Weeding composition containing saflufenacil and tembotrione and application thereof

Abstract

The invention discloses a weeding composition containing saflufenacil and tembotrione, the effective components of the weeding composition comprise an active component A, an active component B and an active component C. The active component A is saflufenacil, the active component B is tembotrione, and the active component C is terbuthylazine. The weeding composition can be used for preventing and removing annual or perennial weeds, is wide in weeding spectrum, can remarkably improve the utilization rate of the herbicide, reduces the dosage, prolongs the service life of the herbicide, and makes a contribution to agricultural sustainable development.

Description

Technical Field

[0001] The invention belongs to the technical field of herbicide compositions, and particularly relates to a herbicide composition containing saflufenacil and tembotrione and an application thereof. Background Art

[0002] Corn is one of the world's three major food crops, boasting the highest global production, and is also a significant cash crop and feed crop. Weeds regularly infest over 420 million mu (approximately 1.5 hectares) of cornfields. Agricultural weed control is crucial in agricultural production. Corn is primarily divided into spring and summer corn depending on its planting period. Major weeds include tangerine peel, barnyard grass, Amaranthus retroflexus, Purslane, clematis, and dayflower. These weeds are numerous, numerous, and destructive, especially during the seedling stage, where they compete with corn for light, water, nutrients, and growing space, impacting yield and quality.

[0003] Safflumethoxam is a protoporphyrinogen oxidase (PPO) inhibitor with high activity against a variety of monocotyledonous and dicotyledonous weeds; cymbalta is an HPPD-inhibiting herbicide, mainly used to control grass and broad-leaved weeds in the early to mid-stage after corn emergence in the field. It has excellent control effects and does not cause phytotoxicity to subsequent crops; terbuthylazine is a photosystem II inhibitor that kills weeds by blocking photosynthesis.

[0004] This study determined the combined herbicidal effect of saflufenacil, tembotrione, and terbuthylazine on corn field weeds indoors, and conducted corresponding field efficacy tests. The results showed that each combination can achieve a synergistic effect of multiple action mechanisms within a certain ratio range, thereby improving weed control efficiency, delaying the development of weed resistance, and having high safety. Summary of the Invention

[0005] Based on the above situation, the object of the present invention is to provide a herbicidal composition containing benzylsulfuron and tembotrione.

[0006] Another object of the present invention is to provide a herbicidal composition containing saflufenacil and tembotrione for use in controlling weeds in corn fields. The herbicidal composition can achieve a synergistic effect of multiple action mechanisms within a certain ratio range, thereby improving weed control efficiency, delaying the development of weed resistance, and having high safety.

[0007] In order to achieve the above objectives, the present invention provides the following technical solution: a herbicidal composition containing saflufenacil and tembotrione, wherein the effective ingredients of the herbicidal composition include active ingredient A, active ingredient B and active ingredient C, wherein the active ingredient A is saflufenacil, the active ingredient B is tembotrione, and the active ingredient C is terbuthylazine;

[0008] Furthermore, the mass ratio of active ingredient A, active ingredient B and active ingredient C of the herbicidal composition is 0.5-20:1-30:10-200;

[0009] Furthermore, the mass ratio of saflufenacil, tembotrione and terbuthylazine is 3-12:6-18:60-120;

[0010] Furthermore, the mass ratio of benzsulfamide, tembotrione and terbuthylazine is 3+6+60, 3+6+90, 3+6+120, 3+12+60, 3+12+90, 3+12+120, 3+18+60, 3+18+90, 3+18+120, 6+6+60, 6+6+90, 6+6+120, 6+12+60, 6+12+90, 6+12+120, 6+18+60, 6+18+90, 6+18+120, 12+6+60, 12+6+90, 12+6+120, 12+12+60, 12+12+90, 12+12+120, 12+18+60, 12+18+90, 12+18+120;

[0011] Furthermore, the mass ratio of benzsulfamide, tembotrione and terbuthylazine is 3+6+60, 3+6+90, 3+12+60, 3+12+90, 3+12+120, 3+18+60, 3+18+90, 3+18+120, 6+6+60, 6+6+90, 6+6+120, 6+12+60, 6+12+90, 6+12+120, 6+18+60, 6+18+90, 6+18+120, 12+6+60, 12+6+90, 12+6+120, 12+12+60, 12+12+90, 12+12+120, 12+18+90, 12+18+120;

[0012] Furthermore, the mass percentage of the active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 1 to 90%;

[0013] Furthermore, the mass percentage of the active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 5 to 85%;

[0014] Furthermore, the herbicidal composition further comprises, in addition to the active ingredient, agriculturally acceptable auxiliary ingredients, wherein the auxiliary ingredients are selected from one or more of a wetting agent, a dispersant, an emulsifier, a thickener, a disintegrant, an antifreeze agent, a defoaming agent, a solvent, a preservative, a stabilizer, a synergist or a carrier;

[0015] Furthermore, the wetting agent is one or more of alkylbenzene sulfonate, alkylnaphthalene sulfonate, lignin sulfonate, sodium lauryl sulfate, sodium dioctyl sulfosuccinate, α-olefin sulfonate, alkylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol ethoxylate, fatty alcohol ethoxylate, fatty alcohol polyoxyethylene ether sodium sulfate, silkworm feces, soapberry powder, soapberry powder, SOPA, detergent, emulsifier 2000 series and wetting penetrant F; and / or

[0016] Furthermore, the dispersant is one or more of lignin sulfonate, alkylnaphthalene sulfonate formaldehyde condensate, naphthalene sulfonate, tristyrylphenol ethoxylate phosphate, fatty alcohol ethoxylate, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene ether methyl ether condensate sulfate, fatty amine polyoxyethylene ether, glycerol fatty acid ester polyoxyethylene ether, polycarboxylates, polyacrylic acids, phosphates, EO-PO block copolymers and EO-PO graft copolymers; and / or

[0017] Furthermore, the emulsifier is one or more of calcium dodecylbenzenesulfonate, alkylphenol formaldehyde resin polyoxyethylene ether, phenylethylphenol polyoxyethylene polyoxypropylene ether, fatty alcohol ethylene oxide-propylene oxide copolymer, styrylphenol polyoxyethylene ether, castor oil polyoxyethylene ether and alkylphenol ether phosphate; and / or

[0018] Furthermore, the thickener is one or more of sodium chloride, ammonium sulfate, ammonium chloride, xanthan gum, organic bentonite, gum arabic, starch, agar, hydroxymethyl cellulose, hydroxypropyl methyl cellulose, sodium alginate, magnesium aluminum silicate, organic bentonite, polyvinyl alcohol, carboxymethyl cellulose and white carbon black; and / or

[0019] Furthermore, the disintegrant is one or more of sodium sulfate, ammonium sulfate, aluminum chloride, sodium chloride, ammonium chloride, bentonite, glucose, sucrose, starch, cellulose, urea, sodium carbonate, sodium bicarbonate, citric acid and tartaric acid; and / or

[0020] Furthermore, the antifreeze is one or more of sodium nitrite, calcium nitrite, carbonate, calcium chloride, magnesium chloride, sodium acetate, methanol, ethanol, isopropanol, ethylene glycol, propylene glycol, glycerol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, polyethylene glycol, and urea; and / or

[0021] Furthermore, the defoaming agent is C 10 -C 20 Saturated fatty acid compounds, silicone oil, silicone compounds, C8-C 10 One or more of fatty alcohols; and / or

[0022] Furthermore, the preservative is one or more of propionic acid, sodium propionate, sorbic acid, sodium sorbate, potassium sorbate, benzoic acid, sodium benzoate, sodium p-hydroxybenzoate, methyl p-hydroxybenzoate, hydroquinone, kasone and isothiazolinone; and / or

[0023] Furthermore, the stabilizer is one or more of disodium hydrogen phosphate, oxalic acid, succinic acid, adipic acid, borax, 2,6-di-tert-butyl-p-cresol, triethanolamine oleate, epoxidized vegetable oil, kaolin, bentonite, attapulgite, white carbon black, talc, montmorillonite and starch; and / or

[0024] Furthermore, the synergist is selected from phosphine, piperonyl butoxide; and / or

[0025] Furthermore, the filler is a solvent, a filler or a carrier;

[0026] Furthermore, the solvent is one or more of benzene, toluene, xylene, durene, methanol, ethanol, isopropanol, n-butanol, dimethyl sulfoxide, dimethylformamide, cyclohexanone, alkylene carbonate, diesel, solvent oil, vegetable oil, vegetable oil derivatives and water; and / or

[0027] Furthermore, the carrier is one or more of ammonium salts, ground natural minerals, ground artificial minerals, silicates, resins, waxes, solid fertilizers, water, organic solvents, mineral oils, vegetable oils and vegetable oil derivatives.

[0028] Furthermore, the herbicidal composition can be prepared into an agriculturally acceptable formulation.

[0029] Furthermore, the dosage form is a soluble solution, a suspension, a water-dispersible granule, or a dispersible oil suspension.

[0030] Application of a herbicidal composition in controlling weeds in corn fields;

[0031] Furthermore, the cornfield weeds are annual or perennial weeds;

[0032] Further, the unwanted plants are annual and / or perennial weeds of the Poaceae, Leguminosae, Asteraceae, Rubiaceae, Scrophulariaceae, Solanaceae, Amaranthaceae, Caryophyllaceae, Cruciferae, Lamiaceae, Euphorbiaceae, Cyperaceae, Polygonaceae, Convolvulaceae, Boraginaceae, Commelinaceae, Malvaceae, and Chenopodiaceae families;

[0033] Furthermore, annual or perennial weeds such as wild oats Avena fatua, foxtail grass Alopecurus aequalis, bluegrass Poa annua, hard grass Selerochloa kengiana, beckmannia syzigachne, Polypogon fugax, brome grass Bromus japonicas, cleaver Galium aparine, euphorbia helioscopia, veronica persica, Malachium aquaticum, Sileneconoidea, Vaccaria segetalia, Descurainia Sophia, Thlaspiarvense, shepherd's purse Capsella bursa-pastoris, Lamium amplexicaule, Viciasativa, Calystegia hederacea, Cerastium viscosum, Stellariaalsine, Lithospermum arvense, Bothriospermum tenellum, Digitaria sanguinalis, Eleusine indica, Setaria viridis, Cyperus rotundus, Eclipta prostrata, Cephalanoplos segetum, Amaranthus retroflexus, Alternanthera philoxeroides, Protulacaoleracea, Solanum nigrum, Physalis angulata, Acalypha australis, Celosia argentea, Amaranthus spinosus, Xanthium sibiricum, Ageratum conyzoides, Commelina communis, Echinochloa crus-galli, Paspalum distichum, Alopecurus japonicus, Abutilon theophrasti, Chenopodium album, Rumexcrispus, Cassia tora, Stellariamedia, Cerastium arvense, Veronica didyma, Erigeron annuus, Vicia sativa, Arabidopsis thaliana, Cyperus iria, Cyperus difformis, Polygonum hydropiper, Leptochloa chinensis, Cynodon dacylon, Euphorbia maculata, Cuscuta chinensis, Lapsana apogonoides, Sonchus oleraceus, Lxeris chinensis, Imperata cylindrical, Conyza canadensis, Humulus scandens, Cayratia japonica, Conyza bonariensis, Artemisia argyi, Artemisia annua, Ixeris sonchifolia;

[0034] Furthermore, the weeds are Setaria viridis, Goosegrass, Solanum nigrum, and Cyperus rotundus;

[0035] Furthermore, the herbicidal composition is applied to the unwanted plants or their growth sites.

[0036] Beneficial effects of the present invention:

[0037] 1) The herbicidal composition of the present invention has a good weed control effect, has a significant synergistic effect, and greatly improves the herbicidal activity of the herbicide;

[0038] 2) The herbicidal composition of the present invention is applied to corn fields. Through the synergistic effect of different mechanisms of action, it has both soil and stem and leaf herbicidal activity, a long control period, a broad herbicidal spectrum, and a long lasting effect.

[0039] 3) The herbicidal composition of the present invention can reduce the application dosage of a single agent, reduce environmental pollution, and has high safety. Specific implementation plan

[0040] In order to better illustrate the present invention, the present invention is further described below in conjunction with embodiments.

[0041] Preparation Example 1:

[0042] 51% benzsulfamide, tembotrione, terbuthylazine water dispersible granules (6%+10%+35%)

[0043] Formula composition: 6% benzsulfamide, 10% tembotrione, 35% terbuthylazine, 4% polycarboxylate, 4% sodium lauryl sulfate, 1.5% sodium alkyl sulfonate, 3% white carbon black, and kaolin makes up the balance;

[0044] Preparation method: According to the formula ratio, the active ingredients are added to the carrier, and surfactants and other functional additives are added thereto, mixed, and after air flow grinding, appropriate water is added, and then the water-dispersible granule product is obtained by kneading, granulating, drying and screening.

[0045] Preparation Example 2:

[0046] 40% saflufenacil·tembotrione·terbuthylazine wettable powder (4%+11%+25%)

[0047] Formula composition: 4% benzsulfamide, 11% tembotrione, 25% terbuthylazine, 10% sodium dodecylbenzenesulfonate, 8% polycarboxylate, 5% white carbon black, and bentonite makes up the balance;

[0048] Preparation method: According to the formula ratio, the active ingredients, dispersants, wetting agents and fillers are mixed, stirred evenly in a stirring tank, and crushed and mixed evenly for multiple times in a jet mill to make a wettable powder product.

[0049] Preparation Example 3:

[0050] 41% saflufenacil·tembotrione·terbuthylazine suspension (3%+8%+30%)

[0051] Formula composition: 3% benzsulfamide, 8% tembotrione, 30% terbuthylazine, 3% fatty alcohol polyoxyethylene ether sulfate, 0.3% citric acid, 1.5% polycarboxylate, 3% sodium lauryl sulfate, 0.1% xanthan gum, 5% glycerin, 0.3% magnesium aluminum silicate, 0.5% silicone defoamer, and deionized water to make up the balance;

[0052] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reactor in sequence, oil is added and mixed evenly, and the mixture is subjected to high-speed shearing and wet sand grinding to a particle size of less than 5μm. Finally, the suspension product is obtained by homogenous filtration.

[0053] Preparation Example 4:

[0054] 30% benzsulfamide, tampron, terbuthylazine dispersible oil suspension (3% + 7% + 20%)

[0055] Formula composition: 3% benzsulfamide, 7% tembotrione, 20% terbuthylazine, 2% calcium dodecylbenzenesulfonate, 1.5% polycarboxylate, 0.5% citric acid, 18% fatty alcohol polyoxyethylene ether, 1.5% organic bentonite, and methyl oleate makes up the balance;

[0056] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reactor in sequence, oil is added and mixed evenly, and the mixture is subjected to high-speed shearing and sand grinding to a particle size of less than 5μm. Finally, the dispersible oil suspension is obtained by homogenous filtration.

[0057] Indoor activity test

[0058] Test basis: The test is based on NY / T 1155.4-2006 "Guidelines for Indoor Bioassay Tests of Pesticides - Herbicides Part 4: Activity Determination Test - Stem and Leaf Spray Method";

[0059] Test targets: Setaria viridis, Goosegrass, Solanum nigrum, Cyperus rotundus;

[0060] Instruments and equipment: light incubator, quantitative spray equipment, electronic balance, pots, pipettes, etc.;

[0061] Test soil: The test uses air-dried loam with an organic matter content of ≤3%, neutral pH, good air permeability, and sieved;

[0062] Test materials: Fill the test soil to 4 / 5 of the pot, and then use infiltration irrigation from the bottom of the pot to make the soil completely moist to saturation. Evenly sow the pre-treated test weed seeds on the soil surface, cover with 0.5cm to 2cm of soil according to the size of the seeds, and move them into the greenhouse for routine cultivation after sowing. Water the weeds by infiltration irrigation from the bottom of the pot. After the weeds emerge, thin out the seedlings and determine the number of plants to ensure a consistent density of weeds (total density of 120 plants / m 2 ), select test materials with appropriate leaf age for spraying treatment.

[0063] Preparation of the drug: Dissolve the above raw drugs in a suitable solvent, and then dilute with 0.1% Tween 80 aqueous solution;

[0064] Chemical treatment: Spray the stems and leaves with a range of low to high doses according to the experimental design. Each treatment was replicated four times, and a treatment without chemical was used as a blank control. After treatment, the chemical solution on the surface of the test material was allowed to air dry naturally, and then the material was moved to the greenhouse for conventional cultivation.

[0065] Experimental investigation: After treatment, the weed control effect of each treatment was observed regularly. After 14 days, the absolute value survey method was used to investigate the number of surviving weeds and calculate the control effect.

[0066] Calculation formula:

[0067] Plant control efficiency (E)% = (number of weeds in blank control - number of weeds in treated condition) / number of weeds in blank control × 100

[0068] Theoretical control effect of the mixture E0 = weed control effect of herbicide A at a dosage of P + weed control effect of herbicide B at a dosage of Q - (weed control effect of herbicide A at a dosage of P × weed control effect of herbicide B at a dosage of Q) / 100

[0069] Evaluation criteria for the combined effect of mixed drugs: E-E0>10% is synergistic effect, E-E0<-10% is antagonistic effect, and E-E0 between ±10% is synergistic effect.

[0070] Test results:

[0071] The results in Tables 1 to 4 show that saflufenacil, tembotrione, and terbuthylazine have good indoor activity against common weeds Setaria viridis, Goosegrass, Solanum nigrum, and Cyperus rotundus.

[0072] The mass ratios of benzylsulfuron, tembotrione and atrazine are 3+6+60, 3+6+90, 3+12+60, 3+12+90, 3+12+120, 3+18+60, 3+18+90, 3+18+120, 6+6+60, 6+6+90, 6+6+120, 6+12+60, 6+12+90, 6+12+12 0, 6+18+60, 6+18+90, 6+18+120, 12+6+60, 12+6+90, 12+6+120, 12+12+60, 12+12+90, 12+12+120, 12+18+60, 12+18+90, and 12+18+120 have synergistic effects on the prevention of Setaria viridis and Goosegrass.

[0073] The mass ratios of benzylsulfuron, tembotrione and atrazine are 3+6+60, 3+6+90, 3+6+120, 3+12+60, 3+12+90, 3+12+120, 3+18+60, 3+18+90, 3+18+120, 6+6+60, 6+6+90, 6+6+120, 6+12+60, 6+12+90 0, 6+12+120, 6+18+60, 6+18+90, 6+18+120, 12+6+60, 12+6+90, 12+6+120, 12+12+60, 12+12+90, 12+12+120, 12+18+90, and 12+18+120 had a synergistic effect on the prevention and control of Solanum nigrum and Cyperus rotundus.

[0074] Table 1 Combined effects of different herbicide mixtures on Setaria viridis

[0075]

[0076] Table 2 Combined effects of different herbicide mixtures on goosegrass

[0077]

[0078] Table 3 Combined effects of different herbicide mixtures on Solanum nigrum

[0079]

[0080] Table 4 Combined effects of different herbicide mixtures on Cyperus rotundus

[0081]

[0082] Field efficacy test:

[0083] Test reference: "Guidelines for Field Efficacy Tests of Pesticides" (GB / T17980.42-2004);

[0084] Test site: corn field in Xiaowenzhuang, Xiping County, Zhumadian City, Henan Province. The test plot is flat and has loam soil.

[0085] Crops: corn (Denghai 605);

[0086] Experimental design: The experimental plots were arranged in random blocks, with each plot covering an area of 49m 2 , each treatment was repeated 4 times, as shown in the following table:

[0087] Table 5 Different experimental agents and dosages

[0088]

[0089] Application method: When corn is in the 3-4 leaf stage, the weather is clear and the wind speed is less than 3m / s. Use an electric sprayer (FST-18 electric sprayer) to spray the stems and leaves of weeds, with a water consumption of 30L / 667m 2 .

[0090] Investigation method: Observe the safety of each pesticide treatment on crops 7 days after application to see if there is any pesticide damage. The control effect investigation adopts the 5-point method to take samples at fixed points in each plot, with each point 0.25m 2 Before spraying, the base number of weeds at the sampling site was surveyed. The number of weeds was then surveyed 15 and 30 days after spraying, and the fresh weight of weeds was surveyed 45 days after spraying. The control efficacy per plant and fresh weight of each treatment was calculated based on the survey results, and the significance of the differences in control efficacy among treatments was analyzed using DPS software.

[0091] Calculation method:

[0092] Plant control effect (%) = [(1-number of weeds in the control area before treatment × number of weeds in the treatment area after treatment) / (number of weeds in the control area after treatment × number of weeds in the treatment area before treatment)] × 100%

[0093] Fresh weight control effect = [(fresh weight of weeds in the control area - fresh weight of weeds in the treatment area / fresh weight of weeds in the control area] × 100%

[0094] Test results:

[0095] According to the observation of corn growth 7 days after application, the plant height, leaf color and growth of corn in each treatment area were normal, and no symptoms of pesticide damage appeared.

[0096] The control effect of each treatment on weeds is shown in Table 6. The herbicide combination of saflufenacil, tembotrione and terbuthylazine has an excellent control effect on weeds in corn fields.

[0097] 15 days after application, the total weed control efficacy of 51% saflufenacil·trimethylenetetrachloride·terbuthylazine water-dispersible granules (6%+10%+35%) and 30% saflufenacil·trimethylenetetrachloride·terbuthylazine dispersible oil suspension (3%+7%+20%) were 94.75% and 95.21%, respectively, which were significantly higher than other application treatments.

[0098] As time went by, 30 days after application, the herbicidal effects of 70% saflufenacil water-dispersible granules, 8% cyproconazole dispersible oil suspension, 75% terbuthylazine water-dispersible granules, and 23.5% cyproconazole·atrazine dispersible oil suspension (3.5+20%) were greatly reduced; however, the total herbicidal effects of 51% saflufenacil·cyproconazole·terbuthylazine water-dispersible granules (6%+10%+35%) and 30% saflufenacil·cyproconazole·terbuthylazine dispersible oil suspension (3%+7%+20%) were still above 95%.

[0099] Table 6 Effect of different test agents on weed control (per plant / %)

[0100]

[0101] The fresh weight control effect of each treatment on weeds is shown in Table 7. 45 days after application, the fresh weight control effects of 51% saflufenacil·trimethylenetetrachloride·terbuthylazine water dispersible granules (6%+10%+35%) and 30% saflufenacil·trimethylenetetrachloride·terbuthylazine dispersible oil suspension concentrate (3%+7%+20%) were 96.28% and 97.01%, respectively, showing strong persistent effect.

[0102] Table 7 Effect of different test agents on weed control (fresh weight control effect / %)

[0103]

[0104]

[0105] Note: The above protective effects (%) are the average values of each replicate; lowercase letters represent significant differences at the 5% level.

[0106] As can be seen from Table 8, the corn yield of 51% benzsulfamide·trimethylenetetrachlor·terbuthylazine water-dispersible granules (6%+10%+35%) and 30% benzsulfamide·trimethylenetetrachlor·terbuthylazine dispersible oil suspension concentrate (3%+7%+20%) was significantly higher than that of the three single application treatments and 23.5% trimethylenetetrachlor·atrazine dispersible oil suspension concentrate (3.5+20%). The corn yield of these two combination treatment areas was equivalent, increasing by 13.42% and 10.48% compared with the clear water control.

[0107] Table 8 Corn yield in different treatment areas

[0108]

[0109] In summary, the composition of the present invention adopts a combination of saflufenacil, tembotrione and terbuthylazine. Its activity and herbicidal effect are not a simple addition of the activities of each component. Compared with existing single formulations, it has significant control effects on plots with mixed infestations of various grass weeds and broadleaf weeds, can delay the development of weed resistance, has low pesticide residues, is safe, and meets the safety requirements of pesticide formulations.

[0110] Although the present invention has been described in detail above using general descriptions and specific implementation plans, it is obvious to those skilled in the art that some modifications or improvements can be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A herbicidal composition containing saflufenacil and tembotrione, characterized in that: The active ingredients of the herbicidal composition include active ingredient A, active ingredient B and active ingredient C, wherein the active ingredient A is saflufenacil, the active ingredient B is tembotrione, and the active ingredient C is terbuthylazine.

2. The herbicidal composition according to claim 1, characterized in that The mass ratio of the active ingredient A, the active ingredient B and the active ingredient C of the herbicidal composition is 0.5-20:1-30:10-200.

3. The herbicidal composition according to claim 1, wherein The mass ratio of saflufenacil, tembotrione and terbuthylazine is 3-12:6-18:60-120.

4. The herbicidal composition according to claim 1, characterized in that The mass percentage of the active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 1 to 90%; Preferably, the mass percentage of the active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 5 to 85%.

5. The herbicidal composition according to claim 1, characterized in that In addition to the active ingredients, the herbicidal composition also includes agriculturally acceptable auxiliary ingredients, which are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoaming agents, solvents, preservatives, stabilizers, synergists or carriers.

6. The herbicidal composition according to claim 1, characterized in that The herbicidal composition can be prepared into an agriculturally acceptable formulation.

7. The herbicidal composition according to claim 1, characterized in that The dosage forms include soluble solution, suspension, water-dispersible granules and dispersible oil suspension.

8. Use of the herbicidal composition according to claim 1 in controlling weeds in corn fields.

9. The use according to claim 8, characterized in that The cornfield weeds are annual or perennial weeds; Preferably, the weeds are Setaria viridis, Goosegrass, Solanum nigrum, and Cyperus rotundus.

10. The use according to claim 8, characterized in that The herbicidal composition is applied to the unwanted plants or the locus where they grow.

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