A herbicidal composition containing iptriazopyrid and its use

Abstract

This invention patent belongs to the field of pesticide herbicide technology, and discloses a herbicidal composition containing iptriazopyrid and its application. The herbicidal composition comprises active ingredient A and active ingredient B, wherein active ingredient A is iptriazopyrid and active ingredient B is pyrimidine oxime-methyl, and the mass ratio of active ingredient A to active ingredient B is 60:1 to 1:10. The herbicidal composition provided by this invention has a reasonable composition, unique efficacy, and significant effect. It is highly effective against weeds in paddy fields, has a broad spectrum of weed control, effectively reduces the development of weed resistance, reduces pesticide costs and the number of applications, and increases yield and income.

Description

[0001] This invention application is a divisional application of application number 2023101996396, filed on March 4, 2023, entitled "A herbicidal composition containing iptriazopyrid and its application". Technical Field

[0002] This invention belongs to the field of pesticides, specifically relating to a herbicidal composition containing iptriazopyrid and its application. Background Technology

[0003] Iptriazopyrid is an amide herbicide developed by Nissan Chemical Company. Its IUPAC name is 3-[[(1-methylethyl)sulfonyl]methyl]-N-(5-methyl-1,3,4-oxadiazol-2-yl)-5-(trifluoromethyl)-1,2,4-triazolo[4,3-a]pyridine-8-carboxamide, CAS Registry Number: 1994348-72-9, and its chemical structure is as follows:

[0004]

[0005] Acetolactate synthase (ALS) inhibitors possess the advantages of high biological activity and a broad weed-killing spectrum. Because their target ALS enzyme does not involve humans or animals, these herbicides have high safety for humans and animals. In production practice, the widespread use of ALS-based herbicides has greatly increased agricultural yields, reduced the cost of manual weeding, and significantly increased farmers' economic income. Ethoxysulfuron (CAS Registry No.: 126801-58-9) and pyrimifluazuron (CAS Registry No.: 168088-61-7) are both ALS inhibitor herbicides. They inhibit the activity of ALS in weeds, leading to the inhibition of side-chain amino acid synthesis, and are characterized by long-lasting effects and good safety.

[0006] However, over-reliance on a single herbicide (or herbicides with the same site of action) can lead to the emergence of weed populations resistant to that herbicide or similar herbicides. ALS inhibitors, in particular, have long faced numerous problems due to their single target and ease of inducing weed resistance. Different types of ALS herbicides exhibit crop specificity, meaning that some crops require the same herbicide for extended periods, leading to the rapid development of ALS-resistant weeds. ALS inhibitors have reported more resistant weeds than any other class of herbicides, and the problem of weed resistance with ALS inhibitors has shown a further worsening trend in recent years. Therefore, how to rationally screen and combine different pesticide varieties to improve weed control in paddy fields, reduce pesticide dosage, lower costs, and delay the development of weed resistance has become a key research focus in paddy field production.

[0007] The applicant mixed iptriazopyrid with any one of ethoxysulfuron or pyrimisulfuron and found that it had a synergistic effect on weed control in paddy fields within a certain mixing ratio range. It has good fast-acting properties, long-lasting effect, and effectively reduces the development of weed resistance, reduces the cost and number of applications, and is safer and more efficient. Summary of the Invention

[0008] The purpose of this invention is to solve the problems of herbicides developing resistance to weeds in paddy fields and poor actual control effects in the prior art, and to provide a herbicidal composition that is highly efficient, low in toxicity, fast-acting, long-lasting, and beneficial to the integrated management of weeds in paddy fields.

[0009] Another object of the present invention is to use the herbicidal composition for the control of weeds in farmland, especially for weeds in waterproof paddy fields.

[0010] The technical solution of the present invention is as follows: a herbicidal composition containing iptriazopyrid, the herbicidal composition comprising active ingredient A and active ingredient B, wherein active ingredient A is iptriazopyrid, and active ingredient B is selected from ethoxysulfuron and pyrimimethoxam.

[0011] Furthermore, the mass ratio of active ingredient A to active ingredient B is 60:1 to 1:10;

[0012] Furthermore, the mass ratio of iptriazopyrid to ethoxysulfuron is 5:1 to 15:1;

[0013] Furthermore, the mass ratio of iptriazopyrid to pyrimidine oxime is 12:1 to 40:1;

[0014] Furthermore, the active ingredient A and active ingredient B constitute 1% to 90% of the mass percentage of the herbicidal composition;

[0015] Furthermore, the active ingredient A and active ingredient B constitute 2% to 70% of the mass percentage of the herbicidal composition;

[0016] Furthermore, the herbicide composition also contains adjuvants commonly used in pesticide formulations to prepare various formulations suitable for agricultural use;

[0017] Furthermore, the additives include one or more of the following: solvents, dispersants, emulsifiers, wetting agents, disintegrants, thickeners, stabilizers, carriers, and antifreeze agents;

[0018] This invention provides a herbicidal composition containing iptriazopyrid, which can be formulated into an pesticide-acceptable formulation according to methods known to those skilled in the art. The herbicidal composition formulation is any one of the following: powder, dispersible tablets, granules, soluble powder, soluble granules, soluble tablets, tablets, emulsion powder, emulsion granules, water-dispersible granules, wettable powder, microcapsule granules, large granules, water-dispersible tablets, microcapsule suspensions, dispersible liquids, emulsifiable concentrates, emulsion granules, emulsion powders, water-emulsions, microemulsions, dispersible oil suspensions, oil-dispersible powders, suspensions, suspension emulsions, soluble concentrates, and ultra-low volume liquids.

[0019] Furthermore, the herbicidal composition is formulated as any one of emulsifiable concentrate, water-dispersible granules, wettable powder, or dispersible oil suspension.

[0020] Furthermore, the additives that can be used in emulsifiable concentrates include: emulsifiers such as fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, castor oil ethylene oxide adduct and its derivatives, polyoxyethylene polyoxypropylene block copolymer, and calcium dodecylbenzene sulfonate; and solvents such as one or more of thallium, methyl oleate, N,N-dimethyldecylamide, dimethyl sulfoxide (DMSO), propylene carbonate, and fatty acid esters.

[0021] Furthermore, the adjuvants that can be used in water-dispersible granules include: dispersants such as polycarboxylate (TERSPERSE 2700, T36, GY-D06, etc.), lignin sulfonate, alkyl naphthalene sulfonate, etc.; wetting agents such as alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, etc.; disintegrants such as ammonium sulfate, sodium sulfate, polyvinylpyrrolidone, starch or its derivatives, bentonite, etc.; binders such as starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethyl cellulose, sucrose, etc.; fillers such as diatomaceous earth, kaolin, silica, calcium phosphate, talc, attapulgite, clay, etc.

[0022] Furthermore, the additives that can be used in wettable powders include: dispersants such as one or more of polycarboxylate salts, lignin sulfonates, polyoxyethylene polyoxypropylene ether block copolymers, alkylnaphthalene formaldehyde condensate sulfonates, alkylphenol polyoxyethylene ether phosphates, fatty alcohol polyoxyethylene ether phosphates, and alkylphenol polyoxyethylene ether sulfonates; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, and alkylnaphthalene sulfonates; and fillers such as one or more of ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, silica, calcium phosphate, talc, attapulgite, and clay.

[0023] Furthermore, the adjuvants that can be used in dispersible oil suspensions include: dispersants such as one or more of polycarboxylates, lignin sulfonates, and alkyl naphthalene sulfonates (dispersant NNO); emulsifiers such as BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125, BY-140), agricultural emulsion 700# (alkylphenol formaldehyde resin polyoxyethylene ether), agricultural emulsion 2201, Span-60# (sorbitan monostearate), Tween-60# (dehydrated sorbitan monostearate polyoxyethylene ether), and agricultural emulsion 1601# (phenylethylphenol polyoxyethylene ether). One or more of the following: oxypropylene ether; wetting agents such as alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, etc.; thickeners such as silica, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; antifreeze agents such as ethylene glycol, propylene glycol, glycerin, urea, inorganic salts such as sodium chloride, etc.; dispersion media such as soybean oil, rapeseed oil, wheat oil, methyl oleate, diesel oil, engine oil, mineral oil, etc.

[0024] Furthermore, the composition is an emulsifiable concentrate, and the components and contents of the emulsifiable concentrate are preferably: active ingredient A 0.1% to 80%, active ingredient B 0.1% to 80%, emulsifier 0.1% to 20%, and solvent 1% to 90%;

[0025] Furthermore, the composition is a water-dispersible granule, and the components and contents of the water-dispersible granule are preferably: active ingredient A 0.1% to 60%, active ingredient B 0.1% to 60%, dispersant 1% to 15%, wetting agent 1% to 10%, disintegrant 1% to 15%, binder 1% to 10%, and filler 1% to 80%.

[0026] Furthermore, the composition is a wettable powder, and the components and contents of the wettable powder are preferably: active ingredient A 0.1% to 60%, active ingredient B 0.1% to 60%, dispersant 1% to 20%, wetting agent 1% to 15%, and filler 1% to 80%.

[0027] Furthermore, the composition is a dispersible oil suspension, and the components and contents of the dispersible oil suspension are preferably as follows: active ingredient A 0.1% to 60%, active ingredient B 0.1% to 60%, dispersant 1% to 15%, emulsifier 0.5% to 20%, wetting agent 1% to 10%, thickener 1% to 10%, antifreeze 0.1% to 10%, and dispersion medium 1% to 80%.

[0028] This invention relates to an application of a herbicidal composition containing iptriazopyrid and its formulation for the control of unwanted plants;

[0029] Furthermore, the unwanted plants grow in rice paddies;

[0030] Furthermore, the unwanted plants are grass weeds, euonymus weeds, and sedge weeds in rice paddies;

[0031] Furthermore, the common weeds in paddy fields mentioned are: barnyard grass, barnyard grass, crabgrass, wild oats, duckweed, three-edged grass, drifting grass, different types of sedge, broken rice sedge, cow's hair, rain-dwelling flower, water sedge, firefly, wild water chestnut, pondweed, water plantain, angelica, dwarf arrowhead, arrowhead, long-petaled arrowhead, wolfberry grass, beggar-ticks, grass dragon, clove knotweed, jointed green, amaranth, water amaranth, (four-leaf) duckweed, small water chestnut, valerian, water hyacinth, and cottongrass;

[0032] Furthermore, the rice paddy weeds mentioned are barnyard grass, Echinochloa crus-galli, Chrysophagus chinensis, Monochoria vaginalis, Cyperus difformis, and Cyperus rotundus.

[0033] The present invention has a reasonable composition, good weed control effect, low application cost, and its activity and weed control effect are not a simple sum of the activities of each component, but have a significant synergistic effect, which can broaden the spectrum of weed control, delay resistance, and have good crop safety. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer and more concise, the invention is described using the following specific embodiments. However, this invention is by no means limited to these embodiments. The embodiments described below are merely preferred embodiments of this invention and can be used to describe the invention, but should not be construed as limiting the scope of the invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0035] Formulation preparation examples

[0036] Example 1: 60% Iptriazopyrid·pyrimidine oxime hydrochloride water-dispersible granules (5:1)

[0037] Formula: 50% Iptriazopyrid, 10% pyrimimethoxyfen, 5% polycarboxylate GY-DO6, 4% sodium dodecyl sulfate, 10% naphthalene sulfonate formaldehyde condensate, 6% sucrose, kaolin to make up the balance;

[0038] Preparation method: According to the formulation ratio in the example, the active ingredients are added to the carrier, and surfactants and other functional additives are added thereto. After mixing, the mixture is pulverized by air jet and then an appropriate amount of water is added. The mixture is then kneaded, granulated, dried and sieved to obtain the water-dispersible granule product.

[0039] Example 2: 26% Iptriazopyrid·ethoxysulfuron water-dispersible granules (12:1)

[0040] Formula: 24% Iptriazopyrid, 2% ethoxysulfuron, 5% methylnaphthalenesulfonate formaldehyde condensate, 3% alkylphenol polyoxyethylene ether, 10% lignin sulfonate, 5% starch, 5% ammonium sulfate, kaolin to make up the balance;

[0041] Preparation method: Same as in preparation example 1.

[0042] Example 3: 35% Iptriazopyrid·pyrimidine oxime suspension (6:1)

[0043] Formula: 30% Iptriazopyrid, 5% pyrimidine oxime ether, 3% fatty alcohol polyoxyethylene ether sulfate, 2% EO / PO block copolymer, 1.5% polycarboxylate, 2% sodium dodecyl sulfate, 0.25% xanthan gum, 5% ethylene glycol, 0.5% magnesium aluminum silicate, 0.5% organosilicon, water to make up the balance;

[0044] Preparation method: According to the formulation ratio in the example, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, mixed with oil until uniform, subjected to high-speed shearing, wet sand milling, and finally homogenized filtration to obtain the suspension product.

[0045] Example 4: 21% Iptriazopyrid·ethoxysulfuron suspension (20:1)

[0046] Formula: 20% Iptriazopyrid, 1% ethoxysulfuron, 1% fatty alcohol polyoxyethylene ether, 3% styrene-phenol polyoxyethylene ether phosphate, 1% polycarboxylate, 2% EO / PO block copolymer, 0.15% xanthan gum, 5% glycerol, 0.5% magnesium aluminum silicate, 0.5% silicone, water to make up the balance;

[0047] Preparation method: Same as in preparation example 3.

[0048] Example 5: 44% Iptriazopyrid·pyrimidine oxime wettable powder (10:1)

[0049] Formula: 40% Iptriazopyrid, 4% pyrimimethoxyfen, 2% sodium lauryl sulfate, 10% sodium dodecylbenzene sulfonate, 8% polycarboxylate, 5% silica, kaolin to make up the balance;

[0050] Preparation method: According to the formulation ratio in the example, the active ingredients are added to the carrier, and surfactants and other functional additives are added thereto. After mixing, the mixture is pulverized by air jet and then mixed again to obtain a wettable powder product.

[0051] Example 6: 64% Iptriazopyrid·ethoxysulfuron wettable powder (15:1)

[0052] Formula: 60% Iptriazopyrid, 4% ethoxysulfuron, 2% sodium dodecyl sulfate, 8% dispersant NNO, 8% lignin sulfonate, 3% silica, kaolin to make up the balance;

[0053] Preparation method: Same as in preparation example 5.

[0054] Example 7: 4% Iptriazopyrid·pyrimidine oxime emulsifiable concentrate (7:1)

[0055] Formula: 3.5% Iptriazopyrid, 0.5% pyrimidin, 20% propylene carbonate, 2% calcium dodecylbenzenesulfonate, 15% fatty alcohol polyoxyethylene ether, and thiol to make up the balance;

[0056] Preparation method: The active ingredients are added to the carrier according to the formulation ratio of the example, and surfactants and other functional additives are added thereto. The mixture is stirred and mixed evenly in a stirring mixing tank to obtain the emulsifiable oil product.

[0057] Example 8: 3.4% Iptriazopyrid·ethoxysulfuron emulsifiable concentrate (16:1)

[0058] Formula: 3.2% Iptriazopyrid, 0.2% ethoxysulfuron, 10% cyclohexanone, 2% calcium dodecylbenzenesulfonate, 10% fatty alcohol polyoxyethylene ether, 10% epoxidized soybean oil, with methyl oleate to make up the balance;

[0059] Preparation method: Same as in preparation example 7.

[0060] Example 9: 17% Iptriazopyrid·pyrimidine oxime dispersible oil suspension (15:2)

[0061] Formula: 15% Iptriazopyrid, 2% pyrimidine oxime ether, 3% calcium dodecylbenzenesulfonate, 2% polycarboxylate, 10% castor oil polyoxyethylene ether, 5% styrene-phenol polyoxyethylene ether methacrylate, 2% organic bentonite, corn oil to make up the balance;

[0062] Preparation method: According to the formulation ratio in the example, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, mixed with oil until uniform, and then subjected to high-speed shearing, wet sand milling and finally homogenized filtration to obtain the dispersible oil suspension product.

[0063] Example 10: 15.5% Iptriazopyrid·ethoxysulfuron dispersible oil suspension (15:0.5)

[0064] Formula: 15% Iptriazopyrid, 0.5% ethoxysulfuron, 3% calcium dodecylbenzenesulfonate, 2% polycarboxylate, 10% castor oil polyoxyethylene ether, 5% styrene-phenol polyoxyethylene ether methacrylate, 1.5% organobentonite, 1.5% fumed silica, soybean oil to make up the balance;

[0065] Preparation method: Same as in preparation example 9.

[0066] Example 11: 15% Iptriazopyrid·pyrimidine oxime hydrochloride emulsion (13:2)

[0067] Formula: 13% Iptriazopyrid, 2% pyrimidine oxime ether, 10% xylene, 10% cyclohexanone, 8% ethylene oxide-propylene oxide copolymer, 1% arylphenol ether phosphate, 5% ethylene glycol, 0.05% silicone defoamer, 0.1% xanthan gum, 0.01% Kathon, water to make up the balance;

[0068] Preparation method: According to the formulation ratio in the example, the active ingredient is dissolved in the solvent and an emulsifier is added to form a homogeneous oil phase. Deionized water and antifreeze are mixed together to form a homogeneous aqueous phase. Under high-speed shearing, the aqueous phase is added to the oil phase to form a well-dispersed water emulsion product.

[0069] Example 12: 21% Iptriazopyrid·ethoxysulfuron water emulsion (20:1)

[0070] Formula: 20% Iptriazopyrid, 1% ethoxysulfuron, 10% xylene, 10% cyclohexanone, 5% epoxidized soybean oil, 10% propylene carbonate, 6% castor oil ethylene oxide, 0.05% silicone defoamer, 0.15% xanthan gum, 0.01% Kathon, water to make up the balance;

[0071] Preparation method: Same as in preparation example 11.

[0072] Indoor Active Examples

[0073] Example 13: Determination of the combined effects of a composition containing iptriazopyrid on common weeds.

[0074] Tests were conducted in accordance with NY / T 1155.4-2006 "Guidelines for Indoor Bioassay of Pesticides: Activity Determination Test - Foliar Spray Method" and NY / T 1155.7-2006 "Guidelines for Indoor Bioassay of Pesticides: Determination of Combined Effects of Mixtures".

[0075] Test targets: barnyard grass, Echinochloa crus-galli, Prunella vulgaris, Monochoria vaginalis, Cyperus difformis, and Cyperus rotundus.

[0076] Test reagents: 95% Iptriazopyrid technical grade, 95% ethoxysulfuron technical grade, and 95% pyrimimethoxam technical grade. All of the above technical grades were provided by the Group's R&D Center.

[0077] Preparation of the drug: Dissolve the drug in a suitable solvent and dilute it with a 0.1% Tween 80 aqueous solution. Prepare three series of mass concentrations using an arithmetic progression method for later use.

[0078] Experimental method: A fixed amount of grass seeds was sown in pots with a diameter of 9 cm and cultivated in a light incubator. When the weeds reached the 1-3 leaf stage, 20 plants were planted per pot and sprayed. After treatment, the plants were continued to be cultivated in a greenhouse. The weed control effect of each treatment was observed regularly, and the fresh weight of the weeds in each treatment was recorded after 14 days.

[0079] Experimental treatment: Each treatment was repeated 4 times, with a water control included.

[0080] Data survey and statistical analysis: The growth status of weeds was observed and recorded after the treatment. After 14 days, the weed control effect was investigated. The fresh weight of weeds was recorded and the fresh weight control efficacy was calculated. The fresh weight inhibition rate of the target by different pesticide ratios was calculated according to the Gowing method.

[0081] Weed fresh weight inhibition rate (E)% = [(fresh weight of weeds in blank area - fresh weight of weeds in control area) / fresh weight of weeds in blank area] × 100

[0082] The theoretical fresh weight inhibition rate (E0)% of the compound herbicide = the fresh weight inhibition rate of weeds at the dosage of compound A at P + the fresh weight inhibition rate of weeds at the dosage of compound B at Q - (the fresh weight inhibition rate of weeds at the dosage of compound A at P × the fresh weight inhibition rate of weeds at the dosage of compound B at Q) / 100;

[0083] Evaluation criteria: If E-E0 < -10%, it indicates an antagonistic effect; if E-E0 is between ±10%, it indicates an additive effect; if E-E0 > 10%, it indicates a synergistic effect.

[0084] The test results are as follows:

[0085] Table 1. Combined effects of Iptriazopyrid with ethoxysulfuron and pyrimisulfuron in the treatment of barnyardgrass and Echinochloa crus-galli.

[0086]

[0087]

[0088] Table 2. Combined effects of Iptriazopyrid with ethoxysulfuron and pyrimisulfuron in the combination of *Heliotropium indicum* and *Monochoria vaginalis*.

[0089]

[0090]

[0091] Table 3. Combined effects of Iptriazopyrid with ethoxysulfuron and pyrimisulfuron in the production of Cyperus difformis and Cyperus rotundus.

[0092]

[0093]

[0094] The experimental results (see Tables 1, 2, and 3) show that Iptriazopyrid, when mixed with ethoxysulfuron and pyrimisulfuron, exhibits good indoor activity against common weeds such as barnyard grass, Echinochloa crus-galli, Dieffenbachia, Chamaedorea elegans, Cyperus difformis, and Cyperus rotundus. The combined effect evaluation type is additive or synergistic.

[0095] Field efficacy trials

[0096] Example 14: Field efficacy test of a herbicidal composition containing Iptriazopyrid.

[0097] Experiment location: Direct-seeded rice paddies in Anhui Province, with sowing on June 5, 2020;

[0098] Experimental Design: In accordance with the "Guidelines for Field Efficacy Trials of Pesticides", the experiment consisted of 8 treatments, with each plot covering an area of ​​30m². 2 Repeat 4 times, with randomized block arrangement, and each block is independently drained and irrigated.

[0099] Common weeds in rice paddies: foxtail grass, barnyard grass, crabgrass, Echinochloa crus-galli, duckweed, Alisma plantago-aquatica, Eclipta prostrata, and Dieffenbachia purpurea;

[0100] Rice variety: Xiangzao 143;

[0101] The experimental design for the test reagents is shown in Table 4 below:

[0102] Table 4 Experimental Design of Test Reagents

[0103]

[0104]

[0105] Application time: July 6, 2020, morning. One application will be made using a backpack sprayer (pressure 0.2 MPa), employing a foliar spraying method for even spraying. The spray volume is 450 L / hm². 2 When applying the herbicide, the weeds should be in the 2-4 leaf stage and the rice in the 4-6 leaf stage. Manual weeding should be carried out once on the same day as the herbicide application.

[0106] Weather conditions: The weather was sunny turning cloudy on the day of the test, with an average temperature of 30°C, a high of 35°C, a low of 22°C, and an average relative humidity of 68%.

[0107] Investigation period: The initial weed population was investigated before application, and the number of residual weeds was investigated 30 days after application, and the control efficacy per plant was calculated. At the same time, it was observed whether any phytotoxic symptoms appeared in the rice after application.

[0108] Survey method: A diagonal 5-point sampling method was used, with each point 0.25m apart. 2 The number of weeds at each point was investigated.

[0109] Data Analysis: The relevant calculation formulas are as follows

[0110] Control efficacy (%) = [(Number of viable weeds in the control area - Number of residual weeds in the treatment area) / Number of viable weeds in the control area] × 100

[0111] Fresh weight control efficacy (%) = [1 - (fresh weight of live weeds in the control area - fresh weight of residual weeds in the treatment area) / fresh weight of live weeds in the control area] × 100

[0112] Data analysis: The efficacy of each treatment area was statistically analyzed using DPS software, and a significant difference analysis was performed. The significance difference was verified at p=0.05 and p=0.01.

[0113] Safety survey of rice: Visual inspection method. While investigating the efficacy of the pesticide, select one point in each plot and investigate 10 plants continuously. Record the plant height, leaf color, growth status and whether the pesticide has caused damage. If the rice is damaged, record the symptoms in detail. Finally, observe whether the rice is normal at the maturity stage.

[0114] Results and Analysis:

[0115] Table 5. Control efficacy of herbicidal compositions containing Iptriazopyrid against weeds in rice paddies.

[0116]

[0117]

[0118] Table 6. Overall control effect of each treatment on weeds in paddy fields

[0119]

[0120] Note: The efficacy in the table above is the overall efficacy. Uppercase letters represent the 1% highly significant level of difference, and lowercase letters represent the 5% significant level of difference.

[0121] As shown in Table 6, the combined experimental agents, including 64% Iptriazopyrid·ethoxysulfuron wettable powder (15:1), 26% Iptriazopyrid·ethoxysulfuron water-dispersible granules (13:1), 15.5% Iptriazopyrid·ethoxysulfuron oil-dispersible suspension (15:0.5), 60% Iptriazopyrid·pyrimisulfuron water-powder granules (5:1), 44% Iptriazopyrid·pyrimisulfuron wettable powder (10:1), and 17% Iptriazopyrid·pyrimisulfuron oil-dispersible suspension (15:2), all showed control efficacy greater than 85% against conventional grass and broadleaf weeds in paddy fields. Their control efficacy was significantly better than that of single-agent treatments such as 10% pyrimisulfuron EC, 15% ethoxysulfuron water-dispersible granules, and 25% Iptriazopyrid oil-dispersible suspension.

[0122] Table 7 Results of safety tests on paddy fields for each treatment.

[0123]

[0124] Safety investigation: During the trial, all mixed pesticides were observed to be safe for rice growth, and no phytotoxicity occurred.

[0125] In summary, the combination of Iptriazopyrid with ethoxysulfuron and pyrimimethoxam for the control of weeds in paddy fields is not a simple additive of the activities of each component. Compared with existing single formulations, it has significant control efficacy against a variety of weeds, a significant synergistic effect, can delay resistance development, has low pesticide residues, good safety, and meets the safety requirements of pesticide formulations.

[0126] 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 iptriazopyrid, characterized in that, The herbicidal composition comprises active ingredient A and active ingredient B, wherein active ingredient A is iptriazopyrid and active ingredient B is pyrimidine oxime ether, and the mass ratio of iptriazopyrid to pyrimidine oxime ether is 12:1 to 40:

1.

2. The herbicidal composition according to claim 1, characterized in that, The active ingredients A and B account for 1% to 90% of the mass percentage of the herbicidal composition.

3. The herbicidal composition according to claim 1, characterized in that, The active ingredients A and B account for 2% to 70% of the mass percentage of the herbicidal composition.

4. The herbicidal composition according to claim 1, characterized in that, The herbicide composition also contains adjuvants commonly used in pesticide formulations to prepare various formulations suitable for agricultural use.

5. The herbicidal composition according to claim 4, characterized in that, The additives include one or more of the following: solvents, dispersants, emulsifiers, wetting agents, disintegrants, thickeners, stabilizers, carriers, and antifreeze agents.

6. The herbicidal composition according to claim 5, characterized in that, The herbicidal composition is formulated as any one of emulsifiable concentrate, water-dispersible granules, wettable powder, or dispersible oil suspension.

7. The use of the herbicidal composition according to any one of claims 1-6 for controlling unwanted plants, characterized in that, The unwanted plants mentioned are barnyard grass, Echinochloa crus-galli, Chrysophagus chinensis, duckweed, Cyperus difformis, and Cyperus rotundus.

8. The application according to claim 7, characterized in that, The unwanted plants were growing in rice paddies.

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