CN111328822A - Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof - Google Patents
Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof Download PDFInfo
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- CN111328822A CN111328822A CN202010312378.0A CN202010312378A CN111328822A CN 111328822 A CN111328822 A CN 111328822A CN 202010312378 A CN202010312378 A CN 202010312378A CN 111328822 A CN111328822 A CN 111328822A
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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
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof
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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
- 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
- A01N25/30—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 characterised by the surfactants
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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
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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Abstract
The invention relates to the technical field of herbicides, and particularly discloses a mesosulfuron and florasulam compound dispersible oil suspension agent which is prepared from the following raw materials in parts by weight: 2-5% of mesosulfuron-methyl, 0.5-2% of florasulam, 3-10% of compound emulsifier, 10-20% of dispersant, 1-5% of thickener, 1-5% of wetting agent and solvent oil, wherein the balance is up to 100%; the compound emulsifier is prepared from a hydrophilic emulsifier and a lipophilic emulsifier, wherein the weight ratio of the hydrophilic emulsifier to the lipophilic emulsifier is 1:3-3.5: 0.5; the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam has the advantages of good emulsibility after being diluted by water and uniform texture of formed emulsion; also provides a preparation method of the dispersible oil suspending agent compounded by the mesosulfuron-methyl and the florasulam.
Description
Technical Field
The invention relates to the technical field of herbicides, and in particular relates to a mesosulfuron-methyl and florasulam compounded dispersible oil suspension and a preparation method thereof.
Background
The pesticide dispersible oil suspending agent is a liquid preparation with active ingredients stably suspended in a liquid incompatible with water, and is used by diluting and blending with water and then spraying weeds. The pesticide dispersible oil suspending agent has the advantages of safety, environmental protection, good pesticide effect, good adhesiveness, strong spreadability, strong rain erosion resistance and the like, and becomes a hotspot for the development of pesticide formulations in the last 10 years.
The dispersing medium of the pesticide dispersible oil suspending agent comprises vegetable oil, mineral oil, higher aliphatic hydrocarbon, polyalcohol and the like. Like the aqueous suspension concentrate, the pesticide dispersible oil suspension concentrate is also a highly dispersed multiphase system, the thermodynamic stability and the kinetic stability are poor, the pesticide dispersible oil suspension concentrate takes oil as a dispersion medium, the oil has different performance from water, the density of the oil is lower than that of the water, if the pesticide dispersible oil suspension concentrate is directly added into the water, the oil can float on the water surface, the dispersion of the pesticide in the water can be seriously influenced, and therefore, different from the aqueous suspension concentrate, a certain amount of emulsifier needs to be added into the oil suspension concentrate in the processing process.
The pesticide emulsifier plays a role in original incompatible two-phase liquid, so that one phase of liquid is stably dispersed in the other phase by tiny oil droplets to form transparent or semitransparent emulsion, and the auxiliary agent with the characteristic is called as the emulsifier. Emulsifiers are measured by their HLB value (hydrophilic-hydrophobic balance) to determine the degree of hydrophilicity or lipophilicity. Hydrophilic emulsifier with HLB value of 8-18, such as Tween, water soluble monovalent metal soap, lecithin, and vegetable gum, and can form O/W type emulsion; lipophilic emulsifiers with an HLB value of between 3 and 8, such as higher alcohols, Span (Span) type, divalent metal soaps, etc., can form W/O type emulsions. In the using process of the emulsifier, the emulsifier can be used through the compatibility of the emulsifiers with different HLB values, so that a better emulsifying effect can be obtained.
The dispersible oil suspension concentrate compounded by the mesosulfuron and the florasulam is a pesticide preparation which is widely applied at present and aims at annual weeds in wheat fields. For example, chinese patent publication No. CN107156163A discloses a herbicidal composition containing mesosulfuron and florasulam, which comprises 4 parts of mesosulfuron, 2 parts of florasulam, 3 parts of fatty alcohol-polyoxyethylene ether, 5 parts of styrylphenol polyoxyethylene ether, 0.5 part of xanthan gum, 1 part of sodium benzoate, 0.5 part of organosilicon, and solvent oil in an amount up to 100 parts. The preparation method of the weeding composition of mesosulfuron-methyl and florasulam comprises the following steps: pumping the raw materials into a preparation kettle, mixing and stirring, primarily grinding by a colloid mill, finely grinding by a sand mill, filtering after sampling and analyzing to be qualified, metering, packaging and warehousing.
Through the process, the pesticide preparation for annual weeds in the wheat fields can be prepared. However, under the influence of the emulsifier, the emulsion obtained by diluting the methyldisulfuron and florasulam compounded dispersible oil suspending agent with water is not uniform, so that the concentrations of the active ingredients methyldisulfuron and florasulam in the obtained emulsion are not uniform, the active ingredients sprayed on the surfaces of weeds are not uniform, the active ingredients on the surfaces of some weeds are too low to kill, and the expected weeding effect cannot be achieved in actual use.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide a mesosulfuron-methyl and florasulam compounded dispersible oil suspending agent which has the advantage that after being diluted with water, the oil suspending agent is uniformly dispersed in the water.
The second purpose of the invention is to provide a preparation method of the dispersible oil suspending agent compounded by mesosulfuron-methyl and florasulam.
In order to achieve the first object, the invention provides the following technical scheme:
a mesosulfuron and florasulam compound dispersible oil suspending agent is prepared from the following raw materials in parts by weight: 2-5% of mesosulfuron-methyl, 0.5-2% of florasulam, 3-10% of compound emulsifier, 10-20% of dispersant, 1-5% of thickener, 1-5% of wetting agent and solvent oil, wherein the balance is up to 100%; the compound emulsifier is prepared from a hydrophilic emulsifier, a lipophilic emulsifier and methyl oleate, wherein the weight ratio of the hydrophilic emulsifier to the lipophilic emulsifier is 1:3-3.5: 0.5.
By adopting the technical scheme, the hydrophilic emulsifier and the lipophilic emulsifier are selected to be compounded to form the compound emulsifier, the hydrophilic emulsifier and the lipophilic emulsifier are compounded to play a role in synergy, so that the surface tension of the compounded emulsifier is smaller than that of the emulsifier used alone, the surface performance of the emulsifier is improved, the emulsifying effect of the prepared mesosulfuron-methyl and florasulam compound dispersible oil suspending agent is better, the interfacial tension of micro-droplets of the dispersible oil suspending agent is greatly reduced after the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent is diluted by water, the volume of the micro-droplets formed by the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent in water is smaller, the obtained emulsion is uniform in texture and is kept stable, so that the effective components are uniformly distributed in the emulsion, and the concentration of the effective components is an important factor for weed control, the compound emulsifier is adopted, so that the concentration of the effective components sprayed on the stems and leaves of the weeds is uniform, and the wheat can be well prevented; in the prior art, a single emulsifier or a plurality of emulsifiers with similar HLB values are adopted, so that emulsion formed by diluting the prepared pesticide oil suspension and water is not uniform, active ingredients in the emulsion are not uniformly distributed, the concentration of the active ingredients sprayed on the surfaces of weeds is not uniform, the probability of death of the weeds is reduced, and the control effect on the weeds cannot achieve the expected effect.
Preferably, the hydrophilic emulsifier is polyoxyethylene sorbitan monooleate, and the lipophilic emulsifier is calcium dodecylbenzene sulfonate.
By adopting the technical scheme, the polyoxyethylene sorbitan monooleate and the calcium dodecylbenzene sulfonate are compounded to play a role in synergy, so that the surface tension of the compound emulsifier is greatly reduced, and the compound emulsifier with better emulsifying effect is obtained.
Preferably, the weight ratio of the hydrophilic emulsifier to the lipophilic emulsifier is 2:2-3: 1.
By adopting the technical scheme, when the weight ratio of the hydrophilic emulsifier to the lipophilic emulsifier is within the range of 2:2-3:1, the surface tension of the obtained compound emulsifier is minimum, so that the emulsibility of the mesosulfuron-methyl and florasulam compound dispersible oil suspension agent is better.
As a preferred scheme, the preparation method of the compound emulsifier comprises the following steps:
1) mixing methyl oleate and lipophilic emulsifier and stirring uniformly to obtain a mixture A;
2) and adding the hydrophilic emulsifier into the mixture A, and continuously stirring uniformly to obtain the compound emulsifier.
By adopting the technical scheme, the lipophilic emulsifier is dissolved in the methyl oleate, and then the hydrophilic emulsifier is added, so that the lipophilic emulsifier and the hydrophilic emulsifier are easily mixed uniformly.
Preferably, the solvent oil is vegetable oil.
By adopting the technical scheme, compared with other solvent oils, the vegetable oil is easier to degrade and is beneficial to environmental protection.
As a preferable scheme, the yield of the dispersible oil suspending agent compounded by the mesosulfuron-methyl and the florasulam is 15-20g per mu, and the water consumption for dilution is 40 kg.
By adopting the technical scheme, when the dosage of the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam is within the range of 15-20g per mu, a better weed control effect can be obtained.
As a preferable scheme, the dispersible oil suspension agent compounded by the mesosulfuron and the florasulam is applied to stems and leaves of wheat in the 3-leaf stage and weeds in the 2-4-leaf stage.
By adopting the technical scheme, the weed control effect is better in the period, and the toxicity to wheat is not easy to generate.
The second purpose of the invention is realized by the following technical scheme:
a preparation method of a mesosulfuron-methyl and florasulam compound dispersible oil suspending agent comprises the following preparation steps:
1) sequentially adding vegetable oil, a dispersing agent, a wetting agent and a compound emulsifier, and uniformly stirring to obtain a mixture B;
2) adding mesosulfuron-methyl and florasulam into the mixture B, continuously stirring uniformly, and then putting into a sand mill for grinding to obtain a mixture C;
3) and adding a thickening agent into the mixture C, and continuously stirring until the mixture C is uniform to obtain the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent.
By adopting the technical scheme, the vegetable oil, the dispersing agent, the wetting agent and the compound emulsifying agent are stirred and uniformly mixed to obtain a mixture B, namely a solution of the vegetable oil, the mesosulfuron and the florasulam are added to be ground to obtain a mixture C, and the thickening agent is added to be stirred to obtain the mesosulfuron and the florasulam compound dispersible oil suspending agent.
In conclusion, the invention has the following beneficial effects:
(1) according to the invention, the hydrophilic emulsifier and the lipophilic emulsifier are compounded to form the compound emulsifier, the emulsibility of the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent is improved by adding the compound emulsifier, and an emulsion with uniform texture can be formed after the emulsion is diluted by water; when the active ingredient in the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam used per mu is 0.6g, the control effect on gramineous weeds in a wheat field can reach 97.5 percent to the maximum extent, the control effect on broadleaf weeds can reach 98.0 percent to the maximum extent, and under the condition of good control effect on weeds in the wheat field, the dosage of the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam is reduced, and the environment protection requirement is responded.
(2) The dispersible oil suspending agent compounded by the mesosulfuron and the florasulam can form emulsion with uniform texture after being diluted by water, and oil drops are not easy to form on the surface of the emulsion, so that when weeds in a wheat field are sprayed, active ingredients of pesticides on the surfaces of the weeds are uniformly attached to the surfaces of stems and leaves of the weeds, the weeds are easy to wither, and the wheat field can obtain better control effect.
Detailed Description
The present invention will be described in further detail with reference to examples.
Raw materials
The lipophilic emulsifier adopts calcium dodecyl benzene sulfonate, has the purity of 99 percent and is selected from Wuhan Dahuawei industry pharmaceutical chemical Co Ltd; the hydrophilic emulsifier adopts polyoxyethylene sorbitan monooleate with the model of T-80, and is selected from Haian petrochemical plants of Jiangsu province; the active ingredients are mesosulfuron-methyl and florasulam, the original medicines are adopted, the purities are respectively 95 percent and 96 percent, and the active ingredients are respectively selected from Hubei Cat's Vol biological medicine company and Hubei Kangbao Tai fine chemical industry company; the dispersant adopts calcium lignin iodate, has the molecular weight of 800-10000 and is selected from Shenyang Xingzheng and chemical engineering limited company; the wetting agent adopts sodium dodecyl benzene sulfate, has the purity of 98.5 percent and is selected from Delong chemical Co., Ltd; the thickener is organic bentonite with model number of BENGEL 958, and is selected from Shanghai Kay chemical industry; the solvent oil is vegetable oil selected from Lanyan New energy technology GmbH.
Preparation examples 1 to 5
Preparing compound emulsifier-1, compound emulsifier-2, compound emulsifier-3, compound emulsifier-4 and compound emulsifier-5: the raw materials are shown in table 1, methyl oleate is added into a mixing kettle, a lipophilic emulsifier is added into a reaction kettle and stirred uniformly to obtain a mixture A, a hydrophilic emulsifier is added into the mixing kettle, and stirring is continued to be uniform to obtain the compound emulsifier-1. The effective component in each compound emulsifier is the total content of lipophilic emulsifier and hydrophilic emulsifier.
TABLE 1 amount of each component of each compounded emulsifier
Examples 1 to 3
The contents of the components of the methyldisulfuron and the florasulam compounded dispersible oil suspending agent in the embodiments 1 to 3 are shown in the table 2,
the processing operation steps of the embodiments 1 to 3 are the same, and the processing operation is specifically as follows:
1) adding solvent oil, a dispersing agent, a wetting agent and a compound emulsifier-1 into a mixing kettle, and uniformly stirring to obtain a mixture B;
2) adding the active ingredients of the mesosulfuron-methyl and the florasulam into the mixture B, continuously stirring for 1h, and then putting the mixture into a sand mill for grinding for 2h to obtain a mixture C;
3) and adding a thickening agent into the mixture C, and continuously stirring until the mixture C is uniform to obtain the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent.
TABLE 2 raw material composition and content of Mesosulfuron-methyl and florasulam compounded dispersible oil suspension
Examples 4 to 6
The content of each component of the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent in the embodiment 4-6 is as shown in the embodiment 1-3, and the difference from the embodiment 1-3 is that the compound emulsifier-1 is replaced by the compound emulsifier-2, and the content of the effective components in the added compound emulsifier-2 is the same as that in the compound emulsifier-1. The processing steps for examples 4-6 are the same as in example 1.
Examples 7 to 9
The content of each component of the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent in the embodiment 7-9 is as shown in the embodiment 1-3, and the difference from the embodiment 1-3 is that the compound emulsifier-1 is replaced by the compound emulsifier-3, and the content of the effective components in the added compound emulsifier-3 is the same as that in the compound emulsifier-1. The processing steps for examples 7-9 are the same as in example 1.
Examples 10 to 12
The content of each component of the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent in the embodiment 10-12 is as shown in the embodiment 1-3, and the difference from the embodiment 1-3 is that the compound emulsifier-1 is replaced by the compound emulsifier-4, and the content of the effective components in the added compound emulsifier-4 is the same as that in the compound emulsifier-1. The processing steps for examples 10-12 are the same as in example 1.
Examples 13 to 15
The content of each component of the mesosulfuron-methyl and florasulam compound dispersible oil suspending agent in the embodiment 13-15 is as shown in the embodiment 1-3, and the difference from the embodiment 1-3 is that the compound emulsifier-1 is replaced by the compound emulsifier-5, and the content of the effective components in the added compound emulsifier-5 is the same as that in the compound emulsifier-1. The processing steps for examples 13-15 are the same as in example 1.
Comparative example 1
The content of each component of the methyldisulfuron and florasulam compound dispersible oil suspending agent in the comparative example 1 is shown in example 3, and the difference from the example 3 is that the compound emulsifier-1 is replaced by a hydrophilic emulsifier methyl oleate solution, the amount of the effective components in the hydrophilic emulsifier methyl oleate solution is the same as that in the compound emulsifier-1, and the processing operation steps of the comparative example 1 are the same as those in the example 3.
Comparative example 2
The content of each component of the methyldisulfuron and florasulam compounded dispersible oil suspending agent in the comparative example 2 is shown in the example 3, and the difference from the example 2 is that the compounded emulsifier-1 is replaced by the methyl oleate solution of the lipophilic emulsifier, and the amount of the effective component in the methyl oleate solution of the lipophilic emulsifier added is the same as that of the effective component in the compounded emulsifier-1. The procedure of the working procedure of comparative example 2 was the same as in example 3.
Comparative example 3
The Mesosulfuron-methyl and florasulam compound dispersible oil suspension agent disclosed in the Chinese patent with the publication number of CN107156163A in example 1.
Comparative example 4
The weeding composition containing mesosulfuron and florasulam in example 1 in Chinese patent application with publication number CN 107318873B.
Performance test
The mesosulfuron-methyl and the florasulam compounded dispersible oil suspension agent in the examples 1 to 15 and the comparative examples 1 to 4 were respectively extracted, and the performance test was carried out on the mesosulfuron-methyl and the florasulam compounded dispersible oil suspension agent by the following method, and the specific results are shown in table 3.
Suspension percentage: the suspending rate of the mesosulfuron-methyl and florasulam compounded dispersible oil suspending agent is measured by GB/T14825-2006.
Pourability: the test was carried out using the test method of 4.9 in HG/T2467.5-2003.
Persistent foaming: the test is carried out by adopting the test method of GB/T28137-2011.
Emulsibility: taking 0.5mL of the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam, putting the dispersible oil suspending agent into a measuring cylinder with a plug and containing 250mL of standard hard water at the temperature of 30 ℃, and observing the dispersibility of the dispersible oil suspending agent; after shaking up, the emulsifying property is observed, then the mixture is put into a thermostatic bath with the temperature of 30 ℃ for heat preservation for 1h, and the mixture is taken out to be continuously observed for the emulsifying dispersion stability.
Table 3 test results of examples 1 to 15 and comparative examples 1 to 4 of a methyldisulfuron and florasulam compounded dispersible oil suspension agent
As can be seen from Table 3, the emulsibility of the methyldisulfuron and florasulam compound dispersible oil suspension prepared by adding the compound emulsifier of the invention is obviously improved compared with that of the comparative examples 3-4. The suspension rate of the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam reaches more than 90%, the suspension property is qualified, and the residual amount after pouring is below 4mg, so that the requirement of pouring property is met.
From the data of examples 1-15 and comparative examples 1-2, the emulsibility of the mesosulfuron-methyl and florasulam compound dispersible oil suspension prepared by adding the compound emulsifier is better than that of a single hydrophilic emulsifier or lipophilic emulsifier.
From the data of examples 1-15, the emulsifiability of the dispersible oil suspension agent compounded by the mesosulfuron and the florasulam shows a trend of increasing first and then decreasing. The emulsibility of the dispersible oil suspension agent compounded by adding the mesosulfuron and the florasulam corresponding to the compound emulsifier-3 and the compound emulsifier-4 is obviously better. When the addition amount of the compound emulsifier-3 and the compound emulsifier-4 is 3kg, the corresponding mesosulfuron and florasulam compound dispersible oil suspending agent can be automatically dispersed in water, and no oil drop exists on the surface, so that a uniform emulsion is formed.
From the data of examples 1-3, when the amount of the compound emulsifier-2 added is 3, 7 and 10kg, the emulsion formed by shaking and shaking the corresponding mesosulfuron-methyl and florasulam compound dispersible oil suspending agent in water is more uniform, but a small amount of oil drops still appear on the surface.
From the data of examples 4-6, it can be seen that when the amount of the compound emulsifier-2 added reaches 10kg, the corresponding compound dispersible oil suspension of mesosulfuron-methyl and florasulam can form a uniform emulsion after shaking and shaking in water, and no oil drop appears on the surface.
From the data of examples 13-15, it can be seen that when the amount of the compound emulsifier-5 added reaches 10kg, the corresponding compound dispersible oil suspension of mesosulfuron-methyl and florasulam can form a uniform emulsion after shaking and shaking in water, and no oil drop appears on the surface.
Test of field drug effect
1) And (3) test treatment: taking 15g, or 20g of the dispersible oil suspending agent compounded by the mesosulfuron-methyl and the florasulam in the examples 1-15 and the comparative examples 1-3, and diluting with water to 1 mu of spraying amount, wherein the diluting water consumption is 40 kg; the compound dispersible oil suspension agent of the mesosulfuron-methyl and the florasulam in the comparative example 4 adopts the dosage with the effective content of 1 g/mu.
2) The application method comprises the following steps: spraying stems and leaves of wheat in a 3-leaf period and weeds in a 2-4-leaf period, spraying by adopting an indoor crown block type spraying device with adjustable speed, and simulating a conventional field spraying method, wherein a spray head is a fan-shaped spray head, the model is Teejer8002E, the spraying amount is 40 kilograms/mu, the spraying height is 0.5 meter, the spraying amplitude is 0.7 meter, the step speed is 0.224 meter/second, the spraying pressure is 2.0 MPa, and the flow is 697 liters/minute;
3) time and frequency of application: the test shows that the pesticide spraying treatment is carried out in the 3-leaf stage of the wheat for 1 time, and the control effect of each treatment pesticide on gramineous weeds and broadleaf weeds in the wheat field is investigated 30 days after the pesticide application.
Table 4 test results of field efficacy test of the dispersible oil suspension concentrate compounded by mesosulfuron-methyl and florasulam in examples 1 to 15 and comparative examples 1 to 4
As can be seen from the data in Table 4, compared with the prior art, the dispersible oil suspension agent compounded by the mesosulfuron and the florasulam has better weed control effect in the wheat field. The dispersible oil suspending agent compounded by the mesosulfuron and the florasulam in the example 12 has the best effect of controlling weeds in a wheat field, the control effect of gramineous weeds is as high as 97.5%, and the control effect of broadleaf weeds is as high as 98.0%.
From the data of examples 7-12 and comparative examples 1-2, the dispersible oil suspension agent compounded by the mesosulfuron and the florasulam in the examples 7-12 has better control effect on weeds in wheat fields, and the control effect on grassy weeds and broadleaf weeds is higher than that when a hydrophilic emulsifier and a hydrophilic emulsifier are respectively used as emulsifiers.
From the data in table 3 and table 4, it is seen that the emulsification effect of the methyldisulfuron and florasulam compounded dispersible oil suspending agent of examples 7-12 is better, and the corresponding weed control effect on wheat fields is higher.
In conclusion, the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam has obvious influence on the weed control effect of wheat by the emulsibility, and has better weed control effect on wheat when the emulsibility of the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam is improved. Compared with the prior art, the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam has better emulsification effect and better control effect on wheat weeds.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A mesosulfuron-methyl and florasulam compound dispersible oil suspending agent is characterized in that: the composition is prepared from the following raw materials in parts by weight: 2-5% of mesosulfuron-methyl, 0.5-2% of florasulam, 3-10% of compound emulsifier, 10-20% of dispersant, 1-5% of thickener, 1-5% of wetting agent and solvent oil, wherein the balance is up to 100%;
the compound emulsifier is prepared from a hydrophilic emulsifier, a lipophilic emulsifier and methyl oleate, wherein the weight ratio of the hydrophilic emulsifier to the lipophilic emulsifier is 1:3-3.5: 0.5.
2. The mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in claim 1, is characterized in that: the hydrophilic emulsifier is polyoxyethylene sorbitan monooleate, and the lipophilic emulsifier is calcium dodecyl benzene sulfonate.
3. The mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in claim 1, is characterized in that: the weight ratio of the hydrophilic emulsifier to the lipophilic emulsifier is 2:2-3: 1.
4. The mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in claim 1, is characterized in that: the preparation method of the compound emulsifier comprises the following steps:
1) mixing methyl oleate and lipophilic emulsifier and stirring uniformly to obtain a mixture A;
2) and adding the hydrophilic emulsifier into the mixture A, and continuously stirring uniformly to obtain the compound emulsifier.
5. The mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in claim 1, is characterized in that: the solvent oil is vegetable oil.
6. The mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in claim 1, is characterized in that: the yield of the dispersible oil suspending agent compounded by the mesosulfuron and the florasulam is 15-20g per mu, and the water consumption for dilution is 40 kg.
7. The mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in any one of claims 1-6, which is characterized in that: the dispersible oil suspension agent compounded by the mesosulfuron and the florasulam is applied to stems and leaves of wheat in the 3-leaf stage and the 2-4-leaf stage of weeds.
8. A preparation method of the mesosulfuron and florasulam compound dispersible oil suspension agent as claimed in any one of claims 1 to 6, which is characterized in that: the preparation method comprises the following preparation steps:
1) sequentially adding solvent oil, a dispersing agent, a wetting agent and a compound emulsifier, and uniformly stirring to obtain a mixture B;
2) adding mesosulfuron-methyl and florasulam into the mixture B, continuously stirring uniformly, and then putting into a sand mill for grinding to obtain a mixture C;
3) and adding a thickening agent into the mixture C, and continuously stirring until the mixture C is uniform, thus obtaining the dispersible oil suspension agent compounded by the mesosulfuron and the florasulam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010312378.0A CN111328822A (en) | 2020-04-20 | 2020-04-20 | Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010312378.0A CN111328822A (en) | 2020-04-20 | 2020-04-20 | Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof |
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| CN111328822A true CN111328822A (en) | 2020-06-26 |
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| CN202010312378.0A Withdrawn CN111328822A (en) | 2020-04-20 | 2020-04-20 | Mesosulfuron-methyl and florasulam compounded dispersible oil suspension and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102379302A (en) * | 2011-12-15 | 2012-03-21 | 安徽丰乐农化有限责任公司 | Postemergence compound herbicide for wheat |
| CN104186518A (en) * | 2014-08-19 | 2014-12-10 | 青岛清原植保服务有限公司 | Herbicide safener composition |
| CN107156163A (en) * | 2017-07-14 | 2017-09-15 | 安徽海日生物科技有限公司 | A kind of mesosulfuron and florasulam compound dispersible oil-suspending agent and preparation method thereof |
| CN107318873A (en) * | 2017-08-16 | 2017-11-07 | 安徽尚禾沃达生物科技有限公司 | A kind of Herbicidal combinations containing mesosulfuron and florasulam |
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2020
- 2020-04-20 CN CN202010312378.0A patent/CN111328822A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102379302A (en) * | 2011-12-15 | 2012-03-21 | 安徽丰乐农化有限责任公司 | Postemergence compound herbicide for wheat |
| CN104186518A (en) * | 2014-08-19 | 2014-12-10 | 青岛清原植保服务有限公司 | Herbicide safener composition |
| CN107156163A (en) * | 2017-07-14 | 2017-09-15 | 安徽海日生物科技有限公司 | A kind of mesosulfuron and florasulam compound dispersible oil-suspending agent and preparation method thereof |
| CN107318873A (en) * | 2017-08-16 | 2017-11-07 | 安徽尚禾沃达生物科技有限公司 | A kind of Herbicidal combinations containing mesosulfuron and florasulam |
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Application publication date: 20200626 |