Weeding composition containing pyroxasulfone, isoproturon and mesosulfuron-methyl

Abstract

The invention relates to a weeding composition containing pyroxasulfone, isoproturon and mesosulfuron-methyl. The weight ratio of the three active ingredients is (1.0-5.0): (26.5-33.2): (0.1-0.7). The weeding composition provided by the invention can further comprise an agriculturally acceptable auxiliary agent and a carrier, and can be prepared into agriculturally acceptable dosage forms. The invention also relates to an application of the weeding composition for preventing and treating agricultural weeds.

Description

Technical Field

[0001] The invention relates to the field of agriculture, and in particular to a herbicidal composition containing pyraclostrobin, isoproturon and mesosulfuron, and a method and application of the herbicidal composition in preventing and controlling agricultural weeds. Background Art

[0002] Sulfonepyraclostrobin is a new type of isoxazole herbicide developed by Kumizu Chemical Co., Ltd. of Japan. It is a broad-spectrum, highly active pre-emergence soil treatment agent, mainly used to control annual grass and broad-leaved weeds. The mechanism of action of sulfonepyraclostrobin is to inhibit the synthesis of long-chain fatty acids in plants, and it is a very long-chain fatty acid synthesis inhibitor. Sulfonepyraclostrobin is suitable for a variety of crops, such as corn, wheat, soybeans, cotton, sunflowers, potatoes, peanuts, etc., and effectively controls annual grass weeds such as foxtail, barnyard grass, bluegrass, canary grass, crabgrass, sedge, goosegrass, ryegrass, and annual broad-leaved weeds such as nightshade, Amaranthus retroflexus, and Purslane.

[0003] Isoproturon is a substituted urea herbicide widely used in the agricultural field. The original drug is white powdery in appearance and is soluble in most organic solvents, with relatively low solubility in water. Its main mechanism of action is that after being absorbed by the roots, stems and leaves of weeds, it interferes with photosynthesis, causing the weeds to stop growing and die. Isoproturon is mainly used in wheat, rice and other crop fields to control annual weeds. It can effectively control a variety of annual weeds such as crabgrass, foxtail millet, bluegrass, wild oats, cardamine, shepherd's purse, ryegrass, chickweed, and ragwort.

[0004] Mesosulfuron is a sulfonylurea high-efficiency herbicide that works by inhibiting acetolactate synthase, which is a key enzyme in the branched-chain amino acid synthesis pathway in plants. Inhibiting the activity of this enzyme will lead to the obstruction of branched-chain amino acid synthesis, thereby affecting cell division and plant growth. When mesosulfuron is absorbed by the roots and leaves of weeds, it is widely distributed in the plant body through conduction, eventually causing the weeds to stop growing and die. Mesosulfuron has a wide control spectrum and is mainly used to control grass weeds and some broad-leaved weeds in wheat fields. Specific control targets include grass weeds such as alopecuroides, wild oats, bluegrass, hard grass, alkaligrass, multiflora ryegrass, brome, and knotweed, as well as some broad-leaved weeds such as shepherd's purse, sophora japonica, and chickweed.

[0005] CN108293988A discloses a herbicidal composition containing sulfonepyraclostrobin, wherein the active ingredient contained in the herbicidal composition is a composition of sulfonepyraclostrobin and pendimethalin or isoproturon. Furthermore, the herbicidal composition and a third component together form a ternary herbicidal composition, and the third component is acetochlor.

[0006] CN108077292A discloses a herbicide composition with pyraclostrobin, isoproturon and difluanid as active ingredients. The herbicide composition has a synergistic effect, and compared with the use of each single agent alone or in a dual use, the herbicide composition significantly improves the herbicidal effect and expands the weed control spectrum, while reducing the amount of pesticide used, reducing pollution to the environment, and delaying the development of weed resistance.

[0007] CN116158442A discloses a herbicidal composition comprising sulfonepyraclostrobin and isoproturon, wherein the ratio of sulfonepyraclostrobin to isoproturon is 1-10:2-40; sulfonepyraclostrobin and isoproturon have a synergistic effect.

[0008] No reports on the combination of sulfonepyraclostrobin, isoproturon and mesosulfuron-methyl were found in the prior art. Summary of the invention

[0009] The inventors have found through experiments that the ternary composition of pyraclostrobin, isoproturon and mesosulfuron has a synergistic effect in weed control.

[0010] Therefore, one aspect of the present invention relates to a herbicidal active ingredient combination, wherein the herbicidal active ingredient combination comprises pyraclostrobin, isoproturon and mesosulfuron; the weight ratio of the three is 1.0-5.0:26.5-33.2:0.1-0.7.

[0011] In a preferred embodiment of the present invention, the weight ratio of sulfonepyraclostrobin, isoproturon and mesosulfuron is 2.0-4.0:28.2-30.8:0.2-0.5.

[0012] In the above preferred weight ratio range, wherein,

[0013] The weight ratio value of the sulfonepyraclostrobin can be selected as 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0.

[0014] The weight ratio value of the isoproturon can be selected as 28.2, 28.3, 28.4, 28.5, 28.6, 28.7, 28.8, 28.9, 29.0, 29.1, 29.2, 29.3, 29.4, 29.5, 29.6, 29.7, 29.8, 29.9, 30.0, 30.1, 30.2, 30.3, 30.4, 30.5, 30.6, 30.7, 30.8.

[0015] The weight ratio of the mesosulfuron can be selected as 0.2, 0.3, 0.4, or 0.5.

[0016] In a more preferred embodiment of the present invention, the weight ratio of pyraclostrobin, isoproturon and mesosulfuron is 3.0:29.6:0.4.

[0017] In a preferred embodiment of the present invention, the herbicidal active ingredient combination further comprises an effective amount of a herbicide safener, and the herbicide safener includes one or more of pyraclostrobin, fenpyrad, clofos-butyl, isoxadiazole and cyproconazole, preferably pyraclostrobin.

[0018] Wherein, when the herbicide active ingredient combination contains a herbicide safener, the weight ratio of sulfonepyraclostrobin, isoproturon, mesosulfuron and the herbicide safener is 1.0-5.0:26.5-33.2:0.1-0.7:0.5-2.0; the weight ratio of sulfonepyraclostrobin, isoproturon, mesosulfuron and the herbicide safener is preferably 2.0-4.0:28.2-30.8:0.2-0.5:1.2-1.8.

[0019] More preferably, the weight ratio of pyraclostrobin, isoproturon and mesosulfuron is as described above. The weight ratio of the herbicide safener includes 1.2, 1.3, 1.4, 1.5, 1.6, 1.7 and 1.8.

[0020] In a more preferred embodiment of the present invention, the weight ratio of pyraclostrobin, isoproturon, mesosulfuron and herbicide safener is 3.0:29.6:0.4:1.2.

[0021] In the herbicidal active ingredient combination of the present invention, the three herbicides have obvious synergistic effects under the above ratio, which is specifically manifested in that they show excellent synergistic effects relative to the single agents of the three herbicides and the combinations of any two of them, and have excellent weed control effects.

[0022] Another aspect of the present invention relates to a herbicidal composition, wherein the herbicidal composition comprises the herbicidal active ingredient combination of the present invention as described above, and an agriculturally acceptable adjuvant.

[0023] In one embodiment of the present invention, the composition is prepared into an agriculturally acceptable dosage form. The agriculturally acceptable dosage form includes suspension concentrate, suspoemulsion, water dispersible granules, wettable powder, emulsifiable concentrate, water emulsion, microemulsion, preferably suspoemulsion.

[0024] When the herbicide composition of the present invention is prepared into the above-mentioned agricultural dosage form, it is usually necessary to use agriculturally acceptable adjuvants. The preparation processing method is well known to those skilled in the art, and the above-mentioned agricultural dosage forms can be prepared by conventional processing methods in the field of dosage form processing.

[0025] The agriculturally acceptable adjuvant includes, but is not limited to, one or more of solvents, emulsifiers, dispersants, wetting agents, binders, disintegrants, thickeners, antifreeze agents, defoaming agents, preservatives, fillers and / or carriers.

[0026] The solvent can be selected from one or more of dimethylformamide, dimethyl sulfoxide, xylene, acetone, ethyl acetate, cyclohexane, ethyl glycol ether, cyclohexanone, N-methylpyrrolidone, coconut fatty acid methyl ester, cyclohexanone, methyl glycol ether, aromatic solvent oil, acetonitrile, tetralin, isophorone, and water.

[0027] The emulsifier can be selected from one or more of naphthalene sulfonate formaldehyde condensate, castor oil polyoxyethylene ether nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, polyoxyethylene alkyl ether, alkylphenol formaldehyde resin polyoxyethylene ether, lignin sulfonate, benzyl dimethylphenol polyoxyethyl ether, styryl phenyl polyoxyethylene ether, polyoxyethylene sorbitan fatty acid ester, alkylphenol EO / PO copolymer, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, linear calcium dodecylbenzene sulfonate, nonylphenol polyether phosphate, phenylphenol polyoxyethyl ether phosphate, and sorbitan fatty acid ester polyoxyethylene ether.

[0028] The dispersant can be selected from one or more of nonylphenol polyoxyethylene ether, lignin sulfonate, polyoxyethylene alkyl aryl ether, polyoxyethylene lanolin alcohol, alkyl naphthalene sulfonate formaldehyde condensate, cresol sulfonic acid formaldehyde condensate, fatty alcohol polyoxyethylene ether, naphthalenesulfonic acid formaldehyde condensate sodium salt, tristyryl polyoxyethylene ether phosphate triethanolamine, sodium p-hydroxyphenyl lignin sulfonate, fatty alcohol polyoxyethylene ether sulfate, sodium alkyl diphenyl ether sulfonate, alkylphenol polyoxyethylene ether formaldehyde condensate, fatty alcohol EO / PO copolymer, fatty alcohol polyoxyethylene ether phosphate, and polyoxyethylene sorbitan fatty acid ester.

[0029] The wetting agent can be selected from one or more of sodium dodecyl sulfate, calcium dodecylbenzene sulfonate, sodium lauroyl sarcosinate, trisiloxane polyoxyethylene ether, sodium N-lauroyl glutamate, dioctyl sulfosuccinate, polyoxyethylene alkyl aryl ether phosphate, sodium isooctyl succinate sulfonate, sodium oleyl methyl taurate, triphenyl ethyl phenol polyoxyethylene ether, castor oil polyoxyethylene ether, polyoxyethylene fatty acid esters, and fatty alcohol polyoxyethylene ethers.

[0030] The binder may be selected from one or more of gum arabic, xanthan gum, starch, carboxymethyl cellulose, carboxyethyl cellulose and gelatin.

[0031] The disintegrant may be selected from one or more of sodium sulfate, calcium sulfate, sodium bicarbonate, ammonium sulfate, magnesium chloride, sodium carboxymethyl starch, and urea.

[0032] The thickener can be selected from one or more of magnesium aluminum silicate, sodium alginate, xanthan gum, gum arabic, carboxymethyl cellulose, sodium carboxymethyl cellulose, and polyvinyl alcohol.

[0033] The antifreeze agent can be selected from one or more of glycerol, ethylene glycol, propylene glycol, and polyethylene glycol.

[0034] The defoaming agent can be selected from one or more of silicone, butyl phosphate, isobutyl phosphate, n-octanol, and polydimethylsiloxane.

[0035] The preservative may be selected from one or more of benzoic acid, sodium benzoate, 1,2-benzisothiazol-3-one, and 2-methylisothiazolinone.

[0036] The filler and / or carrier can be selected from one or more of bentonite, attapulgite, montmorillonite, diatomaceous earth, kaolin, calcium carbonate, zeolite, castor oil, soybean oil, corn oil, turpentine, rapeseed oil, methyl oleate, coconut oil, mineral oil, and water.

[0037] In one embodiment of the present invention, the weight percentage of the herbicidal active ingredient combination in the composition is 20-45%, preferably 25-40%, more preferably 30-35%.

[0038] In a preferred embodiment of the present invention, the pesticide composition is prepared as a suspoemulsion, wherein the components and their weight percentages in the suspoemulsion are:

[0039] Sulfonepyraclostrobin 1.0-5.0%, isoproturon 26.5-33.2%, methyl disulfone 0.1-0.7%, herbicide safener 0-2.0%, dispersant 1.5-5%, emulsifier 1-5%, solvent 5-20%, antifreeze 2-8%, defoamer 0.1-2%, thickener 0.05-0.5%, preservative 0.1-0.5%, and water as the balance.

[0040] Preferably, the components and their weight percentages in the preparation are:

[0041] Sulfonepyraclostrobin 2.0-4.0%, isoproturon 28.2-30.8%, methyl disulfone 0.2-0.5%, herbicide safener 1.2-1.8%, dispersant 2-4%, emulsifier 1.5-2%, solvent 8-12%, antifreeze 3-6%, defoamer 0.5-1%, thickener 0.1-0.3%, preservative 0.15-0.3%, and water as the balance.

[0042] More preferably, the components and their weight percentages in the preparation are:

[0043] Sulfone 3.0%, isoproturon 29.6%, methyl disulfone 0.4%, herbicide safener 1.2%, dispersant 2.7%, emulsifier 2.0%, solvent 10%, antifreeze 4%, defoamer 0.8%, thickener 0.15%, preservative 0.2%, balance water.

[0044] In the suspoemulsion of the present invention, the definitions of the auxiliary agents are as described above. Among them:

[0045] The dispersant is preferably one or more of tristyryl polyoxyethylene ether phosphate triethanolamine, cresol sulfonic acid formaldehyde condensate, and fatty alcohol EO / PO copolymer; more preferably a combination of the above three, such as Dispersogen LFS (Clariant, tristyryl polyoxyethylene ether phosphate triethanolamine), Dispersogen 1494Liq (Clariant, cresol sulfonic acid formaldehyde condensate, 35%), and Tersperse 4894 (Huntsman, fatty alcohol EO / PO copolymer), and the weight ratio of the three is 15:7:5.

[0046] The emulsifier is preferably an alkylphenol EO / PO copolymer, such as Termul 200 (Huntsman, alkylphenol EO / PO copolymer).

[0047] In the suspoemulsion of the present invention, when the above-mentioned specific dispersant combination and specific emulsifier are selected, excellent formulation stability can be exhibited, for example, excellent performance in suspension, emulsification, cold and hot storage stability, etc., which is more advantageous for the present invention.

[0048] Another aspect of the present invention relates to a method for controlling agricultural weeds using the herbicidal active ingredient combination of the present invention or the herbicidal composition of the present invention, wherein the herbicidal active ingredient combination or the herbicidal composition is contacted with agricultural weeds. The method of application can be determined by a person skilled in the art, preferably by spraying on the stems and leaves. The application rate can be any amount allowed by the herbicidal active ingredient, which depends on the crop growth conditions, weed conditions, environmental factors, etc., and can be determined by a person skilled in the art taking these factors into consideration.

[0049] Another aspect of the present invention relates to the use of the herbicidal active ingredient combination of the present invention or the herbicidal composition of the present invention for controlling agricultural weeds, wherein the specific application method and application amount are as described above.

[0050] In the method and / or use of the present invention, the agricultural weeds that can be used for prevention and treatment include: Digitaria, Alopecuroides, Bluegrass, Wild Oats, Goosegrass, Multiflora Lolium, Bromus, Aegilops tauschii, Artemisia selengensis, Chickweed, Solanum nigrum, Amaranthus retroflexus, Purslane, etc., preferably Multiflora Lolium. Applicable crops include: corn, wheat, sorghum, soybean, cotton, sunflower, potato, peanut, etc., preferably wheat. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a flow chart for the preparation of the suspoemulsion of Example 1. DETAILED DESCRIPTION

[0052] The present invention will be further described below in conjunction with embodiments, but the present invention is not limited thereto.

[0053] Unless otherwise specified, the percentages described in the following examples are all percentages by weight.

[0054] 1. Indoor weed test

[0055] Test target: Lolium multiflorum;

[0056] Test agents: sulfonepyraclostrobin technical, isoproturon technical, mesosulfuron technical. When preparing the agent, first dissolve it with an appropriate amount of dimethylformamide, and then use 1% Tween 80 aqueous solution to prepare it to the required concentration.

[0057] Test method: put fine soil into plastic pots, add water to soak the soil, evenly sow multiflora ryegrass seeds on the soil surface, 20 seeds per pot, cover with 1cm of soil after sowing, and place in an artificial climate box for cultivation. Spray treatment when multiflora ryegrass seedlings grow to the 2-leaf stage. Use a walking spray tower for spraying, with a spray pressure of 275kPa and a spray volume of 450L / hm 2 After treatment, the plants were placed in a greenhouse for further cultivation. A 0.1% Tween 80 aqueous solution without the drug was used as a blank control. Each treatment was repeated 4 times. 28 days after treatment, the fresh weight of each pot of multiflora ryegrass was measured and the fresh weight control effect was calculated.

[0058]

[0059] E: fresh weight prevention effect;

[0060] C: fresh weight of aboveground part of control weeds;

[0061] T: fresh weight of aboveground part of treated weeds;

[0062] Then, the combined effect of the combination was calculated according to the Colby formula (SR Colby, Calculating Synergistic and Antagonistic Responsed of Herbicide Combinations. Weeds, 1967):

[0063] E0=X+Y-XY / 100………(1); or

[0064] E0=X+Y+Z-(XY+XZ+YZ) / 100+XYZ / 10000......(2)

[0065] X is the control effect when the active ingredient A is applied at an application rate of m, expressed as a percentage of the untreated control group;

[0066] Y is the control effect when the active component B is applied at an application rate of n, expressed as a percentage of the untreated control group;

[0067] Z is the control effect when the active ingredient C is applied at an application rate of r, expressed as a percentage of the untreated control group;

[0068] E0 is the theoretical control effect when active components A and B are applied at application rates of m and n, expressed as a percentage of the untreated control group (Formula 1); or, E0 is the theoretical control effect when active components A, B, C are applied at application rates of m, n, r, expressed as a percentage of the untreated control group (Formula 2).

[0069] If the observed value of the protective effect (actual protective effect) is higher than the theoretical value calculated by the above formula, the composition has superadditivity, that is, there is a synergistic effect.

[0070] The test results of the herbicidal composition of the present invention on multiflora ryegrass are shown in Table 1 below.

[0071] Table 1 Determination results of the combination of sulfonepyraclostrobin, isoproturon and mesosulfuron

[0072]

[0073] The results in Table 1 show that the combination of pyraclostrobin, isoproturon and methyl disulfone has a significant synergistic effect in the ratio range of 2.0-4.0:28.2-30.8:0.2-0.5 compared with the three single agents of pyraclostrobin, isoproturon and methyl disulfone and their combinations. The synergistic effect is most obvious when the ratio of the three is 3.0:29.6:0.4.

[0074] 2. Preparation Examples

[0075] The following auxiliary agents used in the following formula screening test of the present invention are as follows:

[0076] Dispersogen LFS, tristyryl polyoxyethylene ether phosphate triethanolamine (Clariant);

[0077] Dispersogen 1494Liq, cresolsulfonic acid formaldehyde condensate (35%, Clariant);

[0078] Tersperse 4894, fatty alcohol EO / PO copolymer (Huntsman);

[0079] Dispersol TM BB4, alkylnaphthalene sulfonate formaldehyde condensate (HeDa);

[0080] Dowfax D-810, sodium alkyl diphenyl ether sulfonate (Dow);

[0081] Termul 200, alkylphenol EO / PO copolymer (Huntsman);

[0082] Phenylsulfonat CA, linear calcium dodecylbenzenesulfonate (Clariant);

[0083] Triton QS-44, nonylphenol polyether phosphate (Dow);

[0084] Solvesso 200ND, 200# aromatic solvent oil (Mobil)

[0085] SAG 1572, polydimethylsiloxane emulsion defoamer (Momentive)

[0086] Rhodopol G, xanthan gum (Solvay);

[0087] ACTICIDE MBS, 1,2-Benzisothiazol-3-one, 2-methylisothiazolinone mixture in aqueous solution (Thor)

[0088] Other reagents / auxiliaries used in the present invention are all commercially available.

[0089] Example 1

[0090] The formula composition is: sulfone metabendazole 3%, isoproturon 29.6%, mesosulfuron 0.4%, pyraclostrobin 1.2%, Dispersogen LFS 1.5%, Dispersogen 1494 Liq 0.7%, Tersperse 4894 0.5%, Termul 2002%, cyclohexanone 5%, Solvesso 200ND 5%, propylene glycol 4%, SAG 1572 0.8%, Rhodopol G 0.15%, ACTICIDE MBS 0.2%, and water makes up 100%.

[0091] The preparation method is as follows: pre-disperse isoproturon, mesotrione, pyraclostrobin, Dispersogen LFS, Dispersogen 1494Liq, Tersperse 4894, SAG 1572, propylene glycol and water, and then grind them by primary sand milling and secondary sand milling to obtain a suspension; mix pyraclostrobin, Termul 200, cyclohexanone and Solvesso 200ND, and mix them with the prepared suspension after high-speed shearing; prepare an aqueous solution of Rhodopol G, ACTICIDE MBS and water, and then add them to the above-mentioned mixed solution, shear them evenly, prepare a suspoemulsion product, and package it after passing the test. The specific preparation process is as follows: Figure 1 shown.

[0092] Example 2

[0093] The formula composition is: sulfone pyraclostrobin 2%, isoproturon 30.5%, mesosulfuron 0.3%, pyraclostrobin 1.6%, Dispersogen LFS 1.8%, Dispersol TM BB4 1.2%, Phenylsulfonat CA 2.2%, Cyclohexanone 6%, Solvesso 200ND 6%, Ethylene glycol 5%, Silicone 0.5%, Sodium alginate 0.3%, Sodium benzoate 0.5%, Water to make up 100%.

[0094] The preparation method is basically the same as that of Example 1.

[0095] Example 3

[0096] The formula composition is: sulfone metabendazole 4%, isoproturon 28.4%, mesosulfuron 0.5%, pyraclostrobin 1.8%, Dowfax D-810 2.5%, Tersperse 4894 0.5%, Triton QS-44 2.4%, cyclohexanone 5%, Solvesso200ND 5%, glycerol 3%, isobutyl phosphate 0.5%, magnesium aluminum silicate 0.4%, 1,2-benzisothiazol-3-one 0.4%, and water makes up to 100%.

[0097] The preparation method is basically the same as that of Example 1.

[0098] Example 4

[0099] The formula composition is: 2.8% sulfamethoxazole, 30.2% isoproturon, 0.2% mesosulfuron, 1.4% pyraclostrobin, Dispersol TM BB4 1.3%, Dowfax D-810 1.4%, Triton QS-44 2.3%, cyclohexanone 5%, Solvesso 200ND 5%, polyethylene glycol 6%, n-octanol 0.7%, gum arabic 0.3%, sodium benzoate 0.3%, water to make up 100%.

[0100] The preparation method is basically the same as that of Example 1.

[0101] Then, the suspension rate test was performed on the suspoemulsions prepared in Examples 1-4, and the heat storage stability test was performed after storage at 54° C. for 14 days.

[0102] The hot storage stability test is carried out in accordance with GB / T19136-2003.

[0103] The suspension rate determination refers to GB / T 14825-2006. The specific method is: take 1 mL of the samples of Examples 1-4 above respectively, add them to a beaker containing 50 mL of standard hard water (342 mg / L) and stir them evenly with a glass rod, then wash them all into a 250 mL measuring cylinder with standard hard water, and dilute to the scale, cover the stopper, and turn the measuring cylinder upside down 30 times within 1 minute with the bottom of the measuring cylinder as the axis. Open the stopper, put it vertically into a constant temperature water bath at 30°C, and leave it for 30 minutes. Then use a pipette to remove 9 / 10 (225 mL) of the contents. When extracting the liquid, the pipette moves down along the inner wall of the measuring cylinder as the liquid level drops to avoid stirring the lower sediment. Determine the content of the active ingredient in the sample and the 25 mL emulsion remaining at the bottom of the measuring cylinder. The experiment is repeated 3 times. Calculate the sample suspension rate according to the following formula:

[0104] Suspension rate = [(m1-m2) / m1]×(10 / 9)

[0105] Where:

[0106] m1 represents the mass of the active ingredient in the suspension emulsion sample;

[0107] m2 represents the mass of the active ingredient in the 25 mL of suspension remaining at the bottom of the measuring cylinder.

[0108] The results are shown in Table 2 below.

[0109] Table 2 Determination of quality indexes of suspoemulsion

[0110]

[0111] The above results show that the total suspension rates of the suspoemulsions of Examples 1-4 of the present invention are all greater than 80%, wherein the suspension rate of the preparation of Example 1 is significantly higher than that of Examples 2-4, which is 97.5%. Moreover, the total decomposition rates of the suspoemulsions of Examples 1-4 of the present invention during hot storage are all less than 5%, wherein the decomposition rate of the preparation of Example 1 is significantly lower than that of Examples 2-4, which is 1.1%. In terms of appearance after hot storage, there is no change in Example 1, and there is basically no change in Examples 2-4.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A herbicidal active ingredient combination, characterized in that: The herbicidal active ingredient combination comprises pyraclostrobin, isoproturon and mesosulfuron; the weight ratio of the three is 1.0-5.0:26.5-33.2:0.1-0.

7.

2. The herbicidal active ingredient combination according to claim 1, characterized in that The weight ratio of sulfonepyraclostrobin, isoproturon and mesosulfuron is preferably 2.0-4.0:28.2-30.8:0.2-0.

5.

3. The herbicidal active ingredient combination according to claim 1 or 2, characterized in that The herbicidal active ingredient combination further comprises an effective amount of a herbicide safener.

4. A herbicidal composition, characterized in that: The herbicidal composition comprises the herbicidal active ingredient combination according to any one of claims 1 to 3, and an agriculturally acceptable adjuvant.

5. The herbicidal composition according to claim 4, characterized in that The composition is prepared into an agriculturally acceptable formulation.

6. The herbicidal composition according to claim 5, characterized in that The agriculturally acceptable dosage forms include suspensions, suspoemulsions, water dispersible granules, wettable powders, emulsifiable concentrates, aqueous emulsions, and microemulsions.

7. The composition according to claim 4, characterized in that The agriculturally acceptable adjuvant includes one or more of solvents, emulsifiers, dispersants, wetting agents, adhesives, disintegrants, thickeners, antifreeze agents, defoamers, preservatives, stabilizers, pH regulators, fillers and / or carriers.

8. The composition according to any one of claims 4 to 7, characterized in that The weight percentage of the herbicidal active ingredient combination in the composition is 20-45%.

9. A method for controlling agricultural weeds using the herbicidal active ingredient combination according to any one of claims 1 to 3 or the herbicidal composition according to any one of claims 4 to 8, characterized in that: The herbicidal active ingredient combination or the herbicidal composition is brought into contact with agricultural weeds.

10. Use of the herbicidal active ingredient combination according to any one of claims 1 to 3 or the herbicidal composition according to any one of claims 4 to 8 for controlling agricultural weeds.

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