Herbicide compositions and their use

Abstract

The present application relates to the field of herbicides, and discloses a herbicide composition with a wide spectrum of weeds and a remarkable effect on weed control and application thereof.The active ingredient of the herbicide composition comprises furilazole, metribuzin and pendimethalin.The herbicide composition provided by the present application shows an excellent synergistic effect, reduces the use dose of pesticides, and thus reduces the use cost of pesticides for farmers and the influence degree on the environment.

Description

Technical Field

[0001] This invention belongs to the field of herbicides, specifically relating to a herbicide composition and its application. Background Technology

[0002] The long-term, excessive, and irrational use of herbicides has led to a significant decline in their control efficacy and the emergence of resistant weeds. Herbicide resistance has become a global challenge.

[0003] Generally speaking, the development of herbicide resistance in weeds occurs when some resistant weeds or herbicide-resistant genetic types are preserved and can reproduce to form a large population. For example, each foxtail grass plant can produce 700,000 seeds, enabling it to spread very effectively over large areas. In the field, due to the large-scale or long-term continuous use of one or the same type of herbicide, previously sensitive weeds become less sensitive to the herbicide, making it difficult to achieve control with conventional dosages.

[0004] Natural selection, under the selective pressure of herbicides, causes mutations or alterations in gene expression within weeds. This results in either increased herbicide detoxification capacity or decreased affinity between the herbicide and its action site, leading to herbicide-resistant mutants. As these resistant individuals reproduce and develop, large resistant populations eventually emerge. Long-term, high-volume, excessive, and singular use of herbicides inevitably leads to herbicide resistance in weeds. However, the rate of resistance development is influenced by factors such as the characteristics of the herbicide, the biological characteristics of the weed, and cultivation methods.

[0005] Herbicide resistance is a global challenge. Designing a herbicide that reduces application costs, delays weed resistance development, is environmentally safe, and effectively addresses the current problem of resistant weeds in soybean fields is urgently needed. Summary of the Invention

[0006] 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.

[0007] During their research, the inventors of this invention unexpectedly discovered that combining sulfonylpyrazine, metribuzin, and pendimethalin herbicides with different structural types and mechanisms of action not only avoids pesticide neutralization or other side effects, but also has a significant synergistic effect. This can greatly enhance the control efficacy of these three components against annual and perennial grasses 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.

[0008] Therefore, the first object of the present invention is to provide a herbicide composition wherein the active ingredients of the herbicide composition contain sulfopyrazine, metribuzin and pendimethalin.

[0009] A second object of the present invention is to provide the application of the above-described herbicide composition in the control of annual and perennial grasses and broadleaf weeds.

[0010] A third objective of this invention is to provide the application of the above-described herbicide composition in controlling annual and perennial grasses and broadleaf weeds in soybean fields.

[0011] Specifically, the herbicide composition provided by the present invention has the following advantages:

[0012] The herbicide composition provided by this invention exhibits excellent synergistic effects. The mixed composition significantly improves the weeding effect compared to its single agent, reduces the dosage of pesticides, and thus reduces farmers' pesticide costs and the degree of environmental impact.

[0013] 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 grasses and broadleaf weeds.

[0014] 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.

[0015] Other features and advantages of the present invention will be described in detail in the following detailed description section. Detailed Implementation

[0016] 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.

[0017] The active ingredients of the herbicide composition provided by the present invention contain sulfopyrazine, metribuzin and pendimethalin.

[0018] Although in this invention, the active ingredients only need to include sulfonylpyrazole, metribuzin, and pendimethalin to exhibit a significant synergistic effect, from the perspective of further improving this synergistic effect, preferably, the weight ratio of sulfonylpyrazole, metribuzin, and pendimethalin is 1:0.1-30:0.1-60; more preferably, the weight ratio of sulfonylpyrazole, metribuzin, and pendimethalin is 1:0.4-27:0.8-54; even more preferably, the weight ratio of sulfonylpyrazole, metribuzin, and pendimethalin is 1:0. 8-27:1.6-54; more preferably, the weight ratio of sulfonylpyrazole, metribuzin and pendimethalin is 1:1.6-27:3.3-54; more preferably, the weight ratio of sulfonylpyrazole, metribuzin and pendimethalin is 1:3.3-27:6.6-54; more preferably, the weight ratio of sulfonylpyrazole, metribuzin and pendimethalin is 1:6.6-27:13.3-54; more preferably, the weight ratio of sulfonylpyrazole, metribuzin and pendimethalin is 1:13.3-27:26.6-54.

[0019] Specific examples of the weight ratios of sulfonium pyrazosulfuron, metribuzin, and pendimethalin include: 7.5:25:50, 7.5:25:100, 7.5:25:200, 7.5:25:400, 7.5:50:50, 7.5:50:100, 7.5:50:200, 7.5:50:400, 7.5:100:50, 7.5:100:100, 7.5:100:200, 7.5:100:400, and 7.5:200:50. 7.5:200:100, 7.5:200:200, 7.5:200:400, 15:25:50, 15:25:100, 15:25:200, 15:25:400, 15:50:50, 15:50:100, 15:50:200, 15:50:400, 15:100:50, 15:100:100, 15:100:200, 15:100:400, 15:200:50, 15:200:10 0, 15:200:200, 15:200:400, 30:25:50, 30:25:100, 30:25:200, 30:25:400, 30:50:50, 30:50:100, 30:50:200, 30:50:400, 30:100:50, 30:100:100, 30:100:200, 30:100:400, 30:200:50, 30:200:100, 30:200:200 30:200:400, 60:25:50, 60:25:100, 60:25:200, 60:25:400, 60:50:50, 60:50:100, 60:50:200, 60:50:400, 60:100:50, 60:100:100, 60:100:200, 60:100:400, 60:200:50, 60:200:100, 60:200:200, 60:200:400, etc.

[0020] Considering the herbicidal activity against grassy weeds, the preferred weight ratios of sulfadiazine, metribuzin, and pendimethalin are 15:200:400, 15:100:200, 30:25:200, 15:200:100, 30:100:100, 7.5:200:100, 60:100:50, 30:50:100, 15:200:50, 7.5:200:400, 60:50:50, 30:100:400, 60:100:400, 15:50:50, 30:200:400, 60:200:100, 7.5:50:400, and 30:200:200.

[0021] Considering the herbicidal activity against broadleaf weeds, the preferred weight ratios of sulfadiazine, metribuzin, and pendimethalin are 15:100:200, 7.5:25:200, 7.5:100:50, 60:50:50, 30:50:400, 7.5:200:400, 7.5:25:400, 30:50:200, 15:200:100, 15:25:400, 60:25:50, 30:200:100, 7.5:25:50, 7.5:50:400, 15:25:100, 15:100:400, and 30:50:100.

[0022] 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 6-50% by weight.

[0023] 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.

[0024] In addition to the active ingredient, the herbicide composition of the present invention typically contains a pesticide-acceptable surfactant and carrier.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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, castor oil, corn oil, and pine nut oil.

[0034] The mineral oil includes one or more of liquid wax, engine oil, kerosene, and lubricating oil.

[0035] In addition, the above solvents can also be used as cosolvents.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The stabilizer is selected from one or more of triphenyl phosphite, epichlorohydrin, and acetic anhydride.

[0042] 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.

[0043] 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. All of the above formulations can be prepared by conventional methods in the art.

[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 grasses and broadleaf weeds.

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

[0059] The aforementioned weeds may be one or more of the following: foxtail grass, barnyard grass, barnyard grass, Kentucky bluegrass, wild oat, amaranth, lambsquarters, dayflower, purslane, thistle, spiny greens, foxtail grass, and wild oats; preferably one or more of the following: foxtail grass, barnyard grass, wild oats, dayflower, amaranth, thistle, lambsquarters, and spiny greens; more preferably one or more of the following: foxtail grass, barnyard 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 foxtail grass, crabgrass, amaranth, and lambsquarters, and is also highly safe for crops (e.g., soybeans).

[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 condition, and is generally based on an active ingredient content of 50-1800 g / hm². 2 The preferred application concentration is 200-1500 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, sulfopyrazole was purchased from Shanghai Qunli Chemical Co., Ltd. (purity 98 wt%); cypermethrin was purchased from Hangzhou Yingtai Biotechnology Co., Ltd. (purity 90 wt%); and pendimethalin was purchased from Hebei Wanquanlihua Chemical Co., Ltd. (purity 95 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 sulfonylpyrazine, metribuzin, and pendimethalin on common grasses and broadleaf weeds will be illustrated below through indoor toxicity tests.

[0070] Preparation of test reagents: Sulfonazole technical, metribuzin 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] Experimental Methods: The experiment employed a greenhouse pot method. Seeds of *Setaria viridis* (Grass family), *Digitaria sanguinalis* (Grass family), *Amaranthus retroflexus* (broadleaf weed), and *Chenopodium album* (broadleaf weed) were sown in small pots filled with 3 / 5 potting soil (field soil: nutrient soil: vermiculite = 3:1:1). 6 × 6 seeds were sown per pot, and 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 saturated, excess water was poured out. Soil spraying was performed 24 hours later. Foliar spraying was also conducted using an ASS-5 portable spray tower. A water treatment was used as a blank control. The plants were then transferred to a greenhouse for further cultivation and observation. The aboveground fresh weight of each treatment was assessed after 20 days. Watering was maintained regularly to keep the soil moist, except for 1–2 days after spraying.

[0072] The weed control efficacy is calculated using the following formula.

[0073]

[0074] Data statistical analysis methods:

[0075] 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 (sulfamethoxam), B is the single-agent weed fresh weight percentage of herbicide 2 (methamidophos), 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.

[0076] The following tests were performed respectively: (Results are shown in Table 1 and Table 2)

[0077] The combined effects of sulfonylpyrazine, metribuzin, and pendimethalin on grasses were tested, and the ratios and results are shown in Table 1.

[0078] The combined effects of sulfonylpyrazine, metribuzin, and pendimethalin on broadleaf weeds were tested, and the ratios and results are shown in Table 2.

[0079] Table 1

[0080]

[0081]

[0082] The results in Table 1 show that the combination of sulfonylpyrazole, metribuzin, and pendimethalin, at the given dosage, exhibits a significant synergistic effect on both foxtail grass and crabgrass. Furthermore, the synergistic effect is more significant when the weight ratios of sulfonylpyrazole, metribuzin, and pendimethalin are 15:200:400, 15:100:200, 30:25:200, 15:200:100, 30:100:100, 7.5:200:100, 60:100:50, 30:50:100, 15:200:50, 7.5:200:400, 60:50:50, 30:100:400, 60:100:400, 15:50:50, 30:200:400, 60:200:100, 7.5:50:400, or 30:200:200.

[0083] Table 2

[0084]

[0085]

[0086] The results in Table 2 show that the combination of sulfonylpyrazole, metribuzin, and pendimethalin, at the given dosage, exhibited a significant synergistic effect on both broadleaf weeds *Amaranthus retroflexus* and *Chenopodium album*. Furthermore, the synergistic effect is more significant when the weight ratio of sulfadiazine, metribuzin, and pendimethalin is preferably 15:100:200, 7.5:25:200, 7.5:100:50, 60:50:50, 30:50:400, 7.5:200:400, 7.5:25:400, 30:50:200, 15:200:100, 15:25:400, 60:25:50, 30:200:100, 7.5:25:50, 7.5:50:400, 15:25:100, 15:100:400, or 30:50:100.

[0087] Formulation Example 1 (15% by weight sulfonylpyrazine·methrin·pentazocine emulsifiable concentrate)

[0088] Formula: 30g sulfonylpyrazole, 30g cypermethrin, 90g pendimethalin, 300g solvent oil 150# (cosolvent), 10g calcium dodecylbenzenesulfonate (emulsifier), 60g castor oil polyoxyethylene ether (emulsifier), xylene (solvent) to 1kg;

[0089] Preparation method: Mix the above-mentioned weights of sulfonylpyrazine, cypermethrin, pendimethalin, solvent oil 150#, calcium dodecylbenzenesulfonate, castor oil polyoxyethylene ether, and solvent oil 150 to form a homogeneous oil phase, thereby obtaining an emulsifiable concentrate containing 15% by weight of active ingredients.

[0090] Formulation Example 2 (9% by weight sulfonylpyrazine·methrin·pentazocine emulsion)

[0091] Formula: 10g sulfonylpyrazole, 35g cypermethrin, 45g pendimethalin, 300g N,N-dimethylformamide, 40g castor oil polyoxyethylene ether, 40g fatty alcohol polyoxyethylene ether, 50g 1,2-propanediol, 10g xanthan gum, water to 1kg.

[0092] Preparation method: The above-mentioned sulfonylpyrazole, cypermethrin, pendimethalin, N-methylpyrrolidone, castor oil polyoxyethylene ether, and fatty alcohol polyoxyethylene ether are mixed into a homogeneous oil phase; ethylene glycol, xanthan gum, and water are mixed into a homogeneous aqueous phase; under high-speed stirring, the oil phase is added to the aqueous phase to form a water emulsion with good dispersibility containing 9% by weight of active ingredients.

[0093] Formulation Example 3 (30% by weight sulfonylpyrazine·methrin·pentazocine dispersible oil suspension)

[0094] Formula: 100g sulfonylpyrazole, 100g cypermethrin, 100g pendimethalin, 60g polyoxyethylene fatty acid ester, 40g sorbitol polyoxyethylene ether, 40g organic bentonite, and methyl oleate to 1kg.

[0095] Using methyl oleate as a medium, the above-mentioned sulfonylpyrazole, cypermethrin, pendimethalin, polyoxyethylene fatty acid ester, sorbitol polyoxyethylene ether, and organic bentonite are added to a sand mill and ground finely to obtain an oil suspension containing 30% by weight of active ingredients.

[0096] Formulation Example 4 (22% by weight sulfonylpyrazine·methrin·pentylene suspension)

[0097] Formula: 70g sulfonylpyrazole, 25g cypermethrin, 125g pendimethalin, 60g naphthalenesulfonate (dispersant), 40g polyoxyethylene ether (wetting agent), 150g glycerol (antifreeze agent), 60g sodium alginate (thickener), 10g silicone defoamer, water to 1000g;

[0098] Preparation method: Using water as a medium, the above-mentioned weights of sulfonylpyrazole, metribuzin, dimethyl pendimethalin, naphthalene sulfonate, polyoxyethylene ether, glycerol, sodium alginate, organosilicon defoamer, and water are added to a shearing kettle, sheared evenly, and then ground finely in a sand mill to obtain a suspension containing 22% by weight of active ingredients.

[0099] Formulation Example 5 (34% by weight sulfonylpyrazine·methrin·pentazine suspension emulsion)

[0100] Sulfonazole 20g, cypermethrin 80g, pendimethalin 240g, solvent oil No. 200 300g, calcium dodecylbenzenesulfonate 80g, fatty alcohol polyoxyethylene ether 80g, xanthan gum 30g, propylene glycol 60g, water to 1kg.

[0101] Using water as a medium, the above-mentioned sulfonylpyrazole, metribuzin, calcium dodecylbenzenesulfonate, fatty alcohol polyoxyethylene ether, xanthan gum, and propylene glycol are added to a sand mill and ground finely to obtain sulfonylpyrazole·metribuzin aqueous suspension. Dimethyl pendimethalin, solvent oil No. 150, sodium dodecylbenzenesulfonate, and fatty alcohol polyoxyethylene ether are thoroughly mixed to form an oil phase. The oil phase is added to the sulfonylpyrazole·metribuzin aqueous suspension to obtain a suspension emulsion containing 34% by weight of active ingredients.

[0102] Formulation Example 6 (60% by weight sulfonylpyrazine·methrin·pentazine water-dispersible granules)

[0103] Formula: 200g sulfonylpyrazole, 200g cypermethrin, 200g pendimethalin, 150g rosin block polyoxyethylene ether polyoxypropylene ether sulfonate, 50g calcium lignosulfonate, 100g starch, and diatomaceous earth to make up to 1kg.

[0104] Preparation method: The above-mentioned sulfonylpyrazole, cypermethrin, pendimethalin, rosin block polyoxyethylene ether polyoxypropylene ether sulfonate, calcium lignosulfonate, starch, and diatomaceous earth are mixed, pulverized, and extruded to form water-dispersible granules containing 60% by weight of active ingredients.

[0105] Formulation Example 7 (60% by weight sulfonium pyrazosulfuron-methyl·pentylene wettable powder)

[0106] Formula: 50g sulfonylpyrazole, 150g metribuzin, 400g pendimethalin, 100g sodium dodecyl sulfate (wetting agent), 150g naphthalene sulfonate (dispersant), ammonium sulfate (filler) to make up to 1000g;

[0107] Preparation method: Mix and pulverize the above-mentioned weights of sulfonylpyrazine, metribuzin, dimethyl pendimethalin, sodium dodecyl sulfate, naphthalene sulfonate, and ammonium sulfate to prepare a wettable powder containing 60% by weight of active ingredients.

[0108] Formulation Example 8 (65% by weight sulfonylpyrazine·methrin·pentylene wettable powder)

[0109] Formula: 50g sulfonylpyrazole, 200g cypermethrin, 400g pendimethalin, 80g alkylphenol polyoxyethylene ether sulfate (wetting agent), 80g sodium hydroxyphenyl lignin sulfonate (dispersant), 20g silica (filler), and light calcium carbonate to make up to 1kg;

[0110] Preparation method: Mix and pulverize the above-mentioned weights of sulfonium pyrazol, cypermethrin·dimethylpentyl sulfonate, alkylphenol polyoxyethylene ether sulfate, sodium hydroxyphenyl lignin sulfonate, silica, and light calcium carbonate to prepare a wettable powder with 65% by weight of active ingredients.

[0111] Test Example 1

[0112] Test reagents:

[0113] Formulations prepared according to Examples 1-8;

[0114] 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.

[0115] 48% by weight of metribuzin SC (48% metribuzin SC): Add 48g of metribuzin, 2g of sodium lignosulfonate, 3g of polycarboxylate, 6g of urea, 0.5g of defoamer, and water to a shearing kettle to make up to 100g. Shear evenly and then grind finely in a sand mill and filter to obtain the product.

[0116] 33% Pendimethalin EC (33% Pendimethalin EC): Registration No.: PD20094188, purchased from Shenyang Kechuang Chemicals Co., Ltd.

[0117] Test method:

[0118] Experimental Methods: The experiment employed a greenhouse pot method. Seeds of foxtail grass (Poaceae), crabgrass (Poaceae), amaranth (broadleaf weed), and lambsquarters (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 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, 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.

[0119] Method for calculating weed control effectiveness:

[0120]

[0121] The test results are shown in Table 3.

[0122] Table 3

[0123]

[0124] As shown in Table 3, the combination of sulfadiazine, metribuzin, and pendimethalin exhibits significant control effects against grasses such as foxtail grass and barnyardgrass, as well as broadleaf weeds such as amaranth and lambsquarters.

[0125] 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 are sulfonylpyrazole, metribuzin and pendimethalin, and the content of the active ingredients in the herbicide composition is 1-98% by weight, and the weight ratio of sulfonylpyrazole, metribuzin and pendimethalin is 1:0.1-30:0.1-60.

2. The herbicide composition according to claim 1, wherein, The active ingredient is present in the herbicide composition at a concentration of 5-80% by weight.

3. The herbicide composition according to claim 2, wherein, The active ingredient is present in the herbicide composition at a concentration of 6-50% by weight.

4. The herbicide composition according to claim 1, wherein, The weight ratio of sulfonylpyrazine, metribuzin and pendimethalin is 1:0.4-27:0.8-54.

5. The herbicide composition according to claim 4, wherein, The weight ratio of sulfonylpyrazine, metribuzin and pendimethalin is 1:0.8-27:1.6-54.

6. The herbicide composition according to claim 5, wherein, The weight ratio of sulfonylpyrazine, metribuzin and pendimethalin is 1:1.6-27:3.3-54.

7. The herbicide composition according to claim 6, wherein, The weight ratio of sulfonylpyrazine, metribuzin and pendimethalin is 1:3.3-27:6.6-54.

8. The herbicide composition according to claim 7, wherein, The weight ratio of sulfonylpyrazine, metribuzin and pendimethalin is 1:6.6-27:13.3-54.

9. The herbicide composition according to claim 8, wherein, The weight ratio of sulfonylpyrazine, metribuzin and pendimethalin is 1:13.3-27:26.6-54.

10. The herbicide composition according to claim 1, wherein, The weight ratios of sulfonium pyrazosulfuron, metribuzin, and pendimethalin are 7.5:25:50, 7.5:25:100, 7.5:25:200, 7.5:25:400, 7.5:50:50, 7.5:50:100, 7.5:50:200, 7.5:50:400, 7.5:100:50, 7.5:100:100, 7.5:100:200, 7.5:100:400, 7.5:200:50, 7.5:200:100, 7.5:200:200, 7.5:200:400, and 15: 25:50, 15:25:100, 15:25:200, 15:25:400, 15:50:50, 15:100:50, 15:200:50, 30:25:50, 30:25:100, 30:25:200, 30:25:400, 30:50:50, 30:100:50, 30:200:50, 60:25:50, 60:25:100, 60:25:200, 60:25:400, 60:50:50, 60:100:50 or 60:200:

50.

11. The herbicide composition according to any one of claims 1-10, wherein, The herbicide composition also includes a pesticide-acceptable surfactant and carrier.

12. The herbicide composition according to claim 11, 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.

13. The use of the herbicide composition according to any one of claims 1-12 in controlling annual and perennial grass and broadleaf weeds; wherein the weeds are one or more of foxtail grass, crabgrass, amaranth, and lambsquarters.

14. The use of the herbicide composition according to any one of claims 1-12 in controlling annual and perennial grasses and broadleaf weeds in soybean fields; wherein the weeds are one or more of foxtail grass, crabgrass, amaranth, and lambsquarters.

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