Herbicide compositions and their use

Abstract

The present application relates to a kind of herbicide composition with wide herbicidal spectrum and significant weed control effect and its application.The present application uses the combination of different structures of metrafenone, pendimethalin and sulfosulfuron, no chemical reaction occurs between the three compounds to cause drug nature change, also no drug efficacy offset and other side effects occur in application, on the contrary, it also has obvious synergistic effect, can more greatly improve the combination of composition on annual grass weeds and broadleaf weeds prevention effect.The composition can effectively delay the generation and development of weed resistance to single agent, and is safe to tolerant crops in addition to expanding the herbicidal spectrum of product.

Description

Technical Field

[0001] This invention relates to the field of herbicides, and more specifically to a herbicide composition and its application. Technical Background

[0002] Weeds in cornfields include barnyard grass, crabgrass, foxtail grass, thrush, purslane, lambsquarters, wild millet, cocklebur, black nightshade, goosegrass, reverse branch amaranth, knotweed, iron amaranth, nutgrass, and black nightshade, etc. Weeds compete with corn for water and fertilizer, and are one of the main factors affecting corn yield. If they are not controlled, they will cause a significant reduction in corn yield.

[0003] Chemical weed control is one of the main methods for controlling weeds in cornfields. However, using a single type of herbicide can easily lead to herbicide resistance in weeds. Furthermore, cornfields often have mixed occurrences of different types of weeds, requiring the use of different pesticides for each type. Combining different types of herbicides can broaden the weed control spectrum, improve effectiveness, delay the development of herbicide resistance in weeds, and save time and labor. Summary of the Invention

[0004] The purpose of this invention is to provide a herbicide composition with a broad spectrum of weed control and significant weed control effect, and its application.

[0005] During their research, the inventors of this invention unexpectedly discovered that combining sulfonylpyrazine, sulfosulfuron, and pendimethalin, which have different structural types and mechanisms of action, not only avoids drug antagonism or other side effects, but also has a significant synergistic effect. This can greatly enhance the control efficacy of these three components against annual grass and broadleaf weeds, while also expanding the weed control spectrum when these three components are used as single ingredients, and also ensuring high crop safety.

[0006] Therefore, the first object of the present invention is to provide a herbicide composition wherein the active ingredients of the herbicide composition contain sulfopyrazine, sulfadiazine and pendimethalin.

[0007] A second objective of this invention is to provide the application of the above-described herbicide composition in the control of annual and perennial grass and broadleaf weeds.

[0008] A third objective of this invention is to provide the application of the above-described herbicide composition in controlling annual and perennial grass and broadleaf weeds in cornfields.

[0009] Specifically, the herbicide composition provided by the present invention has the following advantages:

[0010] The herbicide composition provided by this invention exhibits excellent synergistic effects. The mixed composition significantly improves the herbicidal effect compared to its single agent and dual agent formulations, reduces the dosage of pesticides used, and thus reduces farmers' pesticide costs and the degree of environmental impact.

[0011] The herbicide composition provided by this invention expands the weed control spectrum of herbicides. Using the herbicide composition provided by this invention, multiple weeds can be controlled simultaneously. It is convenient and efficient to use, and has good control effects on annual and perennial grass weeds and broadleaf weeds.

[0012] The herbicide composition provided by this invention is a combination of herbicides with different mechanisms of action, which allows the herbicidal properties of each component to complement each other well, effectively delaying the development and progression of resistance in weeds to single herbicides.

[0013] Other features and advantages of the present invention will be described in detail in the following detailed description section. Detailed Implementation

[0014] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0015] The active ingredients of the herbicide composition provided by the present invention contain sulfonylpyrazine, sulfosulfuron-methyl, and pendimethalin.

[0016] In this invention, the active ingredients may contain sulfonylpyrazole, sulfonylsulfuron, and pendimethalin. However, considering further improvement in herbicidal activity, preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron, and pendimethalin is 1:0.01-3:0.3-60; more preferably, the weight ratio is 1:0.02-1.5:0.5-55; even more preferably, the weight ratio is 1:0.04-1.5:0.8-55; even more preferably, the weight ratio is 1:0.08-1.4:0.8-54; even more preferably, the weight ratio is 1:0.16-1.4:1.6-54; even more preferably, the weight ratio is 1:0.16-1.4:1.6-54. The weight ratio of pendimethalin is 1:0.2-1.4:0.8-54; more preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron, and pendimethalin is 1:0.3-1.4:0.8-54; even more preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron, and pendimethalin is 1:0.4-1.4:0.8-54; even more preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron, and pendimethalin is 1:0.6- 1.4:1.6-54; more preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron and pendimethalin is 1:0.8-1.4:6.6-54; more preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron and pendimethalin is 1:0.8-1.4:13.3-54; more preferably, the weight ratio of sulfonylpyrazole, sulfonylsulfuron and pendimethalin is 1:0.8-1.4:26.6-54.

[0017] Specific examples of the weight ratios of sulfonylpyrazol, sulfadiazine, and pendimethalin include: 7.5:1.25:50, 7.5:1.25:100, 7.5:1.25:200, 7.5:1.25:400, 7.5:2.5:50, 7.5:2.5:100, 7.5:2.5:200, 7.5:2.5:400, 7.5:5:50, 7.5:5:100, 7.5:5:200, 7.5:5:400, and 7.5:10. :50, 7.5:10:100, 7.5:10:200, 7.5:10:400, 15:1.25:50, 15:1.25:100, 15:1.25:200, 15:1.25:400, 15:2.5:50, 15:2.5:100, 15:2.5:200, 15:2.5:400, 15:5:50, 15:5:100, 15:5:200, 15:5:400, 15:10:50, 15:10: 100, 15:10:200, 15:10:400, 30:1.25:50, 30:1.25:100, 30:1.25:200, 30:1.25:400, 30:2.5:50, 30:2.5:100, 30:2.5:200, 30:2.5:400, 30:5:50, 30:5:100, 30:5:200, 30:5:400, 30:10:50, 30:10:100, 30:10:20 0, 30:10:400, 60:1.25:50, 60:1.25:100, 60:1.25:200, 60:1.25:400, 60:2.5:50, 60:2.5:100, 60:2.5:200, 60:2.5:400, 60:5:50, 60:5:100, 60:5:200, 60:5:400, 60:10:50, 60:10:100, 60:10:200, 60:10:400, etc.

[0018] Considering the herbicidal activity against grassy weeds, the preferred weight ratios of sulfonylpyrrolidone, sulfosulfuron-methyl, and pendimethalin are 60:5:200, 7.5:5:400, 60:5:100, 60:5:400, 60:10:100, 60:2.5:200, 7.5:1.25:100, 60:2.5:100, 7.5:1.25:50, 15:5:400, 60:10:200, 30:10:100, 60:10:50, 15:1.25:50, 15:2.5:400, 30:1.25:400, 15:2.5:50, 30:5:100, and 7.5:10:50.

[0019] Considering the herbicidal activity against broadleaf weeds, the preferred weight ratios of sulfonylpyrrolidone, sulfosulfuron, and pendimethalin are 30:1.25:100, 15:5:50, 15:10:50, 7.5:10:400, 15:5:200, 60:2.5:100, 60:10:200, 30:1.25:50, 60:2.5:50, 7.5:1.25:200, 15:1.25:400, 30:2.5:200, and 60:5:100.

[0020] In the herbicide composition of the present invention, the content of the active ingredient in the herbicide composition can vary within a wide range. Specifically, the content of the active ingredient in the composition is 1-95% by weight, preferably 5-80% by weight, and more preferably 6-60% by weight.

[0021] Specific examples of the content of the active ingredient in the composition may include: 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%, 35 wt%, 36 wt%, 37 wt%, 38 wt%, 39 wt%, 40 wt%, 41 wt%, 42 wt%, 43 wt%, 44 wt%, 45 wt%, 46 wt%, 47 wt%, and 48 wt%. 49 wt%, 50 wt%, 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, 60 wt%, 61 wt%, 62 wt%, 63 wt%, 64 wt%, 65 wt%, 66 wt%, 67 wt%, 68 wt%, 69 wt%, 70 wt%, 71 wt%, 72 wt%, 73 wt%, 7 4 wt%, 75 wt%, 76 wt%, 77 wt%, 78 wt%, 79 wt%, 80 wt%, 81 wt%, 82 wt%, 83 wt%, 84 wt%, 85 wt%, 86 wt%, 87 wt%, 88 wt%, 89 wt%, 90 wt%, 91 wt%, 92 wt%, 93 wt%, 94 wt%, 95 wt%, etc., and the range of values ​​formed by any two of them.

[0022] In addition to the active ingredient, the herbicide composition of the present invention typically contains a pesticide-acceptable surfactant and carrier.

[0023] The surfactants mentioned above can be various surfactants known in the field of pesticide formulation, and the present invention is preferably one or more of emulsifiers, dispersants and wetting agents.

[0024] Other carriers besides the surfactants mentioned above can be various carriers known in the field of pesticide formulation, including various silicates, carbonates, sulfates, oxides, phosphates, plant carriers, and synthetic carriers. Specifically, for example, the carrier can be one or more of the following: silica, kaolin, diatomaceous earth, clay, talc, organobentonite, pumice, titanium dioxide, dextrin, cellulose powder, light calcium carbonate, soluble starch, corn starch, sawdust, urea, amine fertilizer, a mixture of urea and amine fertilizer, glucose, maltose, sucrose, anhydrous potassium carbonate, anhydrous sodium carbonate, anhydrous potassium bicarbonate, anhydrous sodium bicarbonate, attapulgite, a mixture of anhydrous potassium carbonate and anhydrous potassium bicarbonate, and a mixture of anhydrous sodium carbonate and anhydrous sodium bicarbonate.

[0025] The emulsifier mentioned above can be any emulsifier known in the field of pesticide formulation. Specifically, the emulsifier can be one or more of the following: calcium dodecylbenzenesulfonate, triphenylethylphenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, fatty amine, ethylene oxide adduct of fatty amide, fatty acid polyoxyethylene ester, rosin acid ethylene oxide adduct, polyol fatty acid ester and its ethylene oxide adduct, styrene-phenyl polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, hydroxyl-terminated polyoxyethylene polyoxypropylene ether, styrene-phenol formaldehyde resin, polyoxyethylene polyoxypropylene ether, and castor oil polyoxyethylene ether.

[0026] The dispersant mentioned above can be any dispersant known in the field of pesticide formulation. Specifically, the dispersant can be one or more of the following: sodium salt of acrylic acid homopolymer, disodium salt of maleate, sodium salt of naphthalene sulfonate formaldehyde condensate, rosin block polyoxyethylene ether polyoxypropylene ether sulfonate, hydroxyl-terminated polyoxyethylene polyoxypropylene ether block copolymer, triphenylethylphenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether phosphate, sodium salt of p-hydroxyphenyl lignin sulfonate, and calcium lignin sulfonate.

[0027] The aforementioned wetting agent can be any wetting agent known in the field of pesticide formulation. Specifically, the wetting agent can be one or more of sodium dodecyl sulfate, sodium secondary alkyl sulfate, sodium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether, alkyl naphthalene sulfonate, and alkylphenol resin polyoxyethylene ether sulfate.

[0028] The herbicide composition of the present invention may also contain various formulation adjuvants commonly used in the field of pesticide formulation. Specifically, the formulation adjuvant may be one or more of solvents, cosolvents, thickeners, antifreeze agents, encapsulating materials, protectants, defoamers, disintegrants, stabilizers, preservatives, and binders.

[0029] The solvents mentioned above can be various solvents known in the field of pesticide formulations. Specifically, the solvent can be one or more of organic solvents, vegetable oils, mineral oils, solvent oils, and water.

[0030] The organic solvent includes one or more of N-methylpyrrolidone, tetrahydrofuran, dimethyl sulfoxide, N,N-dimethyldecylamide, N,N-dimethylformamide, trimethylbenzene, tetramethylbenzene, xylene, toluene, octane, heptane, methanol, isopropanol, n-butanol, tetrahydrofurfuryl alcohol, tributyl phosphate, 1,4-dioxane, and cyclohexanone.

[0031] The vegetable oils include one or more of the following: methylated vegetable oil, rosin-based vegetable oil, turpentine oil, epoxidized soybean oil, soybean oil, peanut oil, rapeseed oil, flaxseed oil, castor oil, corn oil, and pine nut oil.

[0032] The mineral oil includes one or more of liquid wax, engine oil, kerosene, and lubricating oil.

[0033] In addition, the above solvents can also be used as cosolvents.

[0034] The antifreeze agent mentioned above can be any antifreeze agent known in the field of pesticide formulation, and the present invention preferably includes one or more of ethylene glycol, propylene glycol, glycerin and urea.

[0035] The aforementioned thickener can be any thickener known in the field of pesticide formulation. Specifically, the thickener can be one or more of xanthan gum, polyvinyl alcohol, polyacryl alcohol, polyethylene glycol, silica, diatomaceous earth, kaolin, clay, sodium alginate, magnesium aluminum silicate, sodium aluminum silicate, carboxymethyl cellulose, sodium hydroxypropyl cellulose, and organobentonite.

[0036] The aforementioned encapsulating material can be any of the encapsulating materials known in the field of pesticide formulations, and the present invention preferably uses polyurethane, polyurea, or urea-formaldehyde resin.

[0037] The aforementioned protective agent can be any of the protective agents known in the field of pesticide formulation, and the present invention preferably uses polyvinyl alcohol and / or polyethylene glycol.

[0038] The defoamer mentioned above can be any defoamer known in the field of pesticide formulations. The present invention preferably includes one or more of organosiloxanes, tributyl phosphate and silicones.

[0039] The stabilizer is selected from one or more of triphenyl phosphite, epichlorohydrin, and acetic anhydride.

[0040] The above-mentioned preservatives are selected from one or more of benzoic acid, sodium benzoate, 1,2-benzisothiazolin-3-one (BIT), Kathon and potassium sorbate.

[0041] According to the present invention, the formulation of the herbicide composition can be any of the formulations commonly used in the art, such as emulsifiable concentrates, water-in-oil emulsions, aqueous suspensions, oil suspensions, suspension emulsions, dispersible oil suspensions, wettable powders, soluble powders, water-dispersible granules, or soluble granules. Wettable powders are preferred. All of the above formulations can be prepared by conventional methods in the art.

[0042] In a preferred embodiment, the emulsifiable concentrate formulation comprises, by weight percentage, 1-95% active ingredient, 0-20% cosolvent, 1-30% emulsifier, and solvent to make up to 100%.

[0043] The preparation method of the above-mentioned emulsifiable concentrate formulation may include, for example, mixing and stirring the active components, solvent, cosolvent and emulsifier to form a uniform and transparent oil phase, thereby obtaining the emulsifiable concentrate formulation.

[0044] In a preferred embodiment, the emulsifiable concentrate formulation comprises, by weight percentage, 1-95% active ingredient, 0-20% cosolvent, 1-30% emulsifier, and solvent to make up to 100%.

[0045] The preparation method of the above-mentioned emulsifiable concentrate formulation may include, for example, mixing and stirring the active components, solvent, cosolvent and emulsifier to form a uniform and transparent oil phase, thereby obtaining the emulsifiable concentrate formulation.

[0046] In a preferred embodiment, the water-based emulsion or microemulsion comprises, by weight percentage, 1-95% active ingredient, 1-30% emulsifier, 0-30% cosolvent, 1-30% solvent, 0-10% antifreeze, 0-10% thickener, and water to make up to 100%.

[0047] In a preferred embodiment, the method for preparing the water-in-oil emulsion may include, for example, mixing the active ingredient, emulsifier, cosolvent, and solvent to form a homogeneous oil phase; and mixing water, thickener, antifreeze, etc., to form a homogeneous aqueous phase. Under high-speed shearing, the aqueous phase is added to the oil phase or the oil phase is added to the aqueous phase to form a well-dispersible water-in-oil emulsion.

[0048] In a preferred embodiment, the microemulsion is prepared by mixing and stirring the active ingredient, emulsifier, and solvent to form a homogeneous and transparent oil phase. Under stirring conditions, water is gradually added to form a homogeneous and transparent microemulsion.

[0049] In a preferred embodiment, the aqueous suspension comprises, by weight percentage, 1-95% active ingredient, 1-30% surfactant, 1-10% antifreeze, 0.1-5% thickener, and water to make up to 100%.

[0050] In a preferred embodiment, the oil suspension comprises, by weight percentage, 1-95% active ingredient, 1-30% emulsifier, 0.1%-10% dispersant, 0.1-5% thickener, and oil to make up to 100%.

[0051] Preparation method of water / oil suspension: Using water or oil as the medium, the active component, surfactant, and additives are added to a sand mill and ground to a certain particle size, then filtered. A metered thickener is then added to the ground mother liquor and sheared to disperse it evenly. This produces an oil suspension or water suspension.

[0052] In a preferred embodiment, the soluble granules, soluble powders, water-dispersible granules, or wettable powders are composed of 1-95% active ingredient, 1-30% surfactant, and other carriers to make up to 100% by weight.

[0053] The preparation method of water-dispersible granules and soluble granules is as follows: the active components, dispersant, wetting agent and carrier are mixed evenly, then pulverized to a certain particle size by airflow, water is added and kneaded, and finally added to a granulator for granulation. After drying, water-dispersible granules or soluble granules can be obtained.

[0054] The preparation method of soluble powder and wettable powder is as follows: fully mix each active component, various additives and other carriers and fillers, and pulverize them with an ultrafine pulverizer.

[0055] In a preferred embodiment, the microcapsule suspension comprises, by weight percentage, 1-95% active ingredient, 1-30% solvent, 0.1-5.0% protective agent, 0.05-1.0% defoamer, 1-30% encapsulation material, 1-30% dispersant, 0-30% wetting agent, 0-10% antifreeze, 0.1-5% thickener, and water to make up to 100%.

[0056] Preparation method: Mix the solvent and encapsulation material, then add the active ingredient; then add it to a mixture of protectant, antifreeze, defoamer and water for emulsification, and stir until the polymerization reaction is complete; then add thickener, dispersant and wetting agent to obtain a stable microcapsule suspension.

[0057] The present invention also provides the application of the above-described herbicide composition in the control of annual grass and broadleaf weeds.

[0058] The present invention also provides the application of the above-mentioned herbicide composition in controlling annual grass and broadleaf weeds in corn fields.

[0059] The aforementioned weeds may be one or more of the following: crabgrass, foxtail grass, annual bluegrass, barnyard grass, goosegrass, gray clover, angelica sinensis, black nightshade, amaranth, lambsquarters, and amaranth; preferably one or more of the following: crabgrass, foxtail grass, barnyard grass, goosegrass, amaranth, and lambsquarters; more preferably one or more of the following: crabgrass, foxtail grass, amaranth, and lambsquarters.

[0060] In particular, the inventors of this invention have unexpectedly discovered that the herbicide composition provided by this invention has extremely significant control effects on crabgrass, foxtail, amaranth, and lambsquarters, and is also highly safe for crops (e.g., corn).

[0061] The herbicide composition of the present invention can be provided in the form of a finished formulation, i.e., the substances in the composition have been mixed; or it can be provided in the form of a separate formulation, which can be mixed in a bucket or can before use and selectively diluted with water according to the desired concentration of active substances.

[0062] The compositions of the present invention can also be used in combination with other compounds having bactericidal, insecticidal or herbicidal properties, or in combination with nematicides, protective agents, growth regulators, plant nutrients or soil conditioners.

[0063] According to the present invention, the specific application method of the herbicide composition is generally to apply the herbicide composition of the present invention to the crop and the crop growing area using conventional methods before weed germination. The application method is soil sealing, which is simple. The herbicide composition of the present invention is preferably applied as a pre-emergence soil sealing treatment after sowing to control weeds that have not yet emerged. The application rate of the herbicide composition provided by the present invention depends on weather conditions or crop status, and is generally based on an active ingredient content of 20-2500 g / hm². 2 The preferred application concentration is 50-2000 g / hm. 2 The concentration at which the herbicide composition is applied is also related to external factors such as climate.

[0064] The herbicide composition provided by this invention can mitigate the effects of climate by using appropriate formulations.

[0065] The present invention will be further described below through specific embodiments, but the present invention is not limited to the following embodiments.

[0066] In the following test and preparation examples, sulfadiazine was purchased from Shanghai Qunli Chemical Co., Ltd. (purity 98 wt%); pendimethalin was purchased from Hebei Wanquanli Huahua Chemical Co., Ltd. (purity 95 wt%); and sulfadiazine was purchased from Corteva Agricultural Technology Co., Ltd. (purity 99 wt%).

[0067] In the following examples, preparation examples and test examples, the amount of active ingredient used is the actual amount used, that is, the amount after deducting impurities.

[0068] Example 1

[0069] The combined effects of sulfonylpyrazosulfuron, sulfonylsulfuron, and pendimethalin on common grass and broadleaf weeds will be illustrated below through indoor toxicity tests.

[0070] Preparation of test reagents: Sulfonazole technical and pendimethalin technical were dissolved in an appropriate amount of acetone, and then prepared into the required concentrations with 0.1% by weight Tween 80 aqueous solution.

[0071] Sulfadiazine technical grade is dissolved in an appropriate amount of dimethyl sulfoxide, and then prepared into the required concentration with 0.1% by weight Tween 80 aqueous solution for later use.

[0072] Experimental Methods: The experiment employed a greenhouse pot method. Seeds of foxtail grass (a grassy weed), crabgrass (a grassy weed), amaranth (a broadleaf weed), and lambsquarters (a broadleaf weed) were sown in small pots filled with 3 / 5 potting soil (field soil: nutrient soil: vermiculite = 3:1:1), with 6×6 seeds sown per pot. After sowing, the seeds were covered with 1–2 mm of soil. Water was added to a tray containing the small pots, and after the soil was completely moistened, the excess water was poured out. 24 hours after sowing, the soil was sprayed using an ASS-5 mobile sprayer. A blank control of clean water was provided. The plants were then transferred to a greenhouse for further cultivation and observation. The aboveground fresh weight of the weeds was measured after 20 days. Watering was carried out regularly to maintain soil moisture, except for 1–2 days after spraying.

[0073] Method for calculating the fresh weight percentage of weeds:

[0074]

[0075] Data statistical analysis methods:

[0076] The herbicidal activity of the herbicides was tested using the Colby method, i.e., E0 = ABC / 10000; where A is the single-agent weed fresh weight percentage of herbicide 1 (sulfonylpyrazol), B is the single-agent weed fresh weight percentage of herbicide 2 (sulfamethoxam), C is the single-agent weed fresh weight percentage of herbicide 3 (pentylene), E0 is the theoretical weed fresh weight percentage of the herbicide mixture, and E is the measured weed fresh weight percentage of the herbicide mixture. According to the Colby method, when E0 - E > 10%, it indicates that the herbicide mixture has a synergistic effect; when E0 - E < -10%, it indicates that the herbicide mixture has an antagonistic effect; and when the E0 - E value is within ±10%, it indicates that the herbicide mixture has an additive effect.

[0077] The following tests were performed respectively: (Results are shown in Table 1 and Table 2)

[0078] The combined effects of sulfonylpyrazine, sulfonylsulfuron-methyl, and pendimethalin on grass weeds were tested, and the ratios and results are shown in Table 1.

[0079] The combined effects of sulfonylpyrazine, sulfonylsulfuron-methyl, and pendimethalin on broadleaf weeds were tested, and the ratios and results are shown in Table 2.

[0080] Table 1

[0081]

[0082]

[0083] The results in Table 1 show that the combination of sulfonylpyrazole, sulfosulfuron-methyl, and pendimethalin, at the given dosage, exhibits a significant synergistic effect on the grass weeds foxtail and crabgrass. Furthermore, the synergistic effect is more significant when the weight ratios of sulfonylpyrazol, sulfosulfuron, and pendimethalin are 60:5:200, 7.5:5:400, 60:5:100, 60:5:400, 60:10:100, 60:2.5:200, 7.5:1.25:100, 60:2.5:100, 7.5:1.25:50, 15:5:400, 60:10:200, 30:10:100, 60:10:50, 15:1.25:50, 15:2.5:400, 30:1.25:400, 15:2.5:50, 30:5:100, or 7.5:10:50.

[0084] Table 2

[0085]

[0086]

[0087] The results in Table 2 show that the combination of sulfonylpyrazole, sulfosulfuron, and pendimethalin exhibits a significant synergistic effect against both broadleaf weeds *Amaranthus retroflexus* and *Chenopodium album*. Furthermore, the synergistic effect is more pronounced when the preferred weight ratios of sulfonylpyrazole, sulfosulfuron, and pendimethalin are 30:1.25:100, 15:5:50, 15:10:50, 7.5:10:400, 15:5:200, 60:2.5:100, 60:10:200, 30:1.25:50, 60:2.5:50, 7.5:1.25:200, 15:1.25:400, 30:2.5:200, or 60:5:100.

[0088] Formulation Example 1

[0089] 60% by weight of sulfonylpyrazole, sulfadiazine and pendimethalin water-dispersible granules: sulfonylpyrazole 5% by weight, pendimethalin 50% by weight, sulfadiazine 5% by weight, sodium naphthalenesulfonate formaldehyde condensate 5% by weight, sodium dodecyl sulfate 5% by weight, ammonium sulfate 5% by weight, kaolin to make up to 100% by weight.

[0090] The preparation method is as follows: According to the above formula, the three active components, additives and solid carrier are mixed and then subjected to air jet milling. After milling, they are mixed again, moistened with water, granulated by extrusion granulator, and then dried. During the drying process, the temperature is controlled to be less than or equal to 52°C. After sieving, a granular mixture with a particle size of 200 micrometers to 5000 micrometers is obtained. This mixture is 60% by weight of sulfonium pyrazosulfuron, sulfonium sulfadiazine and pendimethalin water dispersible granules.

[0091] Formulation Example 2

[0092] 30% by weight of sulfonylpyrazole, sulfadiazine and pendimethalin water-dispersible granules: sulfonylpyrazole 3% by weight, pendimethalin 26% by weight, sulfadiazine 1% by weight, disodium polymaleic anhydride 3% by weight, sodium diisopropylnaphthalenesulfonate 5% by weight, soluble starch 5% by weight, sodium sulfate monohydrate 5% by weight, kaolin to make up to 100% by weight.

[0093] The preparation method is as follows: According to the above formula, the three active components, additives and solid carrier are mixed and then subjected to air jet milling. After milling, they are mixed again, moistened with water, granulated by extrusion granulator, and then dried. During the drying process, the temperature is controlled to be less than or equal to 52°C. After sieving, a granular mixture with a particle size of 200 micrometers to 5000 micrometers is obtained. This mixture is 30% by weight of sulfonium pyrazosulfuron, sulfonium sulfadiazine and pendimethalin water dispersible granules.

[0094] Formulation Example 3

[0095] 70% by weight sulfonylpyrazole, sulfonylsulfuron and pendimethalin wettable powder: sulfonylpyrazole 20% by weight, pendimethalin 45% by weight, sulfonylsulfuron 5% by weight, sodium alkyl sulfonate 5% by weight, sodium naphthalene sulfonate formaldehyde condensate 5% by weight, sodium trimethylpentene copolymer 3% by weight, silica 3% by weight, kaolin to 100% by weight.

[0096] The preparation method is as follows: According to the above formula, the three active components, additives and solid carrier are mixed and stirred evenly, and the mixture with a particle size ≤44 micrometers is obtained by air jet milling. The mixture is 70% by weight of sulfonylpyrazol, sulfonylsulfuron and pendimethalin wettable powder.

[0097] Formulation Example 4

[0098] 41% by weight of sulfonylpyrazole, sulfonylsulfuron and pendimethalin wettable powder: sulfonylpyrazole 5% by weight, pendimethalin 35% by weight, sulfonylsulfuron 1% by weight, sodium naphthalenesulfonate formaldehyde condensate 5% by weight, sodium polymethacrylate 5% by weight, sodium dodecyl sulfate 3% by weight, silica 3% by weight, diatomaceous earth 10% by weight, kaolin to make up to 100% by weight.

[0099] The preparation method is as follows: According to the above formula, the three active components, additives and solid carrier are mixed and stirred evenly, and the mixture with a particle size ≤44 micrometers is obtained by air jet milling. The mixture is 41% by weight of sulfonylpyrazol, sulfonylsulfuron and pendimethalin wettable powder.

[0100] Formulation Example 5

[0101] 12% by weight of sulfonylpyrazole, sulfadiazine and pendimethalin dispersible oil suspension: sulfonylpyrazole 1% by weight, pendimethalin 10% by weight, sulfadiazine 1% by weight, silica 4% by weight, aromatic solvent oil 15% by weight, alkylphenol polyoxyethylene ether 5% by weight, fatty acid polyoxyethylene ester 5% by weight, fatty alcohol polyoxyethylene ether 2% by weight, methoxyacrylic acid copolymer 5% by weight, polyoxyethylene polyoxypropylene block polyether 5% by weight, emulsified silicone oil 2% by weight, methylated soybean oil to 100% by weight.

[0102] The preparation method is as follows: Dimethyl pendimethalin is mixed with aromatic hydrocarbon solvent oil, heated and dissolved, and then alkylphenol polyoxyethylene ether is added. After mixing evenly, it is used as the dimethyl pendimethalin mother liquor for later use. Methyl esterified soybean oil, sulfonium pyrazolium, sulfonium sulfadiazine and other adjuvants and fillers are added to the reactor mixer and stirred evenly. The material is then injected into a multi-stage sand mill for grinding. After grinding, the fineness of the material is 98% passing through 1-5μm and then discharged. The material is transferred to a high-shear emulsification reactor, and the dimethyl pendimethalin mother liquor is slowly added. After shearing evenly, a 10% by weight dispersible oil suspension of sulfonium pyrazolium, sulfonium sulfadiazine and dimethyl pendimethalin can be prepared.

[0103] Formulation Example 6

[0104] 19% by weight of sulfonylpyrazole, sulfonylsulfuron and pendimethalin dispersible oil suspension: sulfonylpyrazole 3% by weight, pendimethalin 15% by weight, sulfonylsulfuron 1% by weight, alkylphenol polyoxyethylene ether 6% by weight, fatty acid polyoxyethylene ester 5% by weight, silica 4% by weight, fatty alcohol polyoxyethylene ether 3% by weight, methoxyacrylic acid copolymer 5% by weight, aromatic hydrocarbon solvent oil 15% by weight, polyoxyethylene polyoxypropylene block polyether 5% by weight, emulsified silicone oil 2% by weight, methylated soybean oil to 100% by weight.

[0105] The preparation method is as follows: Dimethyl pendimethalin is mixed with aromatic hydrocarbon solvent oil, heated and dissolved, and then alkylphenol polyoxyethylene ether is added. After mixing evenly, it is used as the dimethyl pendimethalin mother liquor for later use. Methyl esterified soybean oil, sulfonium pyrazolium, sulfonium sulfadiazine, and other adjuvants and fillers are added to the reactor mixer and stirred evenly. The material is then injected into a multi-stage sand mill for grinding. After grinding, the fineness of the material is 98% passing through 1-5μm and then discharged. The material is transferred to a high-shear emulsification reactor, and the dimethyl pendimethalin mother liquor is slowly added. After shearing evenly, a 19% by weight dispersible oil suspension of sulfonium pyrazolium, sulfonium sulfadiazine, and dimethyl pendimethalin can be prepared.

[0106] Test Example 1

[0107] Test reagents:

[0108] The formulation obtained through steps 1-6;

[0109] 18% sulfonylpyrazole SC (18% sulfonylpyrazole SC): Add 18.6g of sulfonylpyrazole technical material, 5g of sodium lignosulfonate, 3g of sodium dodecyl sulfate, 6g of 1,2-propanediol, 0.5g of organosilicon defoamer, and water to a shearing kettle. Shear evenly and then grind finely in a sand mill and filter to obtain the final product.

[0110] 33% Pendimethalin EC (33% Pendimethalin EC): Registration No.: PD20094188, purchased from Shenyang Kechuang Chemicals Co., Ltd.;

[0111] 25% sulfadiazine WG (25% sulfadiazine WG): Registration No.: PD20040019, purchased from Corteva AgroSciences Ltd.

[0112] Test method:

[0113] Experimental Methods: The experiment employed a greenhouse pot method. Seeds of foxtail grass (a grassy weed), crabgrass (a grassy weed), amaranth (a broadleaf weed), and lambsquarters (a broadleaf weed) were sown in small pots filled with 3 / 5 potting soil (field soil: nutrient soil: vermiculite = 3:1:1), with 6×6 seeds sown per pot. After sowing, the seeds were covered with 1–2 mm of soil. Water was added to a tray containing the small pots, and after the nutrient soil was completely moistened, the excess water was poured out. 24 hours after sowing, the soil was sprayed using an ASS-5 mobile sprayer. A water treatment was used as a blank control. The plants were then transferred to a greenhouse for further observation. The weed control effect of each treatment was assessed after 20 days. Except for 1–2 days after spraying, regular watering was maintained to keep the soil moist.

[0114] Method for calculating weed control effectiveness:

[0115]

[0116] The test results are shown in Table 3.

[0117] Table 3

[0118]

[0119] As shown in Table 3, the combination of sulfonium pyrazosulfuron, sulfonium sulfadiazine, and pendimethalin exhibits excellent control effects against grass weeds such as foxtail grass, barnyardgrass, and broadleaf weeds such as amaranth and lambsquarters.

[0120] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A herbicide composition, characterized in that, The active ingredients of the herbicide composition include sulfonylpyrazine, sulfosulfuron-methyl, and pendimethalin, with the weight ratio of sulfonylpyrazine, sulfosulfuron-methyl, and pendimethalin being 1:0.01-3:0.3-60. The content of the active ingredients in the herbicide composition is 1-95% by weight.

2. The composition according to claim 1, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl, and pendimethalin is 1:0.02-1.5:0.5-55.

3. The composition according to claim 2, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl, and pendimethalin is 1:0.04-1.5:0.8-55.

4. The composition according to claim 3, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl and pendimethalin is 1:0.08-1.4:0.8-54.

5. The composition according to claim 4, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl and pendimethalin is 1:0.16-1.4:1.6-54.

6. The composition according to claim 5, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl, and pendimethalin is 1:0.2-1.4:0.8-54.

7. The composition according to claim 6, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl and pendimethalin is 1:0.3-1.4:0.8-54.

8. The composition according to claim 7, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl, and pendimethalin is 1:0.4-1.4:0.8-54.

9. The composition according to claim 8, wherein, The weight ratio of sulfonylpyrazine, sulfadiazine, and pendimethalin is 1:

1. 0.6-1.4：1.6-54。 10. The composition according to claim 9, wherein, The weight ratio of sulfonylpyrazol, sulfonylsulfuron, and pendimethalin is 1:0.8-1.4:6.6-54.

11. The composition according to claim 10, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl and pendimethalin is 1:0.8-1.4:13.3-54.

12. The composition according to claim 11, wherein, The weight ratio of sulfonylpyrazine, sulfonylsulfuron-methyl and pendimethalin is 1:0.8-1.4:26.6-54.

13. The composition according to claim 1, wherein, The weight ratios of sulfonylpyrazol, sulfadiazine, and pendimethalin are 7.5:1.25:50, 7.5:1.25:100, 7.5:1.25:200, 7.5:1.25:400, 7.5:2.5:50, 7.5:2.5:100, 7.5:2.5:200, 7.5:2.5:400, 7.5:5:50, 7.5:5:100, 7.5:5:200, 7.5:5:400, 7.5:10:50, 7.5:10:100, 7.5:10:200, 7.5:10:400, and 15:1.25:

50. 15:1.25:100, 15:1.25:200, 15:1.25:400, 15:2.5:50, 15:5:50, 15:10:50, 30:1.25:50, 30:1.25:100, 30:1.25:200, 30:1.25:400, 30:2.5:50, 30:5:50, 30:10:50, 60:1.25:50, 60:1.25:100, 60:1.25:200, 60:1.25:400, 60:2.5:50, 60:5:50 or 60:10:

50.

14. The herbicide composition according to claim 13, wherein, The herbicide composition contains 5-80% by weight of the active ingredient.

15. The herbicide composition according to any one of claims 1-14, wherein, The herbicide composition also includes a pesticide-acceptable surfactant and carrier.

16. The herbicide composition according to claim 15, wherein, The herbicide composition is formulated as an emulsifiable concentrate, water emulsion, aqueous suspension, oil suspension, suspension emulsion, dispersible oil suspension, wettable powder, soluble powder, water-dispersible granules, or soluble granules.

17. The use of the herbicide composition according to any one of claims 1-16 in controlling annual and perennial grass and broadleaf weeds; wherein the weeds are one or more of crabgrass, foxtail, amaranth, and lambsquarters.

18. The use of the herbicide composition according to any one of claims 1-16 in controlling annual and perennial grasses and broadleaf weeds in corn fields; wherein the weeds are one or more of crabgrass, foxtail, amaranth, and lambsquarters.

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