on the spore formation of plant pathogens. The mixed preparation of chitosan oligosaccharide, carbendazim, active extract of Chinese herbal medicine, methanol extract, plant extract, difenoconazole, lentinan, and amino oligosaccharide lentinan has a good preventive effect on the prevention and treatment of asparagus stem blight, and can also block the combination of pathogens and normal cell surface sugar molecules through adhesion, thereby blocking its infection pathway. This makes lentinan have potential value in preventing and treating asparagus stem blight, and lentinan enhances immune function and blocks pathogen infection pathways.

[0016] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] none DETAILED DESCRIPTION

[0018] Specific embodiments of the present invention will now be mentioned in detail. Although the present invention is described in conjunction with these specific embodiments, it should be appreciated that it is not intended to limit the present invention to these specific embodiments. On the contrary, these embodiments are intended to cover substitutions, changes or equivalent embodiments that may be included in the spirit and scope of the invention defined by the claims. In the following description, a large number of specific details are set forth in order to provide a comprehensive understanding of the present invention. The present invention can be implemented without some or all of these specific details. In other cases, in order not to make the present invention unnecessarily obscure, well-known process operations are not described in detail.

[0019] When used in conjunction with "including," "methods comprising," or similar language in this specification and the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0020] The present invention is further described in detail below in conjunction with the full text.

[0021] In combination with the full text, a bactericidal composition for asparagus stem blight includes 4-10 parts of chitosan oligosaccharides, 2-8 parts of carbendazim, 20-30 parts of active Chinese herbal medicine extracts, 10-18 parts of methanol extracts, 5-12 parts of plant extracts, 2-8 parts of spirulina extracts, 3-10 parts of fenpropimorph, 8-15 parts of marine biological active oligosaccharides, 4-10 parts of lentinan, 6-12 parts of lipopeptide compounds, 9-15 parts of amino oligosaccharides and adjuvants.

[0022] A fungicide composition for treating asparagus stem blight comprises 6-8 parts of chitosan oligosaccharide, 4-6 parts of carbendazim, 24-28 parts of active Chinese herbal medicine extract, 12-15 parts of methanol extract, 8-10 parts of plant extract, 3-5 parts of spirulina extract, 7-9 parts of difenoconazole, 9-12 parts of marine biological active oligosaccharide, 5-7 parts of lentinan, 7-10 parts of lipopeptide compounds, 11-13 parts of amino oligosaccharide and an auxiliary agent.

[0023] The active extract of Chinese herbal medicine is one or a combination of active extract of Peucedanum chinense, active extract of Houttuynia cordata, active extract of Phellodendron chinense and active extract of Licorice.

[0024] The plant extract is one or a combination of Macleaya cordata plant extract, Anemarrhena asphodeloides extract, Artemisia capillaris extract and Cnidium monnieri plant extract.

[0025] The methanol extract is a methanol extract of one or more of Atractylodes macrocephala, Linderae umbellatae, Galla chinensis, Salvia miltiorrhiza root, Rhubarb and Schisandra chinensis.

[0026] The lipopeptide compound is surfactin or fengyrin.

[0027] The auxiliary agents include dispersants, wetting agents, disintegrators, binders and fillers.

[0028] Chitosan oligosaccharides can activate the immune system of asparagus against asparagus stem blight. Chitosan oligosaccharides can activate asparagus's own immune system and awaken the asparagus's inherent defense mechanism, thereby enhancing its disease resistance. This process involves inducing plants to produce resistance proteins and biological enzymes, such as chitinase, chitosanase and 1,3-glucanase, which can decompose the main components of fungal cell walls, thereby inhibiting the growth of pathogens. Induced disease resistance response is produced. Chitosan oligosaccharides induce plants to produce nitric oxide (NO) signals, further enhancing asparagus's defense against diseases and pests. This signal transduction pathway plays a key role in asparagus's disease resistance response. It has a broad-spectrum antibacterial activity. Chitosan oligosaccharides have a broad-spectrum antibacterial activity and can effectively inhibit the growth of a variety of fungi, bacteria and viruses, thereby reducing the occurrence of diseases. In the application of preventing and controlling asparagus stem blight, chitosan oligosaccharides are mixed with active extracts of Chinese herbal medicines, plant extracts and other ingredients to prolong the action time and enhance the sustained release function, significantly improving the prevention and control effect. Chitosan oligosaccharides can not only improve the disease resistance of plants, but also repair crop tissues damaged by diseases and promote the normal growth and development of crops.

[0029] For example, when chitosan oligosaccharide is used alone, its protective effect on asparagus stem blight is 25.37%, and when carbendazim is used alone, its protective effect on asparagus stem blight is 19.91%.

[0030] The active extract of Chinese herbal medicine is one or more combinations of active extract of Peucedanum chinense, active extract of Houttuynia cordata, active extract of Phellodendron chinense and active extract of Licorice. The effect of using the active extract of Chinese herbal medicine alone is 27.46%, but when used in combination with chitosan oligosaccharide or carbendazim, the control effect can be significantly increased to 80%, achieving the technical effect of "1+1>2". In addition, the Chinese herbal raw materials of Peucedanum chinense, Houttuynia cordata and Licorice also play an important role in enhancing the control effect of biological pesticides, and exert a comprehensive control effect through mutual cooperation.

[0031] When the active extracts of Chinese herbal medicine are used in conjunction with chitosan oligosaccharides, carbendazim and fenpropimorph, they can play a role in preventing and treating asparagus stem blight and can significantly promote the prevention and control effect.

[0032] The use of chitosan oligosaccharides, spirulina extract and Chinese herbal extracts together further improves the control effect. These substances achieve the purpose of controlling asparagus stem blight by inhibiting the growth and reproduction of pathogenic bacteria.

[0033] Surfactant and fengyrin, two lipopeptide compounds, showed good antibacterial effects.

[0034] The methanol extracts had high antibacterial activity against bacteria, and the methanol extracts of Galla chinensis, Rhubarb and Schisandra chinensis showed high sensitivity to Aeromonas hydrophila.

[0035] The plant extract is a pure plant high-efficiency fungicide with one or more combinations of Macleaya cordata plant extract, Anemone cyperus extract, Artemisia capillaris extract or Cnidium monnieri plant extract as the main raw materials, and has the characteristics of rapid bactericidal effect and no toxic side effects. The plant extract can play a role in quickly inhibiting asparagus stem blight and can inhibit the recurrence of stem blight for a long time.

[0036] Macleaya cordata plant extract, Admiriella cyrtonema extract, Artemisia capillaris extract or Cnidium monnieri plant extract are when the microbial cell membrane is destroyed by terpenoids and phenolic substances, the permeability of the membrane is changed, and the metal ions are chelated by phenolic and flavonoid compounds, making the alkaloids affect the genetic material, thereby destroying the fungal cell membrane or affecting its genetic material.

[0037] The methanol extract of Salvia miltiorrhiza root showed strong antibacterial activity against 10 common bacteria, among which Staphylococcus epidermidis was the most sensitive, with the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) both being 1.52 mg / mL.

[0038] The complex formed by chitosan oligosaccharide and spirulina extract can kill pathogens deep in the biofilm through electrostatic adsorption.

[0039] Lentinan is a bioactive substance that can enhance humoral and cellular immunity. Its antiviral mechanism may be to improve the immunity of infected cells, enhance the stability of cell membranes, inhibit cell pathology, and promote cell repair. In addition, Lentinan can also block the binding of pathogens to sugar molecules on the surface of normal cells through adhesion, thereby blocking their infection pathways. This makes Lentinan potentially valuable in preventing and treating asparagus stem blight, as Lentinan enhances immune function and blocks pathogen infection pathways.

[0040] Aminoligosaccharides are a plant resistance inducer that regulates the production of plant pathogen-related proteins, phytoalexins and other related disease-resistant substances and the accumulation of secondary metabolites by activating plant surface receptors and signal molecule conduction, thereby preventing viral diseases from penetrating, spreading and transferring in plants. It can quickly activate the immune system of crops, induce genes to synthesize a large amount of disease-resistant enzymes and phytoalexins, and enhance the disease resistance of crops. In addition, amino oligosaccharides also have antibacterial effects. They can bind to anions in bacterial cell walls under acidic conditions to hinder bacterial reproduction, and enter microbial cells through low molecular weight, interfering with the transcription process of genetic factors, causing the complete death of microorganisms.

[0041] Embodiment 1:

[0042] A fungicide composition for treating asparagus stem blight comprises 10 parts of chitosan oligosaccharide, 8 parts of carbendazim, 30 parts of active extracts of Chinese herbal medicines, 18 parts of methanol extracts, 12 parts of plant extracts, 8 parts of spirulina extracts, 10 parts of difenoconazole, 15 parts of marine biological active oligosaccharides, 10 parts of lentinan, 12 parts of fengyuansu, 15 parts of amino oligosaccharides, a dispersant, a wetting agent, a disintegrant, a binder and a filler.

[0043] The Chinese herbal medicine active extract is a combination of various active extracts of yellow peel and active extracts of liquorice.

[0044] The plant extract is a combination of Macleaya cordata plant extract and Cnidium monnieri plant extract.

[0045] The methanol extract is a methanol extract of various combinations from Atractylodes lancea, Salvia miltiorrhiza root, Rhubarb and Schisandra chinensis.

[0046] Embodiment 2:

[0047] A fungicide composition for treating asparagus stem blight comprises 4 parts of chitosan oligosaccharide, 2 parts of carbendazim, 20 parts of active extracts of Chinese herbal medicines, 10 parts of methanol extracts, 5 parts of plant extracts, 2 parts of spirulina extracts, 3 parts of difenoconazole, 8 parts of marine biological active oligosaccharides, 4 parts of lentinan, 6 parts of fengyuansu, 9 parts of amino oligosaccharides, a dispersant, a wetting agent, a disintegrant, a binder and a filler.

[0048] The active extracts of Chinese herbal medicines are a combination of Peucedanum chinense active extract, Houttuynia cordata active extract and Licorice active extract.

[0049] The plant extract is a combination of various extracts of Camphor Tree Vine and Cnidium monnieri.

[0050] The methanol extract is a methanol extract of various combinations from Linderae umbellatae, Galla chinensis and Schisandra chinensis.

[0051] Embodiment three:

[0052] A fungicide composition for treating asparagus stem blight comprises 6 parts of chitosan oligosaccharide, 4 parts of carbendazim, 24 parts of active extracts of Chinese herbal medicines, 14 parts of methanol extracts, 7 parts of plant extracts, 4 parts of spirulina extracts, 7 parts of difenoconazole, 12 parts of marine biological active oligosaccharides, 9 parts of lentinan, 10 parts of surfactin, 12 parts of amino oligosaccharides, a dispersant, a wetting agent, a disintegrant, a binder and a filler.

[0053] The Chinese herbal medicine active extract is a combination of various active extracts of yellow peel and active extracts of liquorice.

[0054] The plant extracts are a combination of Achyranthes bidentata extract and Artemisia capillaris extract.

[0055] The methanol extract is a methanol extract of various combinations of Rhubarb and Schisandra chinensis.

[0056] Embodiment 4:

[0057] A fungicide composition for treating asparagus stem blight comprises 8 parts of chitosan oligosaccharide, 6 parts of carbendazim, 25 parts of active extracts of Chinese herbal medicines, 15 parts of methanol extracts, 9 parts of plant extracts, 4 parts of spirulina extracts, 8 parts of difenoconazole, 12 parts of marine biological active oligosaccharides, 8 parts of lentinan, 10 parts of surfactin, 11 parts of amino oligosaccharides, a dispersant, a wetting agent, a disintegrant, a binder and a filler.

[0058] The active extract of Chinese herbal medicine is the active extract of yellow peel.

[0059] The plant extract is the extract of Camphor Tree Vine.

[0060] The methanol extract is a methanol extract of various combinations from Salvia miltiorrhiza root, Rheum officinale and Schisandra chinensis.

[0061] Embodiment five:

[0062] A fungicide composition for treating asparagus stem blight comprises 9 parts of chitosan oligosaccharide, 7 parts of carbendazim, 22 parts of active extracts of Chinese herbal medicine, 16 parts of methanol extracts, 6 parts of plant extracts, 5 parts of spirulina extracts, 7 parts of difenoconazole, 12 parts of marine biological active oligosaccharides, 6 parts of lentinan, 10 parts of surfactin, 12 parts of amino oligosaccharides, a dispersant, a wetting agent, a disintegrant, a binder and a filler.

[0063] The Chinese herbal medicine active extracts are a combination of Houttuynia cordata active extracts, Phellodendron chinense active extracts and Licorice active extracts.

[0064] The plant extracts are a combination of Macleaya cordata plant extract, Anemarrhena asphodeloides extract, Artemisia capillaris extract and Cnidium monnieri plant extract.

[0065] The methanol extract is a methanol extract of various combinations from Atractylodes lancea, Linderae umbellatae, Galla chinensis, Salvia miltiorrhiza root, Rhubarb and Schisandra chinensis.

[0066] Embodiment six:

[0067] A fungicide composition for treating asparagus stem blight comprises 4 parts of chitosan oligosaccharide, 8 parts of carbendazim, 20 parts of active extracts of Chinese herbal medicines, 18 parts of methanol extracts, 12 parts of plant extracts, 8 parts of spirulina extracts, 8 parts of difenoconazole, 12 parts of marine biological active oligosaccharides, 9 parts of lentinan, 12 parts of fengyuansu, 9 parts of amino oligosaccharides, a dispersant, a wetting agent, a disintegrant, a binder and a filler.

[0068] The active extracts of Chinese herbal medicines are a combination of Peucedanum chinense active extract, Houttuynia cordata active extract, Phellodendron chinense active extract and Licorice active extract.

[0069] The plant extracts are a combination of Macleaya cordata plant extract, Anemarrhena asphodeloides extract, Artemisia capillaris extract and Cnidium monnieri plant extract.

[0070] The methanol extract is a methanol extract of various combinations from Atractylodes lancea, Linderae umbellatae, Galla chinensis, Salvia miltiorrhiza root, Rhubarb and Schisandra chinensis.

[0071] experiment:

[0072] Asparagus stem blight samples were collected, and the asparagus stem blight pathogen strains were isolated and identified using the single spore isolation method.

[0073] Store in a -20℃ refrigerator using filter paper method for future use.

[0074] The growth rate method was used. After the asparagus stem blight pathogen was cultured on PDA medium at 25°C for 7 days, a 5mm diameter punch was used to punch out the bacterial cake, which was inoculated on a PDA plate containing difenoconazole (medium, with 5 replicates for each concentration of the agent. After culturing in a constant temperature incubator at 25°C for 7-9 days, the diameter of the colony was measured using the cross method.

[0075] The test site was selected in Changzhou City, Jiangsu Province, with a plant spacing of 0.25m and a row spacing of 1.5m. The asparagus stem blight was serious in this plot. The test was arranged in random blocks, with each plot covering an area of ​​30m 2 According to the dosage for preventing and controlling asparagus stem blight or other diseases on the label of the drug, the fungicidal compositions of Example 1, Example 2, Example 3, Example 4, Example 5 and Example 6 were respectively taken, and each treatment was repeated 3 times, with the clean water treatment as the control example. The drug was sprayed once every 7 days, for a total of 3 times. The disease situation was investigated 14 days after the last application of the drug, and the control effect was calculated.

[0076] The disease survey was conducted by sampling at five points in each plot, with 100 branched asparagus stalks collected at each point.

[0077] The disease is graded as follows:

[0078] Grade 0: no disease;

[0079] Level 1: The diseased area accounts for less than 5% of the total area;

[0080] Level 3: The diseased area accounts for 5%-15% of the total area;

[0081] Level 5: The diseased area accounts for 16%-25% of the total area;

[0082] Level 7: The diseased area accounts for 26%-50% of the total area;

[0083] Level 9: The affected area accounts for more than 50% of the total area.

[0084] The results are shown in Table 1:

[0085]

[0086] From the above table, it is obtained that the incidence rate of Example 1, Example 2, Example 3, Example 4, Example 5 and Example 6 of the present invention is 2%, and the incidence rate of the control example is 58%. The formula of the present invention has good preventive, protective and therapeutic effects. Its mechanism of action interferes with the normal growth of pathogens by inhibiting the biosynthesis of ergosterol, and has a good inhibitory effect on pathogens of various plants. At the same time, difenoconazole also has a strong inhibitory effect on the spore formation of plant pathogens. Chitosan oligosaccharides, carbendazim, Chinese herbal medicine active extracts, methanol extracts, plant extracts, difenoconazole, shiitake polysaccharides, and amino oligosaccharides shiitake polysaccharide mixed preparations have a good preventive effect on the prevention and treatment of asparagus stem blight, and can also block the combination of pathogens and normal cell surface sugar molecules through adhesion, thereby blocking its infection pathway. This makes shiitake polysaccharides have potential value in preventing and treating asparagus stem blight, and shiitake polysaccharides enhance immune function and block pathogen infection pathways.

[0087] The present invention and its embodiments are described above, and such description is not restrictive. What is shown in the full text is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A fungicidal composition for asparagus stem blight, characterized in that: The invention comprises 4-10 parts of chitosan oligosaccharide, 2-8 parts of carbendazim, 20-30 parts of active extract of Chinese herbal medicine, 10-18 parts of methanol extract, 5-12 parts of plant extract, 2-8 parts of spirulina extract, 3-10 parts of difenoconazole, 8-15 parts of marine biological active oligosaccharide, 4-10 parts of lentinan, 6-12 parts of lipopeptide compounds, 9-15 parts of amino oligosaccharide and auxiliary agents.

2. The bactericidal composition for asparagus stem blight according to claim 1, characterized in that: The invention comprises 6-8 parts of chitosan oligosaccharide, 4-6 parts of carbendazim, 24-28 parts of active extracts of Chinese herbal medicine, 12-15 parts of methanol extracts, 8-10 parts of plant extracts, 3-5 parts of spirulina extracts, 7-9 parts of difenoconazole, 9-12 parts of marine biological active oligosaccharides, 5-7 parts of lentinan, 7-10 parts of lipopeptide compounds, 11-13 parts of amino oligosaccharides and auxiliary agents.

3. The bactericidal composition for treating asparagus stem blight according to claim 1 or 2, characterized in that: The active extract of Chinese herbal medicine is one or a combination of active extract of Peucedanum chinense, active extract of Houttuynia cordata, active extract of Phellodendron chinense and active extract of Licorice.

4. The bactericidal composition for treating asparagus stem blight according to claim 1 or 2, characterized in that: The plant extract is one or a combination of Macleaya cordata plant extract, Anemarrhena asphodeloides extract, Artemisia capillaris extract and Cnidium monnieri plant extract.

5. The bactericidal composition for treating asparagus stem blight according to claim 1 or 2, characterized in that: The methanol extract is a methanol extract of one or more of Atractylodes macrocephala, Linderae umbellatae, Galla chinensis, Salvia miltiorrhiza root, Rhubarb and Schisandra chinensis.

6. The bactericidal composition for treating asparagus stem blight according to claim 1 or 2, characterized in that: The lipopeptide compound is surfactin or fengyrin.

7. The bactericidal composition for treating asparagus stem blight according to claim 1 or 2, characterized in that: The auxiliary agents include dispersants, wetting agents, disintegrators, binders and fillers.

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