Weeding composition containing pyroxasulfone, prometryn and flumioxazin as well as herbicide and application thereof

Abstract

The invention belongs to the technical field of herbicides, and provides a weeding composition containing pyroxasulfone, prometryn and flumioxazin as well as a herbicide and application thereof. The weeding composition disclosed by the invention is prepared from active ingredients including pyroxasulfone, prometryn and flumioxazin, wherein the mass ratio of pyroxasulfone to prometryn to flumioxazin is (1-20): (1-50): (1-20); the combination of the three active components has an obvious synergistic effect, and the composition has an obvious closing effect on weeds in a soybean field and does not affect normal growth of soybeans. Compared with a binary mixed medicament, the ternary weeding composition disclosed by the invention has the advantages that the closing time can be effectively prolonged, the dosage is reduced, and the prevention and treatment spectrum is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of herbicides, and in particular to a herbicidal composition containing pyraclostrobin, prometryn and fluazifop, and a herbicide and application thereof. Background Art

[0002] Pyroxasulfone is a new type of broad-spectrum, highly active pre-emergence soil treatment agent developed by Kumizu Chemical Co., Ltd. of Japan. Its mechanism of action is a very long-chain fatty acid elongation synthase inhibitor. After application, it is absorbed by the young roots or shoots of weeds, inhibits the biosynthesis of very long-chain fatty acid elongation synthase, and causes the construction of fatty acid precursor substances, which can inhibit the early growth of seedlings and destroy meristems and coleoptiles to exert its efficacy. Pyroxasulfone is applicable to a wide range of crops, including corn, soybeans, cotton, wheat, sunflowers, potatoes, peanuts and other crops, and effectively controls grass weeds such as foxtail, crabgrass, barnyard grass, and broad-leaved weeds such as amaranth and sophora japonica.

[0003] Prometryn is a triazine systemic herbicide developed by Geigy, Switzerland. It can be absorbed from the roots or penetrate into the body from the stems and leaves. It is transported to the green leaves to inhibit photosynthesis, inhibit the biosynthesis of chlorophyll and the destruction of the plasma membrane, inhibit the biosynthesis of carotenoids; inhibit the synthesis of amino acids, nucleic acids and proteins; inhibit the synthesis of lipids. Poisoned weeds produce chlorosis symptoms and gradually dry up and die. Prometryn has the best control effect on newly sprouted weeds and has a wide spectrum of weed control. It can control annual grass weeds and broad-leaved weeds. It mainly acts on cotton, soybeans, peanuts, rice, sugarcane and other crop fields.

[0004] Flumioxazin is a contact selective herbicide developed by Sumitomo Chemical of Japan. It is a protoporphyrinase inhibitor. Its mechanism of action is that after treatment with flumioxazin, protoporphyrin accumulates in the body of sensitive plants, leading to photosensitivity and peroxidation of cell membrane lipids, which causes irreversible damage to the function and structure of the cell membrane, thus causing the death of weeds. Flumioxazin can be used to control many difficult-to-control malignant weeds, such as Amaranthus retroflexus, Purslane, Amaranthus ferox, Solanum nigrum, Erigeron candidum, Chenopodium album and other malignant weeds. It mainly acts on garlic fields, soybean fields, spring soybean fields, citrus orchards, cotton fields, corn fields, peanut fields, non-arable land, etc.

[0005] Herbicide varieties containing a single active ingredient often have defects of varying degrees in agricultural weed control, such as a narrow weed control spectrum, weeds are prone to develop resistance after continuous use, and frequent use will aggravate environmental pollution. Common compound products are used in large quantities; product quality is unstable and easily affected by environmental changes during maritime transportation. High temperatures are prone to agglomeration, paste formation, particle size growth, and water precipitation. Low temperatures have the risk of crystallization, which seriously affects the efficacy.

[0006] Therefore, it is of great value to develop a composition containing pyraclostrobin, promethazine and fluazifop and a herbicide thereof which can improve the weed control effect. Summary of the invention

[0007] The purpose of the present invention is to provide a herbicidal composition containing pyraclostrobin, prometryn and fluazifop, and a herbicide and application thereof in view of the deficiencies in the prior art.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: The present invention provides a herbicide, comprising an active ingredient and an adjuvant; the active ingredient is a herbicide composition containing pyraclostrobin, promethazine and fluazifop, and the mass content of the active ingredient is 1-80%; The mass ratio of pyraclostrobin, promethazine and fluazifop-butyl is 1-20:1-50:1-20; The herbicide is in the form of a suspension concentrate, water dispersible granules, emulsifiable concentrate, suspoemulsion or dispersible oil suspension.

[0009] Preferably, the mass ratio of pyraclostrobin, prometryn and fluazifop-butyl is 1-20:10-50:1-10.

[0010] The present invention also provides a herbicide, comprising an active ingredient and an adjuvant; the active ingredient is the herbicidal composition containing pyraclostrobin, promethazine and fluazifop, and the mass content of the active ingredient is 1-80%.

[0011] Preferably, the auxiliary agent comprises one or more of a surfactant, a carrier, a wetting agent, an emulsifier, a dispersant, a defoaming agent, a disintegrant, a synergist, a thickener, an antifreeze agent, a preservative and a solvent.

[0012] Preferably, the herbicide is in the form of a suspension concentrate, water dispersible granules, wettable powder, emulsifiable concentrate, suspoemulsion or dispersible oil suspension.

[0013] Preferably, the surfactant comprises one or more of alkyl sulfonates, sodium alkylnaphthalene sulfonates, alkylphenol polyoxyethylene ethers, sodium dodecyl sulfate, calcium dodecylbenzene sulfonate, sodium dodecylbenzene sulfonate, lignin sulfonates, carboxymethyl cellulose, tristyrylphenol polyoxyethylene ethers, fatty alcohol ethoxylates, castor oil ethoxylates and amine ethoxylates; The carrier comprises one or more of white carbon black, kaolin, diatomaceous earth, bentonite, light calcium carbonate, gypsum, attapulgite, clay, soluble starch and urea.

[0014] Preferably, the wetting agent comprises one or more of fatty alcohol sulfate, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, polyoxyethylene-polyoxypropylene block polymer, sodium alkylbenzene sulfonate, alkyl succinate sulfonate, lignin sulfonate, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene ether formaldehyde condensate and saponin; The emulsifier comprises one or more of castor oil polyoxyethylene ether, alkylphenol polyoxyethylene ether phosphate, phenylphenol polyoxyethylene ether, styrylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylbenzene sulfonate; The dispersant comprises one or more of lignin sulfonate, alkylbenzene sulfonate, alkylphenol polyoxyethylene ether, alkylnaphthalene sulfonate, N-methyl fatty acyl-taurate, alkylphenol polyoxyethylene ether formaldehyde condensate, alkylbenzene sulfonate, naphthalene sulfonate formaldehyde condensate sodium salt, polycarboxylate and fatty amine polyoxyethylene ether; The defoaming agent is a silicone defoaming agent.

[0015] Preferably, the synergist comprises one or more of ethoxy-modified polytrisiloxane, fatty alcohol polyoxyethylene ether and diisooctyl succinate sulfonate; The thickener comprises one or more of xanthan gum, gelatin, gum arabic, guar gum, sodium alginate, sodium hydroxymethyl cellulose, polyvinyl alcohol, polyacrylamide, meteorological white carbon black, magnesium aluminum sulfate, magnesium aluminum silicate, diatomaceous earth and organic bentonite; The antifreeze agent comprises one or more of propylene glycol, ethylene glycol and glycerol.

[0016] The present invention also provides the herbicidal composition containing pyraclostrobin, prometryn and fluazifop or the use of the herbicide in controlling annual weeds.

[0017] The beneficial effects of the present invention include the following: 1) The herbicidal composition of the present invention includes the active ingredients pyraclostrobin, promethazine, and fluazifop-butyl; the combination of the three active ingredients has a significant synergistic effect, and the composition has a significant blocking effect on weeds in soybean fields without affecting the normal growth of soybeans. Compared with binary mixed agents, the ternary herbicidal composition of the present invention can effectively increase the blocking time, reduce the dosage, and expand the control spectrum. The three components of the herbicidal composition of the present invention have different mechanisms of action and can delay the development of weed resistance, so it has broad development prospects in the market.

[0018] 2) The present invention rationally selects auxiliary agents such as dispersants, wetting agents, and carriers, and ultimately obtains a herbicide with a relatively high content and excellent performance in terms of water dispersibility, stability over time, and other aspects. DETAILED DESCRIPTION

[0019] The present invention provides a herbicide, comprising an active ingredient and an adjuvant; the active ingredient is a herbicide composition containing pyraclostrobin, promethazine and fluazifop, and the mass content of the active ingredient is 1-80%; The mass ratio of pyraclostrobin, promethazine and fluazifop-butyl is 1-20:1-50:1-20; The herbicide is in the form of a suspension concentrate, water dispersible granules, emulsifiable concentrate, suspoemulsion or dispersible oil suspension.

[0020] In the present invention, the mass ratio of pyraclostrobin, prometryn and fluazifop is preferably 1-20:10-50:1-10, more preferably 3-15:15-35:1-5, and more preferably 5:20:1.

[0021] The present invention also provides a herbicide, comprising an active ingredient and an adjuvant; the active ingredient is the herbicidal composition containing pyraclostrobin, promethazine and fluazifop, and the mass content of the active ingredient is 1-80%.

[0022] In the herbicide of the present invention, the mass content of the active ingredient is preferably 10 to 60%, more preferably 20 to 40%, and even more preferably 26 to 30%.

[0023] In the present invention, the auxiliary agent preferably comprises one or more of a surfactant, a carrier, a wetting agent, an emulsifier, a dispersant, a defoaming agent, a disintegrant, a synergist, a thickener, an antifreeze agent, a preservative and a solvent.

[0024] In the present invention, the dosage form of the herbicide is preferably a suspension concentrate, water dispersible granules, wettable powder, emulsifiable concentrate, suspoemulsion or dispersible oil suspension.

[0025] In the present invention, the surfactant preferably comprises one or more of alkyl sulfonates, sodium alkylnaphthalene sulfonates, alkylphenol polyoxyethylene ethers, sodium dodecyl sulfate, calcium dodecylbenzene sulfonate, sodium dodecylbenzene sulfonate, lignin sulfonates, carboxymethyl cellulose, tristyrylphenol polyoxyethylene ethers, fatty alcohol ethoxylates, castor oil ethoxylates and amine ethoxylates; The carrier preferably comprises one or more of white carbon black, kaolin, diatomaceous earth, bentonite, light calcium carbonate, gypsum, attapulgite, clay, soluble starch and urea.

[0026] In the present invention, the wetting agent preferably comprises one or more of fatty alcohol sulfate, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, polyoxyethylene-polyoxypropylene block polymer, sodium alkylbenzene sulfonate, alkyl succinate sulfonate, lignin sulfonate, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene ether formaldehyde condensate and saponin; The emulsifier preferably comprises one or more of castor oil polyoxyethylene ether, alkylphenol polyoxyethylene ether phosphate, phenylphenol polyoxyethylene ether, styrylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylbenzene sulfonate; The dispersant preferably comprises one or more of lignin sulfonate, alkylbenzene sulfonate, alkylphenol polyoxyethylene ether, alkylnaphthalene sulfonate, N-methyl fatty acyl-taurate, alkylphenol polyoxyethylene ether formaldehyde condensate, alkylbenzene sulfonate, naphthalene sulfonate formaldehyde condensate sodium salt, polycarboxylate and fatty amine polyoxyethylene ether; The defoaming agent is preferably a silicone defoaming agent.

[0027] In the present invention, the synergist preferably comprises one or more of ethoxy-modified polytrisiloxane, fatty alcohol polyoxyethylene ether and diisooctyl succinate sulfonate; The thickener preferably comprises one or more of xanthan gum, gelatin, gum arabic, guar gum, sodium alginate, sodium hydroxymethyl cellulose, polyvinyl alcohol, polyacrylamide, meteorological white carbon black, magnesium aluminum sulfate, magnesium aluminum silicate, diatomaceous earth and organic bentonite; The antifreeze agent preferably comprises one or more of propylene glycol, ethylene glycol and glycerol.

[0028] In the present invention, the solvent preferably comprises one or more of methyl oleate, aromatic solvent S-100, aromatic solvent S-150, aromatic solvent S-200, xylene, trimethylbenzene, methylnaphthalene, cyclohexanone, corn oil, soybean oil, rapeseed oil, peanut oil and water.

[0029] The present invention also provides the herbicidal composition containing pyraclostrobin, prometryn and fluazifop or the use of the herbicide in controlling annual weeds.

[0030] In the present invention, the annual weeds are preferably grass weeds and broadleaf weeds, and more preferably grass weeds and broadleaf weeds in soybean fields.

[0031] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0032] Example 1 Active ingredients with a mass content of 26% (the mass ratio of pyraclostrobin, promethazine and fluazifop is 5:20:1), 5% styrylphenol polyoxyethylene ether, 2% fatty alcohol polyoxyethylene ether, 5% ethylene glycol, 1% magnesium aluminum silicate, 0.1% xanthan gum and water (water is added to 100%) are added into a stirring tank for stirring. After uniform mixing, the material is sand-milled to make the average particle size D90 of the material less than 10 μm to obtain a suspension concentrate with an active ingredient content of 26%.

[0033] Example 2 The mass ratio of pyraclostrobin, prometryn and fluazifop-butyl in Example 1 was changed to 60:360:18, the mass content of fluazifop-butyl in the suspension was 1%, and the other conditions were the same as in Example 1.

[0034] Example 3 The mass ratio of pyraclostrobin, prometryn and fluazifop-butyl in Example 1 was changed to 60:360:30, the mass content of fluazifop-butyl in the suspension was 1.67%, and the other conditions were the same as in Example 1.

[0035] Example 4 The mass ratio of pyraclostrobin, prometryn and fluazifop in Example 1 was changed to 60:562.5:18, the mass content of fluazifop in the suspension was 1%, and the other conditions were the same as in Example 1.

[0036] Example 5 The mass ratio of pyraclostrobin, prometryn and fluazifop-butyl in Example 1 was changed to 60:562.5:30, and the mass content of fluazifop-butyl in the suspension was 1.67%. Other conditions were the same as in Example 1.

[0037] Example 6

[0038] The mass ratio of pyraclostrobin, prometryn and fluazifop-butyl in Example 1 was changed to 90:360:30, the mass content of fluazifop-butyl in the suspension was 1.67%, and the other conditions were the same as in Example 1.

[0039] Example 7

[0040] The mass ratio of pyraclostrobin, prometryn and fluazifop-butyl in Example 1 was changed to 90:562.5:18, the mass content of fluazifop-butyl in the suspension was 1%, and the other conditions were the same as in Example 1.

[0041] Example 8

[0042] The mass ratio of pyraclostrobin, prometryn and fluazifop-butyl in Example 1 was changed to 90:562.5:30, and the mass content of fluazifop-butyl in the suspension was 1.67%. Other conditions were the same as in Example 1.

[0043] Example 9

[0044] The active ingredients with a mass content of 65% (the mass ratio of pyraclostrobin, promethazine, and fluazifop-butyl is 20:40:5), 6% polycarboxylate, 5% sodium alkylnaphthalene sulfonate, 4% diisooctyl succinate sulfonic acid, and kaolin (kaolin is added to 100%) are mixed evenly. The mixed materials are crushed to obtain a mother powder with an average particle size D90 of less than 210 μm, and the mother powder is extruded and granulated (the mesh size is 1 mm) with water, and then boiled and dried at 60°C to obtain a water-dispersible granule with an active ingredient content of 65%.

[0045] Example 10

[0046] Mix 70% active ingredients (the mass ratio of pyraclostrobin, promethazine, and fluazifop-butyl is 15:50:5), 4% sodium alkylnaphthalene sulfonate, 4% lignin sulfonate, 4% white carbon black, 2% fatty alcohol sulfate, and kaolin (kaolin is added to 100%). The mixed materials are crushed to make the average particle size D90 of the materials less than 210 μm, and a wettable powder with an active ingredient content of 70% is obtained.

[0047] Embodiment 11

[0048] The active ingredients with a mass content of 20% (the mass ratio of sulfonepyraclostrobin, promethazine, and fluazifop-butyl is 8:10:2), 5% dioctyl succinate sulfonate, 5% fatty alcohol polyoxyethylene ether, 10% castor oil polyoxyethylene ether, 1% organic bentonite and methyl oleate (methyl oleate is added to 100%) are mixed evenly. The material is sand-milled to make the average particle size D90 of the material less than 10 μm, and a dispersible oil suspension with an active ingredient content of 20% is obtained.

[0049] Example 12

[0050] Mix the following: active ingredients with a mass content of 26% (the mass ratio of pyraclostrobin, promethazine and fluazifop is 5:20:1), 20% cyclohexanone, 6% styrylphenol polyoxyethylene ether, 4% alkylbenzene sulfonate and aromatic solvent S-150 (S-150 is added to 100%), stir for 1 hour to completely dissolve, and obtain a transparent liquid emulsifiable concentrate with an active ingredient content of 26%.

[0051] Application Example 1 The suspension concentrates of Examples 1 to 8 were used to conduct indoor bioassays on soybean field weeds (Digitaria sanguinalis, Echinochloa crusgalli, Amaranthus retroflexus, and Fennel).

[0052] Test method: Use greenhouse potting method, test soil is special test soil (soil plot without any pesticides), put the special test soil into the flower pot, place the flower pot in a basin of water, and use the bottom of the pot to keep the soil moist. Sow 30 seeds of crabgrass, barnyard grass, Amaranthus retroflexus, and fennel in the flower pot, cover with 0.5cm of soil after sowing, and plant at the 2-leaf 1-core stage. Keep 20 weed plants with the same growth potential in each pot and wait until they grow to 5 leaves. Prepare a single agent (the dosage of sulfonepyraclostrobin is 60g ai / hm 2 、90g ai / hm 2 ; The dosage of prometryn is 360g ai / hm 2 、562.5g ai / hm 2 ; The dosage of fluazifop-butyl was 18 g ai / hm 2 、30g ai / hm 2 ) and the suspension of Examples 1 to 8, each group of agents treating one weed is a treatment group, a single agent is 24 treatment groups, Examples 1 to 8 correspond to 32 treatment groups, a total of 56 treatment groups, and the stem and leaf spray treatment is carried out using a potter spray device, and each treatment group is repeated 3 times. After treatment, the greenhouse is placed for normal management, the growth of weed plants is observed regularly, and the fresh weight of the aboveground part is weighed after 21 days to calculate the fresh weight inhibition rate. According to NY / T1155.7-2006 "Pesticide Indoor Test Guidelines Herbicides Part 7-Determination of Combined Effects of Mixtures", the Colby method is used, as shown in Formula 1. Wherein, E0 refers to the weed control effect of sulfonepyraclostrobin + the weed control effect of promethazine + the weed control effect of fluazifop-butyl; E refers to the actual control effect of the herbicide; E-E0≥10% is a synergistic effect; E-E0≤-10% is an antagonistic effect; -10%≤E-E0≤10% is an additive effect.

[0053] Formula 1 In formula 1, the fresh weight control effect of X-sulfonepyraclostrobin when the dosage of P is 60 g ai / hm 2 、90ga.i. / hm 2 ; Y-promethazine fresh weight control effect when the dosage is Q, the dosage of Q is 360g ai / hm 2 、562.5g ai / hm 2 ; Fresh weight control effect of Z-fluamidazole at the dosage of R, the dosage of R was 18g ai / hm 2 、30g ai / hm 2 ; The results of the activity test of pyraclostrobin, prometryn and fluazifop-butyl single agents and the suspension concentrates of Examples 1 to 8 on crabgrass, barnyard grass, Amaranthus retroflexus and foenum-bucil are shown in Tables 1 to 4, respectively.

[0054] Table 1 Activity test of single agent and suspension concentrate of the examples against Digitaria

[0055] Table 2 Activity test of single agent and suspension concentrate of the examples against barnyard grass

[0056] Table 3 Activity determination of single agent and suspension concentrate of the examples on Amaranthus retroflexus

[0057]

[0058] Table 4 Activity determination of single dose and suspension of the examples on fennel

[0059] It can be seen from Tables 1 to 4 that the E-E0 values ​​of the suspension concentrate of Example 1 on crabgrass, barnyard grass, Amaranthus retroflexus, and fennel are all greater than 10%, showing a significant synergistic effect and having the feasibility of compounding.

[0060] The suspension concentrate of Example 1 and the emulsifiable concentrate of Example 12 were tested for suspension rate and heat storage stability. The results are shown in Table 5.

[0061] Table 5 Activity and thermal storage stability test results

[0062] As shown in Table 5, the suspension concentrate of the present invention has good heat storage stability, high suspension rate and ideal dosage form.

[0063] Application Example 2 The suspension concentrate of Example 1 and the control agent were subjected to field efficacy tests in paddy fields according to the pesticide field efficacy test criteria. The test was conducted in Fengyang County, Bengbu City, Anhui Province. Digitaria, barnyard grass, Amaranthus retroflexus, and fennel were all present in the field weed phase. The spray was applied on the stems and leaves at the 1-2 leaf stage of rice and the 3-5 leaf stage of weeds. The water content was 50 L / mu. Each plot was 100 square meters. Each agent was repeated 3 times. The weed control effect and safety to rice were tested 20 days after the application. The test results are shown in Table 6.

[0064] Table 6 The control effect of suspension concentrate and control agent on weeds and their safety to rice in rice fields

[0065] The results of the field test showed that, considering the cost, efficacy, safety and other aspects, the dosage of the suspension concentrate of 26% of the active ingredient in Example 1 was 1800 g ai / hm 2 The best ratio is .

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A herbicide, characterized in that: It comprises active ingredients and adjuvants; the active ingredient is a herbicidal composition containing pyraclostrobin, promethazine and fluazifop-butyl, and the mass content of the active ingredient is 1-80%; The mass ratio of pyraclostrobin, promethazine and fluazifop-butyl is 1-20:1-50:1-20; The herbicide is in the form of a suspension concentrate, water dispersible granules, emulsifiable concentrate, suspoemulsion or dispersible oil suspension.

2. The herbicide according to claim 1, characterized in that The mass ratio of pyraclostrobin, promethazine and fluazifop-butyl is 1~20:10~50:1~10.

3. The herbicide according to claim 1, characterized in that The auxiliary agent comprises one or more of a surfactant, a carrier, a wetting agent, an emulsifier, a dispersant, a defoaming agent, a disintegrant, a synergist, a thickener, an antifreeze agent, a preservative and a solvent.

4. The herbicide according to claim 3, characterized in that The surfactant comprises one or more of alkyl sulfonate, sodium alkylnaphthalene sulfonate, alkylphenol polyoxyethylene ether, sodium dodecyl sulfate, calcium dodecylbenzene sulfonate, sodium dodecylbenzene sulfonate, lignin sulfonate, carboxymethyl cellulose, tristyrylphenol polyoxyethylene ether, fatty alcohol ethoxylate, castor oil ethoxylate and amine ethoxylate; The carrier comprises one or more of white carbon black, kaolin, diatomaceous earth, bentonite, light calcium carbonate, gypsum, attapulgite, clay, soluble starch and urea.

5. The herbicide according to claim 3, characterized in that The wetting agent comprises one or more of fatty alcohol sulfate, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, polyoxyethylene-polyoxypropylene block polymer, sodium alkylbenzene sulfonate, alkyl succinate sulfonate, lignin sulfonate, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene ether formaldehyde condensate and saponin; The emulsifier comprises one or more of castor oil polyoxyethylene ether, alkylphenol polyoxyethylene ether phosphate, phenylphenol polyoxyethylene ether, styrylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylbenzene sulfonate; The dispersant comprises one or more of lignin sulfonate, alkylbenzene sulfonate, alkylphenol polyoxyethylene ether, alkylnaphthalene sulfonate, N-methyl fatty acyl-taurate, alkylphenol polyoxyethylene ether formaldehyde condensate, naphthalene sulfonate formaldehyde condensate sodium salt, polycarboxylate and fatty amine polyoxyethylene ether; The defoaming agent is a silicone defoaming agent.

6. The herbicide according to claim 3, characterized in that The synergist comprises one or more of ethoxy-modified polytrisiloxane, fatty alcohol polyoxyethylene ether and diisooctyl succinate sulfonate; The thickener comprises one or more of xanthan gum, gelatin, gum arabic, guar gum, sodium alginate, sodium hydroxymethyl cellulose, polyvinyl alcohol, polyacrylamide, meteorological white carbon black, magnesium aluminum sulfate, magnesium aluminum silicate, diatomaceous earth and organic bentonite; The antifreeze agent comprises one or more of propylene glycol, ethylene glycol and glycerol.

7. Use of the herbicide according to any one of claims 1 to 6 in controlling annual weeds.

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