A sulcotrion and alloxydim emulsion oil and a preparation method thereof

Abstract

The present application provides a kind of fluorine sulfonylureas in the emulsifiable concentrate of loxylone and its preparation method, the fluorine sulfonylureas in the emulsifiable concentrate of loxylone is composed of the following weight percentage components: fluorine sulfonylureas 2-30%, loxylone 2-30%, solvent A 5-20%, basic substance 0.1-5%, alcohol 2-10%, plant oil derivative product 2-20%, emulsifier 2-30%, solvent B makes up the rest.This emulsifiable concentrate of loxylone containing fluorine sulfonylureas is stable at low dilution, can be applied to aerial application, compared with traditional fluorine sulfonylureas and loxylone emulsifiable concentrate, the effect of weed control is better.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of pesticide preparation, and particularly relates to a flumeturon and alloxydim-containing emulsifiable concentrate and a preparation method thereof. BACKGROUND

[0002] The emulsifiable concentrate is one of the basic dosage forms of pesticides, is prepared by dissolving a pesticide in an organic solvent according to a certain proportion, and adding a certain amount of emulsifier to prepare a uniform transparent oily liquid which can form a relatively stable emulsion with water. The emulsifiable concentrate preparation has good stability, simple processing technology, and low requirement for equipment, and is an easy-to-process product.

[0003] The emulsion stability is an important index of the physical properties of the emulsifiable concentrate pesticide preparation, and is directly related to whether the active substance in the emulsion after dilution with water can maintain a good dispersed state for a long time so as to keep the concentration of the pesticide on the plant consistent before and after application, and also affects whether the sprayed pesticide solution can be absorbed, wetted and expanded on the plant.

[0004] With the continuous promotion of agricultural scale and modernization in China, the unmanned aerial vehicle (UAV) aerial spraying technology is rapidly developing and popularizing in China. The dilution stability of the pesticide is an important index in the process of UAV aerial spraying. The aerial spraying belongs to low-volume or ultra-low-volume combination, and whether the pesticide solution will precipitate, crystallize, flocculate and the like under low dilution is the key to determine whether the UAV nozzle is blocked and whether the aerial spraying can work normally.

[0005] Flumeturon, CAS registration number: 72178-02-0, chemical name: 5-(2-chloro-alpha, alpha, alpha-trifluoro-p-tolyloxy)-N-methylsulfonyl-2-nitrobenzamide, molecular formula: C 15 H 10 ClF3N2O6S, is a protoporphyrinogen oxidase inhibitor, absorbed by leaves and roots, and conducted in phloem. The pure product is a white crystalline solid which can form an aqueous solution of salt. It is mainly used for post-emergence weed control in soybean fields, and has a special effect on broadleaf weeds. The pesticide also has good activity in soil.

[0006] Alloxydim, CAS registration number: 74051-80-2 (I); 71441-80-0 (II), chemical name: (±)-(EZ)-2-(1-ethoxyiminobutyl)-5-[2-(ethylthio)propyl]-3-hydroxycyclohex-2-enone, molecular formula: C 17 H 29NO3S is an oily odorless liquid, soluble in most common organic solvents. Fenoxaprop is a selective systemic herbicide, belonging to fatty acid synthesis inhibitor, absorbed by stems and leaves and a small amount of roots, rapidly transmitted to the top and intercalary meristem, by inhibiting acetyl-CoA carboxylase (ACCase) and then inhibiting mitosis. It is used for broadleaf crops including cotton, rape, soybean, sugar beet, forage beet, sunflower, pineapple, potato, tobacco, peanut, strawberry, alfalfa, flax and other vegetables, to prevent and control annual and perennial weeds.

[0007] CN1284267A discloses a fluorine-containing sulfentrazone and fenoxaprop emulsion, the emulsion is composed of 6.2% sulfentrazone, 6.8% fenoxaprop, 6% emulsifier NP10, 18% emulsifier MOA-3, 7% N-dimethylformamide, 20% n-butyl or isobutyl oleate, and the rest is xylene; CN1398516A discloses a herbicidal composition containing sulfentrazone or trifloxysulfuron and fenoxaprop or quizalofop-p-ethyl, the emulsion is composed of 5-20% sulfentrazone, 5-20% fenoxaprop, 10-70% solvent, 6-30% stabilizer, 0.1-30% synergist.

[0008] However, in actual agricultural production, it is found that the above sulfentrazone·fenoxaprop emulsion products are relatively stable in the dilution range of 200-100 times, and no floating oil, precipitation and other phenomena occur, but due to the increasing resistance of weeds, especially in the northeast soybean planting area, the conventional dosage of pesticides cannot achieve the ideal control effect, so farmers will increase the dosage of pesticides by several times to achieve better weeding effect. The existing market sulfentrazone and fenoxaprop emulsion products often fail in the stability test at low dilution, showing that crystals and precipitates appear at the bottom after the diluted solution is static for 1 hour. In the actual application process of aerial spraying, the precipitation or crystallization of the emulsion will cause the nozzle to be blocked, affecting normal use, so that the product is difficult to meet the market and farmer demand. Therefore, how to improve the dilution stability of the sulfentrazone and fenoxaprop emulsion product in actual application, and then realize the popularization and application of the product in the field of aerial spraying and improve the control effect of weeds is a problem to be solved at present. SUMMARY

[0009] The purpose of the present application is to solve the problem that the traditional emulsion of sulfentrazone and fenoxaprop in the prior art will appear crystallization and precipitation at low dilution, and even block the nozzle, and provide a sulfentrazone and fenoxaprop emulsion, which has strong spreading ability on the leaf surface of weeds after application, can significantly improve the control effect on resistant weeds in soybean fields, can maintain good stability at low dilution, is not easy to precipitate or crystallize, can be widely used in the field of aerial spraying, and meets the needs of farmers and the market.

[0010] In order to achieve the above object, the present application adopts the following technical scheme: a fluazuron and alloxydim emulsifiable concentrate, characterized in that the emulsifiable concentrate is composed of the following components in percentage by weight: fluazuron 2-30%, alloxydim 2-30%, solvent A 5-20%, basic substance 0.1-5%, alcohol 2-10%, plant oil derivative product 2-20%, emulsifier 2-30%, and solvent B making up the balance;

[0011] Further, the emulsifiable concentrate is composed of the following components in percentage by weight: fluazuron 5-20%, alloxydim 5-20%, solvent A 5-15%, basic substance 0.1-3%, alcohol 2-10%, plant oil derivative product 2-20%, emulsifier 2-30%, and solvent B making up the balance, and the mass ratio of fluazuron to alloxydim is 12.5:8.3;

[0012] Still further, the percentage by weight of fluazuron in the emulsifiable concentrate is 12.5%, and the percentage by weight of alloxydim is 8.3%.

[0013] Further, the solvent A is one or more of N,N-dimethylformamide, cyclohexanone, phenylacetone or propylene carbonate;

[0014] Still further, the solvent A is a mixture of propylene carbonate and N,N-dimethylformamide.

[0015] Further, the basic substance is one or more of ethanolamine, triethanolamine, potassium hydroxide, sodium hydroxide or triethylamine;

[0016] Still further, the basic substance is triethanolamine.

[0017] Further, the alcohol is one or more of methanol, ethanol, ethylene glycol, glycerol, n-butanol or isopropyl alcohol;

[0018] Still further, the alcohol is n-butanol.

[0019] Further, the solvent B is one or more of trimethylbenzene, tetramethylbenzene, dimethyl sulfoxide and 120# solvent oil;

[0020] Still further, the solvent B is trimethylbenzene.

[0021] Further, the plant oil derivative product is one or more of methylated plant oil, methyl esterified plant oil or epoxidized plant oil; the methylated plant oil is methyl oleate; the methyl esterified plant oil is one or more of methyl esterified rapeseed oil, methyl esterified soybean oil and methyl esterified corn oil; and the epoxidized plant oil is one or more of epoxidized soybean oil, epoxidized rapeseed oil, epoxidized castor oil and epoxidized palm oil.

[0022] Further, the plant oil derivative product is a mixture of methylated plant oil and epoxidized plant oil, the methylated plant oil is selected from methyl oleate, and the epoxidized plant oil is selected from epoxidized soybean oil.

[0023] Further, the emulsifier is a mixture of calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether and hydroxyl polyethylene oxide block polyether.

[0024] Further, the mass ratio of calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether and hydroxyl polyethylene oxide block polyether in the emulsifier mixture is (2-4):(9-15):(2-5).

[0025] Further, the mass ratio of calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether and hydroxyl polyethylene oxide block polyether in the emulsifier mixture is 2:10:3.

[0026] The application further discloses a preparation method of the fluensulfamide and alloxydim emulsifiable concentrate, and the preparation method is characterized by comprising the following steps:

[0027] (1) dissolving the fluensulfamide in the solvent A and then salifying the fluensulfamide with an alkaline substance;

[0028] (2) fully mixing and dissolving the salified fluensulfamide with alcohol, the solvent B and the plant oil derivative product;

[0029] (3) adding the emulsifier into the mixture uniformly mixed in the step (2) and stirring and mixing, then adding the alloxydim, and finally mixing uniformly to obtain the required emulsifiable concentrate.

[0030] The application has the following advantages:

[0031] The fluensulfamide and alloxydim emulsifiable concentrate provided by the application solves the problems of crystallization and precipitation of the commercially available traditional fluensulfamide and alloxydim emulsifiable concentrate under low dilution, improves the stability of the effective components, and can be used for non-aircraft spraying field to control weeds, and enhances the absorption and spreading of the pesticide on weeds, and has a significant effect on the control of the soybean field weeds which have developed drug resistance. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the application more concise and clear, the application is described by the following specific embodiments, but the application is not limited to the embodiments. The embodiments described below are only better embodiments of the application, which can be used to describe the application, and cannot be understood as a limitation on the scope of the application. It should be noted that any modification, equivalent replacement and improvement made within the basis and principles of the application should be included in the protection scope of the application.

[0033] This invention does not impose any special restrictions on the source of any raw materials; they can be commercially available or self-made.

[0034] This invention provides an emulsifiable concentrate of flufenoxuron and tebufenozide, comprising the following components by weight percentage:

[0035] Table 1. Components and contents of flusulfanil and clopyralid emulsifiable concentrates

[0036]

[0037]

[0038] Formulation preparation example: Preparation example 1:

[0039]

[0040] Preparation Example 2:

[0041]

[0042] Preparation Example 3:

[0043]

[0044]

[0045] Preparation Example 4:

[0046]

[0047] Preparation Example 5:

[0048]

[0049] Preparation Example 6:

[0050]

[0051]

[0052] Preparation Example 7:

[0053]

[0054] Preparation Example 8:

[0055]

[0056] Preparation Example 9:

[0057]

[0058]

[0059] Preparation Example 10:

[0060]

[0061] Compare with Example 1:

[0062]

[0063] Compare with Example 2:

[0064]

[0065]

[0066] Compare with Example 3:

[0067]

[0068] Compare with Example 4:

[0069]

[0070] Compare with Example 5:

[0071]

[0072]

[0073] Compare with Example 6:

[0074]

[0075] Compare with Example 7:

[0076]

[0077] Compare with Example 8:

[0078]

[0079]

[0080] Preparation method:

[0081] (1) Flusulfanilamide is dissolved in solvent A and then reacted with an alkaline substance to form a salt;

[0082] (2) The salt-formed flusulfanil is thoroughly mixed and dissolved with alcohol and solvent B and vegetable oil derivatives;

[0083] (3) After adding emulsifier to the mixture in step (2) and stirring, add oxadiazine and mix thoroughly to obtain the desired emulsifiable oil.

[0084] Example 1: The main performance indicators of each processed fomesafen·sethoxydim emulsifiable concentrate were determined.

[0085] Product determination method:

[0086] 1. Determination of emulsion stability: Refer to the method for determining the emulsion stability of pesticides in GB / T 1603-2001.

[0087] In a beaker, add 100 mL, 50 mL, 25 mL, and 10 mL of standard hard water at 30°C ± 2°C respectively. Use a pipette to draw 0.5 mL of the sample and slowly add it to the hard water while stirring continuously (diluted 200x, 100x, 50x, 20x) to form an emulsion. Continue to stir at a speed of 2 - 3 r / s for 30 s, immediately transfer the emulsion to a clean and dry graduated cylinder, and place the graduated cylinder in a constant temperature water bath. At 30°C ± 2°C, let it stand for 1 h, take it out, and observe the separation of the emulsion. If there is no floating oil (paste), sinking oil, or precipitation in the graduated cylinder, it is determined that the emulsion stability is qualified.

[0088] 2. Low-temperature stability test: Refer to the method for determining the low-temperature stability of pesticides in GB / T 19137-2003.

[0089] 3. Heat storage stability test: Refer to the method for determining the heat storage stability of pesticides in GB / T 19136-2021.

[0090] The determination results of the main performance indicators of each processed fomesafen·sethoxydim emulsifiable concentrate are shown in Table 1.

[0091] Table 1 Determination results of the main performance indicators of each processed fomesafen·sethoxydim emulsifiable concentrate

[0092]

[0093] Continued Table 2 Determination results of the main performance indicators of each processed fomesafen·sethoxydim emulsifiable concentrate

[0094]

[0095]

[0096] Continued Table 3 Determination results of the main performance indicators of each processed fomesafen·sethoxydim emulsifiable concentrate

[0097]

[0098] As can be seen from the above tables (1 - 3), for the preparation examples of the fomesafen and sethoxydim emulsifiable concentrate of the present invention, appropriate auxiliary agent formulations are selected, the system is reasonable, the emulsion stability performance after dilution is good, and all performance indicators are qualified, and are better than the control examples.

[0099] Example 2: Surface tension determination of diluted flusulfanilamide·ambroxol emulsifiable concentrate solutions for each treatment.

[0100] Surface tension determination: Each formulation was diluted to the test solution according to the field application amount. The surface tension of the prepared and control solutions was measured using a full-range interfacial tension-contact angle meter. Each sample was measured three times and the average value was taken.

[0101] Table 4. Surface tension determination results of flumethrin·ambroxol EC diluted solutions for each treatment

[0102]

[0103]

[0104] As shown in the table above, the surface tension of the diluted herbicides in Examples 1-9 was significantly lower than that in the control example. For herbicides to fully exert their weed-controlling effect, it is essential to minimize the surface tension of the diluted herbicide solution, improve its spreading ability on weed leaves, increase sufficient retention on the leaf surface, and enhance the efficacy of the active ingredient. The comparison shows that the emulsifiable concentrate of this invention, in addition to significantly improving the stability of the product at low dilutions, significantly reduces the surface tension of the product through a specific combination of emulsifier ratios, thereby improving the spreading ability and retention of the diluted herbicide emulsifiable concentrate on weed stems and leaves, and ultimately enhancing the herbicide's weed-controlling effect.

[0105] Example 3: Field herbicidal efficacy test of flufenacet·ambroxol EC on soybean weeds in various treatments

[0106] Experimental crop: soybean (Suinong No. 4).

[0107] Experimental subjects: Soybean field weeds, including velvetleaf, barnyard grass, ragweed, sisal sedge, foxtail grass, thistle, crabgrass, purslane, lambsquarters, dayflower, iron amaranth, amaranth, knotweed, wild watermelon seedlings, cauliflower, pigweed, hop, sedge, knotweed, dandelion, etc.

[0108] Experimental location: Experimental field in Xianru Town, Dunhua City, Jilin Province. The soil was sandy loam with an organic matter content of about 2.5% and a pH of 6.8–7.0. The previous crop was corn. In spring, the soil was ridged with rows spaced 50 cm apart and sown manually. The seeding rate was 80 kg per hectare, and no tillage was performed.

[0109] Experimental Design: The experiment included 8 treatments, with water as a blank control and manual weeding as a control example. Each treatment was replicated 4 times. The plots were arranged in a randomized block design, with each plot consisting of 4 rows, 10m long, and covering an area of ​​20m². 2 .

[0110] Experimental method: After soybean sowing, soil spraying was carried out using a standard herbicide sprayer with different types and dosages of herbicides, using 375 L / hm² of water. 2The weather was cloudy and windless when the pesticide was applied. On the 10th day after application, after weeds emerged in the control area, the growth of crops and weeds in the field was visually assessed. On the 20th day after application, the number of weeds in each plot was surveyed, and their fresh weight was measured. A second weed survey was conducted before soybean flowering (40 days after application), and the fresh weight of the weeds was measured again. Soybean yield was determined at harvest.

[0111] During the survey, samples were taken at three points diagonally across each neighborhood, with each point measuring 0.25m. 2 Calculate the control efficacy based on the number of weeds and the control efficacy based on fresh weight.

[0112] The formula for calculating the effectiveness is as follows:

[0113] Control efficacy (%) = [Number of weeds in the control area (fresh weight) - Number of weeds in the treatment area (fresh weight)] / Number of weeds in the control area (fresh weight) × 100

[0114] The results of the field efficacy trials are shown in Tables 5 and 6.

[0115] Table 5. Results of field herbicidal efficacy test of flufenacet·ambroxol EC against soybean field weeds under different treatments.

[0116]

[0117]

[0118] As shown in Table 9, the treatments in Preparations 1-9 exhibited better herbicidal effects compared to Controls 4 and 8 (flumethrin·cletylene EC). Flumethrin·cletylene EC showed significantly better control of monocotyledonous weeds than dicotyledonous weeds. 20 days after application, the control efficacy of Flumethrin·cletylene EC in Preparations 1-9 against monocotyledonous weeds was 82-94% per plant and 85%-93% per fresh weight; against dicotyledonous weeds, the control efficacy was 82%-89% per plant and 83%-91% per fresh weight. 40 days after application, the control efficacy of Flumethrin·cletylene EC in Preparations 1-9 against monocotyledonous weeds was 81%-92% per plant and 83%-90% per fresh weight; against dicotyledonous weeds, the control efficacy was 78%-86% per plant and 81%-89% per fresh weight. Compared with the control, the preparation examples 1-9 showed a significant improvement in efficacy against both dicotyledonous and monocotyledonous weeds.

[0119] Table 6. Effects of different treatments on soybean yield of flumethrin-ammonium emulsifiable concentrate.

[0120] Treatment Dilution rate Yield (kg / ha) Increase rate (%) Preparation Example 1 200X 2981 30.75 Preparation Example 2 200X 2854 25.18 Preparation Example 3 200X 2819 23.64 Preparation Example 4 200X 2835 24.34 Preparation Example 5 200X 2794 22.54 Preparation Example 6 200X 2695 18.20 Preparation Example 7 200X 2654 16.40 Preparation Example 8 200X 2758 20.96 Preparation Example 9 200X 2716 19.12 Control Example 4 200X 2396 5.09 Control Example 8 200X 2489 9.17 Hand weeding / 2280 /

[0121] The flusulfanil·ammoniazide EC prepared by this invention did not cause any phytotoxicity to soybeans during the entire test process. Soybeans in all test treatments were normal, and no obvious phytotoxic symptoms appeared during the growth period. Furthermore, the EC of this invention can effectively control weeds in the field while increasing soybean yield.

[0122] Example 4: Experiment on aerial application of flufenacet·ammoniazide EC for weed control in soybean fields under various treatments

[0123] Experimental crop: soybean (Xiangfeng No. 2).

[0124] Experimental subject: soybean field weeds.

[0125] Experimental site: Soybean planting area in Kongnali Village, Dalukou Township, Liangshan County, Jining City, Shandong Province. The soil fertility in the experimental area is moderate to high, which is in line with local scientific agricultural practices.

[0126] Test reagents and dilution ratios:

[0127]

[0128]

[0129] Experimental setup: The experiment adopted a large-area test, arranged sequentially, with a large area of ​​667m². 2 Each treatment was repeated 4 times.

[0130] Experimental Methods: The experiment was conducted on June 30, 2021. An MG-1 agricultural drone was used to apply pesticides to the soybean field. Each pesticide was diluted 30 times with water before application. During the dilution process, control examples 4 and 8 showed precipitation and were unsuitable for aerial spraying. Therefore, only preparations 1-4 were used for aerial spraying. After each treatment, the spray tank was cleaned, the hoses were rinsed with water for 2 minutes, and then rinsed with pesticide for 30 seconds to ensure the drone spraying system was free from interference from other pesticides.

[0131] Survey methods: Weeds were surveyed before pesticide application and again 15 days after application. Random sampling was used to survey 5 points diagonally across the area, with each point covering 1 meter. 2 The number and fresh weight of weeds are used to calculate the control effect.

[0132] Control efficacy (%) = [Number of weeds in the control area (fresh weight) - Number of weeds in the treatment area (fresh weight)] / Number of weeds in the control area (fresh weight) × 100

[0133] After applying the pesticide, observe the soybeans carefully to see if they are affected. The symptoms of pesticide damage to the crop (seedling death, growth inhibition, chlorosis, deformity, contact irritation, leaf wilting, death of growing point, etc.) should be accurately described.

[0134] Results of field aerial spraying efficacy trials:

[0135] Table 7. Control efficacy of aerial spraying of flumethrin-ammonium oxychloride EC for each treatment.

[0136]

[0137] The above field aerial spraying efficacy test results show that the emulsifiable concentrate of the present invention still has good dilution stability at low dilution ratios, and does not exhibit crystallization or precipitation. It can be applied to aerial spraying operations, meeting the needs of agricultural development. No phytotoxicity symptoms were observed in soybeans during the experiment.

[0138] Based on the above experiments, it is shown that the emulsifiable concentrate containing flumethrin and tebufenozide of the present invention has good stability in low-dilution solutions. The combination of specific emulsifiers and block polyether adjuvants effectively improves the spreading ability and retention of the solution on weeds, giving the product a better weeding effect and no phytotoxicity to crops. It can be widely used in aerial spraying operations.

[0139] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. Any changes or modifications made in accordance with the essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An emulsifiable concentrate containing flusulfanilamide and tebufenozide, characterized in that, The emulsifiable concentrate is composed of the following components by weight percentage: flusulfanil 12.5-15%, tebufenozide 8.3-17%, solvent A 11-25%, alkaline substance 2-5%, alcohol 3-7%, vegetable oil derivatives 13-19%, emulsifier 13-24%, and solvent B to make up the balance. Solvent A is one or more of N,N-dimethylformamide, cyclohexanone, acetophenone, or propylene carbonate; The alkaline substance is one or more of ethanolamine, triethanolamine, potassium hydroxide, sodium hydroxide, or triethylamine; The alcohol is one or more of methanol, ethanol, ethylene glycol, glycerol, n-butanol or isopropanol; Solvent B is one or more of trimethylbenzene, tetramethylbenzene, dimethyl sulfoxide, and 120# solvent oil; The vegetable oil derivatives are one or more of methylated vegetable oil, methylated vegetable oil, or epoxidized vegetable oil; The emulsifier is a mixture of calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether, and hydroxyl polyoxyethylene block polyether, wherein the mass ratio of calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether, and hydroxyl polyoxyethylene block polyether is (2-4):(9-15):(2-5).

2. The emulsifiable concentrate according to claim 1, characterized in that, The emulsifiable concentrate is composed of the following components by weight percentage: flusulfanil 12.5-15%, tebufenozide 8.3-17%, solvent A 17-25%, alkaline substance 3-5%, alcohol 3-5%, vegetable oil derivative 13-15%, emulsifier 18-24%, and solvent B to make up the balance. The mass ratio of flusulfanil to tebufenozide is 12.5:8.

3.

3. The emulsifiable concentrate according to claim 1, characterized in that, The emulsifiable concentrate contains 12.5% ​​flufenoxuron by weight and 8.3% tebufenozide by weight.

4. The emulsifiable concentrate according to claim 1, characterized in that, Solvent A is a mixture of propylene carbonate and N,N-dimethylformamide.

5. The emulsifiable concentrate according to claim 1, characterized in that, The alkaline substance mentioned is triethanolamine.

6. The emulsifiable concentrate according to claim 1, characterized in that, The alcohol mentioned is n-butanol.

7. The emulsifiable concentrate according to claim 1, characterized in that, The solvent B is trimethylbenzene.

8. The emulsifiable concentrate according to claim 1, characterized in that, The methylated vegetable oil is methyl oleate; the methylated vegetable oil is selected from one or more of methylated rapeseed oil, methylated soybean oil, and methylated corn oil; the epoxidized vegetable oil is one or more of epoxidized soybean oil, epoxidized rapeseed oil, epoxidized castor oil, or epoxidized palm oil.

9. The emulsifiable concentrate according to claim 8, characterized in that, The vegetable oil derivative is a mixture of methylated vegetable oil and epoxidized vegetable oil, wherein the methylated vegetable oil is selected from methyl oleate and the epoxidized vegetable oil is selected from epoxidized soybean oil.

10. The emulsifiable concentrate according to claim 1, characterized in that, The mass ratio of calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether, and hydroxyl polyoxyethylene block polyether in the emulsifier mixture is 2:10:

3.

11. The method for preparing the emulsifiable concentrate according to any one of claims 1-10, characterized in that, The preparation method is as follows: (1) Flusulfanilamide is dissolved in solvent A and then reacted with an alkaline substance to form a salt; (2) Thoroughly mix and dissolve the salt-formed flusulfanil with alcohol and solvent B and the vegetable oil derivative; (3) After adding emulsifier to the mixture in step (2) and stirring, add oxadiazine and mix thoroughly to obtain the desired emulsifiable oil.

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