Multi-element compound herbicide composition for wheat field and preparation method of multi-element compound herbicide composition

Abstract

The invention provides a wheat field multi-element compound herbicide composition and a preparation method thereof, the wheat field multi-element compound herbicide composition is prepared by compounding tribenuron-methyl, iodosulfuron-methyl sodium salt, florasulam and mefenpyr-diethyl to prepare water dispersible granules, the control effect is good, the physical and chemical properties are stable, the wheat field multi-element compound herbicide composition is not easy to decompose and deteriorate, and the wheat field multi-element compound herbicide composition has a broad application prospect. The suspension rate reaches 96% or above; in the use process, the water dispersible granule only needs to be dispersed once, the use process is simple, and the water dispersible granule is a granular solid, is good in flowability, does not stick to the wall after being poured, and does not remain in a packaging container to form secondary pollution.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pesticide herbicides, and particularly relates to a wheat field herbicide composition and a preparation method thereof BACKGROUND

[0002] Through in-depth investigation of weeds in major wheat-producing areas, we found that the resistance of weeds such as resistant Descurainia sophia, resistant Brassica rapa and evil Galium aparine is gradually increasing. For a long time, farmers have been using conventional herbicides such as bensulfuron-methyl (containing bensulfuron-methyl and bensulfuron-methyl), but these weeds have developed strong resistance to these drugs and are difficult to eradicate.

[0003] As a broad-spectrum herbicide, florasulam is mainly used for the prevention and control of broadleaf weeds in wheat fields. It has excellent effect on difficult-to-control weeds such as Rubiaceae, Caryophyllaceae, Convolvulaceae, Malvaceae and Polygonaceae, and can also effectively inhibit the growth of Euphorbia (Euphorbiaceae) which is difficult to eradicate in wheat fields. As a broad-spectrum herbicide, florasulam has shown significant advantages in the prevention and control of broadleaf weeds in wheat fields. It not only effectively deals with difficult-to-control weeds such as Rubiaceae, Caryophyllaceae, Convolvulaceae, Malvaceae and Polygonaceae, but also strongly inhibits the growth of Euphorbia (Euphorbiaceae) which is difficult to eradicate in wheat fields. This feature makes florasulam an important choice for wheat field weed control. Florasulam still maintains stable efficacy under low temperature conditions, and even at 2℃, it can ensure the safety of wheat. It can be used in combination with many herbicide varieties, and the effects are superimposed, further enhancing its herbicidal effect. The metabolic speed of wheat on florasulam is much faster than that of weeds, which ensures the high safety of florasulam to wheat.

[0004] Iodomethyn sodium salt is less developed and applied in pesticides due to the special chemical properties of iodine and the high cost of iodine-substituted intermediates. Currently, iodomethyn is mainly exported, and the market is mainly in Australia, the Americas and Europe. The domestic use is less, and the domestic preparation registration factory registers corn. Iodomethyn has not been popularized in China. Current research shows that in addition to having herbicidal activity, iodomethyn also has broad-spectrum fungicidal activity against some Pythium, and there is certain development potential in constructing transgenic crops resistant to sulfonylurea herbicides in the future. The damage rate of iodomethyn sodium salt alone to crops is 17%. SUMMARY

[0005] The purpose of the present application is to provide a multi-component complex herbicide composition for wheat field based on the prior art, which is prepared by complexing tribenuron, iodosulfuron-methyl-sodium, florasulam and pyrazoxyfen into water dispersible granules, has good control effect, stable physical and chemical properties, is not easy to decompose and deteriorate, has a suspension rate of more than 96%, and is simple to use because only one dispersion is needed during use.

[0006] The second purpose of the present application is to provide a preparation method of the multi-component complex herbicide composition for wheat field.

[0007] The technical solution of the present application is as follows:

[0008] The multi-component complex herbicide composition for wheat field comprises the following components in parts by weight: 5-50 parts of tribenuron, 1-20 parts of iodosulfuron-methyl-sodium, 1-25 parts of florasulam, 1-10 parts of pyrazoxyfen, 1-10 parts of polymaleic anhydride-acrylic acid polymer, 1-10 parts of carboxylate-sulfonate copolymer, 1-10 parts of alkyl naphthalene sulfonate, 1-10 parts of sodium lignosulfonate, 1-10 parts of EOPO block polyether sulfonate, 1-8 parts of fatty alcohol sulfonate, and 1-70 parts of filler; wherein the filler is one or more of sodium tripolyphosphate, corn starch, magnesium aluminum silicate or calcined kaolin.

[0009] The multi-component complex herbicide composition for wheat field provided by the present application is a water dispersible granule, and the components of tribenuron, iodosulfuron-methyl-sodium, florasulam, pyrazoxyfen, polymaleic anhydride-acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and filler are uniformly mixed in the preparation process, and airflow crushing is performed during the mixing process to obtain micro-powder with a particle size of 10-15 μm; the obtained micro-powder is kneaded with water, granulated, and dried to obtain the water dispersible granule.

[0010] In the present application, the carboxylate-sulfonate copolymer can be carboxylate-sulfonate copolymer (Qingyu SP2888); the alkyl naphthalene sulfonate can be alkyl naphthalene sulfonate (Shanhu W301); the EOPO block polyether sulfonate can be EOPO block polyether sulfonate (Keeng Winst 5503); and the fatty alcohol sulfonate can be fatty alcohol sulfonate (Rohm and Haas Wei / P).

[0011] In a preferred embodiment, the present application provides a multi-ingredient herbicide composition for wheat field, which is water dispersible granule and comprises the following components in parts by weight: tribenuron 7.5-40 parts, iofensulfuron sodium 5-13.5 parts, florasulam 2.5-16.5 parts, pyrazoxyfen 5-8 parts, polymaleic anhydride-acrylic acid polymer 2-6 parts, carboxylate-sulfonate copolymer 3-7 parts, alkyl naphthalene sulfonate 1-4 parts, sodium lignosulfonate 1-4 parts, EOPO block polyether sulfonate 2-6 parts, fatty alcohol sulfonate 1-5 parts, and filler 3-65 parts.

[0012] In a more preferred embodiment, the present application provides a multi-ingredient herbicide composition for wheat field, which is water dispersible granule and comprises the following components in parts by weight: tribenuron 7.5 parts, iofensulfuron sodium 5 parts, florasulam 2.5 parts, pyrazoxyfen 5 parts, polymaleic anhydride-acrylic acid polymer 3-5 parts, carboxylate-sulfonate copolymer 4-6 parts, alkyl naphthalene sulfonate 2-3 parts, sodium lignosulfonate 2-3 parts, EOPO block polyether sulfonate 3-5 parts, fatty alcohol sulfonate 2-4 parts, sodium tripolyphosphate 4-6 parts, magnesium aluminum silicate 2-4 parts, corn starch 9-11 parts, and calcined kaolin 37-39 parts.

[0013] In a particularly preferred embodiment, the present application provides a multi-ingredient herbicide composition for wheat field, which is water dispersible granule and comprises the following components in parts by weight: tribenuron 7.5 parts, iofensulfuron sodium 5 parts, florasulam 2.5 parts, pyrazoxyfen 5 parts, polymaleic anhydride-acrylic acid polymer 5 parts, carboxylate-sulfonate copolymer 5 parts, alkyl naphthalene sulfonate 3 parts, sodium lignosulfonate 3 parts, EOPO block polyether sulfonate 5 parts, fatty alcohol sulfonate 3 parts, sodium lignosulfonate 3 parts, sodium tripolyphosphate 5 parts, magnesium aluminum silicate 3 parts, corn starch 10 parts, and calcined kaolin 38 parts.

[0014] In another more preferred embodiment, the present application provides a multi-ingredient herbicide composition for wheat field, which is water dispersible granule and comprises the following components in parts by weight: tribenuron 40 parts, iofensulfuron sodium 13.5 parts, florasulam 16.5 parts, pyrazoxyfen 8 parts, polymaleic anhydride-acrylic acid polymer 3-5 parts, carboxylate-sulfonate copolymer 4-6 parts, alkyl naphthalene sulfonate 2-3 parts, sodium lignosulfonate 2-3 parts, EOPO block polyether sulfonate 3-5 parts, fatty alcohol sulfonate 2-4 parts, magnesium aluminum silicate 2-4 parts, and corn starch 2-4 parts.

[0015] In another particularly preferred aspect, the present application provides a multi-ingredient herbicide composition for wheat field, which is a water dispersible granule, and comprises the following components in parts by weight: 40 parts of tribenuron, 13.5 parts of iodosulfuron-methyl-sodium, 16.5 parts of florasulam, 8 parts of pyrazoxyfen, 3 parts of polymaleic anhydride-acrylic acid polymer, 5 parts of carboxylate-sulfonate copolymer, 2 parts of alkyl naphthalene sulfonate, 2 parts of sodium lignosulfonate, 3 parts of EOPO block polyether sulfonate, 3 parts of fatty alcohol sulfonate, 3 parts of magnesium aluminum silicate, and 1 part of corn starch.

[0016] The present application also provides a preparation method of the above multi-ingredient herbicide composition for wheat field, which comprises the following steps:

[0017] (1) uniformly mixing tribenuron, iodosulfuron-methyl-sodium, florasulam, pyrazoxyfen, polymaleic anhydride-acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate, and a filler, and performing air flow crushing in the mixing process to obtain a micro powder with a particle size of 10-15 μm;

[0018] (2) adding water to the micro powder obtained in step (1) and kneading, then performing granulation, drying the obtained wet granules, and thus obtaining a water dispersible granule.

[0019] In a preferred aspect, in step (1), the temperature during crushing is 10-25°C, and the pressure is 0.8-1.0 MPa.

[0020] In a preferred aspect, in step (2), the temperature during granulation is 20-45°C.

[0021] In a preferred aspect, in step (2), the particle size of the wet granules is 0.4-2.0 mm.

[0022] In a preferred aspect, in step (2), the temperature during drying is 50-85°C.

[0023] The present application also provides a preparation method of the above multi-ingredient herbicide composition for wheat field, which comprises the following more detailed steps:

[0024] (1) uniformly mixing tribenuron, iodosulfuron-methyl-sodium, florasulam, pyrazoxyfen, polymaleic anhydride-acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate, and a filler in a double helix mixer (I), performing air flow crushing in the mixing process, crushing at a temperature of 10-25°C and a pressure of 0.8-1.0 MPa, collecting by a cyclone separator and a cloth bag dust collector, mixing again in a helix mixer (II), and thus obtaining a uniform micro powder with a particle size of 10-15 μm;

[0025] (2) Add the micro powder obtained in step (1) into a kneader. With the total mass of the micro powder as 100%, add 15-20% water during kneading. After kneading, granulate using a granulator. During granulation, the temperature is 20-45℃. The particle size of the wet particles obtained is 0.4-2.0mm. Dry the wet particles at 50-85℃ to obtain columnar uniform particles. Control the moisture content at 1.0% to obtain water-dispersible granules.

[0026] The advantages of using the technical solution of this invention are as follows:

[0027] This invention provides a multi-component compound herbicide composition for wheat fields, which is formulated into water-dispersible granules by compounding bensulfuron-methyl, sodium iodide-methyl, diflubenzuron, and pyrazole-methyl. It has good control effect, stable physical and chemical properties, is not easy to decompose and deteriorate, and has a suspension rate of over 96%. In the process of use, only one dispersion is required, and the application process is simple. The water-dispersible granules are granular solids with good flowability. After pouring, they do not stick to the wall and will not leave residues in the packaging container to cause secondary pollution. Detailed Implementation

[0028] The present invention can be better understood from the following embodiments. However, those skilled in the art will readily understand that the descriptions in the embodiments are for illustrative purposes only and should not, and will not, limit the invention as detailed in the claims.

[0029] Example 1

[0030] A multi-component herbicide composition for wheat fields, the composition being a water-dispersible granule, comprising the following components in parts by weight:

[0031]

[0032] The preparation method of the above-mentioned multi-component compound herbicide composition for wheat fields includes the following steps:

[0033] (1) The following ingredients are mixed evenly in a double spiral mixer (Ⅰ): benzylsulfuron, sodium iodosulfuron, diflubenzuron, pyrazole oxychloride, polymaleic anhydride acrylic polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and filler (sodium tripolyphosphate, magnesium aluminum silicate, corn starch and calcined kaolin). During the mixing process, an air jet mill is used for air jet milling at a temperature of 10-25℃ and a pressure of 0.8-1.0MPa. The mixture is then collected by a cyclone separator and a bag filter dust collector and mixed again in a spiral mixer (Ⅱ) to obtain uniform micro powder with a particle size of 10-15μm.

[0034] (2) The micro-powder obtained in step (1) is added into a kneader, 15-20% water is added during kneading, and the kneaded product is granulated by using a granulator, the temperature during granulation is 20-45°C, the particle size of the obtained wet granules is 0.4-2.0 mm, the wet granules are dried at 50-85°C to obtain columnar uniform granules, and the moisture content is controlled at 1.0%, thus obtaining the water dispersible granules.

[0035] Example 2

[0036] A multi-component herbicide composition for wheat field, which is water dispersible granules, comprises the following components by weight:

[0037]

[0038] The preparation method of the above multi-component herbicide composition for wheat field comprises the following steps:

[0039] (1) uniformly mix benzylsulfonate, iodosulfuron-methyl-sodium, florasulam, pyrazoxyfen, polymaleic anhydride-acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and fillers (magnesium aluminum silicate and corn starch) in a double helix mixer (I), perform air flow crushing in the process of mixing, the temperature during crushing is 10-25°C, the pressure is 0.8-1.0 MPa, collect by a cyclone separator and a cloth bag dust collector, and mix again in a screw mixer (II) to obtain uniform micro-powder, the particle size of the micro-powder is 10-15 μm;

[0040] (2) add the micro-powder obtained in step (1) into a kneader, add 15-20% water during kneading, and granulate the kneaded product by using a granulator, the temperature during granulation is 20-45°C, the particle size of the obtained wet granules is 0.4-2.0 mm, dry the wet granules at 50-85°C to obtain columnar uniform granules, and control the moisture content at 1.0%, thus obtaining the water dispersible granules.

[0041] Comparative Example 1

[0042] A multi-component herbicide composition for wheat field, which is water dispersible granules, comprises the following components by weight:

[0043]

[0044] The preparation method of the above multi-component herbicide composition for wheat field comprises the following steps:

[0045] (1) The benzene sulfonate, iodomethane sulfonate sodium salt, diflufenican, polymaleic anhydride acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and filler (triple phosphate sodium, magnesium aluminum silicate, corn starch and calcined kaolin) are mixed uniformly in a double helix mixer (I), and air pulverization is performed in the mixing process by using an air flow pulverizer, the pulverization temperature is 10-25°C, the pressure is 0.8-1.0 MPa, then the product is collected by a cyclone separator and a cloth bag dust collector, and is mixed again in a spiral mixer (II) to obtain uniform micro powder, the micro powder particle size is 10-15 μm;

[0046] (2) The micro powder obtained in step (1) is added to a kneader, 15-20% water is added based on the total mass of the micro powder, and after kneading, a granulator is used for granulation, the granulation temperature is 20-45°C, the obtained wet granules have a particle size of 0.4-2.0 mm, the wet granules are dried at 50-85°C to obtain columnar uniform granules, the moisture content is controlled at 1.0%, and a water dispersible granule is obtained.

[0047] Comparative Example 2

[0048] A wheat field multi-component compounded herbicide composition, which is a water dispersible granule, comprises the following components by weight:

[0049]

[0050] The preparation method of the above-mentioned wheat field multi-component compounded herbicide composition comprises the following steps:

[0051] (1) The benzene sulfonate, iodomethane sulfonate sodium salt, diflufenican, polymaleic anhydride acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and filler (triple phosphate sodium, magnesium aluminum silicate, corn starch and calcined kaolin) are mixed uniformly in a double helix mixer (I), and air pulverization is performed in the mixing process by using an air flow pulverizer, the pulverization temperature is 10-25°C, the pressure is 0.8-1.0 MPa, then the product is collected by a cyclone separator and a cloth bag dust collector, and is mixed again in a spiral mixer (II) to obtain uniform micro powder, the micro powder particle size is 10-15 μm;

[0052] (2) The micro powder obtained in step (1) is added to a kneader, 15-20% water is added based on the total mass of the micro powder, and after kneading, a granulator is used for granulation, the granulation temperature is 20-45°C, the obtained wet granules have a particle size of 0.4-2.0 mm, the wet granules are dried at 50-85°C to obtain columnar uniform granules, the moisture content is controlled at 1.0%, and a water dispersible granule is obtained.

[0053] Effect data:

[0054] The water dispersible granules prepared by compounding sulfometuron, iodosulfuron-methyl-sodium, florasulam and metrafenone in the examples (example 1, example 2 and control example 1, control example 2) were tested for herbicidal effect on wheat, compared with 75% sulfometuron water dispersible granules (comparative example 1), 10% iodosulfuron-methyl-sodium water dispersible granules (comparative example 2) and 25% florasulam water dispersible granules (comparative example 3), and the test results are shown in Table 1.

[0055] Table 1 Herbicidal effect data

[0056]

[0057] As can be seen from Table 1, the water dispersible granules prepared in the examples have obvious synergistic effect compared with the single agent products on the market, and the herbicidal effect on gramineae and broadleaf weeds is increased by about 40-50%, and the herbicidal effect on wheat is safe and has no phytotoxicity. Compared with example 1-2, control examples 1 and 2 lack the component metrafenone, and the herbicidal effect on gramineae and broadleaf weeds is poor, and the herbicidal effect on wheat has phytotoxicity.

[0058] The water dispersible granules prepared by compounding sulfometuron, iodosulfuron-methyl-sodium, florasulam and metrafenone in the examples (example 1, example 2) were tested for physical and chemical stability, and the test results are shown in Table 2.

[0059] Table 2 Physical and chemical stability test data

[0060]

[0061]

[0062] As can be seen from Table 2, the water dispersible granules prepared in the examples have high suspension rate, and even if stored at 54℃, the suspension effect is not affected.

[0063] The above examples are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that it is still possible to modify the technical solutions described in the foregoing examples, or to make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-component herbicidal composition for use in wheat fields, characterized in that, The composition is water dispersible granule, comprising the following components by weight: 5-50 parts of tribenuron, 1-20 parts of iofensulfuron sodium salt, 1-25 parts of florasulam, 1-10 parts of pyroxasulfone, 1-10 parts of polymaleic anhydride-acrylic acid polymer, 1-10 parts of carboxylate-sulfonate copolymer, 1-10 parts of alkyl naphthalene sulfonate, 1-10 parts of sodium lignosulfonate, 1-10 parts of EOPO block polyether sulfonate, 1-8 parts of fatty alcohol sulfonate, 1-70 parts of filler; wherein the filler is one or several of sodium tripolyphosphate, corn starch, magnesium aluminum silicate or calcined kaolin.

2. The multi-component wheat field herbicidal composition according to claim 1, characterized in that, During its preparation process, tribenuron, iofensulfuron sodium salt, florasulam, pyroxasulfone, polymaleic anhydride-acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and filler are mixed uniformly, and airflow crushing is carried out during the mixing process to form micro powder with a particle size of 10-15 μm; the obtained micro powder is kneaded with water, granulated, dried, and the water dispersible granule is obtained.

3. The multi-component wheat field herbicidal composition according to claim 1, wherein The water dispersible granule comprises the following components by weight: 7.5-40 parts of tribenuron, 5-13.5 parts of iofensulfuron sodium salt, 2.5-16.5 parts of florasulam, 5-8 parts of pyroxasulfone, 2-6 parts of polymaleic anhydride-acrylic acid polymer, 3-7 parts of carboxylate-sulfonate copolymer, 1-4 parts of alkyl naphthalene sulfonate, 1-4 parts of sodium lignosulfonate, 2-6 parts of EOPO block polyether sulfonate, 1-5 parts of fatty alcohol sulfonate, 3-65 parts of filler.

4. The multi-component wheat field herbicidal composition according to claim 3, characterized in that, The water dispersible granule comprises the following components by weight: 7.5 parts of tribenuron, 5 parts of iofensulfuron sodium salt, 2.5 parts of florasulam, 5 parts of pyroxasulfone, 3-5 parts of polymaleic anhydride-acrylic acid polymer, 4-6 parts of carboxylate-sulfonate copolymer, 2-3 parts of alkyl naphthalene sulfonate, 2-3 parts of sodium lignosulfonate, 3-5 parts of EOPO block polyether sulfonate, 2-4 parts of fatty alcohol sulfonate, 4-6 parts of sodium tripolyphosphate, 2-4 parts of magnesium aluminum silicate, 9-11 parts of corn starch, 37-39 parts of calcined kaolin; preferably, 7.5 parts of tribenuron, 5 parts of iofensulfuron sodium salt, 2.5 parts of florasulam, 5 parts of pyroxasulfone, 5 parts of polymaleic anhydride-acrylic acid polymer, 5 parts of carboxylate-sulfonate copolymer, 3 parts of alkyl naphthalene sulfonate, 3 parts of sodium lignosulfonate, 5 parts of EOPO block polyether sulfonate, 3 parts of fatty alcohol sulfonate, 3 parts of sodium lignosulfonate, 5 parts of sodium tripolyphosphate, 3 parts of magnesium aluminum silicate, 10 parts of corn starch, 38 parts of calcined kaolin.

5. The multi-component wheat field herbicidal composition according to claim 3, wherein The water dispersible granules comprise the following components by weight: tribenuron 40 parts, iodosulfuron-methyl-sodium 13.5 parts, florasulam 16.5 parts, pyrazoxyfen 8 parts, polymaleic anhydride-acrylic acid polymer 3-5 parts, carboxylate-sulfonate copolymer 4-6 parts, alkyl naphthalene sulfonate 2-3 parts, sodium lignosulfonate 2-3 parts, EOPO block polyether sulfonate 3-5 parts, fatty alcohol sulfonate 2-4 parts, magnesium aluminum silicate 2-4 parts, corn starch 1 part; preferably, tribenuron 40 parts, iodosulfuron-methyl-sodium 13.5 parts, florasulam 16.5 parts, pyrazoxyfen 8 parts, polymaleic anhydride-acrylic acid polymer 3 parts, carboxylate-sulfonate copolymer 5 parts, alkyl naphthalene sulfonate 2 parts, sodium lignosulfonate 2 parts, EOPO block polyether sulfonate 3 parts, fatty alcohol sulfonate 3 parts, magnesium aluminum silicate 3 parts, corn starch 1 part.

6. The method of preparing the multi-component herbicidal composition for wheat field according to claim 1, characterized in that, The method comprises the following steps: (1) uniformly mixing tribenuron, iodosulfuron-methyl-sodium, florasulam, pyrazoxyfen, polymaleic anhydride-acrylic acid polymer, carboxylate-sulfonate copolymer, alkyl naphthalene sulfonate, sodium lignosulfonate, EOPO block polyether sulfonate, fatty alcohol sulfonate and the filler, and performing airflow crushing during the mixing process to form micro-powder with a particle size of 10-15 μm; (2) adding water to the micro-powder obtained in step (1) and kneading, then performing granulation, drying the obtained wet granules, and obtaining the water dispersible granules.

7. The method of claim 6, wherein the mixture is prepared by mixing the herbicides in the order of the herbicides listed in claim 6. In step (1), the temperature during the crushing is 10-25°C, and the pressure is 0.8-1.0 MPa.

8. The method of claim 6, wherein the mixture is prepared by mixing the herbicides in the ratio of 1: 1 to 1:

3. In step (2), the temperature during the granulation is 20-45°C.

9. The method for preparing the multi-component compound herbicide composition for wheat fields according to claim 6, characterized in that, In step (2), the particle size of the wet granules is 0.4-2.0 mm.

10. The method of claim 6, wherein the wheat field multi-component complex herbicide composition is prepared by mixing the herbicide and the surfactant in a weight ratio of 1: 0.01 to 1: 0.

1. In step (2), the temperature during the drying is 50-85°C.

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