A seed treatment suspension of cyprodinil + fludioxonil + thiamethoxam and its preparation method

Abstract

This invention provides a seed treatment suspension of tebuconazole, fludioxonil, and thiamethoxam and its preparation method, relating to the field of agricultural production, and aiming to control soil-borne diseases and underground pests in crops such as peanuts. The suspension consists of tebuconazole, fludioxonil, thiamethoxam, as well as wetting and dispersing agents, film-forming agents, thickeners, and stabilizers, with deionized water as the balance. The preparation method includes dissolving tebuconazole, fludioxonil, and thiamethoxam in ethyl acetate to form an oil phase, and wood ash and other components to form an aqueous phase, then mixing the two phases to obtain a homogeneous suspension. This suspension can effectively control wheat stem rot and peanut root rot, improve crop emergence rate and yield, has broad-spectrum fungicidal and insecticidal effects, and is environmentally friendly. Examples demonstrate the preparation of different formulations and their field efficacy, verifying the high efficiency and stability of the suspension.

Description

Technical Field

[0001] This invention relates to the field of agricultural production, specifically to a seed treatment suspension of tebuconazole, fludioxonil, and thiamethoxam and its preparation method. Background Technology

[0002] In modern agricultural production, the monoculture of planting structures and the widespread practice of planting the same crop (such as wheat and peanuts) for many consecutive years have led to a year-on-year accumulation of pathogens and overwintering insect eggs in the soil that commonly cause diseases affecting this single crop. This situation has resulted in a year-on-year increase in the incidence of soil-borne diseases in wheat, such as root rot, stem base rot, and take-all, as well as root rot, stem base rot, and white mold in peanuts. Simultaneously, the damage caused by underground pests such as grubs, mole crickets, wireworms, and cutworms has also shown a trend of increasing severity.

[0003] In practical pesticide management, seed coating has become a convenient and economical planting management method, recognized and accepted by the market and an increasing number of farmers. However, currently available compound seed treatment products mainly contain fungicides such as difenoconazole, fludioxonil, carbendazim, thiram, azoxystrobin, and metalaxyl, and insecticidal ingredients such as imidacloprid, thiamethoxam, and dinotefuran. There is a lack of comprehensive application of thiamethoxam, fludioxonil, and thiamethoxam. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a seed treatment suspension of cyprodinil + fludioxonil + thiamethoxam and its preparation method, comprising the following steps:

[0005] S1: Weigh the cyprodinil, fludioxonil, and thiamethoxam according to the specified ratio, add them to ethyl acetate, and start stirring. Set the heating temperature to 40℃~50℃ and stir at 300~500rpm for 10~15 minutes at 40℃~50℃ to ensure that the raw materials and solvents are initially mixed. Then, raise the temperature to 60~70℃ and reduce the stirring speed to 100~200rpm, and continue stirring for 20~30 minutes to ensure that all components are fully dissolved and form a uniform oil phase.

[0006] S2: First, the dried wood ash is pulverized and passed through a 200-mesh sieve. The sieved wood ash is then added to deionized water to form a suspension. The suspension is then heated to 50℃~60℃ and stirred at 200~400rpm for 30~60min. After adding a wetting and dispersing agent, stirring continues at 50~60℃ for 15min~60min, with the stirring speed reduced to 100~200rpm. Next, a film-forming agent, thickener, and stabilizer are added to the mixture. In this step, the temperature is controlled at 40~60℃, the stirring speed is maintained at 100~200rpm, and the stirring time is 10min~20min to form a stable aqueous phase.

[0007] S3: Under high-speed stirring, the oil phase is slowly added to the aqueous phase, stirred at room temperature, with the stirring speed set at 5000-7000 rpm, and stirred for 30-60 minutes to obtain a seed treatment suspension of tebuconazole-fludioxonil-thiamethoxam.

[0008] A seed treatment suspension of tebuconazole, fludioxonil, and thiamethoxam, comprising the following components by weight: tebuconazole: 0.5-2 parts, fludioxonil: 1-3 parts, thiamethoxam: 1-3 parts, wetting and dispersing agent: 5-15 parts, wood ash: 3-7 parts, film-forming agent: 2-12 parts, thickener: 3-10 parts, stabilizer: 0.5-1 part, and deionized water: 47-84 parts.

[0009] The aforementioned tebuconazole, as a broad-spectrum systemic fungicide, exhibits systemic and contact protective activity. It requires low dosage, has high activity, and is safe for both monocot and dicot crops, providing seed disinfection, protection, and treatment. The tebuconazole technical grade demonstrates high accuracy and precision, good linearity, and advantages such as ease of use, rapid application, accuracy, and good separation. It performs exceptionally well in controlling seed diseases in rice and other crops, showing good control effects against rice bakanae disease, sesame leaf spot, and rice blast. As a seed dressing agent, tebuconazole has extremely high safety and is suitable for various crops, including corn, wheat, rice, peanuts, and cotton. Compared to similar fungicides such as tebuconazole and difenoconazole, it has a broader fungicidal spectrum and a longer residual effect.

[0010] Fludioxonil is a highly effective seed treatment fungicide capable of controlling various crop diseases, especially root diseases such as damping-off, root rot, wilt, and stem blight. Its active ingredient exhibits significant protective efficacy against a variety of pathogens, including ascomycetes, basidiomycetes, and deuteromycetes. When treating seeds, only a small amount of the active ingredient is systemic, but this is sufficient to kill pathogens on the seed surface and within the seed coat, and it shows no cross-resistance with any existing fungicides. Furthermore, fludioxonil forms a rapid, non-shedding film after seed treatment, and the active ingredient remains stable and long-lasting in the soil, forming a protective barrier lasting for more than four months. Fludioxonil is extremely safe for crop seeds, does not affect germination, and promotes earlier, more uniform, and vigorous germination. Due to its extremely low toxicity, it is very safe for humans and animals, and as a chemically synthesized biomimetic agent, it is ideally suited for the production of pollution-free vegetables.

[0011] Thiamethoxam is a second-generation neonicotinoid insecticide, exhibiting higher activity and a broader spectrum of insecticidal effects compared to first-generation insecticides such as thiamethoxam and imidacloprid. Its molecular structure features a chlorothiazolium group replacing the pyridine group and a nitroimide replacing the nitromethylene moiety. These changes enhance its activity against piercing-sucking pests and also have a stronger effect on chewing pests. Thiamethoxam is not easily leached into the soil, has a long residual effect (up to 30 days for foliar spraying and up to 6 months for soil treatment), and its strong systemic properties allow it to kill both above-ground and underground pests, making it particularly suitable for seed treatment with high efficiency. Thiamethoxam has extremely high safety, minimal impact on non-target organisms, and is suitable for application on various crops such as peanuts, wheat, and rice, with broad market prospects.

[0012] The wetting and dispersing agent is composed of 2-6 parts by weight of sodium lignosulfonate, 1-4 parts of tristyrylphenol polyoxyethylene ether, and 2-5 parts of fatty alcohol sulfate.

[0013] Sodium lignosulfonate is a natural polymer compound with excellent wetting properties. It can significantly reduce the surface tension of water, making it easier for solid particles in the suspension to be wetted by water. As an anionic surfactant, sodium lignosulfonate can form a negative charge layer on the surface of solid particles, preventing particle aggregation through electrostatic repulsion and improving the dispersion stability of the suspension. Sodium lignosulfonate is derived from renewable resources, is environmentally friendly, and has good compatibility with other pesticide components, and will not have adverse effects on seeds or crops.

[0014] The tristyrylphenol polyoxyethylene ether is a nonionic surfactant. The ether has excellent emulsifying and wetting ability, which can promote the dispersion of oil-soluble components in water and form a stable emulsion. During preparation and use, adding an appropriate amount can reduce foaming caused by stirring or spraying, making it easier to operate and use.

[0015] The fatty alcohol sulfate is a highly efficient anionic surfactant with strong wetting and penetrating capabilities. It can rapidly reduce the surface tension of water, promote the wetting of solid particles in suspension, and, in synergy with other surfactants, further enhance the dispersibility and stability of the suspension, ensuring that it does not separate or precipitate during long-term storage and use. Fatty alcohol sulfate is also readily biodegradable, has little environmental impact, and meets the requirements of green agriculture.

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

[0017] The polyacrylate possesses excellent film-forming properties, forming a uniform and breathable film on the seed surface to effectively lock in moisture and nutrients while slowly releasing the active ingredients, thus prolonging the efficacy. Polylactic acid (PLA) is a biodegradable material with good biocompatibility and complete degradability, preventing long-term pollution of soil and the environment. PLA forms a film on the seed surface, and by controlling its molecular weight and crystallinity, it enables sustained drug release, improving the duration of efficacy. Sodium alginate, derived from marine algae, is a natural high-molecular-weight polysaccharide that is environmentally safe and harmless. It forms a moisturizing film on the seed surface, reducing moisture evaporation and providing a microenvironment conducive to seed germination. Chitosan possesses natural antibacterial properties, effectively inhibiting harmful microorganisms in the soil and protecting seeds from pathogens. Chitosan forms a protective film on the seed surface, slowing the release rate of the active ingredients and extending the efficacy period.

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

[0019] Xanthan gum is a highly efficient natural thickener that significantly increases the viscosity of suspensions, enhances system stability, and prevents the sedimentation or stratification of active ingredients. Xanthan gum imparts good rheological properties to suspensions, allowing them to evenly cover the seed surface during spraying and improving pesticide utilization. Gelatin is also a commonly used thickener that increases the viscosity of suspensions and improves their physical stability. Gelatin has film-forming properties, forming a thin film on the seed surface, which helps in the slow release of active ingredients and protects the seeds. Magnesium aluminum silicate is an inorganic thickener with extremely high thickening efficiency, significantly increasing the viscosity of suspensions. Magnesium aluminum silicate imparts good thixotropic properties to suspensions, meaning it maintains high viscosity at rest but decreases in viscosity under shear stress, making it easy to use.

[0020] The stabilizer is sodium dodecylbenzenesulfonate.

[0021] This invention provides a seed treatment suspension of tebuconazole, fludioxonil, and thiamethoxam. It has the following beneficial effects:

[0022] 1. This invention introduces film-forming agents, such as polyacrylate, polylactic acid, and chitosan, to form a protective film on the seed surface. This film effectively locks in moisture and nutrients while slowly releasing the active ingredients, prolonging the duration of the effect. This not only improves the utilization rate of the drug but also ensures that the crop receives continuous protection throughout its growth cycle, thereby improving the overall yield and quality of the crop.

[0023] 2. This invention provides broad-spectrum fungicidal and insecticidal effects through the combination of tebuconazole, fludioxonil, and thiamethoxam, effectively controlling a variety of crop diseases and pests. The use of a wetting and dispersing agent ensures uniform dispersion of the active ingredients in the aqueous phase, improving the stability of the suspension. A film-forming agent forms a protective layer on the seed surface, extending the efficacy period and reducing the loss of active ingredients. A thickener increases the viscosity of the suspension, improving physical stability and facilitating use. The addition of sodium dodecylbenzenesulfonate, a stabilizer, further enhances the product's stability, ensuring no stratification or sedimentation during long-term storage and use.

[0024] 3. The sodium lignosulfonate and other natural polymer compounds used in this invention possess excellent wetting properties and biocompatibility, and will not have adverse effects on the environment or non-target organisms. Fatty alcohol sulfates, as highly efficient anionic surfactants, have strong wetting and penetrating capabilities and are readily biodegradable, meeting the requirements of green agriculture. These characteristics not only improve the efficiency of pesticide use but also reduce negative environmental impacts, contributing to sustainable agricultural production. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1:

[0027] Formula: 1 part cymoxanil, 2.5 parts fludioxonil, 2 parts thiamethoxam, 5 parts wood ash, 4 parts sodium lignosulfonate, 2 parts tristyrene-phenylphenol polyoxyethylene ether, 3 parts fatty alcohol sulfate, 1 part acrylate, 1 part polylactic acid, 1 part sodium alginate, 1 part chitosan, 2 parts xanthan gum, 1 part gelatin, 2 parts magnesium aluminum silicate, 0.5 parts sodium dodecylbenzenesulfonate, and 64 parts water.

[0028] Preparation steps:

[0029] S1: Weigh the tebuconazole, fludioxonil, and thiamethoxam according to the specified ratio, add them to ethyl acetate, and start stirring. Set the heating temperature to 40℃~50℃ and stir at 300~500rpm for 10~15 minutes at 40℃~50℃ to ensure initial mixing of the raw materials and solvent. Then, increase the temperature to 60~70℃ while reducing the stirring speed to 100~200rpm, and continue stirring for 20~30 minutes to ensure that all components are fully dissolved and form a homogeneous oil phase.

[0030] S2: First, the dried wood ash is pulverized and passed through a 200-mesh sieve. The sieved wood ash is then added to deionized water to form a suspension. The suspension is then heated to 50℃–60℃ and stirred at 200–400 rpm for 30–60 minutes. After adding a wetting and dispersing agent, stirring continues at 50–60℃ for 15–60 minutes, with the stirring speed reduced to 100–200 rpm. Next, a film-forming agent, thickener, and stabilizer are added to the mixture. In this step, the temperature is controlled at 40–60℃, the stirring speed is maintained at 100–200 rpm, and the stirring time is 10–20 minutes to form a stable aqueous phase.

[0031] S3: Under high-speed stirring, the oil phase is slowly added to the aqueous phase, stirred at room temperature, with the stirring speed set at 5000-7000 rpm, and stirred for 30-60 minutes to obtain a seed treatment suspension of tebuconazole-fludioxonil-thiamethoxam.

[0032] In this embodiment, the combination of tebuconazole, fludioxonil, and thiamethoxam provides broad-spectrum fungicidal and insecticidal effects, effectively controlling a variety of crop diseases and pests. The use of a wetting and dispersing agent ensures uniform dispersion of the active ingredients in the aqueous phase, improving the stability of the suspension. A film-forming agent forms a protective layer on the seed surface, extending the efficacy period and reducing the loss of active ingredients. A thickener increases the viscosity of the suspension, improving physical stability and facilitating use. The addition of sodium dodecylbenzenesulfonate, a stabilizer, further enhances product stability, ensuring no stratification or sedimentation during long-term storage and use.

[0033] Example 2:

[0034] Formula: 2 parts of tebuconazole, 3 parts of fludioxonil, 3 parts of thiamethoxam, 5 parts of wood ash, 5 parts of sodium lignosulfonate, 3 parts of tristyrene-phenylphenol 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 dodecylbenzenesulfonate, and 64.25 parts of water.

[0035] Preparation steps: Same as in Example 1.

[0036] In this embodiment, increasing the proportions of tebuconazole, fludioxonil, and thiamethoxam can enhance the control effect on diseases and pests. At the same time, increasing the proportions of wetting and dispersing agents and film-forming agents helps to improve the stability and adhesion of the suspension.

[0037] Example 3:

[0038] Formula: 1 part cymoxanil, 2 parts fludioxonil, 1 part thiamethoxam, 3 parts wood ash, 3 parts sodium lignosulfonate, 1 part tristyrylphenol polyoxyethylene ether, 2 parts fatty alcohol sulfate, 0.75 parts polyacrylate, 0.75 parts polylactic acid, 1.5 parts sodium alginate, 1.5 parts chitosan, 1.5 parts xanthan gum, 1.5 parts gelatin, 3 parts magnesium aluminum silicate, 0.5 parts sodium dodecylbenzenesulfonate, and 77.5 parts water.

[0039] Preparation steps: Same as in Example 1.

[0040] In this embodiment, reducing the proportion of active ingredients can lower costs while maintaining a certain level of preventative effect. Increasing the proportion of thickener helps improve the viscosity and stability of the suspending agent, making it suitable for cost-sensitive applications requiring a certain level of stability.

[0041] Example 4:

[0042] Formula: 2 parts of tebuconazole, 3 parts of fludioxonil, 3 parts of thiamethoxam, 7 parts of wood ash, 6 parts of sodium lignosulfonate, 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 dodecylbenzenesulfonate, and 47 parts of water.

[0043] Preparation steps: Same as in Example 1.

[0044] In this embodiment, increasing the proportion of all components can significantly improve the prevention and control effect and stability of the suspension, but it will also increase the cost.

[0045] Example 5:

[0046] Formula: 0.5 parts of tebuconazole, 1 part of fludioxonil, 2 parts of thiamethoxam, 2 parts of sodium lignosulfonate, 4 parts of wood ash, 2 parts of tristyrene-phenylphenol 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 dodecylbenzenesulfonate, and 79 parts of water.

[0047] Preparation steps: Same as in Example 1.

[0048] In this embodiment, reducing the proportion of active ingredients and auxiliary ingredients can significantly reduce costs, but may sacrifice some prevention and control effects and stability.

[0049] Physicochemical performance testing:

[0050] According to the national standard requirements for pesticide suspension concentrates, the performance of the seed treatment suspension concentrates prepared in Examples 1-5 (such as tebuconazole·fludioxonil·thiamethoxam) was tested, and the results are shown in Table 1.

[0051]

[0052] Field efficacy trial 1: Efficacy test of seed treatment suspension of tebuconazole·fludioxonil·thiamethoxam against wheat stem base rot.

[0053] Treatment method: Each treatment was repeated 4 times. Sowing was completed on the same day for each treatment. Before sowing, the seed treatment suspension of cymoxanil·fludioxonil·thiamethoxam was thoroughly mixed with the seeds to ensure that the solution was evenly distributed on the seeds. After spreading them out to dry, they were sown on the same day.

[0054] Soil type at the test site: loam, pH 6.9, organic matter content 2.3%.

[0055] Community area: The community area is 66m² 2 Each community is spaced 1 meter apart as a protective row.

[0056] Emergence rate survey: During the wheat seedling stage, observe the emergence time, emergence rate, crop growth, and presence of pesticide damage for each treatment.

[0057]

[0058] Investigation of wheat stem base rot: During the late grain-filling stage of wheat, samples were taken from 5 points in a zigzag pattern in each plot, with 30 plants at each point. The disease index was calculated, and the wheat stem base rot was classified into the following four levels according to its development:

[0059] Grade 0 - Healthy: The wheat plants show no signs of disease, the base of the stem is not discolored, and the plants are growing normally.

[0060] Grade 1 - Mild: Slight brown or dark brown spots appear at the base of the wheat stem, but do not affect the normal growth and development of the plant. The surface area of ​​the lesions is less than 1 / 4 of the total surface area of ​​the stem and roots.

[0061] Level 2 - Moderate: Numerous lesions are present at the base of the wheat stem, with the lesion surface area accounting for 1 / 4 of the total surface area of ​​the stem and roots. 1 / 2;

[0062] Grade 3 - Severe: Severe browning occurs at multiple nodes at the base of the wheat stem, with the lesions extending to multiple internodes. The stem is easily broken, and the lesions are numerous and large, covering half of the total surface area of ​​the stem and roots. 3 / 4;

[0063] 4 doses - Extremely severe: The surface area of ​​the lesions is greater than 3 / 4 of the total surface area of ​​the stem and roots, the main root is not completely necrotic, and the above-ground parts are wilted;

[0064] Level 5 - Death: The plant has withered and died.

[0065]

[0066] The experimental treatment design included formulations 1-5, which were the seed treatment suspensions prepared in Examples 1-5 (i.e., tebuconazole·fludioxonil·thiamethoxam), and formulation 6, which was water as a blank control. See Table 2 for details.

[0067]

[0068] Field efficacy trial 2: Efficacy test of seed treatment suspension of tebuconazole·fludioxonil·thiamethoxam against peanut root rot.

[0069] Treatment method: Each treatment was repeated 4 times. Sowing was completed on the same day for each treatment. Before sowing, the seed treatment suspension of cymoxanil·fludioxonil·thiamethoxam was thoroughly mixed with the seeds to ensure that the solution was evenly distributed on the seeds. After spreading them out to dry, they were sown on the same day.

[0070] Soil type at the test site: loam, pH 7.1, organic matter content 2.0%.

[0071] Community area: The community area is 66m² 2 Each community is spaced 1 meter apart as a protective row.

[0072] Emergence rate survey: During the peanut seedling stage, observe the emergence time, emergence rate, crop growth, and presence of pesticide damage for each treatment.

[0073]

[0074] Survey of peanut root rot: During the peanut maturity period, samples were taken from 5 points in a zigzag pattern in each plot, with 30 plants at each point. The disease index was calculated, and based on the development of wheat stem base rot, it can be divided into the following four levels:

[0075] Grade 0 - Healthy: The root system is completely healthy, with no visible lesions, normal root bark color, and no signs of rot.

[0076] The plants are growing normally, with no symptoms such as wilting or yellowing.

[0077] Grade 1 - Mild: A small number of brown spots appear on the root bark, and the area of ​​the lesions does not exceed 25% of the root surface area.

[0078] Plant growth was slightly inhibited, but there was no obvious wilting or yellowing.

[0079] Grade 2 - Moderate: Numerous root bark lesions, covering 26% to 50% of the root surface area. Plant growth is hindered, and some yellowing may occur, but overall growth remains relatively normal.

[0080] Grade 3 - Severe: Root bark lesions are severe, covering 51% to 75% of the root surface area. Plant growth is significantly inhibited, with obvious yellowing and partial wilting, which may affect yield.

[0081] Level 4 - Extremely Severe: Root bark lesions are extremely severe, covering more than 75% of the root surface area, and the rhizome may completely rot. The plant wilts severely, turns yellow, and growth almost stops, seriously affecting yield.

[0082] Level 5 - Death: The plant has withered and died.

[0083]

[0084] Thirty days after sowing, investigate the occurrence of underground pests in each treatment. Peanut seedlings that are bitten or killed by underground pests such as grubs, mole crickets, cutworms, or wireworms are considered pest-damaged seedlings. Record the number of pest-damaged seedlings, calculate the pest-damaged seedling rate, and the control effect.

[0085]

[0086] The experimental treatment design included formulations 1-5, which were seed treatment suspensions prepared in Examples 1-5 using cyprodinil, fludioxonil, and thiamethoxam; and formulation 6, which was water, as a blank control. See Table 3 for details.

[0087]

[0088] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seed treatment suspension of cyprodinil, fludioxonil, and thiamethoxam, characterized in that, The product comprises the following components by weight: 0.5-2 parts of tebuconazole, 1-3 parts of fludioxonil, 1-3 parts of thiamethoxam, 5-15 parts of wetting and dispersing agent, 3-7 parts of wood 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; The wetting and dispersing agent is composed of 2-6 parts by weight of sodium lignosulfonate, 1-4 parts of tristyrylphenol polyoxyethylene ether, and 2-5 parts of fatty alcohol sulfate. The film-forming agent is composed of 0.5-3 parts polyacrylate, 0.5-3 parts polylactic acid, 0.5-3 parts sodium alginate and 0.5-3 parts chitosan by weight. The thickener, by weight, consists of 1-3 parts xanthan gum, 1-3 parts gelatin, and 1-4 parts magnesium aluminum silicate; The stabilizer is sodium dodecylbenzenesulfonate.

2. The seed treatment suspension concentrate of tebuconazole·fludioxonil·thiamethoxam according to claim 1, characterized in that, The method for preparing the seed treatment suspension includes the following steps: S1: Weigh the cyprodinil, fludioxonil, and thiamethoxam according to the specified ratio, add them to ethyl acetate, and start stirring. Set the heating temperature to 40℃~50℃ and the initial stirring speed to 300~500rpm. Continue stirring for 10~15 minutes to ensure that the components are initially mixed. Then, gradually increase the temperature to 60~70℃ and gradually decrease the stirring speed to 100~200rpm. 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 and passed through a 200-mesh sieve. The sieved wood ash is then added to deionized water to form a suspension. The suspension is then heated to 50℃~60℃ and stirred at 200~400 rpm for 30min~60min while maintaining the temperature. After adding a wetting and dispersing agent, stirring continues at 50~60℃ for 15min~60min, and the stirring speed is reduced to 100~200 rpm. Next, a film-forming agent, thickener, and stabilizer are added to the mixture. In this step, the temperature is controlled at 40~60℃, the stirring speed is maintained at 100~200 rpm, and the stirring time is 10min~20min to form a stable aqueous phase. S3: Under high-speed stirring, the oil phase is slowly added to the aqueous phase, stirred at room temperature, with the stirring speed set at 5000-7000 rpm, and stirred for 30-60 minutes to obtain a seed treatment suspension of tebuconazole-fludioxonil-thiamethoxam.

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