CN111789121B - Suspending agent weeding composition, preparation method thereof and weeding method - Google Patents
Suspending agent weeding composition, preparation method thereof and weeding method Download PDFInfo
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- CN111789121B CN111789121B CN202010814384.6A CN202010814384A CN111789121B CN 111789121 B CN111789121 B CN 111789121B CN 202010814384 A CN202010814384 A CN 202010814384A CN 111789121 B CN111789121 B CN 111789121B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
- A01N37/22—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides
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Abstract
The invention provides a suspending agent weeding composition, a preparation method thereof and a weeding method, wherein the weeding composition comprises effective components and auxiliary components, the effective components are quintocet and metolachlor, the weight ratio of the quintocet to the metolachlor is (1:5) - (1:20), the weight ratio of the quintocet to the metolachlor in the composition is 30-70 wt%, and the weeding composition is stable in performance and beneficial to comprehensive treatment of weeds in sorghum transplanting fields.
Description
Technical Field
The invention belongs to the field of herbicide compositions and application thereof, and particularly relates to a suspending agent herbicide composition, a preparation method thereof and a weeding method thereof.
Background
The pesticide varieties with different action mechanisms are compounded, so that the weed control spectrum can be expanded, the dosage is reduced, the control effect on weeds is effectively improved, and the problem of drug resistance of pests and weeds to a single pesticide is effectively solved. The compounding of the quintocet-mefenacet and the metolachlor in a proper proportion range has a synergistic effect on annual weeds in sorghum transplanting fields, and reports on the herbicide composition compounded by the quintocet-mefenacet and the metolachlor and application thereof are not found at present.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a suspending agent weeding composition, a preparation method thereof and a weeding method thereof, which are used for solving the problems that the single pesticide variety is easy to generate drug resistance on the weeds in the sorghum transplanting field and the control effect is not ideal in the prior art, and provide a high-efficiency and low-toxicity weeding composition which is beneficial to the comprehensive treatment of the weeds in the sorghum transplanting field.
In order to achieve the above objects and other related objects, the invention provides a suspension herbicide composition, which comprises effective components and auxiliary components, wherein the effective components comprise clethodim and metolachlor, the weight ratio of the clethodim to the metolachlor is (1:5) - (1:20), and the weight ratio of the clethodim to the metolachlor in the composition is 30-70 wt%.
In one embodiment, the weight ratio of the clethodim to the metolachlor is (1:5) - (1: 10).
In one embodiment, the weight ratio of clethodim to metolachlor is 1: 7.
In one embodiment, the auxiliary component comprises any one or more of a wetting dispersant, a thickening agent, an antifreezing agent and an antifoaming agent.
The invention also provides a preparation method of the herbicide composition, which comprises the steps of mixing the effective ingredients, the auxiliary ingredients and water, crushing and grinding to obtain the suspension herbicide composition.
The present invention provides in one aspect a method for weeding a herbicidal composition as described above, which comprises: applying the suspension herbicidal composition to the weeds or to the locus of the weeds.
In one embodiment, the herbicidal composition is applied pre-emergence.
In one embodiment, the herbicidal composition is diluted with water before application, and the weight ratio of the herbicidal composition to the water is (1-1.5): (500-600).
In one embodiment, the locus of the weeds is a sorghum transplanting field.
In one embodiment, the weeds comprise grassy weeds and non-grassy weeds, and the non-grassy weeds are any one or more of alternanthera philoxeroides, perilla frutescens, amaranth viridis, cyperus rotundus, bindweed, and tribulus terrestris.
In one embodiment, the wetting and dispersing agent may be any one or more of fatty alcohol polyoxyethylene ether, alkylaryl polyoxyethylene ether, alkylphenol polyoxyethylene phosphate, sodium lauryl polyoxyethylene ether sulfate, polyoxyethylene polyoxypropylene ether block copolymer, lignin and its derivative sulfonate, polycarboxylate, fatty alcohol ethylene oxide adduct sulfonate.
In one embodiment, the wetting and dispersing agent is polycarboxylate and alkylphenol polyoxyethylene phosphate ester, and the weight ratio of the polycarboxylate to the alkylphenol polyoxyethylene phosphate ester is (1-3): (3-6).
In one embodiment, the wetting and dispersing agent is a combination of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene phosphate.
In one embodiment, the wetting and dispersing agent is XF-650G or SC-705 model wetting and dispersing agent manufactured by Hongli source chemicals, Inc. of Nanjing Yangzi.
In one embodiment, the thickener is any one or more of xanthan gum, carboxymethyl cellulose, sodium polyacrylate, fumed silica, bentonite, and magnesium aluminum silicate.
In one embodiment, the anti-freezing agent is any one or more of ethylene glycol, propylene glycol, isopropanol, glycerin, urea, sodium chloride, and sodium acetate.
In one embodiment, the defoaming agent is any one or a combination of two of silicone type or polyether modified polysiloxane type.
In one embodiment, the weeding composition comprises the following raw materials in parts by weight: 3-6% of clethodim, 30-60% of metolachlor, 5-20% of wetting dispersant, 0.05-3% of thickening agent, 1-10% of antifreezing agent and 0.01-1% of defoaming agent.
As described above, the suspending agent herbicidal composition, the preparation method thereof and the weeding method thereof provided by the invention have the following beneficial effects: the compounding of the quintocet-mefenacet and the metolachlor expands the weed control spectrum, has a synergistic effect, obviously improves the control effect on sorghum field weeds compared with the single dose of the herbicide, can reduce the using amount of pesticides by mixing the quintocet-mefenacet and the metolachlor in a proper proportion range, reduces the using cost of the pesticides for growers, and lightens the pollution to the environment.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. Note that "%" and "part(s)" shown herein mean "% by weight" and "part(s) by weight", respectively, unless otherwise specified.
The invention firstly provides a suspending agent weeding composition, wherein the active ingredients in the weeding composition are mainly quizalofop and metolachlor, the chemical name of the quizalofop is 2- (1-methyl-3- (2, 6-dimethylphenyl) quinazoline-2, 4-diketone-6-carbonyl acyl) cyclohexane 1, 3-diketone, and the suspending agent weeding composition is a HPPD herbicide which is created by university of Mediterranean China and developed by Shandong Xiandao agriculture chemical Co. The activity of plant HPPD is inhibited, so that the process of converting p-hydroxyphenylpyruvate into homogentisate in plants is inhibited, the photosynthesis in weeds is further influenced, and the weeds are caused to have albinism and die. The fluquintocet-mexyl is the only herbicide which can simultaneously prevent and kill broadleaf weeds and gramineous weeds in sorghum fields after seedlings, is environment-friendly and has low toxicity to animals and ecology at present. In some embodiments, the weight ratio of the clethodim in the composition may be 1 to 6%, more preferably 3 to 6%, for example 5%.
The metolachlor belongs to acetamide preemergence selective herbicides, is one of amide herbicide varieties with the largest production and use amount in China, and is also one of top ten pesticide varieties sold in the world. The agent is absorbed by the base and bud of the weed seedling, inhibits protein synthesis, and affects the growth of the bud and root. Can prevent and kill off annual gramineous weeds and partial broadleaf weeds such as goosegrass herb, large crabgrass, green bristlegrass and the like in sorghum fields. Because of its broad-spectrum herbicidal activity, low cost and easy availability, it is widely used in various crops. In some embodiments, the metolachlor may be present in the composition in an amount of 30-60% by weight, more preferably 30-50% by weight, for example 35% by weight.
The weight ratio of the quintocet-mefenacet to the metolachlor in the herbicidal composition can be (1:5) - (1:20), and further can be (1:5) - (1:10), such as 1: 7. The weight ratio of the active ingredient of the present invention in the composition of the present invention may be 30 to 70 wt%, and further 30 to 60 wt%, and such composition is usually diluted with an inert carrier such as water before application.
The invention is further illustrated below by weed control tests carried out after compounding the active ingredients of the composition. What is needed is
The weed control test was carried out by an indoor activity test.
Evaluation method
The weeding activity of different proportions of the cloquintocet and the metolachlor is measured by using a room-temperature potting method, the composition is applied to soil in a form of soil spray, the soil spray is cultured at room temperature after the soil spray, and water is supplemented in a mode of irrigating at one bottom at regular intervals. The activity test can be used for evaluating the combined action type of the quintocet-mefenacet and the metolachlor combination for controlling annual weeds in sorghum fields. The spray may be a hand held sprayer. The soil for activity test is special soil for test collected in an unadministered land, the specification of the pot is d-8 cm, h-7 cm, the soil is filled to 3/4 height, a plurality of holes are punched at the bottom, and the hole diameter is 0.3-0.5 cm. Putting the pot into a plastic pot filled with a 0.8-1.5 cm shallow water layer, after the soil is completely wet, respectively and uniformly scattering weed seeds into the pot, then covering a layer of fine soil with the thickness of 0.5-1.0 cm with mixed sand, and applying the pesticide the next day after sowing. After application, the soil is cultivated in a greenhouse, and water is periodically supplemented to maintain the soil humidity of 100%.
The quintocet and the metolachlor used in the indoor activity test are provided by the institute of chemical engineering, Anhui province, the weeds of the experimental targets are digitaria sanguinalis, amaranthus retroflexus and switchgrass, which are collected from the towns and dry lands of the stream in the Jinhuawuhua city, Zhejiang province, and the seeds of the tested weed are provided by a bioassay central weed seed bank of Zhejiang Feng biological science, Ltd.
96% of clethodim TC and 98% of metolachlor TC raw materials adopted in the indoor activity test are provided by the Anhui province chemical research institute. The weeding spray for the activity test is prepared by weighing a certain amount of raw medicines, dissolving the raw medicines in a proper organic solvent to prepare a mother solution, and diluting the mother solution into a test dose by using distilled water containing 0.1 percent of Tween-80 according to the set dose.
The indoor activity test adopts a Gowing method to test the herbicidal activity of the two herbicides after mixed use, and the calculation formula of the mixed effect is as follows: e0 ═ X + Y-XY/100, where X represents the measured control of the weed by herbicide a at P; y represents the actually measured control effect of the herbicide B on the weeds with the dosage of Q; e0 represents the theoretical control effect of the herbicide (A + B) at the herbicide dosage of (P + Q); e is the actual measurement control effect after A, B is mixed; according to the Gowing method, when the E-E0 is more than 10 percent, the compounded herbicide is proved to produce synergistic effect; when the content of E-E0 is less than-10%, the mixed herbicide generates antagonism; and when the value of E-E0 is within +/-10%, the compounded herbicide has additive effect on weeds.
The test results are shown in tables 1 and 2.
TABLE 1 Quiladim and metolachlor single agents and their herbicidal activity (%) (in different proportions)
TABLE 2 Combined action type test of different proportions of Quinodim and metolachlor on each target tested
As can be seen from the table 1, the fresh weight control effect of the single clethodim on crabgrass, amaranthus retroflexus and switchgrass is 41.37-65.74%, 26.38-48.71% and 25.62-45.33% respectively; the fresh weight control effect of the metolachlor single dose on crabgrass, amaranthus retroflexus and switchgrass is 52.02-80.35%, 36.37-68.82% and 44.17-71.98% respectively.
The fresh weight control effect of the two mixed agents on the crabgrass, the amaranthus retroflexus and the switchgrass is respectively 80.45-100%, 60.75-92.26% and 66.31-93.22%, and the combined action of the two agents is remarkable for controlling and killing the effects of the crabgrass, the amaranthus retroflexus and the switchgrass, the weed control spectrum can be remarkably expanded, and the weeding activity is higher.
As can be seen from Table 2, the synergistic effect of the quinoxydim and the metolachlor on the large crabgrass and the switchgrass under the treatment of partial dosage ratio is achieved, and the combined effect types of the rest of the ratio buries on the tested weeds are additive. The combination effect, the weeding activity and the economic cost of the two mixed medicaments are comprehensively considered, and the ratio of the quintocet-mexyl to the iprodione is recommended to be 3.0-6.0: 31.5-63. The experiment shows that the synergistic coefficient of the mixed combination for controlling large crabgrass and switchgrass is the largest and the synergistic effect is the most obvious at the matching ratio of A3B1 (namely, quizalofop: metolachlor is 4.5: 31.5: 1: 7).
The herbicidal composition of the present invention may also include auxiliary ingredients, which may be some additives, which may include, but are not limited to, one or more of wetting and dispersing agents, thickeners, anti-freezing agents, and anti-foaming agents.
In an embodiment, the wetting and dispersing agent may be any one or more of fatty alcohol polyoxyethylene ether, alkylaryl polyoxyethylene ether, alkylphenol polyoxyethylene phosphate, sodium lauryl polyoxyethylene ether sulfate, polyoxyethylene polyoxypropylene ether block copolymer, lignin and its derivative sulfonate, polycarboxylate, fatty alcohol ethylene oxide adduct sulfonate, and in an embodiment, the wetting and dispersing agent may be a combination of sodium polycarboxylate and alkylphenol polyoxyethylene phosphate, and the weight percentage of the wetting and dispersing agent in the herbicidal composition may be 5% to 20%, for example 6%, 7%. The wetting dispersant can be formed by compounding a plurality of different dispersants, for example, polycarboxylate and alkylphenol polyoxyethylene phosphate ester according to the weight ratio of (1-3): (3-6), for example 3:5, and the polycarboxylate may be sodium polycarboxylate. In one embodiment, the wetting and dispersing agent is a combination of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene phosphate, such as XF-650G or SC-705 model wetting and dispersing agent manufactured by Nanjing Yangzi Hongli chemical Limited liability company, and further, may be XF-650G model.
The thickener can be any one or more of xanthan gum, carboxymethyl cellulose, sodium polyacrylate, gaseous silicon dioxide, bentonite, and magnesium aluminum silicate, and can be magnesium aluminum silicate. The weight percentage of the thickener in the herbicidal composition may be 0.05% to 3%.
The antifreeze can be any one or combination of more of ethylene glycol, propylene glycol, isopropanol, glycerol, urea, sodium chloride and sodium acetate, such as glycerol. The weight percentage of the antifreeze agent in the herbicidal composition may be 1% to 10%.
The defoaming agent can be any one or two combinations of organic silicon or polyether modified polysiloxane, such as SAG 622. The weight percentage of the defoamer in the herbicidal composition may be 0.01% to 1%.
The weeding composition is a suspending agent weeding composition, and can be prepared by a common superfine grinding method for processing pesticide suspending agents in laboratories, for example, effective components, auxiliary components and water are weighed according to a certain proportion, all raw materials are put into a grinder to be ground in advance to obtain mixed feed liquid, then the mixed feed liquid is put into a vertical sand mill to be ground, and the mixed feed liquid is subjected to high-speed shearing and mixing to obtain the suspending agent weeding composition with corresponding weight percentage, in one embodiment, the mixing speed of the sand mill is set to be 1300-1500 r/min, for example 1450r/min, and the grain size range of the grinding end point can be 2-3 mu m.
In another aspect of the present invention, there is also provided a method for weeding using the suspension concentrate herbicidal composition, which comprises: applying the suspension herbicidal composition to the weeds or to the locus of the weeds.
In one embodiment, the composition may be diluted prior to application to provide a diluted composition, the dilution may be with water, and the ratio of dilution may be in the range of the suspending herbicidal composition: water (1-1.5): (500-600), for example 1:500, 1:560, the diluted composition can be applied by taking the composition in a large number of cups, diluting the composition in a proper amount, adding a sufficient amount of water into a sprayer, uniformly mixing, and uniformly spraying. The sprayer may be a knapsack type electric sprayer, the diluted composition may be applied at an amount of 40 to 50 kg/mu, for example, 45 kg/mu, the active ingredient may be applied at an amount of 600 to 720 g/hectare, the herbicidal composition may be applied at an amount of 80 to 120 g/mu, for example, 100 g/mu, and the herbicidal composition may be applied pre-emergence after sowing.
The weeds can be annual weeds in sorghum transplanting fields, the weeds can comprise gramineous weeds and non-gramineous weeds, and the non-gramineous weeds can comprise any one or more of alligator alternanthera, purple perilla, amaranthus viridis, sedge, bindweed and tribulus terrestris.
The weed control effect of the present invention is evaluated by a specific field test.
Evaluation method
The composition comprises the following components in percentage by weight: 5% of clethodim, 35% of metolachlor, 6% of XF-650G, 2% of Z18 (magnesium aluminum silicate), 3% of glycerol, 0.5% of SAG622 (organic silicon), and the balance of deionized water to 100%.
The formula is pre-crushed according to a proportion, then the mixture is added into a vertical sand mill for grinding, and the 40 percent of the suspension agent of the quintocet-metolachlor is prepared after high-speed shearing and mixing.
The field test cultivar is sorghum (Jinnuo sunshine). The weeds to be tested are selected from alligator alternanthera, gramineae weeds, purple perilla, amaranthus rugosus, cyperus rotundus, Convolvulus arvensis, caltrop and the like. The test field soil is clay loam, the land is smooth, the irrigation and drainage are convenient, the water and fertilizer conditions are good, the content of organic matters is medium, and the pH value is 6.5-7.0. The test field is fallowed for more than 1 year, and no herbicide is used in the period. After the test field is artificially sown, a drip irrigation tape is laid after sowing, the whole field is drip-irrigated on the 2 nd day, the 7 th day, the 10 th day, the 14 th day and the 19 th day after sowing, and the diluted composition is applied on the third day after sowing.
Table 3 shows the drug classes for the field trials.
The conventional formulation in table 3 is: 5% of clethodim, 35% of metolachlor, SC-7056%, 2% of Z18 (magnesium aluminum silicate), 3% of glycerol, 0.5% of SAG622 (organic silicon) and the balance of deionized water to 100%.
TABLE 3 test design of test agents
The test is carried out for 2 times, the first investigation is carried out 10 days after the application of the herbicide, the species and the number of the treated weeds are investigated, and the control effect of the weeds is investigated; and (4) carrying out second investigation 30 days after the application of the herbicide, investigating the number of the treated weed plants, weighing the weeds, and calculating the fresh weight control effect respectively.
The field test adopts an absolute value investigation method, five points of diagonal lines of each cell are investigated, each point is 0.25 square meter, the weed species and the plant number in the selected area are investigated, the last investigation is weighed, and the control effect is calculated.
The drug effect calculation method comprises the following steps:
due to the relationship of long-term drought and growth period, weeds in the test field are mainly acalypha australis, Convolvulus arvensis, alternanthera philoxeroides and gramineous weeds, and a small amount of caltrops, cyperus rotundus and piemarker are used. Statistical results statistical analysis was performed according to both gramineae and non-gramineae, and the test results are shown in tables 4, 5 and 6.
Table 440% control efficacy (%) of Quinodim-metolachlor suspension against sorghum weed plants after application10Sky
TABLE 540% control Effect (%) of Quinodim-metolachlor suspension against sorghum weed plants after application30Sky
Table 640% Quinodim-metolachlor suspension control effect (%) for preventing and killing fresh weight of sorghum weed after application30Sky
As can be seen from table 4, the control effect of the test agent 40% suspension of clomazone-metolachlor on grassy weeds and non-grassy weeds increases with the increase of the dosage of the agent 10 days after application, the control effect on the grassy weeds is 81.82%, 94.41% and 100.00% at three concentrations of 80, 100 and 120 g/mu, respectively, and the control effect on the non-grassy weeds is 83.48%, 95.63% and 99.03% respectively, wherein the control effect on the grassy weeds and the non-grassy weeds is higher than that of the control agent of 36% suspension of metolachlor of 200 g/mu, and the control effect on the test agent of 40% suspension of clomazone-metolachlor of 100 g/mu is also higher than that of the control agent of 40% suspension of clomazone-metolachlor (conventional) of 110 g/mu.
As can be seen from table 5, the control effect of the test agent 40% of the suspension concentrate of clomazone-metolachlor on gramineous weeds and non-gramineous weeds increases with the increase of the dosage of the agent 30 days after application, the control effects of the three concentrations of 80, 100 and 120 g/mu on gramineous weeds are 77.60%, 89.07% and 99.45% respectively, the control effects on non-gramineous weeds are 82.88%, 93.48% and 98.39% respectively, the control effect of the control agent 10% of the suspension concentrate of clomazone-metolachlor on gramineous weeds and non-gramineous weeds is 94.54% and 89.69% respectively, and the control effect of the control agent 36% of the aqueous emulsion of metolachlor is 89.07% and 62.77% respectively. The control effect of 100 g/mu and 120 g/mu of the test agent on non-gramineous weeds is higher than that of two single-dose control agents, and the control effect of 100 g/mu of the test agent on gramineous and non-gramineous weeds is also higher than that of a control agent 40% clomazone-metolachlor suspending agent (conventional) which is 110 g/mu.
As can be seen from Table 6, the fresh weight control effect of the test agent 40% of the suspension concentrate of the clomazone-metolachlor on the gramineous weeds and the non-gramineous weeds is increased along with the increase of the dosage of the test agent 30 days after the application, the control effects of the three concentrations of 80, 100 and 120 g/mu on the gramineous weeds are respectively 75.74%, 87.25% and 99.48%, the control effects on the non-gramineous weeds are respectively 83.77%, 93.31% and 98.89%, the control effects of the control agent 10% of the suspension concentrate of the clomazone-metolachlor on the gramineous weeds and the non-gramineous weeds are respectively 94.64% and 90.79%, the control effects of the control agent 36% of the aqueous emulsion of the metolachlor are respectively 90.72% and 78.08%, the control effect of the control agent 40% of the suspension concentrate (conventional) on the gramineous weeds and the non-gramineous weeds are respectively 76.43% and 84.03% of the treatment effect of the test agent 40% of the non-metolachlor suspension concentrate (conventional) on the gramineous weeds and the non-gramineous weeds are respectively the best, but did not reach significant levels of difference from the control agent; the control effect of 120 g/mu of the test medicament on non-gramineous weeds is the best, and is obviously different from other treatments, and the control effect of 100 g/mu of the test medicament on gramineous and non-gramineous weeds is also obviously higher than that of a control medicament 40% cloquintocet-metolachlor suspending agent (conventional) by 110 g/mu.
The 40% clethodim-metolachlor suspending agent is compounded by clethodim and metolachlor, so that the dosage of the clethodim is reduced, the phytotoxicity risk is reduced, the synergistic effect on gramineous weeds is realized, and in some embodiments, the soil can be subjected to closed treatment by adopting the application ratio of 100-120 g/mu. In the test, the concentration of each test has no obvious phytotoxicity.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (9)
1. A suspension herbicidal composition characterized by: the composition comprises effective components and auxiliary components, wherein the effective components are clethodim and metolachlor, the weight ratio of the clethodim to the metolachlor is (1:5.25) - (1:10), and the weight ratio of the clethodim to the metolachlor in the composition is 30-70%.
2. A suspension-herbicidal composition according to claim 1, characterized in that: the auxiliary components comprise any one or a combination of more of wetting dispersant, thickening agent, antifreezing agent and defoaming agent.
3. A suspension-herbicidal composition according to claim 2, characterized in that: the wetting dispersant is any one or combination of more of fatty alcohol polyoxyethylene ether, alkylaryl polyoxyethylene ether, alkylphenol polyoxyethylene phosphate, sodium lauryl polyoxyethylene ether sulfate, polyoxyethylene polyoxypropylene ether block copolymer, lignin and derivative sulfonate thereof, polycarboxylate, fatty alcohol ethylene oxide adduct sulfonate.
4. A process for preparing a suspension-herbicidal composition according to any of claims 1 to 3, characterized in that: the suspending agent weeding composition is prepared by mixing the effective components, the auxiliary components and water, crushing and grinding.
5. A method of weeding with the suspension-herbicide-composition according to any of claims 1 to 3, characterized in that: it includes: applying the suspension herbicidal composition to the weeds or to the locus of the weeds.
6. The method of claim 5, wherein: the herbicidal composition is applied pre-emergence.
7. The method of claim 5, wherein: the weeding composition is diluted by water before application, and the weight ratio of the weeding composition to the water is (1-1.5): (500-600).
8. The method of claim 5, wherein: the place where the weeds are located is a sorghum transplanting field.
9. The method of claim 8, wherein: the weeds comprise gramineous weeds and non-gramineous weeds, and the non-gramineous weeds are any one or more of alligator alternanthera, purple perilla, amaranthus pallidus, sedge, bindweed and tribulus terrestris.
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