A herbicidal composition containing iptriazopyrid and its application

Abstract

The patent of the present invention belongs to the technical field of pesticide herbicides, and discloses a herbicidal composition containing iptriazopyrid and its application, wherein the herbicidal composition comprises active ingredient A and active ingredient B, wherein active ingredient A is iptriazopyrid, active ingredient B is selected from any one of ethoxysulfuron and pyrimidine oxime, and the mass ratio of active ingredient A to active ingredient B is 60:1 to 1:10. The herbicidal composition provided by the present invention has reasonable components, unique efficacy, significant effect, high efficiency against rice field weeds, wide weed control spectrum, and effectively reduces the generation of weed resistance, reduces the cost and frequency of drug use, and increases production and income.

Description

Technical Field

[0001] The invention belongs to the field of pesticides, and specifically relates to a weeding composition containing iptriazopyrid and application thereof. Background Art

[0002] Iptriazopyrid is an amide herbicide developed by Nissan Chemical. 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 registration number: 1994348-72-9, chemical structure:

[0003]

[0004] Acetolactate synthase (ALS) inhibitors have the advantages of high biological activity and a wide spectrum of weed control. Since the target ALS enzyme does not involve humans and animals, this herbicide is highly safe for humans and animals. The use and promotion of ALS herbicides in production practice has greatly increased the output of agricultural production, reduced the cost of manual weeding, and significantly increased farmers' economic income. Ethoxysulfuron (CAS registration number: 126801-58-9) and pyrimethamine (CAS registration number: 168088-61-7) are both acetolactate synthase (ALS) inhibitor herbicides. They inhibit the activity of acetolactate synthase (ALS) of weeds, resulting in the obstruction of side chain amino acid synthesis. They have the characteristics of long lasting effect and good safety.

[0005] However, over-reliance on a single herbicide (or herbicides with the same action site) may lead to the emergence of weed populations resistant to this or this type of herbicide. In particular, ALS inhibitor herbicides have always faced many problems due to their single target and easy induction of weed resistance. There is a certain specificity between the crops to which different types of ALS herbicides are applied, so that weeds in certain crops can only use the same herbicide for a long time, which leads to the rapid occurrence of ALS herbicide-resistant weeds. ALS inhibitor herbicides have surpassed all other types of herbicides in the number of resistant weeds reported. In recent years, the weed resistance problem faced by ALS inhibitor herbicides has shown a trend of further deterioration. Therefore, how to rationally screen and compound different pesticide varieties, improve the control effect of weeds in rice fields, reduce the amount of pesticides used, reduce costs, and delay the development of weed resistance has become a research focus in the field of rice field production.

[0006] The applicant mixed iptriazopyrid with any one of ethoxysulfuron and pyrifos-butyl and found that within a certain mixing ratio range, the mixture had a synergistic effect on weed control in rice fields, had good rapidity and a long lasting effect, and effectively reduced the development of weed resistance, reduced the cost and frequency of medication, and was safer and more efficient. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that herbicides in the prior art produce resistance to rice field weeds and have poor actual control effects, and to provide a herbicidal composition with high efficiency, low toxicity, good rapid effect, long lasting effect, and conducive to the comprehensive control of rice field weeds.

[0008] Another object of the present invention is to use the herbicidal composition to control farmland weeds, especially to control rice field weeds.

[0009] The technical scheme of the present invention is as follows: an iptriazopyrid-containing herbicidal composition, wherein the herbicidal composition comprises an active ingredient A and an active ingredient B, wherein the active ingredient A is iptriazopyrid, and the active ingredient B is selected from one of ethoxysulfuron and pyrifos-butyl;

[0010] Furthermore, the mass ratio of the active ingredient A to the active ingredient B is 60:1 to 1:10;

[0011] Furthermore, the mass ratio of iptriazopyrid to ethoxysulfuron is 5:1 to 15:1;

[0012] Furthermore, the mass ratio of iptriazopyrid to saflufenacil is 12:1 to 40:1;

[0013] Furthermore, the mass percentage of the active ingredient A and the active ingredient B in the herbicidal composition is 1% to 90%;

[0014] Furthermore, the mass percentage of the active ingredient A and the active ingredient B in the herbicidal composition is 2% to 70%;

[0015] Furthermore, the herbicide composition also contains adjuvants commonly used in pesticide formulations to prepare various formulations suitable for agricultural use;

[0016] Furthermore, the auxiliary agent includes one or more of a solvent, a dispersant, an emulsifier, a wetting agent, a disintegrant, a thickener, a stabilizer, a carrier, and an antifreeze agent;

[0017] The present invention provides an iptriazopyrid-containing herbicidal composition, which can be formulated into a pesticide-acceptable formulation according to a method known to those skilled in the art, wherein the herbicidal composition is in the form of any one of powder, dispersible tablet, granule, soluble powder, soluble granule, soluble tablet, tablet, emulsion powder, emulsion granule, water-dispersible granule, wettable powder, microcapsule granule, large granule, water-dispersible tablet, microcapsule suspension, dispersible liquid, emulsifiable concentrate, emulsion granule, emulsion powder, aqueous emulsion, microemulsion, dispersible oil suspension, oil-dispersible powder, suspension, suspoemulsion, soluble solution and ultra-low volume liquid;

[0018] Furthermore, the herbicidal composition is in the form of any one of emulsifiable concentrate, water dispersible granules, wettable powder, and dispersible oil suspension;

[0019] Further, the emulsifiable concentrate may include: emulsifiers such as fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, alkylphenol polyoxyethylene polyoxypropylene ethers, castor oil ethylene oxide adducts and derivatives thereof, polyoxyethylene polyoxypropylene block copolymers, and calcium dodecylbenzene sulfonate; solvents such as one or more of trimethylbenzene, methyl oleate, N,N-dimethyldecylamide, dimethyl sulfoxide (DMSO), propylene carbonate, and fatty acid esters;

[0020] Further, the adjuvants that can be used in water dispersible granules include: dispersants such as one or more of polycarboxylates (TERSPERSE 2700, T36, GY-D06, etc.), lignin sulfonates, alkylnaphthalene sulfonates, etc.; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, etc.; disintegrants such as one or more of ammonium sulfate, sodium sulfate, polyvinyl pyrrolidone, starch or its derivatives, bentonite, etc.; binders such as one or more of starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethyl cellulose, sucrose, etc.; fillers such as one or more of diatomaceous earth, kaolin, white carbon black, calcium phosphate, talc, attapulgite, clay, etc.;

[0021] Further, the adjuvants that can be used in wettable powders include: dispersants such as polycarboxylates, lignin sulfonates, polyoxyethylene polyoxypropylene ether block copolymers, alkyl naphthalene formaldehyde condensate sulfonates, alkylphenol polyoxyethylene ether phosphates, fatty alcohol polyoxyethylene ether phosphates, alkylphenol polyoxyethylene ether sulfonates, etc.; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, alkyl naphthalene sulfonates, etc.; fillers such as one or more of ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, white carbon black, calcium phosphate, talc, attapulgite, clay, etc.;

[0022] Furthermore, the adjuvants that can be used in the dispersible oil suspension are: dispersants such as one or more of polycarboxylates, lignin sulfonates, alkylnaphthalene sulfonates (diffuser NNO), etc.; emulsifiers such as BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125, BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, Span-60# (sorbitan monostearate), Tween-60# (dehydrated sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxyethylene ether), etc. one or more of propylene oxide) and the like; one or more of wetting agents such as alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenylethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, etc.; one or more of thickeners such as white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; one or more of antifreeze agents such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride, etc.; one or more of dispersion media such as soybean oil, rapeseed oil, wheat oil, methyl oleate, diesel, engine oil, mineral oil, etc.;

[0023] 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%, solvent 1% to 90%;

[0024] 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%, filler 1% to 80%;

[0025] 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%, filler 1% to 80%;

[0026] Furthermore, the composition is a dispersible oil suspension, and the components and contents of the dispersible oil suspension are preferably: 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%.

[0027] The present invention discloses an iptriazopyrid-containing herbicidal composition and a preparation thereof for use in controlling unwanted plants;

[0028] Further, the growth site of the unwanted plants is a rice field;

[0029] Further, the undesirable plants are grass weeds, euphorbia weeds and sedge weeds in rice fields;

[0030] Furthermore, the common weeds in rice fields include: Leptochloa chinensis, Echinochloa crusgalli, Digitaria sanguinalis, Alopecuroides, Duck tongue grass, Tripterygium wilfordii, Fluttering grass, Cyperus heteromorpha, Cyperus rotundus, Ceratonia indica, Felt, Rain flower, Cyperus sedge, Firefly rush, Water chestnut, Potamogeton, Alisma orientalis, Channa intestine, Dwarf arrowhead mushroom, Arrowhead mushroom, Long-petal arrowhead mushroom, Wolf grass, Bidens pilosa, Grass dragon, Lilac Polygonum, Joint vegetable, Ear-leaf water amaranth, Water amaranth, (four-leaf) duckweed, Small algae, Vallisneria, Spirogyra, and Coix lacryma-jobi;

[0031] Furthermore, the rice field weeds are barnyard grass, Leptochloa chinensis, Pleurotus eryngii, Dalbergia vaginalis, Cyperus difformis, and Rhizoma Lupularis.

[0032] The invention has reasonable components, good weed control effect, low cost of medicine use, and its activity and weed control effect are not a simple superposition of the activities of each component, but have a significant synergistic effect, can expand the weed control spectrum, delay resistance, and have good safety for crops. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with 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, which can be used to describe the present invention and cannot be understood as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0034] Preparation Example

[0035] Example 1: 60% Iptriazopyrid·pyrimidine oxime water dispersible granules (5:1)

[0036] Formula: 50% Iptriazopyrid, 10% pyrimidine oxime, 5% polycarboxylate GY-D06, 4% sodium lauryl sulfate, 10% naphthalenesulfonate formaldehyde condensate, 6% sucrose, kaolin makes up the balance;

[0037] Preparation method: According to the formula ratio of the embodiment, the active ingredient is added to the carrier, and the surfactant and other functional additives are added thereto, mixed, and after air flow pulverization, appropriate water is added, and then the water-dispersible granule product is obtained by kneading, granulating, drying and sieving.

[0038] Example 2: 26% Iptriazopyrid·Ethoxysulfuron Water Dispersible Granules (12:1)

[0039] Formula: 24% Iptriazopyrid, 2% Ethoxysulfuron, 5% Methylnaphthalene sulfonate formaldehyde condensate, 3% Alkylphenol polyoxyethylene ether, 10% Lignin sulfonate, 5% Starch, 5% Ammonium sulfate, Kaolin makes up the balance;

[0040] Preparation method: Same as Preparation Example 1.

[0041] Example 3: 35% Iptriazopyrid·pyrimidine oxime suspending agent (6:1)

[0042] Formula: 30% Iptriazopyrid, 5% pyrimidine oxime, 3% fatty alcohol polyoxyethylene ether sulfate, 2% EO / PO block copolymer, 1.5% polycarboxylate, 2% sodium lauryl sulfate, 0.25% xanthan gum, 5% ethylene glycol, 0.5% magnesium aluminum silicate, 0.5% silicone, and water makes up the balance;

[0043] Preparation method: according to the formula ratio of the embodiment, the active ingredients, surfactants and other functional additives are placed in a reaction kettle in sequence, oil is added and mixed evenly, and the suspension product is obtained by high-speed shearing, wet sand grinding, and finally homogenization filtration.

[0044] Example 4: 21% Iptriazopyrid·Ethoxysulfuron Suspension (20:1)

[0045] Formula: 20% Iptriazopyrid, 1% Ethoxysulfuron, 1% Fatty Alcohol Polyoxyethylene Ether, 3% Styrylphenol Polyoxyethylene Ether Phosphate, 1% Polycarboxylate, 2% EO / PO Block Copolymer, 0.15% Xanthan Gum, 5% Glycerin, 0.5% Magnesium Aluminum Silicate, 0.5% Silicone, Water to Make Up the Rest;

[0046] Preparation method: Same as Preparation Example 3.

[0047] Example 5: 44% Iptriazopyrid·pyrimidine oxime wettable powder (10:1)

[0048] Formula: 40% Iptriazopyrid, 4% pyrimidine oxime, 2% sodium dodecyl sulfate, 10% sodium dodecylbenzene sulfonate, 8% polycarboxylate, 5% white carbon black, kaolin makes up the balance;

[0049] Preparation method: according to the formula ratio of the embodiment, the active ingredient is added into the carrier, and the surfactant and other functional additives are added thereto, mixed, and then air flow pulverized and mixed again to obtain the wettable powder product.

[0050] Example 6: 64% Iptriazopyrid·Ethoxysulfuron Wettable Powder (15:1)

[0051] Formula: 60% Iptriazopyrid, 4% Ethoxysulfuron, 2% Sodium Lauryl Sulfate, 8% Dispersant NNO, 8% Lignosulfonate, 3% White Carbon Black, Kaolin makes up the balance;

[0052] Preparation method: Same as Preparation Example 5.

[0053] Example 7: 4% Iptriazopyrid·pyrimidine oxime emulsifiable concentrate (7:1)

[0054] Formula: 3.5% Iptriazopyrid, 0.5% pyrimidine oxime, 20% propylene carbonate, 2% calcium dodecylbenzene sulfonate, 15% fatty alcohol polyoxyethylene ether, and trimethylbenzene to make up the balance;

[0055] Preparation method: Add the active ingredients into the carrier according to the formula ratio of the embodiment, add the surfactant and other functional additives thereto, stir and mix them evenly in a stirring mixing kettle to obtain an emulsifiable concentrate product.

[0056] Example 8: 3.4% Iptriazopyrid·Ethoxysulfuron EC (16:1)

[0057] Formula: 3.2% Iptriazopyrid, 0.2% Ethoxysulfuron, 10% Cyclohexanone, 2% Calcium Dodecylbenzenesulfonate, 10% Fatty Alcohol Polyoxyethylene Ether, 10% Epoxidized Soybean Oil, Methyl Oleate Makes Up the Balance;

[0058] Preparation method: Same as Preparation Example 7.

[0059] Example 9: 17% Iptriazopyrid·pyrimidine oxime butyl dispersible oil suspension (15:2)

[0060] Formula: 15% Iptriazopyrid, 2% pyrimidine oxime, 3% calcium dodecylbenzene sulfonate, 2% polycarboxylate, 10% castor oil polyoxyethylene ether, 5% styrylphenol polyoxyethylene ether methacrylate, 2% organic bentonite, corn oil makes up the balance;

[0061] Preparation method: according to the formula ratio of the embodiment, the active ingredients, surfactants and other functional additives are placed in a reaction kettle 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.

[0062] Example 10: 15.5% Iptriazopyrid·Ethoxysulfuron dispersible oil suspension (15:0.5)

[0063] Formula: 15% Iptriazopyrid, 0.5% Ethoxysulfuron, 3% Calcium Dodecylbenzenesulfonate, 2% Polycarboxylate, 10% Castor Oil Polyoxyethylene Ether, 5% Styrylphenol Polyoxyethylene Ether Methacrylate, 1.5% Organic Bentonite, 1.5% Fumed Silica, and the balance is made up by soybean oil;

[0064] Preparation method: Same as Preparation Example 9.

[0065] Example 11: 15% Iptriazopyrid·pyrimidine oxime emulsion in water (13:2)

[0066] Formula: 13% Iptriazopyrid, 2% pyrimidine oxime, 10% xylene, 10% cyclohexanone, 8% ethylene oxide-propylene oxide copolymer, 1% aromatic phenol ether phosphate, 5% ethylene glycol, 0.05% silicone defoamer, 0.1% xanthan gum, 0.01% kason, and water to make up the balance;

[0067] Preparation method: according to the formula ratio of the embodiment, the active ingredient is dissolved in the solvent and an emulsifier is added to dissolve it into a uniform oil phase, and deionized water and antifreeze are mixed together to form a uniform water phase; under high-speed shearing, the water phase is added to the oil phase to form a well-dispersed water emulsion product.

[0068] Example 12: 21% Iptriazopyrid·Ethoxysulfuron Emulsion in Water (20:1)

[0069] Formula: 20% Iptriazopyrid, 1% Ethoxysulfuron, 10% Xylene, 10% Cyclohexanone, 5% Epoxidized Soybean Oil, 10% Propylene Carbonate, 6% Castor Oil Oxidation, 0.05% Silicone Defoamer, 0.15% Xanthan Gum, 0.01% Kasson, and water to make up the balance;

[0070] Preparation method: Same as Preparation Example 11.

[0071] Indoor Activity Examples

[0072] Example 13: Determination of the combined effects of iptriazopyrid-containing compositions on common weeds.

[0073] Test basis: NY / T 1155.4-2006 "Pesticide Indoor Bioassay Test Guidelines Activity Determination Test Stem and Leaf Spray Method", NY / T 1155.7-2006 "Pesticide Indoor Bioassay Test Guidelines Determination of Combined Effects of Mixtures".

[0074] Test targets: Echinochloa crusgalli, Leptochloa chinensis, Pleurotus eryngii, Dalbergia vaginalis, Cyperus difformis, and Rhizoma Lupularis.

[0075] Test agents: 95% Iptriazopyrid technical, 95% Ethoxysulfuron technical, 95% Saprofenoxam technical, all of which are provided by the Group's R&D Center.

[0076] Preparation of medicine: dissolve the original medicine with a suitable solvent, dilute it with a 0.1% Tween 80 aqueous solution, and prepare it into 3 series of mass concentrations according to the arithmetic difference method for use.

[0077] Test method: Sow a certain amount of grass seeds in pots with a diameter of 9 cm, and cultivate them in a light incubator. When the weeds grow to the 1-3 leaf stage, 20 plants are selected in each pot and sprayed. After treatment, continue to cultivate in the greenhouse, regularly observe the control effect of each treatment on weeds, and record the fresh weight of each treatment after 14 days.

[0078] Experimental treatment: Each treatment was repeated 4 times, and a clear water control was set.

[0079] Data investigation and statistical analysis: After the pesticide treatment, the growth status of the weeds was observed and recorded. After 14 days of treatment, the weed control effect was investigated, the fresh weight of the weeds was recorded, and the weed control effect was calculated. The fresh weight inhibition rate of the target with different pesticide ratios was calculated according to the Gowing method.

[0080] Weed fresh weight inhibition rate (E) % = [(weed fresh weight in blank area - weed fresh weight in control area) / weed fresh weight in blank area] × 100

[0081] Theoretical fresh weight inhibition rate of mixed herbicides (E0) % = fresh weight inhibition rate of weeds by compound A at a dosage of P + fresh weight inhibition rate of weeds by compound B at a dosage of Q - (fresh weight inhibition rate of weeds by compound A at a dosage of P × fresh weight inhibition rate of weeds by compound B at a dosage of Q) / 100;

[0082] 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 synergistic effect.

[0083] The test results are as follows:

[0084] Table 1 Combined effects of Iptriazopyrid mixed with ethoxysulfuron and pyrifos-butyl on Echinochloa crusgalli and Leptochloa chinensis

[0085]

[0086]

[0087] Table 2 Combined effects of Iptriazopyrid mixed with ethoxysulfuron and pyrimidine oxime on Pleurotus eryngii and Dalbergia vaginalis

[0088]

[0089]

[0090] Table 3 Combined effects of iptriazopyrid mixed with ethoxysulfuron and pyrifos on Cyperus difformis and Psoralea corylifolia

[0091]

[0092]

[0093] The test results show (see Table 1, Table 2, Table 3) that Iptriazopyrid mixed with ethoxysulfuron and pyrifos-butyl has good indoor activity against common weeds such as Echinochloa crus-galli, Leptochloa chinensis, Jatropha indica, Dalbergia vaginalis, Cyperus difformis, and Rhizoma Lupularis, and the evaluation types of combined effects are all additive or synergistic.

[0094] Field efficacy test

[0095] Example 14: Field efficacy test of the herbicidal composition containing Iptriazopyrid.

[0096] Experimental location: conducted in direct-seeded rice fields in Anhui, sown on June 5, 2020;

[0097] Experimental design: According to the "Guidelines for Pesticide Field Efficacy Tests", the experiment has 8 treatments, each with an area of ​​30m 2 , repeated 4 times, arranged in random blocks, and each block was independently drained and irrigated.

[0098] Common weeds in rice fields: Setaria viridis, Echinochloa crusgalli, Digitaria sanguinalis, Leptochloa chinensis, Dalbergia vaginalis, Alisma orientalis, Channa chussima, and Rainforest lily;

[0099] Rice variety: Xiangzao 143;

[0100] The experimental design of the test agent is shown in Table 4 below:

[0101] Table 4 Experimental design of test drugs

[0102]

[0103]

[0104] Application time: On the morning of July 6, 2020, the pesticide was applied once, using a backpack sprayer (pressure 0.2MPa), using the stem and leaf spray method to spray evenly, with a spray volume of 450L / hm 2 When applying the medicine, the weeds are in the 2-4 leaf stage and the rice is in the 4-6 leaf stage. Manual weeding is carried out once on the day of application.

[0105] Weather conditions: The weather turned from sunny to cloudy on the test day, with an average temperature of 30°C, a maximum temperature of 35°C, a minimum temperature of 22°C, and an average relative humidity of 68%.

[0106] Survey time: Investigate the weed base before applying the drug, investigate the number of remaining weeds 30 days after applying the drug, and calculate the control effect per plant. At the same time, observe whether the rice has any symptoms of drug damage after applying the drug.

[0107] Survey method: 5-point diagonal sampling survey method, 0.25m per point 2 , investigate the number of weeds at each point.

[0108] Data analysis: The relevant calculation formula is as follows

[0109] Plant protection effect (%) = [(number of live grass in blank control area - number of remaining grass in treatment area) / number of live grass in blank control area] × 100

[0110] Fresh weight control effect (%) = [1-(fresh weight of live grass in blank control area-fresh weight of residual grass in treatment area) / fresh weight of live grass in blank control area] × 100

[0111] Data analysis: DPS software was used to perform statistical analysis on the test data of the efficacy of each treatment area, and significant difference analysis was performed, and significant differences were verified at p=0.05 and p=0.01.

[0112] Rice safety survey: visual inspection method, while investigating the efficacy of the drug, select 1 point in each plot and investigate 10 plants continuously, record the plant height, leaf color, growth status and whether the rice is damaged by the drug. If damaged, the symptoms must be recorded in detail. Finally, observe whether the rice is normal during the maturity period.

[0113] Results and Analysis:

[0114] Table 5 Control effect of the herbicidal composition containing Iptriazopyrid on weeds in rice fields

[0115]

[0116]

[0117] Table 6 The total effect of each treatment on the control of weeds in rice fields

[0118]

[0119] Note: The protective effects in the above table refer to the overall protective effects. Capital letters represent extremely significant differences at the 1% level, and lowercase letters represent significant differences at the 5% level.

[0120] As shown in Table 6, the control effects of the compound test agents such as 64% Iptriazopyrid·ethoxysulfuron wettable powder (15:1), 26% Iptriazopyrid·ethoxysulfuron water dispersible granules (13:1), 15.5% Iptriazopyrid·ethoxysulfuron dispersible oil suspension (15:0.5), 60% iptriazopyrid·pyrimidine oxime water powder granules (5:1), 44% iptriazopyrid·pyrimidine oxime wettable powder (10:1), and 17% Iptriazopyrid·pyrimidine oxime dispersible oil suspension (15:2) on conventional grass weeds and broad-leaved weeds in rice fields were all greater than 85%, and the control effects were significantly better than single-agent treatments such as 10% pyrimidine oxime emulsifiable concentrate, 15% ethoxysulfuron water dispersible granules, and 25% iptriazopyrid dispersible oil suspension.

[0121] Table 7 Results of each treatment on rice field safety test

[0122]

[0123] Safety investigation: During the trial, it was observed that all mixed pesticides were safe for rice growth and no pesticide damage occurred.

[0124] In summary, the activity and herbicidal effect of the combination of Iptriazopyrid with Ethoxysulfuron and Fenpyrimidine oxime for controlling weeds in rice fields are not a simple addition of the activities of each component. Compared with the existing single preparations, it has significant control effects on a variety of weeds, significant synergistic effects, can delay resistance, has low pesticide residues, good safety, and meets the safety requirements of pesticide preparations.

[0125] Although the present invention has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these 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 consists of an active ingredient A and an active ingredient B, wherein the active ingredient A is iptriazopyrid, the active ingredient B is ethoxysulfuron, and the mass ratio of the iptriazopyrid to ethoxysulfuron is 5:1-15:

1.

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

3. 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.

4. The herbicidal composition according to claim 3, characterized in that The auxiliary agent includes one or more of a solvent, a dispersant, an emulsifier, a wetting agent, a disintegrant, a thickener, a stabilizer, a carrier, and an antifreeze agent.

5. The herbicidal composition according to claim 4, characterized in that The herbicidal composition is in the form of any one of emulsifiable concentrate, water-dispersible granules, wettable powder and dispersible oil suspension.

6. Use of the herbicidal composition according to any one of claims 1 to 5 for controlling unwanted plants, characterized in that: The unwanted plants are barnyard grass, Leptochloa chinensis, Pleurotus eryngii, Dalbergia vaginalis, Cyperus difformis, and Rhizoma Lupularis.

7. The use according to claim 6, characterized in that: The unwanted vegetation grows in rice fields.

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