Weeding composition containing halauxifen-methyl and application thereof

Abstract

The invention belongs to the technical field of pesticide weeding, and discloses a halauxifen-methyl-containing weeding composition and application thereof, the active ingredients in the weeding composition comprise halauxifen-methyl, clodinafop-propargyl and carfentrazone-ethyl, and the mass ratio of halauxifen-methyl to clodinafop-propargyl to carfentrazone-ethyl is 1: (0.01-50): (0.01-50). According to the weeding composition disclosed by the invention, compounds with different action mechanisms are reasonably compounded, so that the weeding spectrum is expanded, the weeding efficiency is improved, the resistance risk is reduced, the dosage of a single component is reduced, the safety of crops is obviously improved, and the weeding composition is safe to the environment.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide weeding and discloses a herbicidal composition containing haloxiclopyralid and application thereof. Background Art

[0002] Halauxifen-methyl is a new hormone-based herbicide developed by Dow AgroSciences (now Corteva). It is the first product in a new chemical class of aryl picolinate. Its chemical name is 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid methyl ester, and its molecular formula is C 14 H 11 Cl2FN2O3, CAS number 943831-98-9. Haloxyfop-methyl mimics the effects of high-dose natural plant growth hormones, interfering with the auxin-regulating genes of sensitive plants, stimulating excessive cell division and blocking conductive tissues, ultimately leading to plant death. Its targets include TIR1 and AFB5 receptors. The high affinity for AFB5 significantly reduces the dosage, and due to the complexity of its targets (up to 6), the risk of resistance is low. It is mainly used in cereal fields such as wheat, barley, and rye to control broad-leaved weeds and resistant weeds such as Artemisia selengensis, Glechoma longituba, and Shepherd's Purse. It has limited effect on grass weeds.

[0003] Clodinafop-propargyl is an aromatic oxyphenoxypropionic acid herbicide with the chemical name: (R)-2-[4-(5-chloro-3-fluoro-2-pyridyloxy)phenoxy]propionate, CAS number 105512-06-9, which was developed by Syngenta of Switzerland. Clodinafop-propargyl inhibits acetyl-CoA carboxylase (ACCase) in plants, blocks fatty acid synthesis, destroys the cell membrane system, and ultimately causes the death of weeds. It has strong systemic conductivity and can be absorbed by the stems and leaves of weeds and conducted to the meristem. It is effective against grass weeds in cereal fields such as wheat and barley, such as wild oats, foxtail grass, oats, ryegrass, common bluegrass, hard grass, foxtail grass, barnyard grass, etc., but has limited control effect on broad-leaved weeds. The above weeds that have developed resistance are generally ineffective, and it is ineffective against knotweed and brome.

[0004] Carfentrazone-ethyl is a contact-type selective herbicide of the triazolinone class developed by FMC Corporation of the United States. Its chemical name is (RS)-2-chloro-3-[2-chloro-5-(4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,3,-triazol-1-yl)-3-fluorophenyl]propionic acid ethyl ester, and its molecular formula is C 15 H1 4Cl2F3N3O3, CAS number 128639-02-1. Mesotrione inhibits protoporphyrinogen oxidase (PPO) in chlorophyll biosynthesis, leading to the accumulation of toxic intermediates, damaging cell membranes and causing rapid leaf dryness and death. It is primarily effective against broadleaf weeds and sedges, such as cleavers, speedwell, velvetleaf, and Amaranthus retroflexus.

[0005] Wheat is a major global food source, but field weeds (such as crabgrass, barnyard grass, and Amaranthus retroflexus) compete with crops for nutrients, light, and space, resulting in a 10%-35% yield reduction. Traditional single-agent or two-component combination herbicides are difficult to meet the needs of comprehensive management due to their narrow herbicidal spectrum, unstable control effects, or resistance issues. Since fluclopyralid (ALS inhibitor) is highly effective against broadleaf weeds, it has limited control effects on grass weeds; clodinafop-butyl (ACC inhibitor) specializes in grass weeds and is ineffective against broadleaf weeds, and has low control effects on resistant weeds; foramsulfuron (photosynthesis inhibitor) has a high control effect on grass weeds, but is easily affected by environmental factors and has certain phytotoxicity to the target crop wheat. Therefore, a reasonable combination of the three can expand the herbicidal spectrum, enhance the control effect, and effectively reduce the occurrence of phytotoxicity.

[0006] There are no reports on the three-way combination in the existing literature. Although the two-way combination (such as fluazifop-butyl + clodinafop-butyl), (fluazifop-butyl + mesotrione), and (clodinafop-butyl + mesotrione) expands the weed control spectrum, the synergistic effect is limited. Some weeds have developed resistance to them after long-term use, and they cannot solve the bottleneck of controlling drug-resistant weeds and the occurrence of drug damage to target crops. Summary of the Invention

[0007] Based on the above situation, the object of the present invention is to provide a ternary herbicidal composition containing halophyllin-butyl, clodinafop-propargyl and mesotrione.

[0008] Another object of the present invention is to provide the use of the above ternary herbicidal composition for preventing weeds in wheat fields. The herbicidal composition has a significant synergistic effect, expands the weed control spectrum, has a high control effect on resistant weeds, and does not cause any phytotoxicity to crops.

[0009] In order to achieve the above objectives, the present invention provides the following technical solution: a herbicidal composition containing haloxyfop-butyl, wherein the active ingredients in the herbicidal composition include haloxyfop-butyl, clodinafop-propargyl, and mesotrione, and the mass ratio of haloxyfop-butyl to clodinafop-propargyl to mesotrione is 1:(0.01~50):(0.01~50), or any value within the above numerical range.

[0010] Furthermore, the mass ratio of haloxifen-butyl to clodinafop-propargyl to foramsulfuron is 1:(0.625-20):(0.625-10), or any value within the above numerical range.

[0011] Furthermore, the mass ratio of haloxifen-butyl to clodinafop-propargyl to foramsulfuron is 1:(1.25-20):(1.25-10), or any value within the above numerical range.

[0012] Further, the mass ratio of the fluclopyralid to clodinafop-butyl and forsaking sole is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (2:20:5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+5 (1:5:1.25), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+5(1:1.25:0.65), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+5(1:2.5:0.625), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5);

[0013] Further, the mass ratio of the fluclopyralid to clodinafop-butyl and forsaking sole is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (1:10:2.5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+5 (1:5:1.25), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+5(1:1.25:0.625), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5);

[0014] Further, the mass ratio of the fluclopyralid to clodinafop-butyl and forsaking sole is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (1:10:2.5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+ 5(1:5:1.25), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+5(1:5:0.625), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5);

[0015] Further, the mass ratio of the fluclopyralid to clodinafop-butyl and forsaking sole is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (1:10:2.5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5: 5), 4+20+5(1:5:1.25), 4+20+10(1:2.5:1.25), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5);

[0016] Further, the mass ratio of the fluclopyralid to clodinafop-butyl and forsaking sole is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (2:20:5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:0.625), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:0.625). :5), 4+20+5(1:5:1.25), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5);

[0017] Furthermore, based on 100% of the total weight of the herbicidal composition, the active ingredient accounts for 2% to 80% of the total weight of the herbicidal composition.

[0018] Furthermore, the herbicidal composition includes, in addition to the active ingredient, agriculturally acceptable auxiliary ingredients, wherein the auxiliary ingredients are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoaming agents, solvents, preservatives, stabilizers, synergists or carriers.

[0019] Furthermore, the herbicidal composition can be prepared into an agriculturally acceptable formulation, which is a solid formulation or a liquid formulation.

[0020] Furthermore, the solid preparation is a water-dispersible granule or a wettable powder, and the liquid preparation is a suspension, an emulsifiable concentrate, a microemulsion, an aqueous emulsion, a dispersible oil suspension, or a microcapsule suspension.

[0021] The invention also discloses application of the above-mentioned herbicidal composition in controlling weeds in wheat fields.

[0022] Furthermore, the weeds are annual or perennial weeds, and the weeds are Artemisia selengensis, Alopecurus mume, Achyranthes bidentata, Hard grass, Shepherd's purse, Glehnia littoralis, Veronica persica, Chickweed, Achyranthes bidentata, Polygonum multiflorum, Chenopodium album, Humulus chinensis, Bindweed, Echinops chinensis, and Cyperus difformis.

[0023] Furthermore, the herbicidal composition is applied to the unwanted plants or their growth sites.

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

[0025] 1) The herbicidal composition of the present invention has obvious synergistic effects, and its weed control spectrum covers grass, broad-leaved and sedge weeds, significantly expanding the weed control spectrum.

[0026] 2) The herbicidal composition of this invention utilizes multiple mechanisms of synergy among its different active ingredients, making it difficult for weeds to develop resistance through a single mutation, thereby extending the lifespan of the agent. This composition can overcome resistance in weed populations already resistant to a single agent (such as clodinafop-propargyl or foramsulfuron), providing significant control effectiveness against resistant weeds.

[0027] 3) The herbicidal composition of the present invention reduces the amount of medicine used, lowers the cost, and reduces environmental residues. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is illustrated by the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention and can be used to describe the present invention. They should not be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0029] Preparation Example Preparation method:

[0030] 1. Water-dispersible granules: According to the formula ratio, the active ingredient is added to the carrier, and surfactants and other functional additives are added thereto, mixed, and after air flow grinding, 10-25% water is added, and then the mixture is kneaded, granulated, dried, and sieved to obtain the water-dispersible granule product; or the pulverized powder is sprayed with water in a boiling granulator, granulated, dried, and then sieved to obtain the product.

[0031] 2. Wettable powder: According to the formula ratio, the active ingredients, dispersants, wetting agents and fillers are mixed, uniformly stirred in a stirring tank, and pulverized and mixed uniformly multiple times in a jet mill to prepare the wettable powder of the composition of the present invention.

[0032] 3. Suspension concentrate: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reactor in sequence, water is added and mixed evenly, and the suspension concentrate product is obtained by high-speed shearing, wet sand grinding, and finally homogenization filtration.

[0033] 4. Emulsifiable concentrate: According to the formula ratio, the active ingredient, solvent, and cosolvent are added to a mixing kettle and stirred to dissolve them. Then, an emulsifier is added and the balance is supplemented with the remaining solvent. The mixture is stirred evenly in a stirred kettle and filtered to obtain the desired emulsifiable concentrate of the present invention.

[0034] 5. Microemulsion: According to the formula ratio, mix the active ingredients, solvents, emulsifiers, etc. to obtain the oil phase, mix the antifreeze and water to obtain the water phase, add the oil phase to the water phase while stirring, and continue shearing for 10 minutes. Then add the defoaming agent and stir evenly to obtain small droplets of oil phase particles of 0.01 to 0.1 microns, thus obtaining the microemulsion product.

[0035] 6. Emulsion in water: According to the formula ratio, dissolve the active ingredient in the solvent and add emulsifier to dissolve it into a uniform oil phase. Mix deionized water and antifreeze together to form a uniform water phase. Under high-speed shear, add the oil phase to the water phase. Finally, add thickener, preservative and defoaming agent to form a well-dispersed emulsion in water product.

[0036] 7. Dispersible oil suspension: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reactor in sequence, oil is added and mixed evenly, and the dispersible oil suspension product is obtained by high-speed shearing, wet sand grinding, and finally homogenization filtration.

[0037] Preparation example:

[0038] Preparation Example 1: 34% Haloxylonil-butyl, Clodinafop-propargyl, Mefenacet-butyl water dispersible granules (4:20:10)

[0039] Formula composition: 4% fluazifop-butyl, 20% clodinafop-butyl, 10% mesotrione, 10% sodium lignin sulfonate, 4% naphthalene sulfonate formaldehyde condensate, 3% sodium lauryl sulfate, 5% white carbon black, 20% starch, and kaolin makes up the balance.

[0040] Preparation Example 2: 26% haloxifen-butyl, clodinafop-butyl, foramsulfuron wettable powder (1:20:5)

[0041] Formula composition: 1% fluazifop-butyl, 20% clodinafop-butyl, 5% mesotrione, 3% sodium alkyl polyoxyethylene ether sulfonate, 3% sodium lignin sulfonate, 5% naphthalene sulfonate formaldehyde condensate, 8% kaolin, 10% white carbon black, and bentonite makes up the balance.

[0042] Preparation Example 3: 31% Haloxyfop-butyl·clodinafop-butyl·foram-butyl suspoemulsion (1:20:10)

[0043] Formula composition: 1% fluazifop-butyl, 20% clodinafop-butyl, 10% mesotrione, 3% styrenated phenol polyoxyethylene ether sulfate, 4% arylphenol polyoxyethylene ether phosphate, 2% Guerbet alcohol polyoxyethylene ether, 0.2% xanthan gum, 1% magnesium aluminum silicate, 5% glycerol, 0.1% sodium sorbate, 0.5% silicone oil, and deionized water to make up the balance.

[0044] Preparation Example 4: 14.5% Haloxyfop-butyl, Clodinafop-butyl, Mesotrione emulsifiable concentrate (2:10:2.5)

[0045] Formula composition: 2% halophyllin-butyl, 10% clodinafop-butyl, 2.5% mesotrione, 15% N-methyl pyrrolidone, 10% sorbitan polyoxyethylene ether, 2% calcium dodecylbenzenesulfonate, 10% DMF, and methyl oleate makes up the balance.

[0046] Preparation Example 5: 12% Haloxylonil-butyl·clodinafop-propargyl·metazoline-butyl microemulsion (2:5:5)

[0047] Formula composition: 2% halophyllin-butyl, 5% clodinafop-propargyl, 5% foramsulfuron, 20% cyclohexanone, 12% phenylethylphenol polyoxyethylene polyoxypropylene ether, 3% triphenylphenol polyoxyethylene ether, 1% sodium alkyl polyoxyethylene ether sulfonate, 0.1% silicone defoamer, and deionized water to make up the balance;

[0048] Preparation Example 6: 13.5% Haloxyfop-butyl, Clodinafop-butyl, Mesotrione Emulsion in Water (1:10:2.5)

[0049] Formula composition: 1% fluazifop-butyl, 10% clodinafop-butyl, 2.5% mesotrione, 10% ethylene glycol oxyethylene polyoxypropylene ether, 1% fatty alcohol polyoxyethylene ether sulfate, 18% cyclohexanone, 0.25% xanthan gum, 5% glycerol, 0.15% sodium benzoate, 0.5% silicone oil, and deionized water to make up the balance.

[0050] Preparation Example 7: 32% Haloxylonil-butyl, Clodinafop-propargyl, Mefenacet-butyl dispersible oil suspension (2:20:10)

[0051] Formula composition: 2% fluclopyralid, 20% clodinafop-butyl, 10% mesotrione, 3% succinate sulfonate, 15% castor oil polyoxyethylene ether, 3% isomeric tridecyl alcohol polyoxyethylene ether, 2% succinate sulfonate, 1% silicon dioxide, 1% organic bentonite, and soybean oil makes up the balance.

[0052] Example 1: Indoor biological activity test

[0053] The test was carried out in accordance with NY / T 1155.7-2006 “Guidelines for Indoor Bioassay Tests of Pesticides—Herbicides Part 7: Determination of Combined Action of Mixtures” and NY / T 1155.4-2006 “Guidelines for Indoor Bioassay Tests of Pesticides—Herbicides Part 4: Determination of Herbicide Activity—Stem-Leaf Spray Method”.

[0054] The weeds used for testing were wild oats, sedge, field bindweed, shepherd's purse, and sedge. A number of mature and plump seeds from the previous year were collected and set aside.

[0055] Culture Conditions: The experiment was conducted in an artificial intelligence climate chamber. Plastic pots with a diameter of 25 cm were selected and an appropriate amount of moist sterilized loam was added to a soil surface diameter of 20 cm. The temperature was 20-25°C, the relative humidity was 60%-80%, the light-dark cycle was 14-10 hours, and the illumination was 2000 lx. The culture medium was sieved, air-dried loam with an organic matter content of 1.6% and a pH of 6.7. The soil was thoroughly moistened using bottom-water irrigation. Pretreated test weed seeds were evenly sown on the soil surface and covered with 1 cm of soil. After sowing, the seeds were transplanted to the greenhouse for conventional cultivation, and water was replenished using bottom-water irrigation to maintain soil moisture.

[0056] Test agents: Haloxyfop-butyl, Clodinafop-butyl, and Mesulfuron-butyl technical.

[0057] Preparation of the drug: Dissolve the original drug in a suitable solvent, and then dilute it with 0.1% Tween 80 aqueous solution.

[0058] Chemical treatment: Thin out weeds after emergence to ensure uniform weed density. Select specimens of appropriate leaf age for spray treatment. Adjust the spray volume before testing, and spray from low to high doses according to the experimental design. Each treatment was replicated four times, with a blank control treated with a 0.1% Tween 80 aqueous solution containing the corresponding organic solvent. After treatment, allow the chemical solution on the specimen surface to air-dry before transferring to the greenhouse for conventional incubation.

[0059] Investigation: After treatment, the growth status of the test weeds was observed and recorded regularly. 21 days after treatment, the aboveground weeds were harvested and their fresh weight was measured.

[0060] Calculation formula:

[0061]

[0062] Theoretical fresh weight control effect E0 (%) = 100-[(100-fresh weight control effect of herbicide A) × (100-fresh weight control effect of herbicide B) × (100-fresh weight control effect of herbicide C)] / 100 2

[0063] Evaluation criteria: If E-E0 < -10%, it indicates antagonism; if E-E0 is between ±10%, it indicates additive effect; if E-E0 > 10%, it indicates synergism.

[0064] Indoor test data:

[0065] Table 1 Indoor joint effects of haloxifen-butyl+clodinafop-butyl+meclofonate-butyl on wild oats

[0066]

[0067]

[0068] The results in Table 1 show that halauxifen-butyl + clodinafop-butyl + foramsulfuron have good indoor activity against wild oats. Among them, the mass ratio of halauxifen-butyl + clodinafop-butyl + foramsulfuron is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (1:10:2.5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+ 5(1:5:1.25), 4+20+10(1:2.5:1.25), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), and 8+40+20(1:5:2.5) showed a synergistic effect on wild oats.

[0069] Table 2 Indoor combined effects of haloxifen-butyl+clodinafop-butyl+meclofonate-butyl on sedge grass

[0070]

[0071]

[0072] The results in Table 2 show that halophyllin+clodinafop-butyl+mefenacet-butyl have good indoor activity against sedge grass. Among them, the mass ratio of fluazifop-butyl+clodinafop-butyl+meclostrobin is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (2:20:5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+5 (1:5:1.25), 4+20+10 (1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+5(1:1.25:0.65), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+5(1:2.5:0.625), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5).

[0073] Table 3 Indoor joint effect of halauxilin-butyl+clodinafop-butyl+meclofos-butyl compound on field bindweed

[0074]

[0075]

[0076] The results in Table 3 show that haloxifen-butyl+clodinafop-butyl+mefenacet-butyl have good indoor activity against bindweed. Among them, the mass ratio of fluazifop-butyl+clodinafop-butyl+meclostrobin is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (1:10:2.5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+5 (1:2 5), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+5(1:1.25:0.625), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5) showed a synergistic effect on bindweed.

[0077] Table 4 Indoor joint effect of halosulfuron + clodinafop-butyl + foramsulfuron compound on shepherd's purse

[0078]

[0079] The results in Table 4 show that haloxicam-butyl+clodinafop-butyl+meclostrobin have good indoor activity against shepherd's purse. Among them, the mass ratio of fluazifop-butyl+clodinafop-butyl+meclostrobin is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (1:10:2.5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:1.25), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+5 (1:5:1 .25), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+5(1:5:0.625), 8+40+10(1:5:1.25), 8+40+20(1:5:2.5) showed a synergistic effect on shepherd's purse.

[0080] Table 5 Indoor joint effect of haloxifen-butyl+clodinafop-butyl+meclofonate-butyl compound on Cyperus diversiformis

[0081]

[0082]

[0083] The results in Table 5 show that halauxifen-butyl + clodinafop-butyl + foramsulfuron have good indoor activity against Cyperus diversiformis. Among them, the mass ratio of halauxifen-butyl + clodinafop-butyl + foramsulfuron is 2+10+5 (1:5:2.5), 2+10+10 (1:5:5), 2+10+20 (1:5:10), 2+20+5 (2:20:5), 2+20+10 (1:10:5), 2+20+20 (1:10:10), 2+40+5 (1:20:2.5), 2+40+10 (1:20:5), 2+40+20 (1:20:10), 4+10+5 (1:2.5:0.625), 4+10+10 (1:2.5:2.5), 4+10+20 (1:2.5:5), 4+20+ 5(1:5:1.25), 4+20+10(1:5:2.5), 4+20+20(1:2.5:2.5), 4+40+5(1:10:1.25), 4+40+10(1:10:2.5), 4+40+20(1:10:5), 8+10+10(1:1.25:1.25), 8+10+20(1:1.25:2.5), 8+20+10(1:2.5:1.25), 8+20+20(1:2.5:2.5), 8+40+10(1:5:1.25), and 8+40+20(1:5:2.5) showed a synergistic effect on Cyperus diversiformis.

[0084] Example 2: Field efficacy test

[0085] Test location: The test was conducted in the wheat fields of Laoshan Village, Zhengji Town, Tianchang City, Anhui Province. The soil fertility of the test site was above average. Japanese alopecuroides and Artemisia selengensis had already become resistant weed populations in the area, and the control effect was unsatisfactory.

[0086] Experimental crop: wheat.

[0087] Targets for control: Japanese alopecuroides, Artemisia selengensis, Artemisia selengensis, Shepherd's purse, and Cyperus diversifolia.

[0088] Experimental design: The experiment set up 14 treatments, including 13 chemical treatments and 1 water control. Each plot was repeated 4 times. Each experimental plot was arranged in random blocks, and the area of each plot was 30m 2 .

[0089] Application method: The test was conducted on December 9, 2024, when the wheat was at the 4-5 leaf stage. A Gongnong-16 backpack sprayer was used to evenly spray the weeds. No other herbicides were used in the field during the entire trial.

[0090] Experimental survey: 4 random sampling points were selected in each plot, and 0.25m was surveyed at each point. 2, record the number of each target weed in the sample plot, investigate the number of weeds in each treatment area 15 days and 40 days after application, and pull out all the weeds in each sample point with their roots, wash them, dry them, cut off the roots and weigh them.

[0091] Safety survey: Investigate the wheat growth in each plot from time to time. According to the pesticide damage grading method, visually judge whether the pesticide has caused damage and the degree of damage. Conduct survey and statistics according to Table 6.

[0092] Table 6 Crop damage classification

[0093] Symptoms of drug injury Level / Grade No pesticide damage 1 Slight pesticide damage, does not affect the normal growth of crops 2 Moderate pesticide damage, recoverable, no impact on yield 3 The damage caused by the pesticide is serious and difficult to recover, resulting in reduced production 4 The damage caused by the pesticide is serious and cannot be recovered, resulting in a significant reduction in yield or even no yield 5

[0094] Calculation method of drug efficacy:

[0095]

[0096] Test results:

[0097] Table 7 Control effect of each treatment on weeds 15 days after application

[0098]

[0099] Table 8 Control effect of each treatment on weeds 40 days after application

[0100]

[0101]

[0102] As shown in the test results in Tables 7-8 above, Japanese alopecuroides and Artemisia selengensis in the test site have developed resistance to pesticides. Foramclorid is mainly used to control broadleaf weeds, but has a poor control effect on the resistant weed Artemisia selengensis; clodinafop-propargyl is mainly used to control broadleaf weeds, but has a poor control effect on the resistant weed Japanese alopecuroides. The preparation examples of the present invention have significantly improved control efficacy against resistant weeds compared to the other treatment groups, and can comprehensively control grass weeds, broadleaf weeds, and sedge weeds in wheat fields, expanding the weed control spectrum and improving control efficacy.

[0103] Table 9: Injury of wheat by each treatment

[0104]

[0105] Field observations found that at the dosage of the active ingredient in this experiment, wheat plants in the treatment areas of 30% fluazifop-butyl·metazoline water dispersible granules (5:25), 25% clodinafop-butyl·metazoline suspension concentrate (20:5), 10% clodinafop-butyl·metazoline·acetochlor suspension concentrate (2:2:6), 24% clodinafop-butyl·metazoline·metsulfuron-methyl emulsifiable concentrate (16:4:4), 30% clodinafop-butyl·metazoline·bensulfuron-methyl wettable powder (10:10:10), and 40% metazoline water dispersible granules suffered from phytosan damage, with a small amount of dead spots on the leaves and brown water-soaked spots on the leaf sheaths. However, the phytosan damage recovered in the middle and late stages of wheat growth and did not affect the normal growth of the crop. The phytosan damage level was 2 to 3. The group treated with 25% clodinafop-butyl·mecloprid·dimethoate suspoemulsion (4:1:20) suffered more serious phytotoxicity. A small number of wheat plants in the treatment area showed bent stems and petioles, twisted awns, and deformed ears, which would result in reduced yield. The phytotoxicity was graded as level 4. No obvious visible phytotoxicity symptoms were found in other treatments, and the plants grew and developed normally.

[0106] Although the present invention has been described in detail above using general descriptions and specific implementation plans, it is obvious to those skilled in the art that some modifications or improvements can be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A herbicidal composition containing haloxiclopyralid, characterized in that The active ingredients in the herbicidal composition include halauxifen-butyl, clodinafop-propargyl and mesotrione, and the mass ratio of halauxifen-butyl to clodinafop-propargyl and mesotrione is 1:(0.01-50):(0.01-50).

2. The herbicidal composition according to claim 1, characterized in that The mass ratio of haloxiclopyralid to clodinafop-propargyl to foramsulfuron is 1:(0.625-20):(0.625-10).

3. The herbicidal composition according to claim 2, characterized in that The mass ratio of haloxiclopyralid to clodinafop-propargyl to foramsulfuron is 1:(1.25-20):(1.25-10).

4. The herbicidal composition according to claim 1, characterized in that The total weight of the herbicidal composition is 100%, and the active ingredient accounts for 2% to 80% of the total weight of the herbicidal composition.

5. The herbicidal composition according to claim 1, characterized in that In addition to the active ingredients, the herbicidal composition also includes agriculturally acceptable auxiliary ingredients, which are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoaming agents, solvents, preservatives, stabilizers, synergists or carriers.

6. The herbicidal composition according to claim 1, characterized in that The herbicidal composition can be prepared into an agriculturally acceptable formulation, which is a solid formulation or a liquid formulation.

7. The herbicidal composition according to claim 1, characterized in that The solid preparations are water-dispersible granules and wettable powders, and the liquid preparations are suspensions, emulsifiable concentrates, microemulsions, aqueous emulsions, dispersible oil suspensions, and microcapsule suspensions.

8. Use of the herbicidal composition according to any one of claims 1 to 7 for controlling weeds in wheat fields.

9. The use according to claim 8, characterized in that The weeds are annual or perennial weeds, and the weeds are Artemisia selengensis, Alopecurus mume, Achyranthes bidentata, Hard grass, Shepherd's purse, Glechoma longituba, Veronica officinalis, Chickweed, Achyranthes bidentata, Achyranthes bidentata, Chenopodium album, Humulus chinensis, Field bindweed, Echinops chinensis, and Cyperus difformis.

10. The use according to claim 8, characterized in that The herbicidal composition is applied to the unwanted plants or the locus where they grow.

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