Herbicide composition containing sulfentrazone and application thereof

Abstract

The invention provides a herbicide composition containing sulfentrazone. The composition comprises an effective component sulfentrazone, a solvent and / or a solid carrier. The composition also contains one or two of other effective components such as pendimethalin and pyroxasulfone. The invention also provides application of the composition in prevention and control of sunflower field weeds, especially malignant weeds such as solanum nigrum, chenopodium album and amaranthus retroflexus.

Description

Technical Field

[0001] The invention relates to the technical field of plant protection, and in particular to a herbicidal composition containing sulfentrazone and application thereof. Technical Background

[0002] Sulfonamide (N(2,4-dichloro-5(4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H1,2,4-triazol-1-yl)phenyl)methanesulfonamide, CAS registration number: 122836355) is a protoporphyrinogen oxidase inhibitor. By inhibiting protoporphyrinogen oxidase, excessive protoporphyrin IX is produced in plant cells. The latter is a photosensitizer, which leads to the production of reactive oxygen in cells, and eventually causes the rupture of cell membranes and vacuole membranes, the leakage of intracellular solutes, and the death of cells due to drying. The half-life in soil is 110 to 280 days, and both stem and leaf treatment and soil treatment are possible; it is suitable for the prevention and control of annual broad-leaved weeds, grass weeds and sedge weeds, such as morning glory, Amaranthus retroflexus, Chenopodium album, Datura stramonium, Digitaria, Setaria viridis, Xanthium sibiricum, Goosegrass, Cyperus rotundus, Cyperus rotundus, etc. in fields of corn, sorghum, soybeans, peanuts, etc.

[0003] Pendimethalin is a dinitroaniline herbicide. It mainly inhibits the division of meristem cells and does not affect the germination of weed seeds. Instead, it works after the young shoots, stems and roots absorb the agent during the germination of weed seeds. It is suitable for corn, soybeans, cotton, vegetables and orchards to control annual grass and broad-leaved weeds such as crabgrass, foxtail grass, bluegrass, foxtail grass, foxtail grass, goosegrass, gray lily, champignon intestine, quinoa, and amaranth.

[0004] Sulfonepyraclostrobin is a new type of broad-spectrum, highly active pre-emergence soil treatment agent developed by Kumizu Chemical Co., Ltd. of Japan. Its mechanism of action is a very long-chain fatty acid elongation synthase inhibitor. After application, it is absorbed by the young roots or young shoots of weeds, inhibits the biosynthesis of very long-chain fatty acid elongation synthase, and causes the construction of fatty acid precursor substances, which can inhibit the early growth of seedlings, destroy meristems and coleoptiles, and exert its efficacy. It can be used for corn, soybeans, cotton, wheat, sunflowers, potatoes, peanuts and other crops, and effectively prevents grass weeds such as foxtail, crabgrass, barnyard grass, and broad-leaved weeds such as amaranth and sophora japonica.

[0005] Solanum nigrum L., commonly known as black bean, is also known as bitter sunflower, wild loquat, crow's eye, dog milk, wild grape, and Tianbao bean. It is an annual herbaceous plant of the Solanaceae family. It is a common weed in farmland and mainly harms crops such as corn, peanuts, beans, tobacco, melons, vegetables, potatoes, and cotton.

[0006] Chenopodium album L., also known as gray vegetable and gray vegetable, is an annual herb belonging to the Chenopodium family. It is a malignant weed in the world, mainly harming wheat, cotton, beans, potatoes, vegetables, peanuts, corn and melons.

[0007] Amaranthus retroflexus L., commonly known as west wind valley and wild amaranth, is an annual herb belonging to the Amaranthaceae family. It is drought-resistant and has strong adaptability. It is a common weed in farmland, vegetable gardens, orchards, wastelands, etc. It mainly harms cotton, peanuts, corn, beans, potatoes, melons, vegetables and fruit trees.

[0008] At present, the commonly used herbicides for sunflowers are mainly pendimethalin, butralin, S-isopropylamine, etc. These herbicides have unsatisfactory control effects on weeds, especially broad-leaved weeds such as Solanum nigrum, Chenopodium album, Amaranthus retroflexus, and Cyperus rotundus.

[0009] In view of the problem of the insufficiency of the existing technology, the present invention has found through indoor screening and field efficacy tests that sulfentrazone has a very good control effect on weeds such as Solanum nigrum, Chenopodium album, and Amaranthus retroflexus, and also has a good control effect on other annual broad-leaved weeds and grass weeds, and is relatively safe for sunflowers. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a herbicidal composition containing sulfentrazone which has good control effect on annual grass and broad-leaved weeds in sunflower fields and application thereof.

[0011] Technical solution of the present invention is as follows:

[0012] The technical solution for achieving the first object of the present invention is a herbicidal composition containing sulfentrazone, wherein the active ingredients are A and B.

[0013] When component A is sulfentrazone and component B is pendimethalin, the weight ratio of component A to component B is 1-80:80-1;

[0014] When component A is sulfentrazone and component B is sulfentrazone, the weight ratio of component A to component B is 1-80:50-1;

[0015] The active ingredient accounts for 1% to 90% of the total weight of the herbicidal composition.

[0016] Optionally, the active ingredient accounts for 5% to 85% of the total weight of the herbicidal composition.

[0017] The herbicidal composition is in the form of a suspension, water-dispersible granules, wettable powder, granules, dispersible oil suspension or microcapsule suspension.

[0018] The technical solution for achieving the second object of the present invention is the application of the above-mentioned herbicidal composition in controlling weeds in sunflower fields.

[0019] The weeds are annual grass weeds and broadleaf weeds in sunflower fields.

[0020] The present invention has positive effects:

[0021] (1) The weed control spectrum of A and B in the herbicidal composition of the present invention is complementary after compounding.

[0022] It has a good control effect on annual grass weeds and broad-leaved weeds in sunflowers, effectively controls some difficult-to-control weeds and resistant weeds, and is safe for sunflowers and the next crop.

[0023] (2) The interaction type of A and B after compounding in the herbicidal composition of the present invention is additive and synergistic, the prevention effect is enhanced, the application effect is significantly better than the sum of the theoretical effects of the single agent, and the dominant weeds can be better controlled to cause harm. The use of B makes up for the deficiency of the high dosage of sulfentrazone, has the effects of synergy, synergy, reduced dosage, good selectivity, outstanding prevention effect on antagonistic weeds, and safety for crops. The actual weed control effect is significantly better than the theoretical sum of the single agent, and has a very practical and broad application prospect in production.

[0024] (3) The rapid-acting and long-lasting effects of the herbicidal composition of the present invention complement each other effectively, avoiding the problem of rapid development of weed resistance caused by the use of a single herbicide, delaying the development of weed resistance, and extending the service life of the herbicide; in addition, the amount of medicine used is reduced, the cost of use is reduced, which is of great significance to the protection of the ecological environment and also improves the safety of crops. DETAILED DESCRIPTION

[0025] Introduced below are some of the multiple possible embodiments of the present invention, which are intended to provide a basic understanding of the present invention, and are not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection. According to the technical solution of the present invention, without changing the essential spirit of the present invention, a person of ordinary skill in the art can propose other mutually replaceable implementations. Therefore, the following specific implementations are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0026] This application provides the following technical solutions:

[0027] Technical solution 1, a herbicidal composition containing sulfentrazone, wherein the active ingredients are A and B.

[0028] When component A is sulfentrazone and component B is pendimethalin, the weight ratio of component A to component B is 1-80:80-1;

[0029] When component A is sulfentrazone and component B is sulfentrazone, the weight ratio of component A to component B is 1-80:50-1;

[0030] In technical solution 2, when component A is sulfentrazone and component B is pendimethalin, the weight ratio of component A to component B is 1-30:70-1;

[0031] When component A is sulfentrazone and component B is sulfentrazone, the weight ratio of component A to component B is 1-75:40-1;

[0032] Technical solution 3: A herbicidal composition containing sulfentrazone as described in any one of Technical Solution 1, wherein the active ingredient accounts for 1% to 90% of the total weight of the herbicidal composition.

[0033] Technical solution 4: A herbicidal composition containing sulfentrazone as described in any one of Technical Solutions 1 to 3, wherein the active ingredient accounts for 5% to 85% of the total weight of the herbicidal composition.

[0034] Technical solution 5: A herbicidal composition containing sulfentrazone as described in any one of Technical Solutions 1 to 4, wherein the herbicidal composition is in the form of a suspension, water-dispersible granules, wettable powder, granules, dispersible oil suspension or microcapsule suspension.

[0035] The various application formulations prepared by the herbicidal composition of Technical Solution 6 include, in addition to the effective active ingredients, various auxiliary ingredients permitted and acceptable in pesticides.

[0036] The auxiliary components described in Technical Solution 7 include, but are not limited to: solvents, wetting agents, emulsifiers, thickeners, dispersants, defoaming agents, antifreeze agents, preservatives, stabilizers, binders, disintegrants, solid carriers, liquid carriers, deionized water, etc.

[0037] The herbicidal composition of the present invention may further include other agriculturally active ingredients, such as other types of fungicides, herbicides, insecticides, fertilizers and safeners and other pesticide active ingredients and / or additives and / or pesticide adjuvants commonly used in plant protection, or may be used together with them.

[0038] Technical solution 8: Use of the herbicidal composition containing sulfentrazone as described in any one of technical solutions 1 to 7 for weed control in sunflower fields. The weeds are annual grass weeds and broadleaf weeds in the sunflower field.

[0039] (Example 1, 36% suspension)

[0040] 36% sulfentrazone·pendimethalin suspension: sulfentrazone 3% pendimethalin 33%, wetting agent phenethylphenol polyoxyethylene ether 5%, dispersant polycarboxylate 3%, antifreeze agent propylene glycol 5%, rheological agent magnesium aluminum silicate 1%, thickener xanthan gum 0.3%, sodium benzoate 0.3%, water is supplemented to 100%, and the above and following embodiments are all weight percentages.

[0041] Preparation method: put the active ingredient, wetting agent, dispersant, antifreeze agent, rheological agent and water into a stirring tank, stir thoroughly, then pump the material into a sand mill for thorough grinding. After grinding, pump the material into a high-speed shearing machine, add a thickener and sodium benzoate, and perform high-speed shearing. After shearing, the suspension is obtained.

[0042] (Example 2, 16% suspension)

[0043] 16% sulfentrazone-pyraclostrobin suspension: sulfentrazone 6%, pyraclostrobin 10%, wetting agent phenethylphenol polyoxyethylene ether 5%, dispersant polycarboxylate 3%, antifreeze agent propylene glycol 5%, rheological agent magnesium aluminum silicate 1%, thickener xanthan gum 0.3%, sodium benzoate 0.3%, water is added to 100%.

[0044] Preparation method: put the active ingredient, wetting agent, dispersant, antifreeze agent, rheological agent and water into a stirring tank, stir thoroughly, then pump the material into a sand mill for thorough grinding. After grinding, pump the material into a high-speed shearing machine, add a thickener and sodium benzoate, and perform high-speed shearing. After shearing, the suspension is obtained.

[0045] (Example 3, 72% water dispersible granules)

[0046] 72% sulfentrazone·pendimethalin water dispersible granules: sulfentrazone 6%, pendimethalin 66%, polycarboxylate dispersant 3%, sodium lauryl sulfate 3%, dispersant sodium lignin sulfonate 6%, disintegrant ammonium sulfate 4%, filler kaolin is supplemented to 100%.

[0047] Preparation method: After all materials are mixed evenly, they are crushed by a jet mill and mixed evenly again. Then, a certain amount of water is added to knead the mixture, extruded into granules, and dried and sieved to obtain water-dispersible granules.

[0048] (Example 4, 36% water dispersible granules)

[0049] 36% sulfentrazone·pendimethalin water dispersible granules: sulfentrazone 16%, sulfonepyrazone 20%, polycarboxylate dispersant 3%, sodium lauryl sulfate 3%, dispersant sodium lignin sulfonate 6%, disintegrant ammonium sulfate 4%, filler kaolin is supplemented to 100%.

[0050] Preparation method: After all materials are mixed evenly, they are crushed by a jet mill and mixed evenly again. Then, a certain amount of water is added to knead the mixture, extruded into granules, and dried and sieved to obtain water-dispersible granules.

[0051] (Example 5, 72% wettable powder)

[0052] 72% sulfentrazone·pendimethalin wettable powder: sulfentrazone 18%, pendimethalin 54%, wetting agent sodium lauryl sulfate 4%, dispersant sodium naphthalenesulfonate formaldehyde condensate 6%, filler diatomaceous earth to make up to 100%.

[0053] Preparation method: The active ingredient and the auxiliary agents are mixed evenly, put into a mechanical crusher for initial crushing, then crushed by a jet mill, and then mixed evenly to obtain a wettable powder.

[0054] (Example 6, 26% wettable powder)

[0055] 26% sulfentrazone·pyraclostrobin wettable powder: sulfentrazone 16%, pyraclostrobin 10%, wetting agent sodium lauryl sulfate 4%, dispersant sodium naphthalenesulfonate formaldehyde condensate 6%, filler diatomaceous earth to make up to 100%.

[0056] Preparation method: The active ingredient and the auxiliary agents are mixed evenly, put into a mechanical crusher for initial crushing, then crushed by a jet mill, and then mixed evenly to obtain a wettable powder.

[0057] (Example 7, 25% granules)

[0058] 25% sulfentrazone·pendimethalin granules: sulfentrazone 5%, pendimethalin 20%, wetting agent alkyl succinate sulfonate 0.6%, dispersant alkylphenol polyoxyethylene ether formaldehyde condensate sulfonate 1.0%, colorant basic green (malachite green) 0.2%, filler bentonite to make up to 100%.

[0059] Preparation method: After the active ingredient and various auxiliary agents are evenly mixed, a certain amount of water is added to knead the mixture, extrusion granulation is performed, and granules are obtained after drying and sieving.

[0060] (Example 8, 22% granules)

[0061] 22% sulfentrazone·pyraclostrobin granules: sulfentrazone 12%, pyraclostrobin 10%, wetting agent alkyl succinate sulfonate 0.6%, dispersant alkylphenol polyoxyethylene ether formaldehyde condensate sulfonate 1.0%, colorant basic green (malachite green) 0.2%, filler bentonite to make up to 100%.

[0062] Preparation method: After the active ingredient and various auxiliary agents are evenly mixed, a certain amount of water is added to knead the mixture, extrusion granulation is performed, and granules are obtained after drying and sieving.

[0063] (Example 9, 16% dispersible oil suspension)

[0064] 16% sulfentrazone·pyraclostrobin dispersible oil suspension: sulfentrazone 6%, pyraclostrobin 10%, phosphate dispersant 3%, emulsifier alkylbenzene polyoxyethylene ether 7%, calcium dodecylbenzene sulfonate 7%, fumed silica 1%, thickener organic bentonite 2%, and dispersion medium methyl oleate supplemented to 100%.

[0065] Preparation method: put the active ingredients, emulsifier, dispersant, calcium dodecylbenzene sulfonate, fumed silica and dispersion medium into a stirring kettle, stir thoroughly, pump into a high-speed shearing machine for high-speed shearing, and then pump into a sand mill for filling.

[0066] After the sand grinding is qualified, add the thickener and stir evenly to obtain the dispersible oil suspension.

[0067] (Example 10, 36% dispersible oil suspension)

[0068] 36% sulfentrazone·pendimethalin dispersible oil suspension: sulfentrazone 4%, pendimethalin 32%, phosphate dispersant 3%, emulsifier alkylbenzene polyoxyethylene ether 7%, calcium dodecylbenzene sulfonate 7%, fumed silica 1%, thickener organic bentonite 2%, and dispersion medium methyl oleate supplemented to 100%.

[0069] Preparation method: put the active ingredients, emulsifier, dispersant, calcium dodecylbenzene sulfonate, fumed silica and dispersion medium into a stirring kettle, stir thoroughly, pump into a high-speed shearing machine for high-speed shearing, and then pump into a sand mill for filling.

[0070] After the sand grinding is qualified, add the thickener and stir evenly to obtain the dispersible oil suspension.

[0071] (Example 11, 20% microcapsule suspension)

[0072] 20% sulfentrazone·pyraclostrobin microcapsule suspension: sulfentrazone 12%, pyraclostrobin 8%, solvent xylene 10%, solvent dibutyl phthalate 6%, oily capsule skin 1,6-hexamethylene diisocyanate 5%, aqueous capsule skin ethylenediamine 3%, emulsifier alkylphenol formaldehyde resin polyoxyethylene ether 6%, dispersant EO-PO block polyether 7%, thickener magnesium aluminum silicate 0.2%, and the dispersion medium water is supplemented to 100%.

[0073] Preparation method: After the active ingredient is fully dissolved in the solvent, add the oily capsule skin and stir thoroughly to form an oil phase; pour it into the aqueous phase mixed with an emulsifier and a dispersant, perform high-speed shearing, then add the aqueous capsule skin and stir evenly, then heat to 70°C and keep warm for 2 hours to cure to form microcapsules, finally add a thickener and stir evenly to obtain a microcapsule suspension.

[0074] (Example 12, 36% microcapsule suspension)

[0075] 36% sulfentrazone·pentadimethoxam microcapsule suspension: sulfentrazone 3%, pendimethalin 33%, solvent xylene 10%, solvent dibutyl phthalate 6%, oily capsule skin 1,6-hexamethylene diisocyanate 5%, aqueous capsule skin ethylenediamine 3%, emulsifier alkylphenol formaldehyde resin polyoxyethylene ether 6%, dispersant EO-PO block polyether 7%, thickener magnesium aluminum silicate 0.2%, and the dispersion medium water is supplemented to 100%.

[0076] Preparation method: After the active ingredient is fully dissolved in the solvent, add the oily capsule skin and stir thoroughly to form an oil phase; pour it into the aqueous phase mixed with an emulsifier and a dispersant, perform high-speed shearing, then add the aqueous capsule skin and stir evenly, then heat to 70°C and keep warm for 2 hours to cure to form microcapsules, finally add a thickener and stir evenly to obtain a microcapsule suspension.

[0077] Test Example 1: Indoor biological activity test)

[0078] Test agents: 50% sulfentrazone suspension concentrate, 330g / L pendimethalin emulsifiable concentrate, 40% pyraclostrobin suspension concentrate.

[0079] Test targets: Several representative weeds from the grass family and broadleaf weeds, including Solanum nigrum, Chenopodium album, and Amaranthus retroflexus, were selected as test weeds. The remaining weeds were annual weeds, and their seeds were collected from the field for reproduction.

[0080] Drug preparation design: 50% sulfentrazone suspension is prepared into 6, 8, 10, 12, 16, 20, 24g / mu solution for standby use; dimethoate is prepared into 66g / mu solution for standby use; sulfentrazone is prepared into 8, 10g / mu solution for standby use

[0081] The mixture of sulfentrazone and pendimethalin is prepared into 6+66, 8+66, 10+66, 12+66, 16+66, 20+66, 24+66, g / mu solution for use.

[0082] The mixture of sulfentrazone and sulfonepyraclostrobin is prepared as follows: 8+10, 10+10, 12+10, 16+10, 20+10

[0083] Test method: A certain amount of soil was placed in a plastic pot with a height of 6 cm and a diameter of 9 cm. 15 to 20 target weed seeds were sown in the plastic pot, covered with 0.5 to 1 cm thick fine soil and placed in a greenhouse for cultivation. The tested agent was sprayed on the soil surface, 1 mL of the solution was sprayed per pot, and each treatment was repeated 4 times, and a treatment without spraying the agent was set as a control. After treatment, the test material was placed in a greenhouse for cultivation, and the growth of the target weeds was observed regularly. After 20 days, the target damage symptoms and growth inhibition were visually observed, and the fresh weight of the part above the soil was weighed. The toxicity of the agent to the target weeds was evaluated by the target fresh weight inhibition rate.

[0084] Investigation method: 20 days after the experimental treatment, the target damage symptoms and growth inhibition were visually observed, the fresh weight of the above-ground part was weighed, and the fresh weight inhibition rate (%) was calculated.

[0085] Evaluation method of combined action: The combination of herbicides was evaluated according to the Gowing method (NY / T 1155.7-2006), and the formula is as follows:

[0086] E0﹦X﹢Y–XY / 100.

[0087] Wherein, X is the fresh weight inhibition rate of target weeds when sulfentrazone is used alone at a certain dose; Y is the fresh weight inhibition rate of target weeds when component B is used alone at a certain dose; E0 is the theoretical value of the fresh weight inhibition rate of target weeds when sulfentrazone and component B are mixed; E is the measured value of the fresh weight inhibition rate of target weeds when sulfentrazone and component B are mixed.

[0088] Evaluation criteria: When E–E0>10%, it indicates a synergistic effect; when –10%≤E–E0≤10%, it indicates an additive effect; when E–E0<–10%, it indicates an antagonistic effect.

[0089] Table 1. Indoor toxicity test of each pesticide treatment on Chenopodium album.

[0090]

[0091]

[0092] It can be seen from Table 1 that when sulfentrazone + pendimethalin or pyraclostrobin are combined, they have an additive effect on Chenopodium album.

[0093] Table 2. Indoor toxicity test of each agent treatment on Solanum nigrum

[0094]

[0095]

[0096] It can be seen from Table 2 that the compounding of A+B has an additive or synergistic effect on Solanum nigrum.

[0097] Table 3. Indoor toxicity test of each agent treatment on Amaranthus retroflexus

[0098]

[0099]

[0100] As can be seen from Table 3, the combination of A+B embodiments has an additive or synergistic effect on Amaranthus retroflexus

[0101] In summary, the embodiment combination of sulfentrazone and pendimethalin, sulfonepyraclostrobin has an additive or synergistic effect on the control of weeds such as Chenopodium album, Solanum nigrum, and Amaranthus retroflexus.

[0102] (Test Example 2, Field Efficacy Test)

[0103] Test agents: 12 binary compound example combinations in Examples 1 to 12.

[0104] Control agents: 330 g / L pendimethalin emulsifiable concentrate, 50% sulfentrazone suspension concentrate, and 40% pyraclostrobin suspension concentrate.

[0105] Test crop: Sunflower.

[0106] Target: Annual broadleaf weeds, grass weeds

[0107] Test method: According to the area of ​​the test plot, accurately weigh various pesticides, dilute with water, and use a backpack sprayer to spray evenly. Use a fan-shaped nozzle dedicated to herbicides. When spraying, pay attention to spraying the liquid medicine evenly into the test plot to prevent over-spraying and missed spraying; Examples 7 and 8 are granules, and when applying the medicine, mix with fine soil 20kg / mu and spread evenly.

[0108] Observe the emergence and growth of crops within 1-15 days after application to determine whether the pesticide has any harm to the crops.

[0109] The death of weeds was observed 20 days and 40 days after application, the number of weeds or fresh weight was counted, and the herbicidal activity of each agent was compared.

[0110] Table 4. Field efficacy test results

[0111]

[0112]

[0113] The results of field tests show that the mixed use of sulfentrazone, pendimethalin and sulfamethoxam has the obvious effect of expanding the weed control spectrum, improving the weed control activity and enhancing the weed control effect, which makes up for the shortcomings of using sulfentrazone at high dosages.

[0114] Observation was performed 7, 10 and 15 days after application. No adverse phenomena such as yellowing leaves, whitening, contact spots, cessation of growth and dead seedlings were observed in the sunflower seedlings treated with each embodiment combination and the control agent treatment area. The growth was normal, which was consistent with the growth of small sunflowers in the blank control area, with no significant difference, indicating that each embodiment combination is safe for sunflower growth under the condition of this dosage.

[0115] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements can be made without departing from the spirit and scope of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A herbicidal composition containing sulfentrazone, characterized in that: The invention comprises active ingredients A and B, wherein the active ingredient A is sulfentrazone, and the active ingredient B is selected from one or two of pendimethalin and pyraclostrobin.

2. The composition according to claim 1, characterized in that The content of active ingredient A in one or more of the sulfentrazone and its agriculturally acceptable salts is 1%-90% by weight.

3. The composition according to claim 1, characterized in that The composition further comprises an active ingredient B, which is one or two of pendimethalin and pyraclostrobin; the total content of the active ingredients A and B is 5%-85% by weight.

4. The composition according to claim 1, characterized in that The solvent is one or more of water, aromatic compounds, paraffin, alcohols, ketones, amides, esters and heterocyclics; the solid carrier is one or more of natural minerals, plant-derived carriers, synthetic carriers and inorganic salts.

5. The composition according to any one of claims 1 to 4, characterized in that The composition further contains one or more of a surfactant, a thickener, a defoaming agent, an antifreeze agent, a preservative and a dye.

6. The herbicidal composition containing sulfentrazone according to claims 1-5, characterized in that: The herbicidal composition is in the form of a suspension, water-dispersible granules, wettable powder, granules, dispersible oil suspension or microcapsule suspension.

7. Use of the herbicidal composition according to claim 1 in controlling weeds in farmland.

8. Use of the herbicidal composition according to claims 1 to 7 in controlling weeds in farmland, wherein the weeds are annual grass weeds and broadleaf weeds of sunflower.

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