Herbicidal composition containing icafolin and use thereof

Abstract

The application belongs to the technical field of pesticide weeding, and discloses a weeding composition containing icafolin and application thereof, wherein the active ingredient of the weeding composition comprises active ingredient A and active ingredient B; the active ingredient A is icafolin; the active ingredient B is any one of pyraflufen-ethyl or fomesafen; and the mass ratio of the active ingredient A to the active ingredient B is 3:64-48:1. The weeding composition disclosed by the application expands the weed spectrum, has excellent control effect on annual weeds in wheat fields and soybean fields, is safe to crops, and is friendly to the environment.

Description

Technical Field

[0001] This invention belongs to the field of pesticide weeding technology, and discloses a weeding composition containing icafolin and its application. Background Technology

[0002] Pyraflufen-ethyl, chemically known as ethyl 2-chloro-5-(4-chloro-5-difluoromethoxy-1-methylpyrazol-3-yl)-4-fluorophenoxyethyl, and traded under names such as Sucaolin, Danmiaoyao, and Pyraflufen-ethyl, was developed by Nohyaku Co., Ltd. of Japan. It is a novel phenylpyrazole post-emergence contact herbicide. Its mechanism of action is to inhibit protoporphyrin IV oxidase in plants. By taking advantage of the differences in herbicide absorption and metabolism between wheat and weeds, it can selectively control broadleaf weeds in wheat fields and can also effectively promote defoliation in mature cotton.

[0003] Flusulfanil is a highly selective post-emergence herbicide for soybean and peanut fields. It effectively controls broadleaf weeds and nutgrass in soybean and peanut fields, and also has some control effect on grass weeds.

[0004] The mixing of different herbicides offers advantages such as broad-spectrum weed control, improved efficacy, delayed weed resistance development, and time and labor savings. Through pesticide formulation screening, control effects can be effectively improved, pesticide dosage reduced, costs lowered, and the development of herbicide resistance in diseases, insects, and weeds delayed, making it an important means of integrated agricultural management. The inventors of this invention conducted in-depth research on formulations of icafolin mixed with any one of pyrazosulfuron or flusulfanilamide, discovering that cyclic icafolin mixed with any one of pyrazosulfuron or flusulfanilamide, within a certain mixing ratio range, has a synergistic effect on weed control in soybean or wheat fields. Further research led to the completion of this invention. Summary of the Invention

[0005] Based on the above, the purpose of this invention is to provide a herbicidal composition in which the active ingredient comprises icafolin and either pyrazosulfuron or flusulfanilamide. This herbicidal composition broadens the spectrum of weed control and has excellent control effects on common broadleaf weeds, grass weeds and sedges in wheat and soybean fields, and is safe for crops.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a herbicidal composition containing icafolin, wherein the active ingredients of the herbicidal composition include active ingredient A and active ingredient B, wherein active ingredient A is icafolin, and active ingredient B is either pyrazosulfuron or flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 1:11 to 48:1.

[0007] Furthermore, the active ingredient B is pyrazosulfan, and the mass ratio of active ingredient A to active ingredient B is 1:1 to 48:1, or any value within the above range.

[0008] Furthermore, the active ingredient B is pyrazosulfan, and the mass ratio of active ingredient A to active ingredient B is 12:2 (6:1), 12:4 (3:1), 12:8 (1.5:1), 12:10 (1.2:1), 12:12 (1:1), 24:2 (12:1), 48:2 (24:1), 96:2 (48:1), or any value between the above values;

[0009] Furthermore, the active ingredient B is pyrazosulfan, and the mass ratio of active ingredient A to active ingredient B is 1.2:1 to 24:1, or any value within the above range.

[0010] Furthermore, the active ingredient B is pyrazosulfan, and the mass ratio of active ingredient A to active ingredient B is 12:2 (6:1), 12:4 (3:1), 12:8 (1.5:1), 12:10 (1.2:1), 24:2 (12:1), 48:2 (24:1), or any value between the above values;

[0011] Furthermore, the active ingredient B is flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 3:32 to 12:1, or any value within the above range.

[0012] Furthermore, the active ingredient B is flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 12:16 (3:4), 12:32 (3:8), 12:64 (3:16), 12:128 (3:32), 24:16 (1.5:1), 48:16 (3:1), 96:16 (6:1), 192:16 (12:1), or any value between the above values;

[0013] Furthermore, the active ingredient B is flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 3:16 to 6:1, or any value within the above range.

[0014] Furthermore, the active ingredient B is flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 12:16 (3:4), 12:32 (3:8), 12:64 (3:16), 24:16 (1.5:1), 48:16 (3:1), 96:16 (6:1), or any value between the above values;

[0015] Furthermore, the total weight of the herbicidal composition is 100 wt%, and the total weight of active ingredient A and active ingredient B accounts for 0.01% to 80% of the herbicidal composition.

[0016] Furthermore, the herbicidal composition contains other auxiliary ingredients in addition to the active ingredients, and the auxiliary ingredients are selected from one or more of the following: wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists or carriers.

[0017] Furthermore, the formulation of the herbicidal composition is prepared in the form of a solid formulation and / or a liquid formulation.

[0018] Furthermore, the solid dosage form is selected from powders, granules, balls, tablets, strips, wettable powders, oil-dispersible powders, emulsion powders, water-dispersible granules, emulsion granules, water-dispersible tablets, soluble powders, soluble tablets, or soluble granules;

[0019] Furthermore, the liquid formulation is selected from soluble agents, colloids, oils, spreading oils, emulsions, latexes, dispersible liquids, ointments, water emulsions, oil emulsions, microemulsions, lipid suspensions, microcapsule suspensions, oil suspensions, dispersible oil suspensions, suspensions, microcapsule suspension-suspension agents, microcapsule suspension-water emulsions, or microcapsule suspension-suspension emulsions;

[0020] Furthermore, the solid formulation is a water-dispersible granule or a wettable powder, and the liquid formulation is a suspension, emulsifiable concentrate, or microemulsion.

[0021] The present invention also discloses the application of the herbicidal composition described above for controlling unwanted plants.

[0022] Furthermore, the unwanted plants are broadleaf weeds, grass weeds, and / or sedge weeds.

[0023] Furthermore, the unwanted plant growing locations are wheat fields or soybean fields.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The herbicidal composition provided by this invention can effectively control various common weeds, even resistant weeds, in wheat or soybean fields, and delay the development of herbicide resistance in weeds;

[0026] 2. The herbicidal composition of the present invention broadens the spectrum of weed control, exhibiting excellent activity against grassy weeds, sedges, and broadleaf weeds. It overcomes the problem of narrow spectrum control of single herbicides, has a long residual effect, is safe for crops, and can reduce the dosage of pesticides and reduce the cost of pesticide application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Preparation Example 1: 14% icafolin·pyrazosulfan suspension (6:1)

[0029] Formula composition: 12% icafolin, 2% imidacloprid, 1% fatty alcohol polyoxyethylene ether, 1% sodium polycarboxylate, 1% naphthalene sulfonate formaldehyde condensate, 4% octylphenol polyoxyethylene ether phosphate, 0.3% xanthan gum, 1% magnesium aluminum silicate, 5% glycerol, 0.01% potassium benzisothiazolinone, 0.5% silicone oil, deionized water to make up the balance;

[0030] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, water is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling and finally homogenization filtration to obtain the suspension product.

[0031] Preparation Example 2: 16% icafolin·pyrazosulfan suspension (3:1)

[0032] Formula composition: 12% icafolin, 4% imidacloprid, 1% isotridecyl alcohol polyoxyethylene ether, 5% styrene-phenol polyoxyethylene ether phosphate, 1% lignosulfonate, 3% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 0.25% xanthan gum, 1% magnesium aluminum silicate, 5% propylene glycol, 0.1% sodium benzoate, 0.5% silicone oil, deionized water to make up the balance;

[0033] Preparation method: Same as in preparation example 1.

[0034] Preparation Example 3: 12.5% ​​icafolin·pyrazosulfan microemulsion (1.5:1)

[0035] Formula composition: 7.5% icafolin, 5% imidacloprid, 12% castor oil polyoxyethylene ether, 5% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 2% octylphenol polyoxyethylene ether phosphate, 1% calcium dodecylbenzenesulfonate, 3% xylene, 20% cyclohexanone, 5% ethylene glycol, 0.5% glycerin, deionized water to make up the balance;

[0036] Preparation method: According to the formulation ratio in the example, the active ingredients, solvent, emulsifier, etc. are mixed evenly to obtain the oil phase, the antifreeze is mixed evenly with water to obtain the aqueous phase, the oil phase is added to the aqueous phase under stirring and stirred evenly, and shearing is continued for 10 minutes. Then, the defoamer is added and stirred evenly to obtain small droplets with oil phase particles of 0.01-0.1 micrometers, which is the microemulsion product.

[0037] Preparation Example 4: 13.2% icafolin·pyrazosulfan microemulsion (1.2:1)

[0038] Formula composition: 7.2% icafolin, 6% imidacloprid, 10% styrene-phenol polyoxyethylene ether, 5% glycerol fatty acid ester polyoxyethylene ether, 1% octylphenol polyoxyethylene ether phosphate, 1% sodium lauryl sulfate, 2% xylene, 22% cyclohexanone, 4% glycerol, 0.5% glycerol, deionized water to make up the balance;

[0039] Preparation method: Same as in preparation example 3.

[0040] Preparation Example 5: 35% icafolin·pyrazosulfan suspension (1:1)

[0041] Formula composition: 17.5% icafolin, 17.5% imidacloprid, 2% sorbitol polyoxyethylene ether, 2% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 2% naphthalene sulfonate formaldehyde condensate, 5% arylphenol polyoxyethylene ether phosphate, 1.5% magnesium aluminum silicate, 0.15% carboxyethyl cellulose, 1% sodium sorbate, 5% ethylene glycol, 0.5% silicone oil, deionized water to make up the balance;

[0042] Preparation method: Same as in preparation example 1.

[0043] Preparation Example 6: 26% icafolin·pyrazosulfan suspension (12:1)

[0044] Formula composition: 24% icafolin, 2% imidacloprid, 2% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 1% naphthalene sulfonate formaldehyde condensate, 4% alkylphenol polyoxyethylene ether phosphate, 1% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 0.25% xanthan gum, 1% magnesium aluminum silicate, 5% propylene glycol, 0.25% potassium benzoate, 0.5% silicone oil, deionized water to make up the balance;

[0045] Preparation method: Same as in preparation example 1.

[0046] Preparation Example 7: 25% icafolin·pyrazosulfan suspension (24:1)

[0047] Formula composition: 24% icafolin, 1% pyrazosulfan, 3% fatty alcohol polyoxyethylene ether, 5% alkylphenol polyoxyethylene ether phosphate, 1% sodium polycarboxylate, 0.25% xanthan gum, 1% magnesium aluminum silicate, 5% ethylene glycol, 0.1% sodium benzoate, 0.5% silicone oil, deionized water to make up the balance;

[0048] Preparation method: Same as in preparation example 1.

[0049] Preparation Example 8: 34.5% icafolin·flufenazate soluble concentrate (3:2)

[0050] Formula composition: 20.7% icafolin, 13.8% flufenoxuron, 5.5% triethylamine, 14% ethanol, 13% glycerol fatty acid ester polyoxyethylene ether, 18% cyclohexanone, DMF to make up the balance;

[0051] Preparation method: Add the active ingredients to the solvent according to the formula ratio, and add surfactants and other functional additives to it. Stir and mix evenly in a stirring mixing tank to obtain the soluble product.

[0052] Preparation Example 9: 19% icafolin·flufenazate EC (3:16)

[0053] Formula composition: 3% icafolin, 16% flufenoxuron, 5.5% triethylamine, 20% N-methylpyrrolidone, 15% ethylene glycol oxyethylene polyoxypropylene ether, 2% calcium dodecylbenzenesulfonate, 10% DMF, methyl oleate to make up the balance;

[0054] Preparation method: According to the formula ratio, the measured active ingredients and solvents are added to the mixing tank and stirred to dissolve them. Then, the emulsifier is added, and the remaining solvent is used to make up the balance. The mixture is stirred evenly in the mixing tank and filtered to obtain the emulsifiable oil required by the present invention.

[0055] Preparation Example 10: 35% icafolin·flufenazate microemulsion (3:32)

[0056] Formula composition: 3% icafolin, 32% flufenoxuron, 2.2% triethylamine, 20% cyclohexanone, 10% alkylphenol polyoxyethylene ether, 5% sorbitan oleate polyoxyethylene ether, 2% sodium alkyl polyoxyethylene ether sulfonate, 0.05% silicone defoamer, deionized water to make up the balance;

[0057] Preparation method: Same as in preparation example 3.

[0058] Preparation Example 11: 25% icafolin·flufenazate dispersible oil suspension (1.5:1)

[0059] Formula composition: 15% icafolin, 10% flufenoxuron, 2% lignin sulfonate, 15% glycerol fatty acid ester polyoxyethylene ether, 3% fatty alcohol polyoxyethylene ether, 2% calcium dodecylbenzene sulfonate, 1% silica, 22% 200# solvent oil, methyl oleate to make up the balance;

[0060] Preparation method: According to the formula ratio, the active ingredient and other functional additives are placed in the reaction vessel in sequence, oil is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling, and finally homogenized filtration to obtain the dispersible oil suspension product.

[0061] Preparation Example 12: 52% icafolin·flufenoxam water-dispersible granules (12:1)

[0062] Formula composition: 48% icafolin, 4% flufenoxuron, 10% sodium lignosulfonate, 3% BX (a type of oxychloride), 2% sodium lauryl sulfate, 5% white sugar, and kaolin to make up the balance;

[0063] Preparation method: According to the formulation ratio in the example, add the active ingredient to the carrier, and add surfactants and other functional additives therein, mix, and after air jet pulverization, add 10-25% water, and then knead, granulate, dry and sieve to obtain water-dispersible granules; or spray water, granulate and dry the pulverized powder in a fluidized bed granulator, and then sieve to obtain the product.

[0064] Example 1: Indoor Bioactivity Assay

[0065] Test basis: The test was conducted in accordance with NY / T-1155.4-2006 "Guidelines for Indoor Bioassay Tests of Pesticides - Herbicides - Part 4: Activity Assay Tests - Foliar Spray Method".

[0066] Experimental targets: wild oats, shepherd's purse, cleavers, foxtail grass, barnyard grass, velvetleaf, shepherd's purse, and cyperus.

[0067] Instruments and equipment: light incubator, quantitative spray equipment, electronic balance, pots and pans, pipettes, etc.;

[0068] Test soil: The test used air-dried loam with organic matter content ≤3%, neutral pH, good air permeability, and sieved.

[0069] Experimental materials: A measured amount of soil was filled to 4 / 5 of the pot, and then watered from the bottom of the pot until the soil was completely saturated. Pretreated weed seeds were evenly sown on the soil surface, covered with 0.5cm–2cm of soil depending on seed size. After sowing, the plants were moved to a greenhouse for conventional cultivation, with watering provided from the bottom. After emergence, thinning was performed to control weed density.

[0070] Test agents: icafolin technical grade, pyrazosulfuron technical grade, flusulfanilamide technical grade.

[0071] Preparation of the drug: Dissolve the above raw materials in a suitable solvent, and then dilute with a 0.1% Tween 80 aqueous solution.

[0072] Chemical treatment: Foliar spraying was performed according to the experimental design, from low to high doses. Each treatment was replicated four times, with a control group (no chemical treatment) included. After treatment, the surface of the test materials was allowed to air dry naturally before being transferred to a greenhouse for routine cultivation.

[0073] Survey: Weed control activity was investigated and recorded using the absolute value survey method 14 days after treatment.

[0074] Calculation method:

[0075] Fresh weight control efficacy E = (fresh weight of control area - fresh weight of treatment area) × 100 / fresh weight of control area

[0076] The combined effects of the mixtures were determined using the Gowing method, and the calculation formula is as follows:

[0077] Theoretical control efficacy of the mixture E0 = Weed control efficacy of herbicide A at dosage P + Weed control efficacy of herbicide B at dosage Q - Weed control efficacy of herbicide A at dosage P × Weed control efficacy of herbicide B at dosage Q ÷ 100

[0078] Evaluation criteria for the combined effects of mixed drugs:

[0079] E-E0 > 10% indicates a synergistic effect, E-E0 < -10% indicates an antagonistic effect, and E-E0 between ±10% indicates an additive effect.

[0080] Experimental results:

[0081] Table 1. Combined effects of icafolin and pyrazosulfan on wild oats.

[0082]

[0083] Table 2 shows the combined effects of icafolin and pyrazosulfan on foxtail grass.

[0084]

[0085]

[0086] Table 3 shows the combined effects of icafolin and pyrazosulfan on cleavers.

[0087]

[0088] Table 4. Combined effects of icafolin and pyrimethanil on Artemisia annua.

[0089]

[0090]

[0091] Table 5 shows the combined effects of icafolin and pyrazosulfan on shepherd's purse.

[0092]

[0093] Table 6 shows the combined effects of icafolin and pyrazosulfan on Cyperus rotundus.

[0094]

[0095]

[0096] The experimental results are shown in Tables 1-6. The combined use of icafolin and imidacloprid for weed control showed additive or synergistic effects in the laboratory. When the dosage of icafolin + mesosulfuron was 12+2, 12+4, 12+8, 12+10, 12+12, 24+2, 48+2, and 96+2, the combined use of icafolin and mesosulfuron showed synergistic effects against common weeds such as wild oats, foxtail grass, cleavers, shepherd's purse, shepherd's purse, and nutgrass.

[0097] Table 7 shows the combined effects of icafolin and flufenacet on barnyardgrass.

[0098]

[0099] Table 8 shows the combined effects of icafolin and flufenacet on foxtail grass.

[0100]

[0101] Table 9 shows the combined effects of icafolin and flufenacet on velvetleaf.

[0102]

[0103]

[0104] Table 10 shows the combined effects of icafolin and flufenacet on shepherd's purse.

[0105]

[0106] Table 11 Combined effects of icafolin and flusulfanil on Cyperus rotundus.

[0107]

[0108]

[0109] The experimental results are shown in Table 7-11. When the dosage of icafolin + flumetsulam was 12+16, 12+32, 12+64, 12+128, 24+16, 48+16, 96+16, and 192+16, the combined effect of icafolin and flumetsulam in the laboratory was synergistic for common weeds such as barnyard grass, foxtail grass, velvetleaf, shepherd's purse, and nutgrass.

[0110] Example 2: Field efficacy trial 1

[0111] Experimental site: Winter wheat field in Hantao Village, Jiaoqiao Town, Zouping City, Binzhou City, Shandong Province. The soil fertility of the experimental site is moderate to high, and the terrain is flat.

[0112] Experimental crop: Wheat (Jinan 17).

[0113] Experimental plot arrangement: The experiment consisted of 7 treatments, each replicated 4 times. The experimental plots were randomly assigned to blocks, with each plot measuring 20m². 2 .

[0114] Application time and method: The experiment was conducted on December 6, 2022, when the weeds were at the 4-6 leaf stage. The weather was cloudy and the temperature ranged from 6 to 17°C. A backpack electric sprayer was used to spray the herbicide evenly.

[0115] Survey content and methods: Four random sampling points were taken in each community, and the survey area was 0.25m at each point. 2 The experiment investigated the number of surviving weeds in each plot at 15 and 45 days after application, and calculated the weed control efficacy per plant. At 45 days after application, weeds were removed and their fresh weight was measured, and the fresh weight control efficacy was calculated. At wheat harvest, samples were taken at 5 points diagonally across each plot, with each point covering a 1m² area. 2 Actual yield, converted to yield per hectare, and the yield increase rate are calculated.

[0116] Crop safety observation: Observe the growth of wheat seedlings 15, 30 and 45 days after application. If there is pesticide damage, describe in detail the symptoms (growth inhibition, chlorosis, malformation) and the time of occurrence. Observe the changes in pesticide damage and the time of complete recovery at each survey.

[0117] The calculation formula is as follows:

[0118]

[0119]

[0120]

[0121] Experimental Results and Analysis:

[0122] Table 12 Results of field trials for weed control in wheat fields

[0123]

[0124] Safety results: Wheat seedling growth was observed at 15, 30 and 45 days after application. No phytotoxicity was found in wheat seedlings, such as inhibited growth, yellowing, or deformity, in any of the pesticide treatments.

[0125] As shown in Table 12, the total weed control efficacy of 16% icafolin·pyrazosulfuron suspension (3:1), 35% icafolin·pyrazosulfuron suspension (1:1), 26% icafolin·pyrazosulfuron suspension (12:1), and 25% icafolin·pyrazosulfuron suspension (24:1) 15 days after application was 90.65%, 88.50%, 91.78%, and 86.32%, respectively, indicating very good control efficacy. The plant control efficacy of 16% icafolin·pyrazosulfuron suspension (3:1), 35% icafolin·pyrazosulfuron suspension (1:1), 26% icafolin·pyrazosulfuron suspension (12:1), and 25% icafolin·pyrazosulfuron suspension (24:1) for total weeds 15 days after application was 93.68%, 93.95%, 94.69%, and 90.58%, respectively, and the fresh weight control efficacy was 94.65%, 95.09%, 96.06%, and 91.85%, respectively, showing excellent weed control effects compared with single-agent treatments.

[0126] Yield Increase Results: Before wheat harvest, yields were measured in each treatment area. Table 12 shows that the equivalent wheat yields for 16% icafolin·pyrazosulfuron suspension (3:1), 35% icafolin·pyrazosulfuron suspension (1:1), 26% icafolin·pyrazosulfuron suspension (12:1), and 25% icafolin·pyrazosulfuron suspension (24:1) were 8413, 8468, 8581, and 8294 kg / hm², respectively. 2 Compared with the control group, the yields increased by 11.46%, 12.19%, 13.69%, and 9.88%, respectively.

[0127] Example 3: Field efficacy trial 2

[0128] Experimental site: The experimental site was a soybean planting area in Liaoyang County, Liaoning Province. The soil fertility was moderate and irrigation and drainage were convenient.

[0129] Experimental crop: soybean (Tiefeng 29).

[0130] Experimental targets: The main weeds in soybean fields include barnyard grass (Echino chloacrus galli L.), velvetleaf (Abutilon theophrasti Medic.), iron amaranth (Acalypha australis L.), quinoa (Chenopodium album Linn.), amaranth (Abutilon theophrasti), and nutgrass (Cyperus rotundus L.).

[0131] Experimental plot arrangement: A total of 7 treatments were set up in the experiment. The experimental plots were arranged in a randomized block design, with each treatment replicated 4 times. The area of ​​each experimental plot was 26m². 2 .

[0132] Application time and method: The experiment was conducted when the weeds were at the 2-4 leaf stage. The Shandong Weishi brand manual sprayer was used to apply the pesticide once, and efforts were made to ensure that the spraying was even and thorough.

[0133] Survey Content and Methods: Referring to GB / T 17980.125-2004 "Guidelines for Field Efficacy Tests of Pesticides (II) - Control of Weeds in Soybean Fields with Herbicides", the absolute value survey method was used. Four points were randomly selected in each plot, each 0.25m wide. 2 A sampling survey was conducted. Crop safety was assessed 7 days after application; the number of remaining weeds was assessed 20 days after application, and the control efficacy per plant was calculated; the number of remaining weeds was assessed 40 days after application, and the control efficacy per plant was calculated. The fresh weight of the above-ground portion of the weeds was also weighed, and the fresh weight control efficacy was calculated. At harvest, a 15m² sample was selected. 2 Soybean yield was measured after harvesting, and the yield increase rate was calculated by converting the yield per hectare to the yield per hectare.

[0134] The calculation formula is as follows:

[0135]

[0136]

[0137]

[0138] Experimental Results and Analysis:

[0139] Table 13 Results of field trials for weed control in soybean fields

[0140]

[0141]

[0142] Safety results: Field surveys conducted after emergence showed that soybeans in all treatment areas grew normally, with plant height, leaf age, and leaf color similar to the control area, and no phytotoxicity was observed. Visual observation during the experiment revealed no adverse effects on the surrounding environment or non-target organisms. Yield measurements at harvest showed that all treatment areas experienced varying degrees of yield increase compared to the control, with increases ranging from 8.36% to 23.81%.

[0143] Efficacy Results: Table 13 shows that the total control efficacy against weeds at 40 days post-application of 19% Icapolin·flufenoxam EC (3:16), 25% Icapolin·flufenoxam SC (1.5:1), 35% Icapolin·flufenoxam ME (3:32), and 52% Icapolin·flufenoxam granules (12:1) was 97.02%, 95.99%, 94.23%, and 92.29%, respectively, and the total control efficacy by fresh weight was 99.12%, 97.27%, 95.82%, and 93.47%, respectively. Flufenoxam alone generally showed good control efficacy against broadleaf weeds, but lower efficacy against grassy weeds. Combining flufenoxam with Icapolin broadened the weed control spectrum and improved the overall control effect.

[0144] Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A herbicidal composition containing icafolin, characterized in that, The herbicidal composition comprises active ingredient A and active ingredient B. Active ingredient A is icafolin, and active ingredient B is either pyrazosulfuron or flumetsulam. If active ingredient B is pyrazosulfuron, the mass ratio of active ingredient A to active ingredient B is 1:1 to 48:

1. If active ingredient B is flumetsulam, the mass ratio of active ingredient A to active ingredient B is 3:32 to 12:

1.

2. The herbicidal composition according to claim 1, characterized in that, The active ingredient B is pyrazosulfuron, and the mass ratio of active ingredient A to active ingredient B is 1.2:1 to 24:

1.

3. The herbicidal composition according to claim 1, characterized in that, The active ingredient B is flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 3:16 to 6:

1.

4. The herbicidal composition according to claim 1, characterized in that, The active ingredient B is pyrazosulfuron, and the mass ratio of active ingredient A to active ingredient B is 12:2, 12:4, 12:8, 12:10, 12:12, 24:2, 48:2, or 96:2; the active ingredient B is flusulfanilamide, and the mass ratio of active ingredient A to active ingredient B is 12:16, 12:32, 12:64, 12:128, 24:16, 48:16, 96:16, or 192:

16.

5. The herbicidal composition according to claim 1, characterized in that, The total weight of the herbicidal composition is 100 wt%, and the total weight of active ingredient A and active ingredient B accounts for 0.01% to 80% of the herbicidal composition.

6. The herbicidal composition according to claim 1, characterized in that, In addition to the active ingredient, the herbicidal composition also contains other auxiliary ingredients, which are selected from one or more of the following: wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

7. The herbicidal composition according to claim 1, characterized in that, The formulations prepared from the herbicidal composition are in the form of solid and / or liquid formulations.

8. The herbicidal composition according to claim 7, characterized in that, The solid formulation is a water-dispersible granule or a wettable powder, and the liquid formulation is a suspension, emulsifiable concentrate, or microemulsion.

9. The herbicidal composition according to any one of claims 1-8 for the control of unwanted plants.

10. The application according to claim 9, characterized in that, The unwanted plants are broadleaf weeds, grass weeds and / or sedge weeds.

11. The application according to claim 9, characterized in that, The unwanted plant growing locations are wheat fields or soybean fields.

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