Ipconazole, fludioxonil and clothianidin seed treatment suspending agent and preparation method thereof

Abstract

The invention provides an ipconazole, fludioxonil and clothianidin seed treatment suspending agent and a preparation method thereof, relates to the field of agricultural production, and aims at preventing and treating soil-borne diseases and underground pests of crops such as peanuts. The suspending agent consists of ipconazole, fludioxonil, clothianidin, a wetting dispersant, a film-forming agent, a thickening agent, a stabilizing agent and the balance of deionized water. The preparation method comprises the following steps: dissolving ipconazole, fludioxonil and clothianidin in ethyl acetate to form an oil phase, forming a water phase by plant ash and other components, and mixing the two phases to obtain the uniform suspending agent. The suspending agent can effectively prevent and treat wheat stem rot and peanut root rot, improves the emergence rate and yield of crops, has broad-spectrum bactericidal and insecticidal effects, and is environment-friendly. The embodiment shows the preparation and field efficacy of different formulas, and verifies the high efficiency and stability of the suspending agent.

Description

Technical Field

[0001] The invention relates to the field of agricultural production, in particular to a cypermethrin·fludioxonil·clothianidin seed treatment suspension and a preparation method thereof. Background Art

[0002] In modern agricultural production, due to the monotony of planting structure and the common phenomenon of planting the same crop (such as wheat, peanuts, etc.) for many consecutive years, the number of pathogens and overwintering insect eggs of common diseases of single crops in the soil accumulates year by year. This situation makes the incidence of soil-borne diseases of wheat such as root rot, stem base rot, and total rot, and peanut root rot, stem base rot, and white rot worsen year by year. At the same time, the damage caused by underground pests such as white grubs, mole crickets, wireworms, and cutworms also shows a trend of worsening year by year.

[0003] In actual drug management, seed coating has become the most convenient and economical means of planting management, and has been recognized and accepted by the market and more and more farmers. However, among the compound seed treatment products currently on the market, the fungicidal ingredients are mainly difenoconazole, fludioxonil, carbendazim, thiram, azoxystrobin, and metalaxyl-M, and the insecticide ingredients are mainly imidacloprid, thiamethoxam, and dimethomorph. There is little comprehensive application of oxadiazine, fludioxonil, and clothianidin. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented by the following technical scheme: a cypermethrin·fludioxonil·clothianidin seed treatment suspension and a preparation method thereof, comprising the following steps:

[0005] S1: After weighing ipconazole, fludioxonil and clothianidin according to the proportion, add them into ethyl acetate and start stirring, set the heating temperature to 40°C to 50°C, stir at a speed of 300 to 500 rpm for 10 to 15 minutes at a temperature of 40°C to 50°C to ensure that the raw materials and the solvent are initially mixed, then increase the temperature to 60 to 70°C, reduce the stirring speed to 100 to 200 rpm, and continue stirring for 20 to 30 minutes to ensure that each component is fully dissolved and form a uniform oil phase;

[0006] S2: First, the dried plant ash is crushed, the crushed plant ash is passed through a 200-mesh sieve, the sieved plant ash is added to deionized water to form a suspension, and then heated to 50°C to 60°C, stirred at a speed of 200 to 400 rpm for 30 to 60 min, and after adding a wetting dispersant, the mixture is stirred at a temperature of 50 to 60°C for 15 to 60 min, and the stirring speed is reduced to 100 to 200 rpm. Next, a film-forming agent, a thickener and a stabilizer are added to the mixture. In this step, the temperature is controlled at 40 to 60°C, the stirring speed is maintained at 100 to 200 rpm, and the stirring time is 10 to 20 min to form a stable aqueous phase;

[0007] S3: Under high-speed stirring, slowly add the oil phase into the water phase, stir at room temperature, set the stirring speed at 5000-7000 rpm, stir for 30-60 minutes, and obtain the cypermethrin·fluthionil·clothianidin seed treatment suspension.

[0008] A cypermethrin·fludioxonil·clothianidin seed treatment suspension comprises the following components in parts by weight: cypermethrin: 0.5-2 parts, fludioxonil: 1-3 parts, clothianidin: 1-3 parts, a wetting and dispersing agent: 5-15 parts, 3-7 parts of plant ash, 2-12 parts of a film-forming agent, 3-10 parts of a thickener, 0.5-1 part of a stabilizer, and 47-84 parts of deionized water.

[0009] As a broad-spectrum systemic fungicide, the described ioconazole has the effects of systemic conduction and contact protection activity. It has a low dosage, high activity, is safe for both monocotyledonous and dicotyledonous crops, and has seed disinfection, protection and therapeutic effects. The ioconazole original drug has high accuracy and precision, good linear relationship, and has the advantages of simplicity, rapidity, accuracy and good separation effect. It performs well in controlling seed diseases of rice and other crops, and has good prevention and control effects on rice seedling disease, sesame spot disease and rice blast. As a seed coating agent, ioconazole is extremely safe and suitable for a variety of crops, including corn, wheat, rice, peanuts, cotton, etc., and has a wider fungicide spectrum and a longer lasting effect than similar fungicides such as tebuconazole and difenoconazole.

[0010] The fludioxonil is an efficient seed treatment fungicide that can prevent and treat a variety of crop diseases, particularly root diseases such as damping-off, root rot, wilt and vine blight. Its active ingredients have significant preventive effects on a variety of pathogens such as ascomycetes, basidiomycetes and imperfect fungi. When treating seeds, fludioxonil has only a small amount of active ingredients that are absorbed, but are sufficient to kill the pathogens on the surface of the seeds and in the seed coat, and have no cross-resistance with all current fungicides. In addition, fludioxonil forms a film quickly and does not fall off after being used for seed treatment, and the active ingredients are stable and lasting in the soil, forming a protective circle of more than 4 months. Fludioxonil is extremely safe for crop seeds, does not affect germination, and can promote the germination of seeds in advance, with neat germination and strong growth. Due to its extremely low toxicity, it is very safe for humans and animals, is a chemically synthesized bionic preparation, and is very suitable for the production of pollution-free vegetables.

[0011] The clothianidin is a second-generation nicotinoid insecticide, which has higher activity and a wider spectrum of insecticidal effects compared to the first-generation thiamethoxam and imidacloprid. The chlorothiazole group in its molecular structure replaces the pyridine group, and the nitromethylene part is replaced by the nitromethylene group. These changes increase the activity against piercing-sucking mouthparts pests, and also have a stronger effect on chewing mouthparts pests. Clothianidin is not easily leached in the soil, has a long lasting effect, and can be up to 30 days for foliar spraying, and up to 6 months for soil treatment. Its strong systemic conductivity enables it to kill both above-ground and underground pests, and is particularly suitable for seed dressing, which can achieve twice the result with half the effort. Clothianidin is extremely safe, has little effect on non-target organisms, is suitable for application in various crops such as peanuts, wheat, and rice, and has broad market application prospects.

[0012] The wetting and dispersing agent consists of 2 to 6 parts of sodium lignin sulfonate, 1 to 4 parts of tristyrylphenol polyoxyethylene ether and 2 to 5 parts of fatty alcohol sulfate by weight.

[0013] The sodium lignin sulfonate is a natural polymer compound with good wetting properties, which can significantly reduce the surface tension of water, making the solid particles in the suspension more easily wetted by water. As an anionic surfactant, the sodium lignin sulfonate can form a negative charge layer on the surface of the solid particles, prevent aggregation between particles through electrostatic repulsion, and improve the dispersion stability of the suspension. The sodium lignin sulfonate is derived from renewable resources, is environmentally friendly, and has good compatibility with other pesticide ingredients, and will not have adverse effects on seeds or crops.

[0014] The tristyrylphenol polyoxyethylene ether is a nonionic surfactant with excellent emulsifying and wetting abilities, and can promote the dispersion of oil-soluble components in water to form a stable emulsion. During the preparation and use process, adding a proper amount can reduce the foam generated by stirring or spraying, making it easier to operate and use.

[0015] The fatty alcohol sulfate is a type of highly efficient anionic surfactant with strong wetting and penetration capabilities. It can quickly reduce the surface tension of water and promote the wetting of solid particles in the suspension. By synergizing with other surfactants, the fatty alcohol sulfate can further enhance the dispersibility and stability of the suspension, ensuring that there is no stratification or precipitation during long-term storage and use. The fatty alcohol sulfate is easily biodegradable and has little impact on the environment, meeting the requirements of green agriculture.

[0016] The film-forming agent consists of 0.5 to 3 parts of polyacrylate, 0.5 to 3 parts of polylactic acid, 0.5 to 3 parts of sodium alginate and 0.5 to 3 parts of chitosan in parts by weight.

[0017] The polyacrylate has good film-forming properties and can form a uniform and breathable film on the surface of seeds, effectively locking in moisture and nutrients, while slowly releasing active ingredients and prolonging the efficacy. Polylactic acid is a biodegradable material with good biocompatibility and complete degradability, and will not cause long-term pollution to the soil and the environment. Polylactic acid can form a thin film on the surface of seeds, and by controlling its molecular weight and crystallinity, it can achieve sustained release of drugs and improve the durability of drug efficacy. Sodium alginate is derived from marine algae and is a natural high-molecular polysaccharide that is safe and harmless to the environment. It can form a moisturizing film on the surface of seeds, reduce water evaporation, and provide a microenvironment for seeds, which is conducive to seed germination. Chitosan has natural antibacterial properties and can effectively inhibit harmful microorganisms in the soil and protect seeds from pathogens. Chitosan can form a protective film on the surface of seeds, slow down the release rate of active ingredients, and prolong the efficacy period.

[0018] The thickener is composed of 1 to 3 parts of xanthan gum, 1 to 3 parts of gelatin and 1 to 4 parts of magnesium aluminum silicate by weight.

[0019] The xanthan gum is a highly efficient natural thickener that can significantly increase the viscosity of the suspension, enhance the stability of the system, and prevent the effective ingredients from settling or stratifying. The xanthan gum gives the suspension good rheological properties, so that it can evenly cover the seed surface when sprayed, thereby improving the utilization rate of the drug efficacy. Gelatin is also a commonly used thickener that can increase the viscosity of the suspension and improve its physical stability. Gelatin has a certain film-forming property and can form a thin film on the surface of the seed, which is helpful for the sustained release of the effective ingredients and the protection of the seeds. Magnesium aluminum silicate is an inorganic thickener with extremely high thickening efficiency, which can significantly increase the viscosity of the suspension. Magnesium aluminum silicate gives the suspension good thixotropic properties, that is, it maintains high viscosity when stationary, and the viscosity decreases when subjected to shear force, which is convenient for use.

[0020] The stabilizer is sodium dodecylbenzene sulfonate.

[0021] The present invention provides a seed treatment suspension of cypermethrin, fludioxonil and clothianidin.

[0022] Beneficial effects:

[0023] 1. The present invention forms a protective film on the surface of seeds by introducing film-forming agents such as polyacrylate, polylactic acid and chitosan. This film can effectively lock in moisture and nutrients, while slowly releasing active ingredients to prolong the duration of drug efficacy. This not only improves the utilization rate of the drug, but also ensures that crops can obtain continuous protection throughout the growth cycle, thereby improving the overall yield and quality of crops.

[0024] 2. The present invention provides a broad-spectrum bactericidal and insecticidal effect through the combination of cyproconazole, fludioxonil and clothianidin, which can effectively prevent and control a variety of crop diseases and pests. The use of a wetting dispersant ensures the uniform dispersion of the active ingredients in the aqueous phase and improves the stability of the suspension. The film-forming agent forms a protective layer on the surface of the seeds, prolongs the efficacy period and reduces the loss of the active ingredients. The thickener increases the viscosity of the suspension, improves the physical stability, and is easy to use. The addition of the stabilizer sodium dodecylbenzene sulfonate further improves the stability of the product, ensuring that there is no stratification or precipitation during long-term storage and use.

[0025] 3. The sodium lignin sulfonate and other natural polymer compounds used in the present invention have good wetting properties and biocompatibility, and will not have adverse effects on the environment and non-target organisms. Fatty alcohol sulfate, as a highly efficient anionic surfactant, has strong wetting and penetration capabilities, and is easily biodegradable, meeting the requirements of green agriculture. These characteristics not only improve the efficiency of pesticide use, but also reduce the negative impact on the environment, and help achieve sustainable agricultural production. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0027] Embodiment 1:

[0028] Formula: 1 part of iodide, 2.5 parts of fludioxonil, 2 parts of clothianidin, 5 parts of wood ash, 4 parts of sodium lignin sulfonate, 5 parts of wood ash, 2 parts of tristyrylphenol polyoxyethylene ether, 3 parts of fatty alcohol sulfate, 1 part of acrylate, 1 part of polylactic acid, 1 part of sodium alginate, 1 part of chitosan, 2 parts of xanthan gum, 1 part of gelatin, 2 parts of magnesium aluminum silicate, 0.5 parts of sodium dodecylbenzene sulfonate and 64 parts of water.

[0029] Preparation steps:

[0030] S1: After weighing ioconazole, fludioxonil and clothianidin according to the proportion, add them into ethyl acetate and start stirring, set the heating temperature to 40°C to 50°C, and stir at a speed of 300 to 500 rpm for 10 to 15 minutes at a temperature of 40°C to 50°C to ensure that the raw materials and the solvent are initially mixed. Then, increase the temperature to 60 to 70°C, reduce the stirring speed to 100 to 200 rpm, and continue stirring for 20 to 30 minutes to ensure that each component is fully dissolved and form a uniform oil phase.

[0031] S2: First, the dried wood ash is crushed, the crushed wood ash is passed through a 200-mesh sieve, and the sieved wood ash is added to deionized water to form a suspension. Then it is heated to 50°C to 60°C and stirred at a speed of 200 to 400rpm for 30 to 60min. After adding the wetting dispersant, continue stirring at a temperature of 50 to 60°C for 15min to 60min, and the stirring speed is reduced to 100 to 200rpm. Next, a film-forming agent, a thickener and a stabilizer are added to the mixture. In this step, the temperature is controlled at 40 to 60°C, the stirring speed is maintained at 100 to 200rpm, and the stirring time is 10min to 20min to form a stable aqueous phase.

[0032] S3: Under high-speed stirring, slowly add the oil phase into the water phase, stir at room temperature, set the stirring speed at 5000-7000 rpm, stir for 30-60 min, and obtain the cypermethrin·fluthionil·clothianidin seed treatment suspension.

[0033] In this embodiment, the combination of oxadiazole, fludioxonil and clothianidin provides a broad-spectrum bactericidal and insecticidal effect, which can effectively prevent and treat a variety of crop diseases and pests. The use of a wetting dispersant ensures the uniform dispersion of the active ingredients in the aqueous phase and improves the stability of the suspension. The film-forming agent forms a protective layer on the surface of the seeds, prolongs the efficacy period and reduces the loss of the active ingredients. The thickener increases the viscosity of the suspension, improves the physical stability, and is easy to use. The addition of the stabilizer sodium dodecylbenzene sulfonate further improves the stability of the product, ensuring that there is no stratification or precipitation during long-term storage and use.

[0034] Embodiment 2:

[0035] Formula: 2 parts of iodide, 3 parts of fludioxonil, 3 parts of clothianidin, 5 parts of wood ash, 5 parts of sodium lignin sulfonate, 3 parts of tristyrylphenol polyoxyethylene ether, 4 parts of fatty alcohol sulfate, 1 part of polyacrylate, 1 part of polylactic acid, 1 part of sodium alginate, 1 part of chitosan, 2 parts of xanthan gum, 2 parts of gelatin, 2 parts of magnesium aluminum silicate, 0.75 parts of sodium dodecylbenzene sulfonate and 64.25 parts of water.

[0036] Preparation steps: same as Example 1.

[0037] In this embodiment, increasing the proportion of ipconazole, fludioxonil and clothianidin can enhance the control effect on diseases and pests, while increasing the proportion of the wetting and dispersing agent and the film-forming agent helps to improve the stability and adhesion of the suspension.

[0038] Embodiment 3:

[0039] Formula: 1 part of iodide, 2 parts of fludioxonil, 1 part of clothianidin, 3 parts of wood ash, 3 parts of sodium lignin sulfonate, 1 part of tristyrylphenol polyoxyethylene ether, 2 parts of fatty alcohol sulfate, 0.75 parts of polyacrylate, 0.75 parts of polylactic acid, 1.5 parts of sodium alginate, 1.5 parts of chitosan, 1.5 parts of xanthan gum, 1.5 parts of gelatin, 3 parts of magnesium aluminum silicate, 0.5 parts of sodium dodecylbenzene sulfonate and 77.5 parts of water.

[0040] Preparation steps: same as Example 1.

[0041] In this embodiment, reducing the proportion of active ingredients can reduce costs while maintaining a certain control effect. Increasing the proportion of thickeners helps to increase the viscosity and stability of the suspension, which is suitable for occasions that are cost-sensitive and require a certain degree of stability.

[0042] Embodiment 4:

[0043] Formula: 2 parts of iodide, 3 parts of fludioxonil, 3 parts of clothianidin, 7 parts of wood ash, 6 parts of sodium lignin sulfonate, 4 parts of tristyrylphenol polyoxyethylene ether, 5 parts of fatty alcohol sulfate, 3 parts of polyacrylate, 3 parts of polylactic acid, 3 parts of sodium alginate, 3 parts of chitosan, 3 parts of xanthan gum, 3 parts of gelatin, 4 parts of magnesium aluminum silicate, 1 part of sodium dodecylbenzene sulfonate and 47 parts of water.

[0044] Preparation steps: same as Example 1.

[0045] In this embodiment, increasing the proportion of all components can significantly improve the control effect and stability of the suspension, but it will also increase the cost.

[0046] Embodiment 5:

[0047] Formula: 0.5 parts of ioconazole, 1 part of fludioxonil, 2 parts of clothianidin, 2 parts of sodium lignin sulfonate, 4 parts of wood ash, 2 parts of tristyrylphenol polyoxyethylene ether, 3 parts of fatty alcohol sulfate, 0.5 parts of polyacrylate, 0.5 parts of polylactic acid, 0.5 parts of sodium alginate, 1 part of chitosan, 2 parts of xanthan gum, 1 part of gelatin, 1 part of magnesium aluminum silicate, 1 part of sodium dodecylbenzene sulfonate and 79 parts of water.

[0048] Preparation steps: same as Example 1.

[0049] In this embodiment, reducing the ratio of active ingredients to auxiliary ingredients can significantly reduce costs, but may sacrifice certain control effects and stability.

[0050] Physical and chemical performance test:

[0051] According to the national standard requirements for pesticide suspensions, the performance of the ioconazole·fludioxonil·clothianidin seed treatment suspensions prepared in Examples 1 to 5 was tested, and the results are shown in Table 1:

[0052] Table 1

[0053]

[0054]

[0055] Field efficacy test 1: Efficacy test of seed treatment suspension concentrate of cypermethrin, fludioxonil and clothianidin against wheat stem rot.

[0056] Treatment method: Each treatment was repeated 4 times, and each treatment was completed on the same day. Before sowing, the seed treatment suspension of cypermethrin, fludioxonil and clothianidin was fully mixed with the seeds to make the liquid evenly distributed on the seeds. After spreading them out to dry, they were sown on the same day.

[0057] Soil type of the test site: loam, pH 6.9, organic matter content 2.3%.

[0058] Area of ​​the community: The area of ​​the community is 66m 2 , each cell is separated by 1m as a protection row.

[0059] Seedling rate survey: During the wheat seedling stage, observe the wheat seedling stage, emergence rate, crop growth, and whether there is pesticide damage in each treatment;

[0060]

[0061]

[0062] Investigation of wheat stem rot: In the late stage of wheat filling, samples were taken at 5 points in a Z shape in each plot, with 30 plants at each point, and the disease index was calculated. According to the development degree of wheat stem rot, it can be divided into the following four levels:

[0063] Level 0 - Healthy: The wheat plants show no disease symptoms, no discoloration at the base of the stem, and the plants are growing normally.

[0064] Level 1 - Mild: Slight brown or dark brown spots appear at the base of wheat stems, but do not affect the normal growth and development of the plants. The surface area of ​​the spots is less than 1 / 4 of the total surface area of ​​the stems and roots.

[0065] Level 2-moderate: There are many lesions at the base of the wheat stem, and the surface area of ​​the lesions accounts for 1 / 4-1 / 2 of the total surface area of ​​the stem and root;

[0066] Grade 3-Severe: Severe browning occurs at multiple nodes at the base of the wheat stem, the lesions extend to multiple internodes, the stem is easily broken, the lesions are numerous and large, and the surface area of ​​the lesions accounts for 1 / 2-3 / 4 of the total surface area of ​​the stem and root;

[0067] 4 doses - extremely severe: the surface area of ​​the lesions is larger than 3 / 4 of the total surface area of ​​the stem and roots, the main root is not completely necrotic, and the aboveground parts wilt;

[0068] Level 5 - Death: The plant dies.

[0069]

[0070]

[0071] The experimental treatment design, formula 1 to 5 is the seed treatment suspension of iodide·fludioxonil·clothianidin prepared in Examples 1 to 5, and formula 6 is water as a blank control, see Table 2 for details:

[0072] Table 2

[0073]

[0074] Field efficacy test 2: Efficacy test of seed treatment suspension concentrate of cypermethrin, fludioxonil and clothianidin against peanut root rot.

[0075] Treatment method: Each treatment was repeated 4 times, and each treatment was completed on the same day. Before sowing, the seed treatment suspension of cypermethrin, fludioxonil and clothianidin was fully mixed with the seeds to make the liquid evenly distributed on the seeds. After spreading them out to dry, they were sown on the same day.

[0076] Soil type of the test site: loam, pH 7.1, organic matter content 2.0%.

[0077] Area of ​​the community: The area of ​​the community is 66m 2 , each cell is separated by 1m as a protection row.

[0078] Seedling rate survey: During the peanut seedling stage, observe the peanut seedling stage, emergence rate, crop growth, and whether there is pesticide damage in each treatment;

[0079]

[0080]

[0081] Survey of peanut root rot: During the maturity period of peanuts, samples were taken at 5 points in a Z-shape in each plot, with 30 plants at each point. The disease index was calculated and divided into the following four levels according to the development degree of wheat stem base rot:

[0082] Level 0 - Healthy: The root system is completely healthy, with no visible disease spots, the root bark has normal color, and there is no sign of rot. The plant grows normally, without symptoms such as wilting or yellowing.

[0083] Level 1 - Mild: A small amount of brown spots appear on the root bark, and the area of ​​the spots does not exceed 25% of the root surface area. Plant growth is slightly inhibited, but there is no obvious wilting or yellowing.

[0084] Level 2-moderate: There are many root bark lesions, and the lesion area accounts for 26% to 50% of the root surface area. The plant growth is stunted and may partially turn yellow, but the overall growth is still relatively normal.

[0085] Grade 3-Severe: The root bark lesions are severe, with the lesion area accounting for 51% to 75% of the root surface area. The plant growth is significantly hindered, with obvious yellowing and partial wilting, which may affect the yield.

[0086] Level 4 - Extremely severe: The root bark lesions are very severe, with the lesion area exceeding 75% of the root surface area, and the rhizome may be completely rotten. The plant is severely wilted and yellowed, and growth is almost stagnant, seriously affecting yield.

[0087] Level 5 - Death: The plant dies.

[0088]

[0089]

[0090] 30 days after sowing, investigate the occurrence of underground pests in each treatment. All peanut seedlings bitten or killed by underground pests such as white grubs, mole crickets, cutworms or wireworms are insect-injured seedlings. Record the number of insect-injured seedlings, calculate the insect-injured seedling rate and control effect:

[0091]

[0092] The experimental treatment design, formula 1 to 5 is the seed treatment suspension of iodide·fludioxonil·clothianidin prepared in Examples 1 to 5, and formula 6 is water as a blank control, see Table 3 for details:

[0093] Table 2

[0094]

[0095] 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 suspension concentrate of chlorpyrifos·fludioxonil·clothianidin for seed treatment, characterized in that: The composition includes the following components by weight: 0.5-2 parts of ipconazole, 1-3 parts of fludioxonil, 1-3 parts of clothianidin, 5-15 parts of wetting and dispersing agent, 3-7 parts of plant ash, 2-12 parts of film-forming agent, 3-10 parts of thickener, 0.5-1 part of stabilizer and 47-84 parts of deionized water.

2. The ioconazole-fludioxonil-clothianidin seed treatment suspension concentrate and its preparation method according to claim 1, characterized in that: The wetting and dispersing agent consists of 2 to 6 parts of sodium lignin sulfonate, 1 to 4 parts of tristyrylphenol polyoxyethylene ether and 2 to 5 parts of fatty alcohol sulfate by weight.

3. The ioconazole-fludioxonil-clothianidin seed treatment suspension concentrate and its preparation method according to claim 1, characterized in that: The film-forming agent consists of 0.5 to 3 parts of polyacrylate, 0.5 to 3 parts of polylactic acid, 0.5 to 3 parts of sodium alginate and 0.5 to 3 parts of chitosan in parts by weight.

4. The ioconazole-fludioxonil-clothianidin seed treatment suspension concentrate and its preparation method according to claim 1, characterized in that: The thickener is composed of 1 to 3 parts of xanthan gum, 1 to 3 parts of gelatin and 1 to 4 parts of magnesium aluminum silicate by weight.

5. The ioconazole-fludioxonil-clothianidin seed treatment suspension concentrate and its preparation method according to claim 1, characterized in that: The stabilizer is sodium dodecylbenzene sulfonate.

6. The seed treatment suspension concentrate of iodide-1, fludioxonil and clothianidin according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: S1: After weighing ipconazole, fludioxonil and clothianidin according to the proportion, add them into ethyl acetate and start stirring, set the heating temperature to 40°C to 50°C, the initial stirring speed can be set to 300-500rpm, and continue stirring for 10-15 minutes to ensure that the components are initially mixed, then gradually increase the heating temperature to 60-70°C, gradually reduce the stirring speed to 100-200rpm, and continue stirring for 20-30 minutes to ensure that the components are fully dissolved and form a uniform oil phase; S2: Crushing and screening: First, the dried wood ash is crushed, the crushed wood ash is passed through a 200-mesh sieve, and the sieved wood ash is added to deionized water to form a suspension. Then, the suspension is heated to 50°C to 60°C, and the suspension is stirred while maintaining the temperature at 50°C to 60°C. The stirring speed is set to 200 to 400 rpm, and the stirring is performed for 30 min to 60 min. After adding the wetting dispersant, the stirring is continued at 50 to 60°C for 15 min to 60 min, and the stirring speed is reduced to 100 to 200 rpm. Next, a film-forming agent, a thickener and a stabilizer are added to the mixture. In this step, the temperature is controlled at 40 to 60°C, the stirring speed is maintained at 100 to 200 rpm, and the stirring time is 10 min to 20 min to form a stable aqueous phase. S3: Under high-speed stirring, slowly add the oil phase into the water phase, stir at room temperature, set the stirring speed at 5000-7000 rpm, stir for 30-60 minutes, and obtain the cypermethrin·fluthionil·clothianidin seed treatment suspension.

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