Fluazinam·flumetover·clothianidin composition, preparation method and application

Abstract

The application discloses a fluopicolide+fludioxonil+clothianidin composition, a preparation method and application, relates to the technical field of pesticides, and particularly relates to a fluopicolide+fludioxonil+clothianidin composition, a preparation method and application.The active ingredients of the fluopicolide+fludioxonil+clothianidin composition disclosed by the application include the following components by weight: 15-40 parts of fluopicolide, 1-20 parts of fludioxonil and 25-50 parts of clothianidin.The fluopicolide+fludioxonil+clothianidin composition provided by the application has the advantages that the composition can effectively prevent seeds from being attacked by pests and pathogenic bacteria during the germination and seedling stages, reduce the loss caused by diseases and pests, and improve the yield and quality of crops.

Description

Technical Field

[0001] This application relates to the field of pesticide technology, and in particular to a composition containing fluopyram·fluopyram·thiamethoxam, its preparation method and application. Background Technology

[0002] Seed treatment agents offer numerous advantages, including high efficiency, economy, environmental friendliness, long residual effect, multifunctionality, and ease of mechanization, making them an effective way to reduce pesticide use and improve pesticide utilization. Since pathogens carried by seeds and in the soil often affect seed germination, leading to seedling loss and crop failure, seed treatment agents, with their film-forming, slow-release, stable, and systemic properties, can provide nutrients and protection to seeds during a certain growth period. They also have a certain effect in killing underground pests, preventing seed-borne pathogens, and controlling seedling diseases. BTH (benzothiadiazole, produced by Syngenta, Switzerland) and TDL (thiamethoxam, produced by Nippon Nippon Kogyo Co., Ltd.) are representative products of this class of agents and are currently widely used in agricultural production. However, because thiamethoxam alone exhibits unstable performance in the field, its efficacy fluctuates, and it has no good therapeutic effect on already diseased plants.

[0003] Seeds and seedlings are highly susceptible to damage and infection from various underground and above-ground pests and pathogens, making them the most vulnerable link in crop growth. Furthermore, pest infestation or pathogen infection leading to diseased or dead seedlings reduces the effective number of plants per unit area, resulting in significant yield reduction and quality decline. Frequent use of seed treatment agents containing single active ingredients yields poor results and has a narrow scope of action, failing to effectively eliminate pathogens. While methamidophos and fludioxonil are highly effective as inducers and fungicides, long-term use as single agents can easily lead to disease resistance, resulting in increased dosage, reduced efficacy, and shorter duration of action, which is detrimental to environmental sustainability. Moreover, some seed treatment agents do not significantly improve seed germination rates. Therefore, a new type of product is needed to replace seed treatment agents with single active ingredients, increasing efficacy, delaying disease progression, improving germination rates, and reducing economic losses. Summary of the Invention

[0004] In order to solve at least one of the above-mentioned technical problems and to develop a composition with high insect control efficiency, reduced disease, and improved seed growth, this application provides a composition of fluopyram·fluopyram·thiamethoxam, its preparation method, and its application.

[0005] In a first aspect, this application provides a composition containing fluopyram, fludioxonil, and thiamethoxam, wherein the composition comprises, by weight, the following components: 15-40 parts of fluopyram, 1-20 parts of fludioxonil, and 25-50 parts of thiamethoxam.

[0006] By adopting the above technical solution, this application can effectively prevent seeds from being attacked by pests and pathogens during germination and seedling stages by treating seeds with a composition containing fluopyram, fludioxonil, and thiamethoxam, thereby reducing losses caused by pests and diseases and improving the yield and quality of crops.

[0007] Optionally, the composition comprises, by weight, the following components: 25-40 parts of fluopyram, 12-20 parts of fludioxonil, and 38-50 parts of thiamethoxam.

[0008] Optionally, the composition containing fluopyram·fluopyram·thiamethoxam further includes Bacillus subtilis, wherein the active ingredient content of Bacillus subtilis is 1.0×10⁸~1.0×10¹² CFU / g.

[0009] Secondly, this application provides a seed treatment agent for sterilization, the seed treatment agent comprising the composition of fluopyram·fluopyram·thiamethoxam described in this application;

[0010] The composition containing fluopyram·fluopyram·thiamethoxam has a mass percentage of 20-60% in seed treatment.

[0011] By adopting the above technical solution, this application prepares a fungicide seed treatment agent using a composition containing fluopyram, fludioxonil, and thiamethoxam as a base ingredient. This agent can provide comprehensive insect control and protection for seeds, reduce the occurrence of diseases, and improve crop yield and quality.

[0012] Optionally, the seed treatment agent for sterilization further includes a basic component; the basic component accounts for 40-80% of the mass percentage of the seed treatment agent for sterilization.

[0013] The basic ingredients, by weight, include the following components: 10-20 parts seaweed extract, 15-30 parts mulberry leaf extract, 5-10 parts gibberellin, 5-10 parts eggshell extract, 20-30 parts kaolin, 7-15 parts chitosan, and 30-45 parts water.

[0014] By adopting the above technical solutions, the basic components provided in this application can further enhance the antibacterial effect on seeds, while also promoting seed germination and seedling growth, effectively improving seed growth and yield. Specifically, seaweed extract and gibberellin promote seed germination and growth, while eggshell extract, rich in minerals such as calcium and phosphorus, contributes to healthy seed germination and seedling growth. Mulberry extract not only increases seed germination rate but also provides antibacterial effects.

[0015] Optionally, the seed treatment agent for sterilization further includes a basic component; the basic component accounts for 40-80% of the mass percentage of the seed treatment agent for sterilization.

[0016] The basic ingredients, by weight, include the following components: 10-20 parts seaweed extract, 15-30 parts mulberry leaf extract, 5-10 parts gibberellin, 5-10 parts eggshell extract, 20-30 parts kaolin, 7-15 parts chitosan, and 30-45 parts water.

[0017] Optionally, in the seed treatment agent for sterilization, the mass percentage of the composition containing fluopyram·fluopyram·thiamethoxam is 30-50%;

[0018] The mass percentage of the basic component is 50-70%.

[0019] Optionally, the weight ratio of the mulberry leaf extract to gibberellin is (4-5):1.

[0020] Thirdly, this application provides a method for preparing a seed treatment agent for sterilization, the preparation method comprising the following steps: S1, crushing fresh mulberry leaves and waste eggshells respectively, then mixing and stirring with 2 times the volume of ethanol, boiling for 5-8 minutes, letting stand, extracting the supernatant, and obtaining mulberry leaf extract and eggshell extract respectively for later use.

[0021] S2. Mix parts by weight of fluopyram, fludioxonil, thiamethoxam and water to prepare the first mixture;

[0022] S3. The seaweed extract, mulberry leaf extract, gibberellin, eggshell extract and water are mixed to prepare the second mixture;

[0023] S4. Mix the first mixture with the second mixture, then add kaolin and chitosan and stir to obtain a seed treatment agent for sterilization.

[0024] By adopting the above technical solution, the bactericidal seed treatment agent prepared in this application can be used to treat seeds, achieving the effects of sterilization and promoting seed growth and development.

[0025] Fourthly, this application provides an application of a bactericidal seed treatment agent in the field of controlling crop pests.

[0026] By adopting the above technical solution, seed treatment with this fungicide can provide preventative protection for crops during the planting process, maintaining crop health and stable yield. After seed treatment, the active ingredients can remain on the surface of seeds and seedlings for a long time, forming a protective layer that provides lasting protection against and kills pests. The active ingredients used in this seed treatment are environmentally friendly and will not pollute the ecosystem, meeting environmental protection requirements. Seed treatment can reduce the amount of pesticides used, lower pesticide costs, and reduce the frequency of application, thus reducing labor and resource costs. In summary, the fungicide seed treatment provided in this application has broad application prospects in controlling crop pests, effectively controlling pest damage, improving crop yield and quality, reducing pesticide use, and possessing advantages of being environmentally friendly, economical, and highly efficient.

[0027] Optionally, the crop includes soybean seeds and peanut seeds.

[0028] By adopting the above technical solution, the seed treatment agent provided in this application has an insecticidal effect on various pests on soybean and peanut seeds, such as nematodes, root rot, and underground pests, and can effectively prevent and control the damage caused by pests.

[0029] In summary, the present invention has at least one of the following beneficial technical effects:

[0030] 1. This application utilizes a composition containing fluopyram, fludioxonil, and thiamethoxam to treat seeds, which can effectively prevent seeds from being attacked by pests and pathogens during germination and seedling stages, promote seed growth and development, reduce losses caused by pests and diseases, and improve crop yield and quality.

[0031] 2. This application utilizes a composition containing fluopyram, cyprodinil, and thiamethoxam, along with basic ingredients, to prepare a fungicide seed treatment agent. This agent provides comprehensive insect control and protection for seeds, reduces disease occurrence, and improves crop yield and quality. The active ingredients in the composition possess potent fungicidal activity, capable of killing pathogens on the seed surface and inside, reducing the risk of seed-borne diseases, and ensuring healthy crop growth. The basic ingredients further enhance the antibacterial effect on seeds while promoting seed germination and seedling growth, effectively improving seed growth and yield.

[0032] 3. The fungicide seed treatment agent provided in this application has broad application prospects in the prevention and control of crop pests. It can effectively control pest damage, improve crop yield and quality, reduce pesticide use, and has the advantages of being environmentally friendly, economical, and efficient. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the embodiments.

[0034] Fluopyram: Manufacturer is Hubei Xinghengye Technology Co., Ltd. CAS No.: 658066-35-4.

[0035] Fludioxonil: Manufacturer: Jinan Rongzheng Chemical Co., Ltd. CAS No.: 131341-86-1.

[0036] Thiamethoxam: Manufacturer: Hubei Jiufenglong Chemical Co., Ltd. CAS No.: 210880-92-5.

[0037] Bacillus subtilis: Manufacturer is Jinan Hongxinda Biotechnology Co., Ltd. Brand: Hongxinda;

[0038] Seaweed extract: Guangzhou Huayu Biotechnology Co., Ltd.

[0039] Gibberellin: CAS number 77-06-5.

[0040] Chitosan: The manufacturer is Qingdao Yuekang Biotechnology Co., Ltd.

[0041] Preparation Examples 1-9

[0042] Preparation Example 1

[0043] This preparation example provides a composition containing fluopyram, fludioxonil, and thiamethoxam. The composition comprises the following components by weight: 15 parts fluopyram, 1 part fludioxonil, and 25 parts thiamethoxam.

[0044] Preparation Examples 2-6

[0045] The difference between Preparation Examples 2-6 and Preparation Example 1 is that the weight parts of some components are different. The differences are shown in Table 1.

[0046] Table 1 - Differences between Preparation Examples 2-6 and Preparation Example 1

[0047]

[0048] Preparation Examples 7-9

[0049] Preparation Example 7

[0050] The difference between this preparation example and Preparation Example 5 is that the composition containing fluopyram·fluopyram·thiamethoxam in this preparation example also contains Bacillus subtilis, and the content of the active ingredient of Bacillus subtilis is 1.0 × 10⁻⁶. 8 CFU / g.

[0051] Preparation Example 8

[0052] The difference between this preparation example and Preparation Example 5 is that the composition of Bacillus subtilis containing fluopyram·fluopyram·thiamethoxam in this preparation example has an active ingredient content of 1.0 × 10⁻⁶. 11CFU / g.

[0053] Preparation Example 9

[0054] The difference between this preparation example and Preparation Example 5 is that the composition containing fluopyram·fluopyram·thiamethoxam in this preparation example also contains Bacillus subtilis, and the content of the active ingredient of Bacillus subtilis is 1.0 × 10⁻⁶. 12 CFU / g.

[0055] Example 1

[0056] This embodiment provides a bactericidal seed treatment agent, which includes an active ingredient and a base ingredient;

[0057] The active ingredient is the composition containing fluopyram, fludioxonil, and thiamethoxam prepared in Preparation Example 1. The weight percentage of fluopyram, fludioxonil, and thiamethoxam in the fungicide seed treatment agent is 20%.

[0058] The basic component accounts for 80% by weight in the fungicide seed treatment agent.

[0059] The basic ingredients, by weight, include the following: 10 parts seaweed extract, 15 parts mulberry leaf extract, 5 parts gibberellin, 5 parts eggshell extract, 20 parts kaolin, 7 parts chitosan, and 30 parts water.

[0060] The preparation method of a bactericidal seed treatment agent in this embodiment is as follows:

[0061] S1. Crush fresh mulberry leaves and discarded eggshells separately, then mix and stir with 2 times the volume of ethanol, boil for 8 minutes, let stand, and extract the supernatant to obtain mulberry leaf extract and eggshell extract respectively, for later use.

[0062] S2. Mix parts by weight of fluopyram, fludioxonil, thiamethoxam and water to prepare the first mixture;

[0063] S3. The seaweed extract, mulberry leaf extract, gibberellin, eggshell extract and water are mixed to prepare the second mixture;

[0064] S4. Mix the first mixture with the second mixture, then add kaolin and chitosan and stir to obtain a seed treatment agent for sterilization.

[0065] The ratio of water used in steps S1 and S2 is 1:2.

[0066] Examples 2-9

[0067] The difference between Examples 2-9 and Example 1 is that the composition containing fluopyram·fluopyram·thiamethoxam is different, and the differences are shown in Table 2.

[0068] Table 2 - Differences between Examples 2-9 and Example 1

[0069] Example Active ingredients Example 1 Preparation Example 1 Example 2 Preparation Example 2 Example 3 Preparation Example 3 Example 4 Preparation Example 4 Example 5 Preparation Example 5 Example 6 Preparation Example 6 Example 7 Preparation Example 7 Example 8 Preparation Example 8 Example 9 Preparation Example 9

[0070] Comparative Examples 1-6

[0071] Comparative Example 1

[0072] The bactericidal seed treatment agent prepared in this comparative example did not contain mulberry leaf extract.

[0073] Comparative Example 2

[0074] The bactericidal seed treatment agent prepared in this comparative example did not contain gibberellin.

[0075] Comparative Example 3

[0076] The bactericidal seed treatment agent prepared in this comparative example did not contain eggshell extract.

[0077] Comparative Example 4

[0078] The bactericidal seed treatment agent prepared in this comparative example did not contain mulberry leaf extract or gibberellin.

[0079] Comparative Example 5

[0080] The seed treatment agent for fungicide prepared in this comparative example did not contain a composition containing fluopyram, fludioxonil, and thiamethoxam.

[0081] Comparative Example 6

[0082] The bactericidal seed treatment agent prepared in this comparative example did not contain any basic components.

[0083] Experimental testing

[0084] In this experiment, the seed treatment agents for sterilization prepared in Examples 1-9 and the seed treatment agents for sterilization prepared in Comparative Examples 1-6 were used to treat peanut seed samples. A total of 16 peanut seed samples were tested.

[0085] One group was a control group, in which water was used instead of the seed treatment agent for sterilization.

[0086] Each set weighs 1 kg.

[0087] The processing method is as follows:

[0088] Step 1: Mix 15g of seed treatment agent for sterilization with 1L of water to prepare a mixture for later use;

[0089] Step 2: Soak the seeds in the mixture for 12 hours.

[0090] Step 3: Ensure that the seeds fully absorb the solution so that the pesticide components adhere evenly to the seed surface;

[0091] Step 4: Dry the treated seeds in the sun and then sow them. See Table 4 for the effect on pest control.

[0092] Insect mortality rate (%) = (Number of live insects before application - Number of live insects after application) / Number of live insects before application.

[0093] Control efficacy (%) = [(Insect mortality rate in the treated area - Insect mortality rate in the control area) / 100 - Insect mortality rate in the control area] * 100%.

[0094] Peanut germination rate = (Total number of germinated peanuts / Total number of peanut seeds) * 100%.

[0095] [∑[Number of diseased leaves at each level * Relative value] / (Total number of surveys * 9)] * 100 = Disease index

[0096] Control efficacy (%) = [1 - (disease index before treatment in the control area * disease index after treatment in the treated area) / (disease index after treatment in the control area - disease index before treatment in the treated area)] * 100.

[0097] The test results of Examples 1-9 and Comparative Examples 1-6 are shown in Table 3.

[0098] Table 3 - Test Results of Examples 1-9 and Comparative Examples 1-6

[0099]

[0100] Results analysis:

[0101] The difference between Examples 2-6 and Example 1 lies in the selection of active ingredients in the preparation of the fungicide seed treatment agent. According to the results in Tables 1 and 4, the fungicide seed treatment agent prepared in Example 8 has a stronger effect on the control of peanut root rot and peanut root-knot nematodes.

[0102] The difference between Examples 7-9 and Example 1 is that, in the preparation of the seed treatment agent for sterilization, the active ingredient also includes Bacillus subtilis. According to the results in Table 4, the addition of Bacillus subtilis further improves the control effect on peanut root rot and peanut root-knot nematodes when preparing the active ingredient.

[0103] The difference between Comparative Example 1 and Example 1 is that the bactericidal seed treatment agent prepared in this comparative example did not contain mulberry leaf extract.

[0104] The difference between Comparative Example 2 and Example 1 is that no gibberellin was added when preparing the bactericidal seed treatment agent in this comparative example.

[0105] The difference between Comparative Example 3 and Example 1 is that no eggshell extract was added when preparing the bactericidal seed treatment agent in this comparative example.

[0106] The difference between Comparative Example 4 and Example 1 is that mulberry leaf extract and gibberellin were not added when preparing the bactericidal seed treatment agent in this comparative example.

[0107] Based on the results of Comparative Examples 1-4 and Table 3, it can be seen that in the preparation of seed treatment agents for sterilization, the absence of any component in the basic ingredients will affect the germination rate of peanuts.

[0108] The difference between Comparative Example 5 and Example 1 is that the seed treatment agent prepared in this comparative example did not contain a composition containing fluopyram·fluopyram·thiamethoxam. As shown in Table 3, the composition without fluopyram·fluopyram·thiamethoxam results in less effective control of peanut root rot and peanut root-knot nematodes, thus affecting seed germination rate.

[0109] The difference between Comparative Example 6 and Example 1 is that no basic components were added when preparing the fungicide seed treatment agent in this comparative example. As shown in Table 3, omitting the basic components during the preparation of the fungicide seed treatment agent results in slow peanut germination.

[0110] Examples 10-13

[0111] The difference between Examples 10-13 and Example 8 lies in the selection of the base components. The differences are shown in Table 4.

[0112] Table 4 - Differences between Examples 10-12 and Example 8

[0113]

[0114] The test results of Examples 10-13 are shown in Table 5.

[0115] Table 5 - Test Results of Examples 10-13

[0116]

[0117]

[0118] Results Analysis: The difference between Examples 10-13 and Example 8 lies in the selection of different basic components in the preparation of the fungicide seed treatment agent. Combined with the results in Table 4, it can be seen that when the fungicide seed treatment agent prepared in Example 12 is used, it not only improves the germination efficiency of peanuts but also enhances the control effect of the fungicide seed treatment agent against peanut root rot and peanut root-knot nematodes. The inventors have discovered that, while keeping the active ingredients unchanged, changing the basic components can, to a certain extent, improve the control effect against peanut root rot and peanut root-knot nematodes. The inventors hypothesize that, in the control of peanut root rot and peanut root-knot nematodes, the combined use of basic and active components can not only improve the control effect but also promote the germination rate of peanuts.

[0119] Examples 14-17

[0120] Example 14

[0121] The difference between this embodiment and Example 12 is that in this embodiment, the mass percentage of the active ingredient is 30% and the mass percentage of the base ingredient is 70%.

[0122] Example 15

[0123] The difference between this embodiment and Example 12 is that in this embodiment, the mass percentage of the active ingredient is 45% and the mass percentage of the base ingredient is 55%.

[0124] Example 16

[0125] The difference between this embodiment and Example 12 is that in this embodiment, the mass percentage of the active ingredient is 50% and the mass percentage of the base ingredient is 50%.

[0126] Example 17

[0127] The difference between this embodiment and Example 12 is that in this embodiment, the mass percentage of the active ingredient is 60% and the mass percentage of the base ingredient is 40%.

[0128] The results of Examples 14-17 and Example 12 are shown in Table 6.

[0129] Table 6 - Results of Examples 14-17 and Example 12

[0130]

[0131]

[0132] Results analysis:

[0133] The difference between Examples 14-17 and Example 13 is that the mass percentages of the basic component and the active component are different. According to the results in Table 4, when the mass percentages of the basic component and the active component are both 50%, it not only has a good effect on improving the germination rate of peanuts, but also has a strong control effect on peanut root rot and peanut root-knot nematodes.

[0134] Examples 18-21

[0135] Example 18

[0136] The difference between this embodiment and Embodiment 16 is that the total weight of mulberry leaf extract and gibberellin in this embodiment is 37 parts. The weight ratio of mulberry leaf extract to gibberellin is 4:1.

[0137] Example 19

[0138] The difference between this embodiment and Embodiment 16 is that the total weight of mulberry leaf extract and gibberellin in this embodiment is 37 parts. The weight ratio of mulberry leaf extract to gibberellin is 4.5:1.

[0139] Example 20

[0140] The difference between this embodiment and Embodiment 16 is that the total weight of mulberry leaf extract and gibberellin in this embodiment is 37 parts. The weight ratio of mulberry leaf extract to gibberellin is 4.7:1.

[0141] Example 21

[0142] The difference between this embodiment and Embodiment 16 is that the total weight of mulberry leaf extract and gibberellin in this embodiment is 37 parts. The weight ratio of mulberry leaf extract to gibberellin is 5:1.

[0143] The experimental test results of Examples 18-21 are shown in Table 7.

[0144] Table 7 - Experimental Detection Results of Examples 18-21

[0145]

[0146]

[0147] Results analysis:

[0148] The difference between Examples 18-21 and Example 16 is that the weight ratio of mulberry leaf extract to gibberellin is different. According to the test results in Table 7, when the weight ratio of mulberry leaf extract to gibberellin is 4.7:1, it has a better effect on insect prevention, disease prevention and germination rate improvement.

[0149] In summary, by using the seed treatment agent provided in this application, seeds can be comprehensively protected against pests, diseases, and crop yield and quality can be improved. The active ingredients in the composition have a strong bactericidal effect, capable of killing pathogens on and inside the seeds, reducing the risk of seed-borne diseases, and ensuring healthy crop growth. The basic ingredients, such as seaweed extract, mulberry leaf extract, gibberellin, and eggshell extract, promote seed germination and seedling growth, effectively improving seed growth and yield.

[0150] Example 22

[0151] The difference between this embodiment and embodiment 20 is that the sample in this embodiment is a soybean seed sample. The experimental test results of this embodiment are shown in Table 8.

[0152] Table 8 - Experimental Detection Results of Example 22

[0153]

[0154] Results Analysis: Based on the experimental test results in Table 8, it can be seen that the fungicide seed treatment agent prepared in this embodiment has a good control effect on soybean root-knot nematode disease and soybean root rot, and can improve the germination rate of soybeans.

[0155] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A seed treatment agent for sterilization, characterized in that, The fungicide seed treatment agent comprises a composition containing fluopyram, fludioxonil, and thiamethoxam; the composition comprises the following components by weight: 15-40 parts of fluopyram, 1-20 parts of fludioxonil, and 25-50 parts of thiamethoxam. The composition containing fluopyram·fluopyram·thiamethoxam has a mass percentage of 20-60% in the seed treatment agent; The seed treatment agent for sterilization also includes a basic component; the basic component accounts for 40-80% by mass in the seed treatment agent for sterilization. The basic ingredients include the following components by weight: 10-20 parts seaweed extract, 15-30 parts mulberry leaf extract, 5-10 parts gibberellin, 5-10 parts eggshell extract, 20-30 parts kaolin, 7-15 parts chitosan, and 30-45 parts water.

2. The seed treatment agent for sterilization according to claim 1, characterized in that, The composition comprises the following components by weight: 25-40 parts of fluopyram, 12-20 parts of fludioxonil, and 38-50 parts of thiamethoxam.

3. The seed treatment agent for sterilization according to claim 1, characterized in that, The composition containing fluopyram·fludioxonil·thiamethoxam further includes Bacillus subtilis, wherein the effective ingredient content of Bacillus subtilis is 1.0 × 10⁻⁶. 8 ~1.0×10 12 CFU / g.

4. The seed treatment agent for sterilization according to claim 3, characterized in that, In the seed treatment agent for sterilization, the mass percentage of the composition containing fluopyram·fluopyram·thiamethoxam is 30-50%; The mass percentage of the basic component is 50-70%.

5. The seed treatment agent for sterilization according to claim 3, characterized in that, The weight ratio of the mulberry leaf extract to gibberellin is (4~5):

1.

6. A method for preparing a bactericidal seed treatment agent as described in claim 2, characterized in that, The preparation method includes the following steps: S1. Crush fresh mulberry leaves and discarded eggshells separately, then mix them with 2 times the volume of ethanol, boil for 5-8 minutes, let stand, and extract the supernatant to obtain mulberry leaf extract and eggshell extract, respectively, for later use. S2. Fluopyram, fluopyram, thiamethoxam and water are mixed to prepare the first mixture; S3. The seaweed extract, mulberry leaf extract, gibberellin, eggshell extract and water are mixed to prepare the second mixture; S4. Mix the first mixture with the second mixture, then add kaolin and chitosan and stir to obtain a seed treatment agent for sterilization.

7. The application of a seed treatment agent for sterilization as described in any one of claims 2 to 5 in the field of controlling crop pests.

8. The application of the seed treatment agent for sterilization according to claim 7 in the field of controlling crop pests, characterized in that, The crops mentioned include soybeans and peanuts.

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