A herbicidal composition, a method for preparing the same and a method for applying the same

Abstract

The application belongs to the field of pesticides, and particularly relates to a herbicidal composition containing dithiopyr and a preparation and application method thereof. The herbicidal composition comprises dithiopyr, an organic acid ester, a ketone solvent and a non-ionic emulsifier. The herbicidal composition provided by the application has low volatilization rate, no low-temperature separation phenomenon, and effectively improves the dispersion stability and efficacy. In addition, the preparation method of the composition provided by the application is simple and efficient, easy to operate, and easy to realize large-scale production.

Description

Technical Field

[0001] This invention belongs to the field of pesticides and relates to a herbicidal composition, specifically a herbicidal composition containing thiophanate-methyl and its preparation and application methods. Background Technology

[0002] Dithiopyr, chemical name: S,S′-dimethyl-2-difluoromethyl-4-isobutyl-6-trifluoromethylpyridine-3,5-dithiocarboxylate, CAS number: 97886-45-8, is a pyridinecarboxylic acid herbicide used to control weeds in crops and lawns. This herbicide is mainly absorbed through stems, leaves, and roots, inhibiting cell division by disrupting the formation of microtubules in the spindle fibers of susceptible weeds. It has good control efficacy against weeds such as barnyard grass, duckweed, sedge, and knotweed. The physicochemical stability of dithiopyr is affected by the environment, exhibiting significant differences in volatility and stability under different soil, humidity, and temperature conditions. Especially under dry and high-temperature conditions, the volatilization and decomposition of dithiopyr cause air and soil pollution, also affecting the product's efficacy. Currently, there are reports on reducing the volatility of dithiopyr by encapsulation, but due to the complexity of preparation, poor speed of action, and other reasons, it has not yet been widely commercialized. Fluthionate has a melting point of 65°C, and its main formulation type is liquid. It is prone to crystallization at low temperatures, affecting the product's usability and uniformity. Therefore, this invention is proposed. Summary of the Invention

[0003] One of the objectives of this invention is to provide a herbicidal composition containing fluthion to improve the technical problems of high volatility, poor dispersion stability, and low-temperature precipitation of existing fluthion liquid formulations.

[0004] A second objective of this invention is to provide a method for preparing the above-mentioned herbicidal composition.

[0005] A third objective of this invention is to provide a method for applying the above-mentioned herbicidal composition.

[0006] In accordance with the above-mentioned objective, the present invention provides the following implementation scheme:

[0007] A herbicidal composition containing flufenoxuron, comprising the following components:

[0008] a) Fluthion;

[0009] b) Organic acid esters;

[0010] c) Ketone solvents; and

[0011] d) Nonionic emulsifiers.

[0012] Preferably, the organic acid ester is an organic carboxylic acid ester;

[0013] Preferably, the organic carboxylic acid ester is selected from at least one of aromatic carboxylic acid esters and aliphatic carboxylic acid esters;

[0014] Preferably, the aromatic carboxylic acid ester is selected from at least one of the following: C1-C4 alkyl benzoate, methyl o-hydroxybenzoate, methyl phenylacetate, methyl m-methylbenzoate, ethyl p-methylbenzoate, methyl salicylate, and ethyl salicylate.

[0015] Preferably, the aliphatic carboxylic acid ester is selected from at least one of methyl oleate, methyl laurate, ethyl laurate, methyl soybean oil, methyl decanoate, and ethyl octanoate.

[0016] Preferably, the ketone solvent is selected from at least one of N-C1-C8 alkylpyrrolidone, 4-methyl-1,3-dioxolane-2-one, cyclohexanone, acetophenone, isoflurone, etc.

[0017] Preferably, the nonionic emulsifier contains at least one of a polyoxyethylene structure, a polyoxypropylene structure, or a polyoxyethylene-polyoxypropylene structure; more preferably, the nonionic emulsifier is selected from at least one of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol polyoxyethylene ether, alkylphenol polyoxypropylene ether, castor oil polyoxyethylene ether, castor oil polyoxypropylene ether, alkyl alcohol polyoxyethylene-polyoxypropylene copolymer, alcohol alkoxy compounds, polyoxyethylene ether sulfate, and polyoxyethylene ether phosphate.

[0018] Preferably, the herbicidal composition further contains other components, including at least one of other solvents, surfactants, fillers, safeners, and other herbicides.

[0019] Preferably, the herbicidal composition contains 0.5-40% by mass of fluthionyl chloride, more preferably 5-30%, and even more preferably 15-25%.

[0020] Preferably, the herbicidal composition contains 10-50% organic acid esters by mass, more preferably 20-40%;

[0021] Preferably, the ketone solvent in the herbicidal composition is 5-50% by mass, more preferably 10-30%;

[0022] Preferably, the nonionic emulsifier in the herbicidal composition has a mass percentage of 10-50%, more preferably 15-45%, and even more preferably 15-35%.

[0023] Preferably, the other components in the herbicidal composition have a mass percentage of 0-74.5%.

[0024] Preferably, the herbicidal composition is formulated as any one of emulsifiable concentrate (EC), oil dispersant (OD), dispersible liquid (DC), suspension concentrate (SC), suspension emulsion (SE), microemulsion (ME), and emulsion-water mixture (EW).

[0025] Furthermore, the present invention provides a method for preparing the above-mentioned herbicidal composition, comprising the following steps: mixing fluthionine, organic acid esters, ketone solvents, nonionic emulsifiers and optional other components, and mixing them evenly by stirring, grinding or shearing emulsification to obtain the herbicide composition.

[0026] Furthermore, the present invention provides a method for applying the above-mentioned herbicidal composition, comprising the following steps: diluting the above-mentioned herbicidal composition in water to form a sprayable solution; and applying the sprayable solution to weeds or their location.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the herbicidal composition provided by this invention, organic acid esters, ketone solvents and nonionic emulsifiers have a significant stabilizing effect on fluthioridin, which not only reduces the high-temperature volatility of fluthioridin products, but also improves the dispersion stability of the products and improves the problem of low-temperature precipitation and crystallization of fluthioridin.

[0029] The preparation method of the herbicidal composition provided by the present invention is simple, easy to operate, easy to scale up, and the product is easy to apply. Attached Figure Description

[0030] Figure 1 Figure 1 shows the results of the volatility test of Examples 1-7 and Comparative Examples 1-7.

[0031] Figure 2 Comparison of appearance of the volatility test 2 of Examples 5 and 6 and Comparative Examples 5 and 6.

[0032] Figure 3 Graph showing the volatility results of volatility test 2 for Examples 5 and 6 and Comparative Examples 5 and 6.

[0033] Figure 4 Comparison of low-temperature stability and dilution stability between Example 6 and Comparative Example 6. Detailed Implementation

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0035] A first aspect of the present invention provides a herbicidal composition comprising the following components:

[0036] a) Fluthion;

[0037] b) Organic acid esters;

[0038] c) Ketone solvents; and

[0039] d) Nonionic emulsifiers.

[0040] In the herbicidal composition provided by this invention, organic acid esters, ketone solvents and nonionic emulsifiers have a significant stabilizing effect on fluthioridin, which not only reduces the high-temperature volatility of fluthioridin products, but also improves the dispersion stability of the products and improves the problem of low-temperature precipitation and crystallization of fluthioridin.

[0041] In some preferred embodiments, the organic ester is an organic carboxylic acid ester, and preferably, the organic carboxylic acid ester is selected from at least one of aromatic carboxylic acid esters and aliphatic carboxylic acid esters;

[0042] Typical, but not limiting, aromatic carboxylic acid esters include: benzoic acid esters, salicylic acid esters, phenyl acrylate esters, caffeic acid esters, phenylacetic acid esters, naphthaleneacetic acid esters, etc.

[0043] Aliphatic carboxylic acid esters, such as: oleate esters, acrylate esters, oxalate esters, decanoate esters, stearate esters, adipate esters, lauryl esters, etc.;

[0044] More preferably, the aromatic carboxylic acid ester is selected from at least one of C1-C4 alkyl benzoate and methyl salicylate, and the aliphatic carboxylic acid ester is methyl oleate.

[0045] In some preferred embodiments, the ketone solvent is selected from at least one of N-C1-C8 alkylpyrrolidone or 4-methyl-1,3-dioxolane-2-one.

[0046] In some preferred embodiments, the nonionic emulsifier is selected from at least one of the following: a polyoxyethylene structure, a polyoxypropylene structure, or a polyoxyethylene-polyoxypropylene structure. Typically, but not limitingly, the nonionic emulsifier is selected from at least one of the following: fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol polyoxyethylene ether, alkylphenol polyoxypropylene ether, castor oil polyoxyethylene ether, castor oil polyoxypropylene ether, alkyl alcohol polyoxyethylene-polyoxypropylene copolymer, alcohol alkoxy compounds, polyoxyethylene ether sulfate, or polyoxyethylene ether phosphate.

[0047] In some preferred embodiments, the weed-control composition further comprises other components, including at least one of other solvents, surfactants, fillers, safeners, and other herbicides.

[0048] Typically, but not limitingly, the other solvents are selected from at least one of aromatic hydrocarbons, vegetable oils, vegetable oil esters, carbonates, and paraffin oils;

[0049] Typically, but not limitingly, the surfactant is selected from at least one of carboxylates, sulfonates, sulfates, sulfate esters, phosphates, phosphate esters, fatty alcohol polyoxyethylene ethers, fatty acid polyoxyethylene esters, alkylphenol polyoxyethylene ethers, castor oil polyoxyethylene ethers, ethylene oxide-propylene oxide copolymers, alcohol alkoxy compounds, and alkyl acrylates. The addition of a surfactant to the herbicidal composition facilitates its dispersion in water to form a sprayable solution for application.

[0050] Typically, but not limitingly, the filler is selected from at least one of clay, silica, magnesia, kaolin, diatomaceous earth, starch, and calcium carbonate.

[0051] Typically, but not limitingly, the safener is selected from at least one of quinoline, cypermethrin, cypermethrin, pyrazole cypermethrin, dibenzoxazole acid, and their acids, salts, or derivatives.

[0052] In this invention, "other herbicides" refers to herbicides other than flufenoxuron. Typically, but not limitingly, the other herbicides are selected from at least one of sulfonylurea herbicides, acetanilide herbicides, arylcarboxylic acid herbicides, pyridone herbicides, tripyrimidine herbicides, cyclohexanedione oxime herbicides, triazolinone herbicides, and phthalimide herbicides.

[0053] In some preferred embodiments, when the mass percentage of fluthionyl chloride in the herbicidal composition is 0.5-40%, the herbicidal composition exhibits excellent chemical stability; more preferably, it is 5-30%, and even more preferably, it is 15-25%.

[0054] In some preferred embodiments, the mass percentage of fluoxetine in the herbicidal composition may be selected from, but is not limited to, the following proportions: 0.5%, 1%, 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%.

[0055] In some preferred technical solutions, when the mass percentage of organic acid esters in the herbicidal composition is 10-50% and the mass percentage of ketone solvents is 5-50%, the volatility of fluthiamethoxam can be effectively reduced. More preferably, when the mass percentage of organic acid esters is 20-40% and the mass percentage of ketone solvents is 10-30%, the stability of the obtained fluthiamethoxam herbicidal composition is more significant.

[0056] In some preferred embodiments, the mass percentage of organic esters in the herbicidal composition may be selected from, but is not limited to, the following proportions: 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%.

[0057] In some preferred embodiments, the mass percentage of ketone solvents in the herbicidal composition may be selected from, but is not limited to, the following proportions: 10%, 14.5%, 15%, 16%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%.

[0058] In some preferred embodiments, the mass percentage of the nonionic emulsifier in the herbicidal composition may be selected from, but is not limited to, the proportions of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%.

[0059] In some preferred embodiments, the herbicidal composition is formulated as any one of emulsifiable concentrate (EC), oil dispersant (OD), dispersible liquid (DC), suspension concentrate (SC), suspension emulsion (SE), microemulsion (ME), and emulsion-water mixture (EW).

[0060] According to a second aspect of the present invention, the present invention provides a method for preparing a herbicidal composition, comprising the following steps: mixing fluthionine, organic acid esters, ketone solvents, nonionic emulsifiers and optionally other solvents, surfactants, fillers, safeners or other herbicides, and mixing them uniformly by stirring, milling or shearing emulsification to obtain a herbicidal composition.

[0061] The preparation method of the herbicidal composition provided by the present invention is simple, easy to operate, easy to scale up, and the product is easy to apply.

[0062] According to a third aspect of the present invention, the present invention provides a method for applying the above-described weed-control composition, comprising the following steps: diluting the above-described weed-control composition with water to form a sprayable solution, and applying the sprayable solution to the weeds or their location.

[0063] To facilitate understanding of the technical solution by those skilled in the art, the technical solution provided by the present invention will be further described below with reference to embodiments and comparative examples. All contents in the embodiments and comparative examples are mass percentages.

[0064] The specifications and sources of raw materials used in the examples and comparative examples are shown in Table 1 below. Raw materials not listed in Table 1 were all purchased commercially.

[0065] Table 1

[0066]

[0067] Example 1

[0068] This embodiment provides a liquid herbicidal formulation, the components of which are as follows by mass percentage: flusulfanilamide 0.5%, butyl benzoate 50%, N-methylpyrrolidone 14.5%, Emulsogen TS160 30%, and calcium dodecylbenzenesulfonate 5%.

[0069] Example 2

[0070] This embodiment provides a liquid herbicide formulation, the components of which are as follows by mass percentage: flusulfanilamide 10%, methyl oleate 10%, N-octylpyrrolidone 50%, Emulsogen EL 360 20%, ETHYLAN NS-500LQ 10%.

[0071] Example 3

[0072] This embodiment provides a liquid herbicidal formulation, the components of which are as follows by mass percentage: flusulfanilamide 15%, methyl benzoate 30%, N-octylpyrrolidone 10%, Emulsogen TS160 25%, Atlas G5000 10%, Genapol X 060 10%.

[0073] Example 4

[0074] This embodiment provides a liquid herbicide formulation, the components of which are as follows by mass percentage: flusulfanilamide 24%, methyl salicylate 30%, N-ethylpyrrolidone 16%, Emulsogen TS160 15%, Atlas G5000 10%, and calcium dodecylbenzenesulfonate 5%.

[0075] Example 5

[0076] This embodiment provides a liquid herbicidal formulation, the components of which are as follows by mass percentage: fluthion 24%, methyl salicylate 40%, 4-methyl-1,3-dioxolane-2-one 16%, Synperonic 13 / 12 16%, and calcium dodecylbenzenesulfonate 4%.

[0077] Example 6

[0078] This embodiment provides a liquid herbicidal formulation, the components of which, by mass percentage, are as follows: flufenoxuron 24%, methyl benzoate 30%, N-octylpyrrolidone 16%, Emulsogen TS160 10%, Genapor X 080 15%, and calcium dodecylbenzenesulfonate 5%.

[0079] Example 7

[0080] This embodiment provides a liquid herbicidal formulation, the components of which are as follows by mass percentage: flusulfanilamide 40%, methyl benzoate 30%, N-butylpyrrolidone 15%, Emulsogen TS160 6%, Atlas G5000 4%, and calcium dodecylbenzenesulfonate 5%.

[0081] The herbicidal liquid formulations provided in Examples 1-7 above were prepared according to the following steps: fluthionine, organic acid esters, ketone solvents and emulsifiers were mixed and stirred evenly at 50°C according to the composition ratio, and then cooled to room temperature to obtain the herbicidal liquid formulations.

[0082] Comparative Example 1

[0083] This comparative example provides a liquid herbicidal formulation that differs from Example 1 in that EmulsogenTS160 is replaced with water, while the other ingredients and their contents are the same as in Example 1.

[0084] Comparative Example 2

[0085] This comparative example provides a liquid herbicidal formulation that differs from Example 2 in that N-octylpyrrolidone is replaced with Solvesso 150 (aromatic hydrocarbon), while the other raw materials and contents are the same as in Example 2.

[0086] Comparative Example 3

[0087] This comparative example provides a liquid herbicidal formulation that differs from Example 3 in that methyl benzoate is replaced with ARMID DM10 (alkylamide), while the other raw materials and contents are the same as in Example 3.

[0088] Comparative Example 4

[0089] This comparative example provides a liquid herbicidal formulation that differs from Example 4 in that methyl salicylate is replaced with tetrahydrofurfuryl alcohol, while the other raw materials and contents are the same as in Example 4.

[0090] Comparative Example 5

[0091] This comparative example provides a liquid herbicidal formulation that differs from Example 5 in that 4-methyl-1,3-dioxolane-2-one is replaced with ARMID DM10 (alkylamide), while the other raw materials and contents are the same as in Example 5.

[0092] Comparative Example 6

[0093] This comparative example provides a liquid herbicide formulation, which is DOW's commercially available product "Dimension 2EW" fluthionazole formulation, containing 24 wt% fluthionazole.

[0094] Comparative Example 7

[0095] This comparative example provides a liquid herbicide formulation, the components of which are as follows by mass percentage: flufenoxuron 24% and cyclohexanone 76%.

[0096] The herbicidal liquid formulations provided in Comparative Examples 1-5 and Comparative Example 7 were prepared according to the following steps: fluthionine, organic acid esters, solvents and emulsifiers were mixed and stirred evenly at 50°C according to the composition ratio, and then cooled to room temperature to obtain the herbicidal liquid formulation.

[0097] Volatility Test 1

[0098] Samples from Examples 1-7 and Comparative Examples 1-7 were pipetted onto the surface of each glass slide, with a total of 50 mg of fluthiazide active ingredient added to each slide. Each sample was tested in quadruplicate. The slides were placed uncovered in a 60°C forced-air drying oven, and samples were collected at 0, 6, 12, and 24 hours of evaporation to determine the remaining fluthiazide content on the slides. The test results are attached. Figure 1 As shown.

[0099] Volatility Test 2

[0100] Samples from Examples 5 and 6, as well as Comparative Examples 5 and 6, were pipetted onto the surface of each glass slide, with a total of 50 mg of fluthiazide active ingredient added to each slide. Each sample was tested in four replicates. The slides were placed in an open, well-ventilated greenhouse. During the experiment, the average daily minimum temperature was 28.5°C, the average daily maximum temperature was 34.3°C, and the average humidity was 82%. Slide samples were collected on days 0, 7, 14, and 28 after volatilization at room temperature. The remaining fluthiazide content on the slides was measured, and the volatilization rate was calculated using the following formula.

[0101]

[0102] The test results are attached. Figure 2 and attached Figure 3 As shown, Figure 2 The images show a comparison of the appearance of the glass slide samples from each embodiment and comparative example after being placed at room temperature for 14 days. It can be seen that the samples of comparative examples 5 and 6 precipitated white crystals, while the samples of examples 5 and 6 remained in the droplet state. Figure 3 The graph shows the evaporation rate results for each embodiment and comparative example.

[0103] Stability test

[0104] The stability of the formulations provided in the examples and comparative examples was analyzed under different conditions. After storage at 0°C and -16°C for 7 days, the appearance of these liquid formulations was observed. At a controlled temperature of 10°C, these formulations were diluted to 1% solutions, and the appearance and dispersion stability of the diluted solutions were observed after 24 hours. The results are shown in Table 2 below. The low-temperature stability and dilution stability of Example 6 and Comparative Example 6 are attached. Figure 4 As shown, Example 6 is a homogeneous liquid with no crystallization under low-temperature storage and dilution; Comparative Example 6, after low-temperature storage, has large white crystals precipitated at the bottom, and after dilution with water at 10°C, the dispersion is uneven, with a large number of needle-like crystal solids suspended at the bottom, presenting a turbid state.

[0105] Table 2

[0106] Store at 0℃ for 7 days Store at -16℃ for 7 days Stability of 1% dilution (10℃) Example 1 transparent liquid homogeneous liquid No precipitation Example 2 transparent liquid homogeneous liquid No precipitation Example 3 transparent liquid homogeneous liquid No precipitation Example 4 transparent liquid homogeneous liquid No precipitation Example 5 transparent liquid homogeneous liquid No precipitation Example 6 transparent liquid homogeneous liquid No precipitation Example 7 transparent liquid Turbid liquid No precipitation Comparative Example 1 transparent liquid transparent liquid Precipitation of crystals Comparative Example 2 transparent liquid Turbid liquid Precipitation of crystals Comparative Example 3 transparent liquid Turbid liquid No precipitation Comparative Example 4 turbid Precipitation crystals Precipitation of crystals Comparative Example 5 transparent liquid Turbid liquid No precipitation Comparative Example 6 turbid Precipitation crystals Precipitation of crystals Comparative Example 7 transparent liquid Precipitation crystals Precipitation of crystals

[0107] Life test

[0108] To determine the herbicidal activity of the liquid formulations provided in Examples 3-6 and Comparative Examples 3-6 of this invention, the following tests were conducted. The test results are shown in Table 3 below.

[0109] The specific steps of the experiment are as follows:

[0110] A greenhouse pot experiment was conducted. The experimental soil was a mixture of laboratory clay and seedling substrate at a volume ratio of 1:2. Pots with a diameter of 6.5 cm and a depth of 5.5 cm were filled with soil to 3 / 4 of their height. After watering and ensuring the soil was completely moist, an equal amount of the tested weed seeds (barnyardgrass) were sown into the pots. After sowing, the soil was covered with approximately 0.2 cm of soil, and water was added from the bottom until the soil was saturated. The pots were then placed in a greenhouse for cultivation, maintaining soil moisture, a temperature of 20℃–30℃, and an air humidity above 60%. Ventilation was maintained. Soil spraying was performed 24 hours after sowing. The pesticide was prepared according to the designed dosage and sprayed using a portable sprayer (HCL-2000). Each weed was treated four times, with a spray height of 50 cm, a spray pressure of 0.2 MPa, and a water flow rate of 600 L / ha. The application doses of flufenoxuron liquid formulation samples were 108 g ai / ha and 144 g ai / ha, respectively. The overall growth inhibition rate was assessed visually 14 days after application, and the fresh weight of the aboveground parts of each treatment was measured 28 days after application. The fresh weight inhibition rate was calculated using the formula.

[0111]

[0112] Table 3

[0113]

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A herbicidal composition comprising dithio-oxamid, characterized in that, The herbicide composition contains a) Fluthion, wherein the content of fluthion in the herbicidal composition is 0.5-40% by mass; b) An organic carboxylic acid ester, wherein the organic carboxylic acid ester is selected from at least one of aromatic carboxylic acid esters and aliphatic carboxylic acid esters, wherein the aromatic carboxylic acid ester is selected from at least one of C1-C4 alkyl benzoate or methyl salicylate, and the aliphatic carboxylic acid ester is methyl oleate. c) Ketone solvents, wherein the ketone solvents are selected from at least one of N-C1-C8 alkylpyrrolidone or 4-methyl-1,3-dioxolane-2-one; and d) A nonionic emulsifier containing a polyoxyethylene structure, a polyoxypropylene structure, or a polyoxyethylene-polyoxypropylene structure.

2. The herbicidal composition according to claim 1, characterized by The volatilization rate of flufenoxuron in this herbicide composition is less than 30% after volatilization at 60°C for 24 hours.

3. The herbicidal composition according to claim 1, characterized by The nonionic emulsifier is selected from at least one of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol polyoxyethylene ether, alkylphenol polyoxypropylene ether, castor oil polyoxyethylene ether, castor oil polyoxypropylene ether, alkyl alcohol polyoxyethylene polyoxypropylene copolymer, alcohol alkoxy compound, polyoxyethylene ether sulfate, or polyoxyethylene ether phosphate.

4. The herbicidal composition according to claim 1, characterized in that, The herbicidal composition further contains other ingredients, including at least one of other solvents, surfactants, fillers, safeners, and other herbicides.

5. The herbicidal composition according to claim 4, characterized in that, The surfactant is selected from at least one of carboxylates, sulfonates, sulfates, sulfate esters, phosphates, phosphate esters, fatty alcohol polyoxyethylene ethers, fatty acid polyoxyethylene esters, alkylphenol polyoxyethylene ethers, castor oil polyoxyethylene ethers, ethylene oxide-propylene oxide copolymers, alcohol alkoxy compounds, and alkyl acrylates.

6. The herbicidal composition according to claim 5, characterized in that, The surfactant is a sulfonate.

7. The herbicidal composition according to claim 1, characterized in that, By weight percentage, the herbicidal composition contains 10-50% organic carboxylic acid esters, 5-50% ketone solvents, and 10-50% nonionic emulsifiers.

8. The herbicidal composition according to claim 7, characterized in that, The herbicidal composition contains, by weight percentage, 5-30% fluthionine, 20-40% organic carboxylic acid esters, 10-30% ketone solvents, and 15-45% nonionic emulsifiers.

9. The herbicidal composition according to claim 8, characterized in that, The herbicidal composition contains 15-25% flufenoxuronide by weight percentage.

10. The herbicidal composition according to claim 7, characterized in that, The mass percentage of flufenoxuron in the herbicidal composition is selected from at least one of 0.5%, 1%, 2%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%; the mass percentage of organic carboxylic acid esters in the herbicidal composition is selected from at least one of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%; the mass percentage of ketone solvents in the herbicidal composition is selected from at least one of 10%, 14.5%, 15%, 16%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%; and the mass percentage of nonionic emulsifiers in the herbicidal composition is selected from at least one of 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, and 50%.

11. The herbicidal composition according to any one of claims 1-10, characterized in that, The herbicidal composition is formulated as any one of emulsifiable concentrate, oil dispersant, dispersible liquid, suspension concentrate, suspension emulsion, microemulsion, or water emulsion.

12. The method for preparing the herbicidal composition according to claim 1, characterized in that, The process includes the following steps: mixing fluthion, organic carboxylic acid esters, ketone solvents, and nonionic emulsifiers, and mixing them evenly by stirring, milling, or shearing emulsification to obtain a herbicidal composition.

13. The method for preparing the herbicidal composition according to claim 4, characterized in that, The process includes the following steps: mixing fluthion, organic carboxylic acid esters, ketone solvents, nonionic emulsifiers and other ingredients, and mixing them evenly by stirring, grinding or shearing emulsification to obtain a herbicidal composition.

14. A method of applying the herbicidal composition according to any one of claims 1-10, characterized in that, The method includes the following steps: diluting the herbicidal composition according to any one of claims 1-10 into water to form a sprayable solution, and applying the sprayable solution to the weeds or their location.

15. A method for reducing the volatility of flusulfanilamide, characterized in that, The method includes the step of mixing and contacting the fluthion with an effective amount of an organic carboxylic acid ester, a ketone solvent, and a nonionic emulsifier; The fluthiocyanate, organic carboxylic acid esters, ketone solvents, and nonionic emulsifiers described herein are as described in claim 1.

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