Herbicidal compositions and herbicides containing metal ion complexes

Abstract

The invention provides a weeding composition containing a metal ion complex. The weeding composition comprises a weeding active component A and a metal ion chelate, the weeding active component A is one or a combination of more of glufosinate-ammonium, glufosinate-ammonium salt, refined glufosinate-ammonium and refined glufosinate-ammonium salt; the metal ion chelate is one or a combination of several of o-phenanthroline, ethylenediamine tetraacetic acid, dithio-tricarboxylic acid, ethylene glycol diethyl ether diamine tetraacetic acid, 2.2 '-bipyridine, nitrilotriacetic acid, citrate, tartrate, oxalate and pyrophosphate. The weeding composition provided by the invention not only can improve the pesticide effect of glufosinate-ammonium in cloudy days and drought, but also can reduce the usage amount of glufosinate-ammonium and relieve environmental pressure, and is more environment-friendly.

Description

Technical Field

[0001] The invention belongs to the field of pesticides, and in particular relates to a weed killing composition and a weed killer containing a metal ion complex. Background Art

[0002] Glufosinate is a non-selective herbicide. Its mechanism of action is to inhibit the activity of glutamine synthetase in plants, resulting in the blockage of glutamine synthesis, disorder of nitrogen metabolism, and accumulation of ammonium ions, thereby interfering with plant metabolism and causing plant death. Glufosinate is chiral and usually produces L-type and D-type racemates. Subsequent studies have found that L-glufosinate has a herbicidal effect, while D-glufosinate has no herbicidal activity, and L-glufosinate is called refined glufosinate. Glufosinate has the characteristics of a wide spectrum of weed control, high activity, low toxicity, easy degradation in soil, safety for crops, small drift, good environmental compatibility and rapid weed control. It can prevent and quickly kill more than 100 annual and perennial broad-leaved weeds and grass weeds such as crabgrass and ryegrass. With the promotion and application of glufosinate transgenic technology, glufosinate has become the world's second largest transgenic crop herbicide.

[0003] Although glufosinate has the above advantages and has become the second most lethal herbicide after glyphosate, there are still many problems in its use. For example, the efficacy of glufosinate is easily affected by external factors. Inappropriate temperature, humidity and light will reduce its herbicidal activity, resulting in a significant reduction in the herbicidal effect of glufosinate in some special environments; at low temperatures, the ability of glufosinate to pass through the cuticle and cell membrane will be reduced, thus affecting the herbicidal effect of glufosinate. It is usually recommended to use glufosinate at temperatures above 15°C; in arid climates, in order to reduce transpiration, plants close stomata, curl leaves, and thicken leaf skin, which is not conducive to the absorption of glufosinate and affects its efficacy. Therefore, the use of glufosinate is limited in the north during winter, early spring, low temperatures and droughts. Even if it is used, a larger dose is required, which not only increases the cost of medication, but also easily leads to weed resistance.

[0004] In summary, it is of great significance to study herbicide combinations that can exert better efficacy under cloudy and drought conditions. Summary of the invention

[0005] In order to overcome the problem in the prior art that the efficacy of glufosinate herbicides is easily affected by environmental factors such as cloudy days and drought, a herbicide composition and a herbicide containing a metal ion complex are provided, which can not only improve the efficacy of glufosinate on cloudy days and droughts, but also reduce the amount of glufosinate used, reduce environmental pressure, and be more environmentally friendly.

[0006] The basic concept of the technical solution of the present invention is as follows:

[0007] A herbicidal composition containing a metal ion complex, comprising a herbicidal active ingredient A and a metal ion chelate;

[0008] The herbicidal active ingredient A is one or a combination of glufosinate ammonium, glufosinate ammonium salt, refined glufosinate ammonium and refined glufosinate ammonium salt;

[0009] The metal ion chelate is one or a combination of o-phenanthroline, ethylenediaminetetraacetic acid, dithiotriazinepentacarboxylic acid, ethylene glycol diethyl ether diaminetetraacetic acid, 2,2'-bipyridine, nitrilotriacetic acid, citrate, tartrate, oxalate, and pyrophosphate.

[0010] As one embodiment, the metal ion chelate is o-phenanthroline, 2,2'-bipyridine or sodium pyrophosphate, preferably o-phenanthroline.

[0011] As one embodiment, the mass ratio of the herbicidal active ingredient A to the metal ion chelate is (0.75-48):1, preferably (1.875-6):1, and more preferably 6:1.

[0012] As a method, it also includes a herbicidal active ingredient B; the herbicidal active ingredient B is one or more of triketones, pyrazoles, pyridines, sulfonylureas, sulfonamides, pyrimidine salicylates, imidazolinones, aromatic oxyphenoxypropionates, phenoxycarboxylic acids, triazines, amides, dinitroanilines, cyclohexenones, ureas, diphenyl ethers, cyclic imides, carbamates, organophosphorus, and bipyridine herbicides.

[0013] As one embodiment, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (0.75-60):(0.025-0.9):1.

[0014] As one method, when the herbicidal active ingredient A is glufosinate-ammonium, the herbicidal active ingredient B is fenpyroxil, and the metal ion chelate is o-phenanthroline, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (1.875-6):(0.075-0.5):1.

[0015] As one embodiment, when the herbicidal active ingredient A is glufosinate-ammonium, the herbicidal active ingredient B is high-efficiency fluazifop-p-ethyl, and the metal ion chelate is 2.2'-bipyridyl, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (1.5-24):(0.025-1):1, preferably 6:0.25:1.

[0016] As one embodiment, when the herbicidal active ingredient A is glufosinate ammonium, the herbicidal active ingredient B is difluanid, and the metal ion chelate is sodium pyrophosphate, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (1.875-30):(0.03125-2):1, preferably 1.875:0.5:1.

[0017] The present invention provides a glufosinate herbicide, comprising the herbicidal composition containing the metal ion complex as described in any one of the above contents and an adjuvant.

[0018] As one mode, the content of the herbicidal composition containing the metal ion complex is 1% to 90% by mass, preferably 5% to 90%.

[0019] Optionally, the auxiliary agent is a combination of one or more of a surfactant, a solvent, a filler, a thickener, a defoaming agent, and an antifreeze agent.

[0020] Optionally, the surfactant is selected from one or a combination of nonylphenol polyoxyethylene ether, long-chain quaternary ammonium salt, N-alkyl betaine, alkyl glucoside, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate or tallow amine.

[0021] Optionally, the solvent is one or a combination of solvent oil, methyl oleate, cyclohexanone, decanoic acid amide or N,N-dimethylformamide.

[0022] Optionally, the filler is one or a combination of kaolin, diatomaceous earth, and ammonium sulfate.

[0023] Optionally, the thickener is one or both of xanthan gum and gum arabic.

[0024] Optionally, the defoamer is one or a combination of silicone defoamers, polyether defoamers, and polyether-modified silicone defoamers.

[0025] Optionally, the antifreeze agent is one or a combination of polyethylene glycol, urea, and propylene glycol methyl ether.

[0026] Optionally, the dosage form is a soluble solution, an aqueous emulsion, a wettable powder, a soluble powder, a soluble granule, a water-dispersible granule, an aqueous suspension, an oil suspension, a microcapsule suspension, a tablet or an effervescent granule.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] (1) The herbicidal combination of the present invention is diluted and sprayed onto the leaves of weeds. Part of the liquid medicine slides into the soil, and the metal chelates contained in the liquid medicine form stable complexes with trace elements such as iron, zinc, and copper in the soil, which are more easily absorbed by the weeds, thereby improving the respiration and photosynthesis of the weeds. The enhanced photosynthesis prompts the weeds to open more stomata to absorb carbon dioxide in the air. At this time, the opening of the stomata also promotes the weeds to absorb (fine) glufosinate ammonium, thereby improving the efficacy of (fine) glufosinate ammonium when used under drought conditions.

[0029] (2) The herbicidal composition of the present invention improves the herbicidal activity of glufosinate ammonium under cloudy and drought conditions to 2 times or more than that of the prior art, and can extend the effective period of the agent to 6-8 weeks.

[0030] (3) Compared with the traditional single agent, the herbicidal composition of the present invention reduces the amount of pesticides used and can achieve the same or even better weed control effect while reducing the amount of pesticides used by 50%. It is not only convenient to use, but also can reduce the pesticide costs of farmers.

[0031] (4) The herbicidal composition of the present invention has a broad weed control spectrum and can effectively control grass weeds, broad-leaved weeds and sedge weeds, such as goosegrass, foxtail grass, barnyard grass, Erigeron candidum, prickly lettuce, lettuce, dayflower, quinoa, Amaranthus australis, Cyperus difformis, Cyperus rotundus, and Tripterygium wilfordii. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Glufosinate is a racemic form of L-type and D-type glufosinate, and L-type and D-type each account for 50%. L-type and D-type glufosinate are both shown as glufosinate content during analysis. For example, 45% of 90% of glufosinate is D-type glufosinate, which does not exert its efficacy, while refined glufosinate is L-type glufosinate that exerts its efficacy. Therefore, when the amount is equal, the efficacy of refined glufosinate is twice that of glufosinate. The following formula optimization test provides content using glufosinate as an example, and the actual optimized formula range is also applicable to refined glufosinate.

[0034] Herbicidal composition

[0035] Several exemplary formulations of herbicidal compositions suitable for cloudy and arid environments are provided (see Tables 1 to 3), and a combined toxicity test is conducted.

[0036] (1) Purpose of the test

[0037] The inhibitory effects of compositions of glufosinate ammonium + benzathine + o-phenanthroline, glufosinate ammonium + high-efficiency fluazifop-p-ethyl + 2.2'-bipyridine, glufosinate ammonium + fluazifop-p-ethyl + sodium pyrophosphate in different mixing ratios on goosegrass were determined under greenhouse potted conditions, and their combined effects were evaluated. The relevant results are shown in Tables 1 to 3.

[0038] (2) Test methods

[0039] With Eleocharis serrata, Erigeron chinensis, and Cyperus rotundus as the research objects, a plastic flower pot with a diameter of 7 / 9 cm was filled with air-dried fine soil to 4 / 5 of the pot, and the plastic flower pot was placed in a plastic turnover box with water to completely moisten the soil through bottom infiltration. 20 seeds were evenly sown in each pot. When the weeds grew to the 2-3 leaf stage, the stems and leaves were treated with a spray tower. Each treatment was repeated 4 times, and a blank control was set. After the liquid was dried, the test materials were placed in a greenhouse for cultivation. The greenhouse simulated a cloudy and arid environment, the soil moisture content was kept below 15%, the light / darkness was 14h / 10h, the light intensity was 800LUX, and the temperature was set at a minimum of 20℃ and a maximum of 25℃. The damage to the weeds was observed 20 days after the drug was applied, and the fresh weight of the aboveground part was weighed. The toxicity of the drug on the weeds was evaluated by the inhibition rate of the target weeds.

[0040] The evaluation method for the combined effect of binary mixtures refers to the Gowing method in the combined effect determination of mixtures in the indoor bioassay guidelines for pesticides.

[0041] Fresh weight inhibition rate % = (blank control fresh weight - treatment fresh weight) / blank control fresh weight × 100

[0042] E0=X+Y–XY / 100

[0043] In the above formula, X represents the weed control effect of glufosinate ammonium when the dosage is P; Y represents the weed control effect of metal ion chelate when the dosage is Q; E0 represents the theoretical control effect of the herbicide combination when the herbicide dosage is (P+Q). According to the Gowing method, when E-E0>10%, it means that the mixed herbicide produces a synergistic effect; when E-E0<-10%, it means that the mixed herbicide produces an antagonistic effect; when the E-E0 value is between ±10%, it means that the mixed herbicide produces an additive effect. In the formula, E represents the actual control effect % of each treatment.

[0044] The evaluation method for the combined effect of ternary mixtures refers to the Golby method in the combined effect determination of mixtures in the indoor bioassay guidelines for pesticides.

[0045] Fresh weight inhibition rate % = (blank control fresh weight - treatment fresh weight) / blank control fresh weight × 100

[0046] E0=XYZ / 10000

[0047] In the above formula, E0 is the theoretical fresh weight survival rate after the herbicide is compounded, X represents the measured fresh weight survival rate of glufosinate when the dosage is P, Y represents the measured fresh weight survival rate of herbicide B when the dosage is Q, Z represents the measured fresh weight survival rate of metal ion chelate when the dosage is W, E0 is the theoretical weed survival rate of the herbicide combination when the dosage is (P+Q+W), and E is the actual weed survival rate of each treatment. According to the Golby method, when E0-E>10%, it is expressed as a synergistic effect, when -10<E0-E<10, it is expressed as an additive effect, and when E0-E≤-10, it is expressed as an antagonistic effect.

[0048] Table 1 The results of the combined toxicity test of glufosinate + o-phenanthroline on Glechoma longituba

[0049]

[0050]

[0051] The results in Table 1 show that the herbicidal composition of the present invention has a synergistic effect on orthosiphon ammonium within the range of (0.75-48):1 of the mass ratio of glufosinate-ammonium: o-phenanthroline. When the mass ratio is (1.875-6):1, the effect is relatively better, especially when the mass ratio is 6:1.

[0052] Table 2 The results of the combined toxicity test of glufosinate + fenpyroxil + o-phenanthroline on Glechoma longituba

[0053]

[0054]

[0055] The results in Table 2 show that the herbicidal composition of the present invention has a synergistic effect on Goosegrass when the mass ratio of glufosinate: fenacet: o-phenanthroline is in the range of (0.75-60):(0.025-0.9):1, wherein the synergistic effect is better when the mass ratio is (1.875-6):(0.075-0.5):1, and is most obvious when the mass ratio is 3:0.075:1.

[0056] Table 3 The results of the combined toxicity test of glufosinate-ammonium + haloxyfop-ethyl + 2.2'-bipyridyl on Glechoma longituba

[0057]

[0058]

[0059] The results in Table 3 show that the herbicidal composition of the present invention has a synergistic effect on oriolus when the ratio of glufosinate:halpyr-ethyl:2.2'-bipyridyl is in the range of (1.5-24):(0.025-1):1, and is most obvious when the ratio is 6:0.25:1.

[0060] Table 4 The results of the combined toxicity test of glufosinate ammonium + difluanid + sodium pyrophosphate on goosegrass

[0061]

[0062]

[0063] The results in Table 4 show that the herbicidal composition of the present invention has a synergistic effect on ornithogalum in the range of glufosinate: difluanid: sodium pyrophosphate (1.875-30): (0.03125-2): 1, and is most obvious when the ratio is 1.875:0.5:1.

[0064] herbicide

[0065] The glufosinate herbicide comprises a herbicidal composition containing a metal ion complex and an adjuvant.

[0066] The auxiliary agent is a combination of one or more of a surfactant, a solvent, a carrier or an auxiliary material.

[0067] As an example, the surfactant can be selected from: N-carboxyethyl fatty amide salt, perfluoroalkyl carboxylate, alkyl sulfonate, fatty alcohol ether sulfate, alkylbenzene sulfonate, fatty acid ethylene sulfonate, olefin sulfonate, alkyl phosphate ester salt, butylnaphthalenesulfonic acid sodium salt, naphthalenesulfonic acid formaldehyde condensate (NNO), fatty alcohol ether phosphate ester salt, long-chain alkylamine and its salt, polyoxyethylene etherified long-chain amine and its salt, long-chain quaternary ammonium salt, polyoxyethylene etherified quaternary ammonium salt, N-alkyl-β-aminopropionic acid, N-alkylaminodipropionic acid, N-alkyl betaine, sulfobetaine, 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazole One or any combination of the following additives: phenoxyethylene, sucrose ester, fatty acid sorbitan, alkyl polyglucoside, phenylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether ester, nonylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, polyethylene glycol oleate, glycerol oleate, polyglycerol oleate, ethoxylated fatty acid sorbitan ester, sorbitan laurate, oleic acid polyoxyethyl ester, polysorbitan oleate, tristyrylphenol ethoxylate, ethylene oxide and phenylene oxide block copolymer, EO-PO butyl ether block copolymer, and tallow amine additives.

[0068] As an example, the solvent is selected from: one or more of mineral oil, leaf wax oil, soybean oil, methyl oleate, decantamide, benzene, toluene, xylene, solvent oil, N,N-dimethylformamide, cyclohexanone, ethyl acetate, methanol, ethanol, ethylene glycol, polyethylene glycol, propylene glycol, glycerol, isopropanol or water.

[0069] As an example, the filler is selected from: one or more of: clay, diatomaceous earth, kaolin, activated white clay, bentonite, talc, silica powder, ammonium sulfate, potassium sulfate, soluble starch, light calcium, white carbon black, attapulgite, sepiolite, montmorillonite, polyvinyl pyrrolidone, methyl cellulose, carboxymethyl cellulose, sodium polyacrylate, and sodium carboxymethyl cellulose.

[0070] As an example, the thickener is selected from: xanthan gum, gum arabic, pectin, agar, gelatin, alginate, carrageenan, dextrin, polysaccharide derivatives, propylene glycol alginate, sodium starch phosphate, sodium alginate, casein, and polyoxyethylene.

[0071] As an example, the defoamer is selected from: one or more of: silicone defoamer, polyether defoamer, mineral oil defoamer, polyether modified silicone defoamer, new self-emulsifying defoamer, and high-carbon alcohol defoamer.

[0072] As an example, the antifreeze agent is selected from one or more of urea, methanol, ethanol, ethylene glycol, polyethylene glycol, propylene glycol, glycerol, isopropanol, and propylene glycol methyl ether.

[0073] Example 1

[0074] Provided is a soluble herbicide, wherein the raw materials for preparation include, by mass percentage:

[0075] Glufosinate-ammonium 24%, o-phenanthroline 4%, fatty alcohol polyoxyethylene ether sodium sulfate 10%, propylene glycol methyl ether 4%, deionized water added to 100%.

[0076] Example 2

[0077] A microemulsion herbicide is provided, wherein the raw materials for preparation include, by mass percentage:

[0078] Glufosinate 15%, benzathine 3%, o-phenanthroline 4%, solvent oil 6%, sulfobetaine 10%, alkyl polyglucoside 5%, polyether defoamer 0.05% and glycerol 4%, deionized water added to 100%.

[0079] Example 3

[0080] A herbicide in the form of a water suspension is provided, wherein the raw materials for preparation include, by weight percentage:

[0081] Glufosinate 24%, fenpyroxene 1%, DTPA (dithiotriazole pentacarboxylic acid) 8%, alkyl phosphate ester 3%, alkyl sulfonate 2%, silicone defoamer 0.05%, xanthan gum 0.2%, urea 3%, deionized water added to 100%.

[0082] Example 4

[0083] Provided is a dispersible oil suspension type herbicide, wherein the raw materials for preparation include, by mass percentage:

[0084] 10% glufosinate ammonium, 2% fenpyroxil, 6% EGTA (ethylene glycol diethyl ether diaminetetraacetic acid), 1% long-chain quaternary ammonium salt, 9% sulfobetaine, 0.05% mineral oil defoamer, 5% polyethylene glycol, 0.1% gum arabic, and methyl oleate added to 100%.

[0085] Example 5

[0086] A herbicide in the form of soluble granules is provided, wherein the raw materials for preparation include, by mass percentage:

[0087] 50% glufosinate ammonium, 5% fenpyrazone, 5% EDTA (ethylenediaminetetraacetic acid), 10% sodium sulfate of fatty alcohol polyoxyethylene ether, 0.05% polyether modified silicone defoamer, 5% ammonium sulfate, and diatomaceous earth added to 100%.

[0088] Example 6

[0089] Provided is a microemulsion herbicide, wherein the raw materials for preparation include, by mass percentage:

[0090] Glufosinate-ammonium 14%, high-efficiency fluazifop-p-ethyl 2%, 2.2'-bipyridyl 2%, cyclohexanone 10%, N-alkylaminodipropionic acid 2%, nonylphenol polyoxyethylene ether 4%, high carbon alcohol defoamer 0.05%, propylene glycol 5%, and deionized water added to 100%.

[0091] Example 7

[0092] Provided is a dispersible oil suspension herbicide, wherein the preparation raw materials include, by mass percentage:

[0093] 15% glufosinate ammonium, 6% high-efficiency fluazifop-p-butyl, 9% NTA (nitrilotriacetic acid), 3% sorbitan laurate, 1% tristyrylphenol ethoxylate, 0.05% polyether defoamer, and methyl oleate added to 100%.

[0094] Example 8

[0095] Provided is a water dispersible granule herbicide, wherein the raw materials for preparation include, by mass percentage:

[0096] 60% refined glufosinate, 6% high-efficiency fluazifop-p-ethyl, 12% sodium citrate, 5% long-chain quaternary ammonium salt, 0.05% polyether defoamer, and kaolin added to 100%.

[0097] Example 9

[0098] Provided is a wettable powder herbicide, wherein the raw materials for preparation include, by mass percentage:

[0099] Glufosinate ammonium 45%, high-efficiency fluazifop-p-ethyl 5%, potassium hydrogen tartrate 8%, sucrose ester 8%, fatty acid sorbitan 2%, polyether modified silicone defoamer 0.05%, ammonium sulfate 6%, kaolin added to 100%.

[0100] Example 10

[0101] Provided is a microemulsion herbicide, wherein the raw materials for preparation include, by mass percentage:

[0102] Glufosinate 18%, difluanid 2%, sodium pyrophosphate 5%, caprylic acid 15%, castor oil polyoxyethylene ether 8%, alkyl betaine 4%, mineral oil defoamer 0.05%, polyethylene glycol 2%, deionized water added to 100%.

[0103] Embodiment 11

[0104] Provided is a water emulsion type herbicide, wherein the raw materials for preparation include, by mass percentage:

[0105] 24% glufosinate ammonium, 3% difluanid, 5% sodium pyrophosphate, 10% N,N-dimethylformamide, 5% nonylphenol polyoxyethylene ether, 5% tallow amine, 0.05% silicone defoamer, 4% ethylene glycol, and deionized water added to 100%.

[0106] Example 12

[0107] Provided is a water dispersible granule herbicide, wherein the raw materials for preparation include, by mass percentage:

[0108] Glufosinate ammonium 65%, difluanid 2%, sodium pyrophosphate 12%, fatty acid polyoxyethylene ether 5%, polyether defoamer 0.01%, ammonium sulfate added to 100%.

[0109] Embodiment 13

[0110] Provided is a herbicide in the form of a soluble granule formulation, wherein the raw materials for preparation include, by mass percentage:

[0111] Glufosinate ammonium 47%, difluanid 3%, sodium pyrophosphate 8%, naphthalenesulfonic acid formaldehyde condensate 6%, ammonium sulfate 10%, polyether defoamer 0.03%, kaolin added to 100%.

[0112] Comparative Example 1

[0113] Provided is a glufosinate-ammonium-containing herbicide, which is a soluble solution. The preparation raw materials include, by mass percentage, 24% glufosinate-ammonium, 10% sodium sulfate of fatty alcohol polyoxyethylene ether, 4% propylene glycol methyl ether, and deionized water added to 100%.

[0114] Compared with Example 1, o-phenanthroline is missing.

[0115] Comparative Example 2

[0116] Provided is a herbicide containing glufosinate-ammonium and high-efficiency haloxyfop-methyl, which is a microemulsion. The preparation raw materials include, by mass percentage, 14% of glufosinate-ammonium, 2% of high-efficiency haloxyfop-methyl, 10% of cyclohexanone, 2% of N-alkylaminodipropionic acid, 4% of nonylphenol polyoxyethylene ether, 0.05% of a high-carbon alcohol defoamer, 5% of propylene glycol, and deionized water added to 100%.

[0117] Compared with Example 6, 2,2'-bipyridine is missing.

[0118] Comparative Example 3

[0119] Provided is a herbicide containing high-efficiency haloxyfop-methyl and 2.2'-bipyridine, which is a microemulsion. The preparation raw materials include, by mass percentage, 2% of high-efficiency haloxyfop-methyl, 2% of 2.2'-bipyridine, 10% of cyclohexanone, 2% of N-alkylaminodipropionic acid, 4% of nonylphenol polyoxyethylene ether, 0.05% of defoaming agent, 5% of propylene glycol, and deionized water added to 100%.

[0120] Field efficacy test

[0121] (1) Test environment: wasteland in Ordos City, Inner Mongolia, with an orange drought warning in summer. The total rainfall in the local area in the six months before the test was 23.6 ml. The weeds in the test area were mainly Chenopodium album, Setaria viridis, and Yantai floating grass, with a small amount of Shepherd's purse and Commelina communis.

[0122] (2) Test agent: the preparations provided in herbicide Examples 1-13.

[0123] (3) Control agents: the preparations provided in Comparative Examples 1 to 3, 200 g / L glufosinate aqueous solution (commercially available), and 20% glufosinate-isothiazolinone microemulsion (commercially available), wherein "%" represents the content of active ingredients in the corresponding agent.

[0124] (4) Test method: According to the area of ​​the test plot, accurately weigh various pesticides, dilute with water, and use a backpack sprayer to spray evenly. Use a fan-shaped nozzle specially designed for herbicides. When spraying, pay attention to spraying the liquid evenly into the test plot, without overspraying or missing any pesticides. After spraying, set up a shade curtain on the test site to simulate the state of insufficient sunlight on a cloudy day.

[0125] (5) Results investigation: The weed mortality was observed 30 and 60 days after application, and the herbicidal activity of each treatment was compared. The efficacy results are shown in Table 5.

[0126] In Table 5, the letters ah after the protective effect are the labels of significance analysis. Different letters indicate significant differences. A represents the best efficacy, and so on in alphabetical order. H represents the worst efficacy.

[0127] Table 5 Fresh weight control effect on field weeds

[0128]

[0129] The results in Table 5 show that the herbicidal composition suitable for cloudy and arid environments of the present invention can significantly improve the efficacy of glufosinate-ammonium under drought conditions compared with the traditional single agent. The efficacy is twice or more of that of the single agent at the same dosage of the active ingredient, and is even better than the single agent with a higher dosage. Compared with commercially available compound preparations, the efficacy is better, the lasting effect is longer, and the weed control spectrum is wider.

Claims

1. A herbicidal composition containing a metal ion complex, comprising a herbicidal active ingredient A and a metal ion chelate; The herbicidal active ingredient A is one or a combination of glufosinate ammonium, glufosinate ammonium salt, refined glufosinate ammonium and refined glufosinate ammonium salt; The metal ion chelate is one or a combination of o-phenanthroline, ethylenediaminetetraacetic acid, dithiotriazinepentacarboxylic acid, ethylene glycol diethyl ether diaminetetraacetic acid, 2,2'-bipyridine, nitrilotriacetic acid, citrate, tartrate, oxalate, and pyrophosphate.

2. The herbicidal composition containing a metal ion complex according to claim 1, characterized in that: The metal ion chelate is o-phenanthroline, 2,2'-bipyridine or sodium pyrophosphate, preferably o-phenanthroline.

3. The herbicidal composition containing a metal ion complex according to claim 1, characterized in that: The mass ratio of the herbicidal active ingredient A to the metal ion chelate is (0.75-48):1, preferably (1.875-6):1, and more preferably 6:

1.

4. The herbicidal composition containing a metal ion complex according to claim 1, characterized in that: It also includes a herbicidal active ingredient B; the herbicidal active ingredient B is one or more of triketones, pyrazoles, pyridines, sulfonylureas, sulfonamides, pyrimidine salicylates, imidazolinones, aromatic oxyphenoxypropionates, phenoxycarboxylic acids, triazines, amides, dinitroanilines, cyclohexenones, ureas, diphenyl ethers, cyclic imides, carbamates, organophosphorus, and bipyridine herbicides.

5. The herbicidal composition containing a metal ion complex according to claim 4, characterized in that: The mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (0.75-60):(0.025-0.9):

1.

6. The herbicidal composition containing a metal ion complex according to claim 5, characterized in that: When the herbicidal active ingredient A is glufosinate ammonium, the herbicidal active ingredient B is fenpyroxil, and the metal ion chelate is o-phenanthroline, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (1.875-6):(0.075-0.5):

1.

7. The herbicidal composition containing a metal ion complex according to claim 5, characterized in that: When the herbicidal active ingredient A is glufosinate ammonium, the herbicidal active ingredient B is haloxyfop-ethyl, and the metal ion chelate is 2.2'-bipyridyl, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (1.5-24):(0.025-1):1, preferably 6:0.25:

1.

8. The herbicidal composition containing a metal ion complex according to claim 5, characterized in that: When the herbicidal active ingredient A is glufosinate, the herbicidal active ingredient B is difluanid, and the metal ion chelate is sodium pyrophosphate, the mass ratio of the herbicidal active ingredient A, the herbicidal active ingredient B and the metal ion chelate is (1.875-30):(0.03125-2):1, preferably 1.875:0.5:

1.

9. A glufosinate herbicide comprising the herbicidal composition containing the metal ion complex according to any one of claims 1 to 8 and an adjuvant.

10. The glufosinate-ammonium herbicide according to claim 9, characterized in that: In terms of mass percentage, the content of the herbicidal composition containing the metal ion complex is 1% to 90%, preferably 5% to 90%; Optionally, the auxiliary agent is a combination of one or more of a surfactant, a solvent, a filler, a thickener, a defoamer, and an antifreeze agent; Optionally, the surfactant is selected from one or a combination of nonylphenol polyoxyethylene ether, long-chain quaternary ammonium salt, N-alkyl betaine, alkyl glucoside, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate or tallow amine; Optionally, the solvent is one or a combination of solvent oil, methyl oleate, cyclohexanone, decanoic acid amide or N,N-dimethylformamide; Optionally, the filler is one or a combination of kaolin, diatomaceous earth, and ammonium sulfate; Optionally, the thickener is one or both of xanthan gum and gum arabic; Optionally, the defoamer is one or a combination of silicone defoamer, polyether defoamer, polyether-modified silicone defoamer; Optionally, the antifreeze agent is one or a combination of polyethylene glycol, urea, and propylene glycol methyl ether; Optionally, the dosage form is a soluble solution, an aqueous emulsion, a wettable powder, a soluble powder, a soluble granule, a water-dispersible granule, an aqueous suspension, an oil suspension, a microcapsule suspension, a tablet or an effervescent granule.

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