A herbicidal composition containing cyclobenzyl ketone

Abstract

This invention relates to a herbicidal composition containing cyclobenzanone and its uses. The herbicide composition has active ingredient A as cyclobenzanone and active ingredient B selected from any one of bensulfuron-methyl, pyrimifluazuron, and bispyribac-sodium, wherein the weight ratio of the two active components is 1:50-50:1. It is used for weed control in rice paddies, particularly for controlling grasses, broadleaf weeds, and sedges. Compared to single-agent herbicides, this herbicidal composition improves efficacy, delays weed resistance development, has a broad spectrum of weed control, a long residual effect, and is safe for both rice and subsequent crops.

Description

[0001] This invention application is a divisional application of application number 201910887351.1, filed on September 19, 2019, entitled "A herbicidal composition containing cyclobenzyl ketone". Technical Field

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

[0003] Rice is highly adaptable and widely cultivated, and is one of the world's major food crops, as well as my country's largest food crop. According to national weed survey data, there are more than 200 species of weeds in my country's rice paddies, of which more than 20 are considered particularly harmful. Rice paddy weeds are classified into three categories: grasses, broadleaf weeds, and sedges.

[0004] In recent years, due to the long-term and extensive use of the same type of herbicide by growers, weeds in rice paddies have become increasingly resistant, resulting in decreasing efficacy of conventional herbicides and seriously affecting rice yields. Reports from multiple regions across the country indicate that barnyard grass in rice paddies has developed severe resistance to several major herbicides, such as penflusulfuron, bispyribac-sodium, quinclorac, pyrimiflusulfone, and propargite. Simultaneously, many broadleaf grasses and sedges, such as *Hemiberlesia lataniae*, *Monochoria vaginalis*, and *Impatiens balsamina*, have also developed severe resistance to herbicides like bensulfuron-methyl and pyrimisulfuron. Developing a pesticide composition suitable for use in rice paddies, providing efficient and safe control of various weeds, especially resistant and difficult-to-control weeds, has become an important direction in pesticide research and development.

[0005] Cyclohexanil is a cyclohexanone oxime herbicide and a fatty acid synthase inhibitor. It inhibits acetyl-CoA carboxylase (ACAase) and is selective for rice because it degrades rapidly on rice, thus reducing the amount transported to the site of action. It is translocated to the meristematic tissues within the plant, causing weeds to stop growing and their leaves to turn yellow or red. It can be used to control grassy weeds in paddy fields.

[0006] Benthiamethoxam is an oxyacetamide herbicide that selectively inhibits cell division and growth. It is mainly used in pre- or early post-emergence stages in transplanted rice fields to control grassy weeds.

[0007] Pyrimidine oxime is a pyrimidine benzoic acid herbicide that mainly inhibits the synthesis of branched-chain amino acids. It can be used for post-emergence weed control, controlling barnyard grass and wheatgrass in wheat and rice fields.

[0008] Bismuth subsalicylate is a pyrimidine benzoic acid herbicide that mainly inhibits the synthesis of branched-chain amino acids. It can be used to control monocotyledonous, sedge, and broadleaf weeds, especially barnyard grass in direct-seeded rice fields.

[0009] The combination of different herbicides offers advantages such as broad-spectrum weed control, improved efficacy, delayed weed resistance development, and time and labor savings. Through pesticide formulation screening, control effects can be effectively improved, dosage reduced, costs lowered, and the development of herbicide resistance in diseases, insects, and weeds delayed, making it an important means of integrated agricultural management. The inventors of this invention conducted in-depth research on formulations of cyclobenzanone mixed with one of bensulfuron-methyl, pyrimimethoxam, or bispyribac-sodium. They discovered that cyclobenzanone, when mixed with one of bensulfuron-methyl, pyrimimethoxam, or bispyribac-sodium within a certain mixing ratio range, has a synergistic effect on weed control in rice paddies. Further research led to the completion of this invention. Summary of the Invention

[0010] The purpose of this invention is to solve the problems of herbicides developing resistance to weeds in farmland and poor actual control effects in the prior art, and to provide a herbicidal composition that is highly efficient, low in toxicity, fast-acting, and has a long-lasting effect, which is beneficial to the integrated management of weeds in farmland.

[0011] Another object of the present invention is to use the composition for the control of weeds in farmland, especially for the control of weeds in rice paddies.

[0012] The technical solution of the present invention is as follows:

[0013] A herbicidal composition containing cyclobenzanone, wherein the active ingredients include active ingredient A and active ingredient B, wherein active ingredient A is cyclobenzanone, and active ingredient B is selected from any one of bensulfuron-methyl, pyrimimethoxam, and bispyribac-sodium.

[0014] Furthermore, in the herbicidal composition, the weight ratio of active ingredient A to active ingredient B is 1:50-50:1;

[0015] Furthermore, in the herbicidal composition, the weight ratio of active ingredient A to active ingredient B is 1:1-20:3;

[0016] Furthermore, in the herbicidal composition, the weight ratio of active ingredient A to active ingredient B is 5:4-20:1;

[0017] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzyl to bensulfuron is 5:4-20:1, the weight ratio of cyclobenzyl to pyrimimethoxam is 5:4-20:1, and the weight ratio of cyclobenzyl to bispyribac-sodium is 1:1-20:3.

[0018] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to benthiamethoxam is 5:2-20:1;

[0019] Furthermore, the herbicidal composition can be used to control grassy weeds, preferably one or two of barnyard grass and Echinochloa crus-galli.

[0020] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to benthiamethoxam is 5:4-10:1;

[0021] Furthermore, the herbicidal composition can be used to control broadleaf weeds, preferably duckweed;

[0022] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to benthiamethoxam is 5:4-20:1;

[0023] Furthermore, the herbicidal composition can be used to control sedges, preferably Cyperus difformis;

[0024] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to benthiamethoxam is 5:2-10:1, preferably 5:2 or 10:1;

[0025] Furthermore, the herbicidal composition can be used to control grass weeds, broadleaf weeds and sedge weeds, wherein the weeds are one or more of barnyard grass, Echinochloa crus-galli, Monochoria vaginalis, and Cyperus difformis;

[0026] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzyl to pyrimisulfuron is 5:4-20:1;

[0027] Furthermore, the herbicidal composition can be used to control grassy weeds, preferably one or two of barnyard grass and rice grass;

[0028] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzyl to pyrimisulfuron is 5:4-10:1;

[0029] Furthermore, the herbicidal composition can be used to control broadleaf weeds, preferably arrowhead.

[0030] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzyl to pyrimisulfuron is 5:4-10:1;

[0031] Furthermore, the herbicidal composition can be used to control sedges, preferably *Scirpus spp.*

[0032] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzyl to pyrimimethoxam is 5:4-10:1, preferably 5:4, 5:2, or 10:1;

[0033] Furthermore, the herbicidal composition can be used to control grass weeds, broadleaf weeds and sedge weeds, wherein the weeds are one or more of barnyard grass, rice grass, arrowhead, and flat-stemmed sedge;

[0034] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to bispyribac-sodium is 5:4-10:3;

[0035] Furthermore, the herbicidal composition can be used to control grassy weeds, preferably barnyard grass;

[0036] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to bispyribac-sodium is 1:1-5:2;

[0037] Furthermore, the herbicidal composition can be used to control broadleaf weeds, preferably one or two of duckweed and arrowhead.

[0038] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to bispyribac-sodium is 1:1-5:2;

[0039] Furthermore, the herbicidal composition can be used to control sedges, preferably Cyperus difformis;

[0040] Furthermore, in the herbicidal composition, the weight ratio of cyclobenzanone to bispyribac-sodium is 5:4-5:2, preferably 5:4, 5:3, or 5:2;

[0041] Furthermore, the herbicidal composition can be used to control grass weeds, broadleaf weeds and sedge weeds, wherein the weeds are one or more of barnyard grass, duckweed, arrowhead, and sedge.

[0042] The total weight of the active ingredients in the herbicidal composition accounts for 1% to 90% of the total weight of the composition, preferably 10% to 80%.

[0043] This invention provides a herbicidal composition containing active ingredient A. The herbicidal composition can be formulated into pesticide-acceptable formulations, including solid formulations and liquid formulations, according to methods known to those skilled in the art.

[0044] Further, the solid dosage form is a powder, dispersible tablet, granule, soluble powder, soluble granule, soluble tablet, tablet, milk powder, milk granule, water-dispersible granule, wettable powder, microcapsule granule, powder, large granule, or water-dispersible tablet;

[0045] Furthermore, the liquid formulation is a microcapsule suspension, a dispersible liquid, an emulsifiable concentrate, an emulsion granule, an oil emulsion, an emulsion powder, an aqueous emulsion, a microemulsion, a dispersible oil suspension, an oil-dispersible powder, a suspension, a suspension emulsion, a soluble concentrate, or an ultra-low volume liquid.

[0046] Furthermore, the preferred dosage form of the formulation is a dispersible oil suspension, a suspension, a wettable powder, or a water-dispersible granule;

[0047] 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.

[0048] Furthermore, the adjuvants that can be used in suspension concentrates include: dispersants such as one or more of polycarboxylate, lignin sulfonate, and alkyl naphthalene sulfonate (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 16. One or more of the following: 01# (phenylethylphenol polyoxyethylene polyoxypropylene ether); one or more of the following wetting agents: alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenylethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate; one or more of the following thickeners: silica, polyvinyl alcohol, bentonite, magnesium aluminum silicate; one or more of the following antifreeze agents: ethylene glycol, propylene glycol, glycerin, urea, inorganic salts such as sodium chloride; and deionized water as the carrier.

[0049] Furthermore, the additives that can be used in wettable powders include: dispersants such as one or more of polycarboxylate, lignin sulfonate, polyoxyethylene polyoxypropylene ether block copolymer, alkylnaphthalene formaldehyde condensate sulfonate, alkylphenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether phosphate, and alkylphenol polyoxyethylene ether sulfonate; wetting agents such as one or more of alkyl sulfate, alkyl sulfonate, and alkylnaphthalene sulfonate; and fillers such as one or more of ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, silica, light calcium carbonate, talc, attapulgite, and clay.

[0050] 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, light calcium carbonate, talc, attapulgite, clay, etc.

[0051] 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 0.1-100 parts, active ingredient B 0.1-100 parts, dispersant 1-15 parts, emulsifier 0.5-20 parts, wetting agent 1-10 parts, thickener 1-10 parts, antifreeze 0-10 parts, and the remaining amount is made up with dispersion medium;

[0052] Furthermore, the composition is a suspending agent, and the components and contents of the suspending agent are preferably as follows: active ingredient A 0.1-100 parts, active ingredient B 0.1-100 parts, dispersant 1-15 parts, emulsifier 0.5-20 parts, wetting agent 1-10 parts, thickener 1-10 parts, antifreeze 0-10 parts, and deionized water to make up the balance;

[0053] Furthermore, the composition is a wettable powder, and the components and contents of the wettable powder are preferably: 0.1-100 parts of active ingredient A, 0.1-100 parts of active ingredient B, 1-20 parts of dispersant, 1-15 parts of wetting agent, and filler to make up the balance;

[0054] Furthermore, the composition is a water-dispersible granule, and the components and contents of the water-dispersible granule are preferably as follows: 0.1 to 100 parts of active ingredient A, 0.1 to 100 parts of active ingredient B, 1 to 15 parts of dispersant, 1 to 10 parts of wetting agent, 1 to 15 parts of disintegrant, 1 to 10 parts of binder, and filler to make up the balance.

[0055] 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 superposition 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, meeting the safety requirements of pesticide formulations. Detailed Implementation

[0056] 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. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the protection scope of this invention.

[0057] Formulation preparation examples

[0058] Example 1: 25% Cyclobutrazol·Bissodium dispersible oil suspension (4:1)

[0059] Formula: 20% cyclobenzanone, 5% bispyribac-sodium, 2% sodium polycarboxylate, 4% agricultural emulsion 1601#, 3% Tween-60#, 4% agricultural emulsion 2201, 1% sodium alkyl sulfate, 0.5% bentonite, 5% propylene glycol, soybean oil to make up the balance;

[0060] Preparation method: According to the formula ratio, the active ingredients cyclobenzyl ketone, bispyribac-sodium, surfactant and other functional adjuvants are placed in the reaction vessel in sequence, mixed with oil, and then subjected to high-speed shearing, wet sand milling and finally homogenized filtration to obtain the product.

[0061] Example 2: 14% Cyclobutrazol·Benztiachlor suspension (5:2)

[0062] Formula: 10% cyclobenzanone, 4% benzthiamethoxam, 10% dodecyl polyoxyethylene ether phosphate, 2% sodium alkyl polyoxyethylene ether sulfonate, 0.4% magnesium aluminum silicate, 0.2% carboxyethyl cellulose, 4% sorbitol, 0.1% sodium benzoate, 0.5% silicone oil, deionized water to make up the balance;

[0063] Preparation method: According to the formula ratio, the active ingredients cyclobenzyl ketone, benthiamethoxam, surfactant and other functional adjuvants are placed in the reaction vessel in sequence, water is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling, and finally homogenized filtration to obtain the product.

[0064] Example 3: 22% Cyclobutrazol·Benztiachlor wettable powder (10:1)

[0065] Formula: 20% cyclobenzanone, 2% benzyl thiamethoxam, 4% sodium lignosulfonate, 5% fatty alcohol polyoxyethylene ether phosphate, 4% sodium polycarboxylate, 3% sodium alkyl sulfate, 3% silica, talc to make up the balance;

[0066] Preparation method: According to the formulation ratio in the example, the active ingredients cyclobenzyl ketone and benthiamethoxam are added to the carrier, and surfactants and other functional adjuvants are added to it. After mixing, the mixture is pulverized by air jet and then mixed again to obtain a wettable powder.

[0067] Example 4: 12% Cyclobutrazol·Pyrimisulfuron water-dispersible granules (5:1)

[0068] Formula: 10% cyclobenzyl, 2% pyrimisulfonyl, 3% polycarboxylate T36, 4% sodium dodecyl sulfate, 1% sodium alkyl sulfonate, 2% glucose, talc to make up the balance;

[0069] Preparation method: According to the formulation ratio in the example, the active ingredients cyclobenzyl ketone and pyrimidine oxime ether are added to the carrier, and surfactants and other functional adjuvants are added thereto. After mixing, the mixture is pulverized by air jet and 25% water is added. Then, the mixture is kneaded, granulated, dried and sieved to obtain the water-dispersible granule product.

[0070] The formulation examples above can be used to randomly replace bensulfuron-methyl, pyrimisulfuron-methyl, and bispyribac-sodium to form new formulations.

[0071] Indoor Active Examples

[0072] Example 5: Determination of the combined effects of a composition containing cyclobenzyl ketone on common weeds in paddy fields.

[0073] 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 / T1155.7-2006 "Guidelines for Indoor Bioassay of Pesticides: Determination of Combined Effects of Mixtures".

[0074] Test targets: barnyard grass, Echinochloa crus-galli, Rhizophora oryzae, Monochoria serratifolia, Sagittaria sagittifolia, Cyperus difformis, and Curcuma spp.

[0075] Test reagents: 92% cyclobenzanone technical grade, 95% bensulfuron technical grade, 96% pyrimimethoxam technical grade, and 95% bispyribac-sodium technical grade. The above technical grades were provided by the R&D Center of Hailier Pharmaceutical Group.

[0076] Preparation of the drug: Dissolve the drug in a suitable solvent and dilute it with a 0.1% Tween 80 aqueous solution. Prepare five series of mass concentrations according to the same ratio and set aside for later use.

[0077] 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 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.

[0078] Experimental treatment: Each treatment was repeated 4 times, with a water control included.

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

[0080] Weed fresh weight control efficacy (E) = [(fresh weight of weeds in the control area - fresh weight of weeds in the blank area) / fresh weight of weeds in the control area] × 100

[0081] The theoretical control efficacy (E0) of the mixed herbicide = weed control efficacy of compound A at dosage P + weed control efficacy of compound B at dosage Q - (weed control efficacy of compound A at dosage P × weed control efficacy of compound B at dosage Q) / 100;

[0082] 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.

[0083] The test results are as follows:

[0084] Table 1. Combined effects of cyclobenzanone and benthiamethoxam on barnyardgrass and duckweed.

[0085]

[0086]

[0087] Table 2. Combined effects of cyclobenzanone and benthiamethoxam on *Echinochloa crus-galli* and *Cyperus difformis*.

[0088]

[0089] Indoor activity tests showed (see Tables 1 and 2) that the mixture of cyclobenzanone and benthiamethoxam exhibited good indoor activity against grassy weeds, broadleaf weeds, and sedges. When the mixing ratio of cyclobenzanone to benthiamethoxam was 5:4–20:1, the indoor activity against grassy weeds, broadleaf weeds, and sedges was additive or synergistic. When the mixing ratio of cyclobenzanone to benthiamethoxam was 5:2–20:1, the indoor activity against grassy weeds showed a synergistic effect. When cyclobenzanone and benthiamethoxam were mixed at a ratio of 5:4 to 10:1, the indoor activity against broadleaf weeds was enhanced. When cyclobenzanone and benthiamethoxam were mixed at a ratio of 5:4 to 20:1, the indoor activity against sedge weeds was enhanced. In summary, when cyclobenzanone and benthiamethoxam were mixed at a ratio of 5:2 to 10:1, they all showed good indoor activity against grass weeds, broadleaf weeds, and sedge weeds, and the overall indoor activity was better at the mixing ratios of 5:2 and 10:1.

[0090] Table 3. Combined effects of cyclobenzyl acetonide and pyrimimethoxam on barnyardgrass and arrowhead.

[0091]

[0092]

[0093] Table 4. Combined effects of cyclobenzyl oxychloride and pyrimimethoxam mixture on *Rhizophora oryzae* and *Scirpus spp.*

[0094]

[0095] Indoor activity tests showed (see Tables 3 and 4) that the mixture of cyclobenzanil and pyrimiflunomide exhibited good indoor activity against grassy weeds, broadleaf weeds, and sedges. When the mixing ratio of cyclobenzanil to pyrimiflunomide was 5:4–20:1, the indoor activity against grassy weeds, broadleaf weeds, and sedges was additive or synergistic. When the mixing ratio of cyclobenzanil to pyrimiflunomide was 5:4–20:1, the indoor activity against grassy weeds showed a synergistic effect. The combination of cyclobenzanil and pyrimiflunomide... When the ratio of pyrimifluoxetine to cyclohexime showed a synergistic effect on broadleaf weeds in the laboratory, the activity of cyclohexime and pyrimifluoxetine in the laboratory was enhanced. When the ratio of cyclohexime and pyrimifluoxetine to cyclohexime showed a synergistic effect on sedge weeds in the laboratory, the activity of cyclohexime and pyrimifluoxetine in the laboratory was enhanced. In summary, when the ratio of cyclohexime and pyrimifluoxetine to cyclohexime showed a synergistic effect on grass weeds, broadleaf weeds and sedge weeds in the laboratory, the overall activity of cyclohexime and pyrimifluoxetine in the laboratory was enhanced when the ratio of cyclohexime and pyrimifluoxetine to cyclohexime showed a synergistic effect on sedge ... activity of cyclohexime and pyrimifluoxetine in the laboratory was enhanced when the ratio of cyclohexime and pyrimifluoxetine to cyclohexime showed a synergistic effect on sedge weeds, broadleaf weeds and sedge weeds in the laboratory, the activity of cyclohexime

[0096] Table 5. Combined effects of cyclobenzyl and bispyribac-sodium mixtures on barnyardgrass and duckweed.

[0097]

[0098] Table 6. Combined effects of cyclobenzyl and bispyribac-sodium mixtures on arrowhead and sedge.

[0099]

[0100]

[0101] Indoor activity tests showed (see Tables 5 and 6) that the mixture of cyclobenzanil and bispyribac-sodium exhibited good indoor activity against grassy weeds, broadleaf weeds, and sedges. Mixture ratios of cyclobenzanil and bispyribac-sodium ranging from 1:1 to 20:3 showed additive or synergistic effects on grassy weeds, broadleaf weeds, and sedges. Mixture ratios of cyclobenzanil and bispyribac-sodium ranging from 5:4 to 10:3 showed a synergistic effect on grassy weeds. Cyclobenzanil and bispyribac-sodium showed... When the ratio of bispyribac-sodium to bispyribac-sodium was 1:1-5:2, it showed a synergistic effect on the indoor activity against broadleaf weeds. When the ratio of cyclobenzyl to bispyribac-sodium was 1:1-5:2, it showed a synergistic effect on the indoor activity against sedges. In summary, when the ratio of cyclobenzyl to bispyribac-sodium was 5:4-5:2, it showed good indoor activity against grass weeds, broadleaf weeds and sedges, and the overall indoor activity was better at the ratios of 5:4, 5:3 and 5:2.

[0102] Field efficacy trials

[0103] Example 6: Test reagents: Formulations from Examples 1, 3, and 4.

[0104] Control agents: 10% bensulfuron-methyl suspension concentrate, 5% pyrimifluazuron emulsifiable concentrate, 5% bispyribac-sodium suspension concentrate

[0105] Target weeds for control: barnyard grass, arrowhead, sedge, and other weeds in paddy fields.

[0106] Experimental method: Accurately weigh all types of pesticides according to the area of ​​the test plot, dilute with water, and then spray evenly using a backpack sprayer with a fan-shaped nozzle specifically designed for herbicides. During spraying, ensure the pesticide solution is evenly distributed throughout the test plot to prevent over-spraying or missed areas.

[0107] Following the experiment, weed mortality was observed 30 days after application, and the herbicidal activity of various herbicides was compared. Additionally, crop growth was observed 1, 7, and 15 days after application to assess any potential phytotoxicity.

[0108] Formula for calculating drug efficacy:

[0109]

[0110]

[0111]

[0112] Crop safety survey:

[0113] Observe whether the pesticide causes phytotoxicity to rice, and record the type and degree of phytotoxicity. Record the following: Assign a score to each plot of phytotoxicity according to the phytotoxicity grading method.

[0114] Level 1: The rice is growing normally and shows no signs of damage;

[0115] Level 2: Slight pesticide damage to rice, with damage less than 10%;

[0116] Level 3: Moderate pesticide damage to rice, which can recover and will not affect yield;

[0117] Level 4: Severe pesticide damage to rice, difficult to recover from, resulting in reduced yield;

[0118] Level 5: Severe pesticide damage to rice, irreversible, resulting in significant yield reduction or complete crop failure.

[0119] Experimental results:

[0120] Table 7. Field efficacy results of herbicidal compositions containing cyclobenzyl in rice paddies.

[0121]

[0122] As shown in Table 7, the composition of this invention has good control efficacy against common grass and broadleaf weeds in paddy fields, and its control efficacy is significantly better than that of single agents. The corrected efficacy of the composition was above 90% 30 days after application, which is significantly superior to that of single agents.

[0123] Table 8 Field safety results for each treatment

[0124]

[0125] As shown in Table 8, the composition of the present invention has no effect on rice growth within the tested dosage range.

[0126] The herbicidal composition of the present invention has a broadened herbicidal spectrum, improved herbicidal activity, and good rapid and sustained effects; moreover, the rice grew well during the test and no herbicide spots were observed, indicating that the above-mentioned agents are all safe for rice.

Claims

1. A herbicidal composition containing cyclobenzyl ketone, characterized in that, The composition consists of active ingredient A and active ingredient B, wherein active ingredient A is cyclobenzanone and active ingredient B is benthiamethoxam, and the weight ratio of active ingredient A to active ingredient B is 5:4 to 20:

1.

2. The herbicidal composition according to claim 1, characterized in that, The weight percentages of active ingredients A and B account for 1% to 95% of the total content.

3. The herbicidal composition according to claim 1, characterized in that, The weight percentages of active ingredients A and B account for 10% to 80% of the total content.

4. The herbicidal composition according to claim 1, characterized in that, The herbicidal composition formulation is any one of dispersible oil suspension, suspension, wettable powder, or water-dispersible granules.

5. The use of the herbicidal composition according to any one of claims 1-4 for controlling unwanted plants, characterized in that, The unwanted plant growing location is a rice paddy; the controlled plant is duckweed, and the mass ratio of active ingredient A to active ingredient B is 5:4; the controlled plant is Echinochloa crus-galli, and the mass ratio of active ingredient A to active ingredient B is 10:1 or 20:1; the controlled plant is Cyperus difformis, and the mass ratio of active ingredient A to active ingredient B is 5:4, 10:1, or 20:1.

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