Composition for preventing and treating rice sheath blight disease and preparation method thereof

Abstract

The invention relates to the technical field of biological prevention and treatment, and discloses a composition for preventing and treating rice sheath blight disease, which is prepared from the following raw materials in parts by weight: 80 to 90 parts of validamycin, 30 to 45 parts of traditional Chinese medicine extract paste, 10 to 20 parts of traditional Chinese medicine raw medicine, 15 to 19 parts of white carbon black, 10 to 17 parts of copper sulfate, 12 to 16 parts of chitosan, 9 to 15 parts of gibberellin, 5 to 9 parts of tebuconazole, 1 to 5 parts of compound sodium nitrophenolate, 2 to 4 parts of emulsifier and 1 to 3 parts of synergist. Gleditsia sinensis, sanguisorba officinalis, flos rhododendri mollis and sapindus mukorossi peel in the traditional Chinese medicine raw medicines are used for synergistically killing bacteria, enhancing the immunity of plants and delaying the decomposition of validamycin, and meanwhile, extracts of honeysuckle, dandelion, croton and artemisia annua in the traditional Chinese medicine extract are complementary with validamycin in the aspects of sterilization, virus resistance and plant resistance improvement; therefore, the effect of validamycin is more durable, the duration of single application is longer, and the manpower and material resource cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of biological control, in particular to a composition for preventing and controlling rice sheath blight and a preparation method thereof. Background Art

[0002] Rice sheath blight is a common rice disease caused by Rhizoctonia solani, a fungus belonging to the subphylum Ascomycota. It initially manifests as small dark green water-soaked spots near the water surface on the leaf sheath, which later expand to become oval or cloud-shaped, with gray-green or gray-brown in the middle. When the humidity is high, the center is light yellow or grayish white, and the edges are dark brown. In severe cases, multiple spots fuse, the leaf sheath dries up, and the infected leaves also become cloud-like, with yellowing edges. When the disease develops quickly, they are dirty green and easy to rot. The symptoms of stem damage are similar to those of leaves, and they are yellow-brown and easy to break in the later stage. When the disease occurs, it will affect the heading and filling of rice, reduce the number of grains per ear, make the grains not full, and reduce the thousand-grain weight, ultimately leading to a significant drop in rice yield.

[0003] Currently available compositions for preventing and controlling rice sheath blight mostly use Jinggangmycin as raw material, but the effective period of this raw material is short, usually only about one week, and multiple applications are required to achieve a good prevention and control effect, which increases manpower and material costs. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a composition for preventing and controlling rice sheath blight and a preparation method thereof, which solves the problem that the short effective period requires multiple applications and increases manpower and material costs.

[0005] To achieve the above objectives, the present invention is implemented through the following technical scheme: a composition for preventing and treating rice sheath blight, comprising the following raw materials in parts by weight: 80-90 parts of Jinggangmycin, 30-45 parts of Chinese medicine extract paste, 10-20 parts of Chinese medicine original medicine, 15-19 parts of white carbon black, 10-17 parts of copper sulfate, 12-16 parts of chitosan, 9-15 parts of gibberellins, 5-9 parts of tebuconazole, 1-5 parts of sodium nitrophenolate, 2-4 parts of emulsifier and 1-3 parts of synergist.

[0006] Preferably, the Chinese medicine extract paste includes 8-45 parts of honeysuckle, 12-19 parts of dandelions, 7-13 parts of croton, 7-12 parts of artemisia annua, 8-14 parts of pokeweed, 6-10 parts of perilla leaf oil, 10-15 parts of turpentine and 5-9 parts of eucalyptus oil.

[0007] Preferably, the Chinese herbal medicine comprises 24-32 parts of Gleditsia sinensis, 24-32 parts of Sanguisorba officinalis, 15-22 parts of Wolfberry herb, 15-22 parts of Sapindus mukorossi and 5-12 parts of Tourmaline.

[0008] Preferably, the Chinese medicine extract paste comprises the following preparation steps:

[0009] Mix honeysuckle, dandelion, croton, artemisia annua, and pokeweed;

[0010] Add 25-35wt% ethanol aqueous solution in an amount of 5-6 times the weight of honeysuckle to the above mixture;

[0011] Soak at room temperature for 4 to 5 hours;

[0012] Raise the temperature to 70-85°C and keep warm for 3-5 hours;

[0013] The filtrate is collected and concentrated into a paste under a pressure of 0.1 to 0.7 MPa and a temperature of 70 to 78°C;

[0014] Add perilla leaf oil, turpentine oil and eucalyptus oil dropwise in sequence and stir for 20 to 30 minutes to obtain a Chinese medicine extract paste.

[0015] Preferably, the preparation of the Chinese medicine raw material comprises the following steps:

[0016] Firstly, Gleditsia sinensis, Sanguisorba officinalis, Herba Lycopodii and Soapberry bark are mixed to obtain a mixture a;

[0017] Add 5 to 6 times the weight of the Chinese medicine raw material water to the mixture a and boil for 2 to 4 times, each time for 1 to 1.5 hours, and control the temperature at 90 to 100°C;

[0018] After filtering, the filtrate is concentrated under reduced pressure and spray-dried to obtain a mixture b;

[0019] Add 70% to 80% ethanol, which is 7 to 8 times the weight of the Chinese medicine raw material, to the residue after water extraction, and heat and reflux and extract at 50 to 60°C for 2 to 4 times, each time for 2 to 3 hours;

[0020] The filtrate was concentrated under reduced pressure and spray-dried to obtain a mixture c;

[0021] The raw tourmaline stone is crushed, ball-milled, and sieved to obtain tourmaline fine powder;

[0022] The prepared mixture b and mixture c are mixed, ball-milled, sieved, and then mixed with tourmaline fine powder to obtain the original Chinese medicine.

[0023] A method for preparing a composition for preventing and controlling rice sheath blight, the method comprising the following steps:

[0024] S1, putting Jinggangmycin, white carbon black, copper sulfate, chitosan, gibberellin, tebuconazole, sodium nitrophenolate, emulsifier and synergist into a stirring device for preliminary mixing to obtain a mixture F, and then adding the prepared Chinese medicine extract paste and Chinese medicine original medicine into the stirring device;

[0025] S2, then, stirring the mixture F with the Chinese medicine extract paste and the Chinese medicine original medicine at a speed of 300 to 500 revolutions per minute for 20 to 30 minutes;

[0026] S3, slowly add the solvent while stirring to gradually dissolve the mixture;

[0027] S4. Continue stirring at the same stirring speed for 10 to 15 minutes to mix the solution evenly, and finally obtain a composition solution for preventing and controlling rice sheath blight.

[0028] Preferably, the stirring device maintains an internal temperature of 20-30° C. during the stirring process.

[0029] Preferably, in S3, the solvent is deionized water.

[0030] Preferably, in S4, agglomeration occurs in the mixture during the stirring process, and the stirring speed is increased to 550-600 rpm.

[0031] The present invention provides a composition for preventing and treating rice sheath blight and a preparation method thereof. The composition has the following beneficial effects:

[0032] 1. The present invention uses the synergistic sterilization of the components of Gleditsia sinensis, Sanguisorba officinalis, Herba Lysimachiae and Soapberry bark in the original Chinese medicine to enhance the immunity of the plant and delay the decomposition of Jinggangmycin. At the same time, the extracts of Honeysuckle, Taraxacum officinale, Croton tiglium and Artemisia annua in the Chinese medicine extract paste complement Jinggangmycin in terms of sterilization, antiviral and improving plant resistance, thereby making the effect of Jinggangmycin more lasting, the duration of a single application of the drug is longer, and the cost of manpower and material resources is saved.

[0033] 2. The present invention enhances the immunity and stress resistance of rice through the original Chinese medicine. The Chinese medicine extract paste is rich in a variety of biologically active substances, which helps to improve the stress resistance of rice. It also uses gibberellins and sodium nitrophenolate to promote the growth of rice, improve its vitality and stress resistance, and while preventing and treating sheath blight, it has a certain enhancing effect on the overall stress resistance of rice, thereby improving the survival ability of rice in adverse environments.

[0034] 3. The present invention adopts low-toxic active ingredients and environmentally friendly raw materials, which reduces the pollution to soil, water and ecosystems and is conducive to the sustainable development of agriculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The present invention is a schematic flow chart of the preparation steps of a composition for preventing and controlling rice sheath blight;

[0036] Figure 2 The present invention is a schematic diagram of the steps of preparing a composition for preventing and controlling rice sheath blight. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example:

[0039] Please see attached Figure 1 The embodiment of the present invention provides a composition for preventing and controlling rice sheath blight, comprising the following raw materials in parts by weight: 80-90 parts of Jinggangmycin, 30-45 parts of Chinese medicine extract paste, 10-20 parts of Chinese medicine original medicine, 15-19 parts of white carbon black, 10-17 parts of copper sulfate, 12-16 parts of chitosan, 9-15 parts of gibberellins, 5-9 parts of tebuconazole, 1-5 parts of sodium nitrophenolate, 2-4 parts of emulsifier and 1-3 parts of synergist.

[0040] The Chinese medicine extract paste comprises 8-45 parts of honeysuckle, 12-19 parts of dandelion, 7-13 parts of croton, 7-12 parts of artemisia annua, 8-14 parts of pokeweed, 6-10 parts of perilla leaf oil, 10-15 parts of turpentine oil and 5-9 parts of eucalyptus oil.

[0041] The original Chinese medicine includes 24-32 parts of sapodilla, 24-32 parts of sanguisorba officinalis, 15-22 parts of wolfsbane, 15-22 parts of soapberry bark and 5-12 parts of tourmaline.

[0042] Jinggangmycin has a good preventive and therapeutic effect on rice sheath blight.

[0043] Chinese herbal extract paste:

[0044] Honeysuckle has the effects of clearing away heat and detoxifying, and antibacterial and anti-inflammatory;

[0045] Dandelion has the effects of clearing away heat and detoxifying, reducing swelling and dispersing nodules, and has an inhibitory effect on bacteria;

[0046] Croton, which has certain insecticidal and antibacterial effects;

[0047] Artemisia annua, which has antibacterial and antiviral properties;

[0048] Phytolacca, which has some antibacterial and anti-inflammatory effects;

[0049] Perilla leaf oil, which has antibacterial, anti-inflammatory and antioxidant effects;

[0050] Turpentine, which helps enhance the penetration of the agent;

[0051] Eucalyptus oil has antibacterial, insecticidal and anti-inflammatory properties.

[0052] Chinese herbal medicine:

[0053] Gleditsia sinensis has insecticidal and antibacterial effects;

[0054] Sanguisorba officinalis has the effects of cooling blood and stopping bleeding, clearing away heat and detoxifying, astringing and stopping diarrhea, and enhancing the resistance of the plant;

[0055] The herb has insecticidal and antibacterial effects;

[0056] Soapberry peel, which has antibacterial and anti-inflammatory properties;

[0057] Tourmaline raw stone helps regulate the growth environment of plants;

[0058] Silica, as a filler and dispersant, helps improve the stability and dispersibility of the formulation;

[0059] copper sulfate, which has bactericidal and fungicidal properties;

[0060] Chitosan can induce resistance in plants and enhance their defense capabilities;

[0061] Gibberellins, which promote plant growth and development;

[0062] Tebuconazole, a highly effective and broad-spectrum fungicide;

[0063] Sodium nitrophenolate promotes cell protoplasm flow, improves cell vitality, and accelerates plant growth and development;

[0064] Emulsifiers, which make different ingredients mix evenly and form a stable emulsion;

[0065] Synergist: enhances the control effect of pesticides and improves their efficacy.

[0066] By mixing the Jinggangmycin, the Chinese herbal medicine and the Chinese herbal medicine extract paste, the Chinese herbal medicine and the Chinese herbal medicine extract paste react with the Jinggangmycin, thereby prolonging the lasting effect of the Jinggangmycin and reducing the number of times the medicine is applied.

[0067] The Chinese medicine extract paste comprises the following preparation steps:

[0068] Mix honeysuckle, dandelion, croton, artemisia annua, and pokeweed;

[0069] Add 25-35wt% ethanol aqueous solution in an amount of 5-6 times the weight of honeysuckle to the above mixture;

[0070] Soak at room temperature for 4 to 5 hours;

[0071] Raise the temperature to 70-85°C and keep warm for 3-5 hours;

[0072] The filtrate is collected and concentrated into a paste under a pressure of 0.1 to 0.7 MPa and a temperature of 70 to 78°C;

[0073] Add perilla leaf oil, turpentine oil and eucalyptus oil dropwise in sequence and stir for 20 to 30 minutes to obtain a Chinese medicine extract paste.

[0074] The preparation of Chinese herbal medicine includes the following steps:

[0075] Firstly, Gleditsia sinensis, Sanguisorba officinalis, Herba Lycopodii and Soapberry bark are mixed to obtain a mixture a;

[0076] Add 5 to 6 times the weight of the Chinese medicine raw material water to the mixture a and boil for 2 to 4 times, each time for 1 to 1.5 hours, and control the temperature at 90 to 100°C;

[0077] After filtering, the filtrate is concentrated under reduced pressure and spray-dried to obtain a mixture b;

[0078] Add 70% to 80% ethanol, which is 7 to 8 times the weight of the Chinese medicine raw material, to the residue after water extraction, and heat and reflux and extract at 50 to 60°C for 2 to 4 times, each time for 2 to 3 hours;

[0079] The filtrate was concentrated under reduced pressure and spray-dried to obtain a mixture c;

[0080] The raw tourmaline stone is crushed, ball-milled, and sieved to obtain tourmaline fine powder;

[0081] The prepared mixture b and mixture c are mixed, ball-milled, sieved, and then mixed with tourmaline fine powder to obtain the original Chinese medicine.

[0082] Please refer to the attached Figure 2 , a method for preparing a composition for preventing and controlling rice sheath blight, the method comprising the following steps:

[0083] S1, putting Jinggangmycin, white carbon black, copper sulfate, chitosan, gibberellin, tebuconazole, sodium nitrophenolate, emulsifier and synergist into a stirring device for preliminary mixing to obtain a mixture F, and then adding the prepared Chinese medicine extract paste and Chinese medicine original medicine into the stirring device;

[0084] S2, then, stirring the mixture F with the Chinese medicine extract paste and the Chinese medicine original medicine at a speed of 300 to 500 revolutions per minute for 20 to 30 minutes;

[0085] S3, slowly add the solvent while stirring to gradually dissolve the mixture;

[0086] S4, continue stirring at the same stirring speed for 10 to 15 minutes to mix the solution evenly, and finally obtain a composition solution for preventing and controlling rice sheath blight

[0087] The stirring device maintains the internal temperature at 20-30°C during the stirring process.

[0088] In S3, the solvent is deionized water.

[0089] In S4, the mixture agglomerates during the stirring process, and the stirring speed is increased to 550-600 rpm.

[0090] The following is an introduction in conjunction with specific embodiments:

[0091] Embodiment 1:

[0092] A composition for preventing and treating rice sheath blight, comprising the following raw materials in parts by weight:

[0093] 80 parts of Jinggangmycin, 30 parts of Chinese medicine extract paste, 10 parts of Chinese medicine original medicine, 15 parts of white carbon black, 10 parts of copper sulfate, 12 parts of chitosan, 9 parts of gibberellins, 5 parts of tebuconazole, 1 part of sodium nitrophenolate, 2 parts of emulsifier and 1 part of synergist.

[0094] Among them, the Chinese medicine extract paste includes 8 parts of honeysuckle, 12 parts of dandelion, 7 parts of croton, 7 parts of artemisia annua, 8 parts of pokeweed, 6 parts of perilla leaf oil, 10 parts of turpentine oil and 5 parts of eucalyptus oil.

[0095] The original Chinese medicine includes 24 parts of Gleditsia sinensis, 24 parts of Sanguisorba officinalis, 15 parts of Wolfberry Herb, 15 parts of Sapindus mukorossi, and 5 parts of Tourmaline original stone.

[0096] Preparation method:

[0097] S1, putting Jinggangmycin, white carbon black, copper sulfate, chitosan, gibberellin, tebuconazole, sodium nitrophenolate, emulsifier and synergist into a stirring device for preliminary mixing to obtain a mixture F, and then adding the prepared Chinese medicine extract paste and Chinese medicine original medicine into the stirring device;

[0098] S2, then, stirring the mixture F with the Chinese medicine extract paste and the Chinese medicine original medicine at a speed of 300 revolutions per minute for 20 minutes, and maintaining the internal temperature at 20° C. during the stirring process;

[0099] S3, slowly add deionized water while stirring to gradually dissolve the mixture;

[0100] S4. Continue stirring at a stirring speed of 300 rpm for 10 minutes to mix the solution evenly, and finally obtain a composition solution for preventing and controlling rice sheath blight. No agglomeration occurs during the stirring process.

[0101] Embodiment 2:

[0102] A composition for preventing and treating rice sheath blight, comprising the following raw materials in parts by weight:

[0103] 85 parts of Jinggangmycin, 38 parts of Chinese medicine extract paste, 15 parts of Chinese medicine original medicine, 17 parts of white carbon black, 14 parts of copper sulfate, 14 parts of chitosan, 12 parts of gibberellins, 7 parts of tebuconazole, 3 parts of sodium nitrophenolate, 3 parts of emulsifier, and 2 parts of synergist.

[0104] Among them, the Chinese medicine extract paste includes 25 parts of honeysuckle, 16 parts of dandelion, 10 parts of croton, 10 parts of artemisia annua, 11 parts of pokeweed, 8 parts of perilla leaf oil, 13 parts of turpentine oil, and 7 parts of eucalyptus oil.

[0105] The original Chinese medicine includes 28 parts of Gleditsia sinensis, 28 parts of Sanguisorba officinalis, 18 parts of Wolfberry Herb, 18 parts of Sapindus mukorossi, and 8 parts of Tourmaline original stone.

[0106] Preparation method:

[0107] S1, putting Jinggangmycin, white carbon black, copper sulfate, chitosan, gibberellin, tebuconazole, sodium nitrophenolate, emulsifier and synergist into a stirring device for preliminary mixing to obtain a mixture F, and then adding the prepared Chinese medicine extract paste and Chinese medicine original medicine into the stirring device;

[0108] S2, then, stirring the mixture F with the Chinese medicine extract paste and the Chinese medicine original medicine at a speed of 400 revolutions per minute for 25 minutes, and maintaining the internal temperature at 25° C. during the stirring process;

[0109] S3, slowly add deionized water while stirring to gradually dissolve the mixture;

[0110] S4. Continue stirring at a stirring speed of 400 rpm for 13 minutes to mix the solution evenly, and finally obtain a composition solution for preventing and controlling rice sheath blight. No agglomeration occurs during the stirring process.

[0111] Embodiment three:

[0112] A composition for preventing and treating rice sheath blight, comprising the following raw materials in parts by weight:

[0113] 90 parts of Jinggangmycin, 45 parts of Chinese medicine extract paste, 20 parts of Chinese medicine original medicine, 19 parts of white carbon black, 17 parts of copper sulfate, 16 parts of chitosan, 15 parts of gibberellins, 9 parts of tebuconazole, 5 parts of sodium nitrophenolate, 4 parts of emulsifier and 3 parts of synergist.

[0114] Among them, the Chinese medicine extract paste includes 45 parts of honeysuckle, 19 parts of dandelion, 13 parts of croton, 12 parts of artemisia annua, 14 parts of pokeweed, 10 parts of perilla leaf oil, 15 parts of turpentine oil, and 9 parts of eucalyptus oil.

[0115] The original Chinese medicine includes 32 parts of Gleditsia sinensis, 32 parts of Sanguisorba officinalis, 22 parts of Wolfberry, 22 parts of Sapindus mukorossi, and 12 parts of Tourmaline raw stone.

[0116] Preparation method:

[0117] S1, putting Jinggangmycin, white carbon black, copper sulfate, chitosan, gibberellin, tebuconazole, sodium nitrophenolate, emulsifier and synergist into a stirring device for preliminary mixing to obtain a mixture F, and then adding the prepared Chinese medicine extract paste and Chinese medicine original medicine into the stirring device;

[0118] S2, then, stirring the mixture F with the Chinese medicine extract paste and the Chinese medicine original medicine at a speed of 500 revolutions per minute for 30 minutes, and maintaining the internal temperature at 30° C. during the stirring process;

[0119] S3, slowly add deionized water while stirring to gradually dissolve the mixture;

[0120] S4. Continue stirring at a stirring speed of 500 rpm for 15 minutes to mix the solution evenly, and finally obtain a composition solution for preventing and controlling rice sheath blight. Agglomeration occurs during the stirring process, and the stirring speed is increased to 600 rpm until the agglomeration disappears.

[0121] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composition for preventing and treating rice sheath blight and a preparation method thereof, characterized in that: The invention comprises the following raw materials in parts by weight: 80-90 parts of Jinggangmycin, 30-45 parts of Chinese medicine extract paste, 10-20 parts of Chinese medicine original medicine, 15-19 parts of white carbon black, 10-17 parts of copper sulfate, 12-16 parts of chitosan, 9-15 parts of gibberellins, 5-9 parts of tebuconazole, 1-5 parts of sodium nitrophenolate, 2-4 parts of emulsifier and 1-3 parts of synergist.

2. The composition for preventing and controlling rice sheath blight and its preparation method according to claim 1, characterized in that: The traditional Chinese medicine extract paste comprises 8-45 parts of honeysuckle, 12-19 parts of dandelions, 7-13 parts of croton seeds, 7-12 parts of artemisia annua, 8-14 parts of pokeweed, 6-10 parts of perilla leaf oil, 10-15 parts of turpentine oil and 5-9 parts of eucalyptus oil.

3. The composition for preventing and controlling rice sheath blight and its preparation method according to claim 1, characterized in that: The Chinese herbal medicine raw materials include 24-32 parts of Gleditsia sinensis, 24-32 parts of Sanguisorba officinalis, 15-22 parts of Rhizoma Schisandrae Chinensis, 15-22 parts of Soapberry bark and 5-12 parts of Tourmaline raw materials.

4. The composition for preventing and controlling rice sheath blight and its preparation method according to claim 2, characterized in that: The Chinese medicine extract paste comprises the following preparation steps: Mix honeysuckle, dandelion, croton, artemisia annua, and pokeweed; Add 25-35wt% ethanol aqueous solution in an amount of 5-6 times the weight of honeysuckle to the above mixture; Soak at room temperature for 4 to 5 hours; Raise the temperature to 70-85°C and keep warm for 3-5 hours; The filtrate is collected and concentrated into a paste under a pressure of 0.1 to 0.7 MPa and a temperature of 70 to 78°C; Add perilla leaf oil, turpentine oil and eucalyptus oil dropwise in sequence and stir for 20 to 30 minutes to obtain a Chinese medicine extract paste.

5. The composition for preventing and controlling rice sheath blight and its preparation method according to claim 3, characterized in that: The preparation of the Chinese medicine raw material comprises the following steps: Firstly, Gleditsia sinensis, Sanguisorba officinalis, Herba Lycopodii and Soapberry bark are mixed to obtain a mixture a; Add 5 to 6 times the weight of the Chinese medicine raw material water to the mixture a and boil for 2 to 4 times, each time for 1 to 1.5 hours, and control the temperature at 90 to 100°C; After filtering, the filtrate is concentrated under reduced pressure and spray-dried to obtain a mixture b; Add 70% to 80% ethanol, which is 7 to 8 times the weight of the Chinese medicine raw material, to the residue after water extraction, and heat and reflux and extract at 50 to 60°C for 2 to 4 times, each time for 2 to 3 hours; The filtrate was concentrated under reduced pressure and spray-dried to obtain a mixture c; The raw tourmaline stone is crushed, ball-milled, and sieved to obtain tourmaline fine powder; The prepared mixture b and mixture c are mixed, ball-milled, sieved, and then mixed with tourmaline fine powder to obtain the original Chinese medicine.

6. A method for preparing a composition for preventing and controlling rice sheath blight, characterized in that: A composition for controlling rice sheath blight according to any one of claims 1 to 5, the method comprising the following steps: S1, putting Jinggangmycin, white carbon black, copper sulfate, chitosan, gibberellin, tebuconazole, sodium nitrophenolate, emulsifier and synergist into a stirring device for preliminary mixing to obtain a mixture F, and then adding the prepared Chinese medicine extract paste and Chinese medicine original medicine into the stirring device; S2, then, stirring the mixture F with the Chinese medicine extract paste and the Chinese medicine original medicine at a speed of 300 to 500 revolutions per minute for 20 to 30 minutes; S3, slowly add the solvent while stirring to gradually dissolve the mixture; S4. Continue stirring at the same stirring speed for 10 to 15 minutes to mix the solution evenly, and finally obtain a composition solution for preventing and controlling rice sheath blight.

7. A composition for preventing and controlling rice sheath blight and a preparation method thereof according to claim 6, characterized in that: The stirring device maintains an internal temperature of 20-30°C during the stirring process.

8. The composition for preventing and controlling rice sheath blight and its preparation method according to claim 1, characterized in that: In S3, the solvent is deionized water.

9. The composition for preventing and controlling rice sheath blight and its preparation method according to claim 6, characterized in that: In S4, the mixture agglomerates during the stirring process, and the stirring speed is increased to 550-600 rpm.

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