CN110839647B - Bactericidal composition containing pyraclostrobin and metiram and preparation method thereof - Google Patents
Bactericidal composition containing pyraclostrobin and metiram and preparation method thereof Download PDFInfo
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- CN110839647B CN110839647B CN201911018997.2A CN201911018997A CN110839647B CN 110839647 B CN110839647 B CN 110839647B CN 201911018997 A CN201911018997 A CN 201911018997A CN 110839647 B CN110839647 B CN 110839647B
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- metiram
- pyraclostrobin
- bactericidal composition
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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
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/24—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing the groups, or; Thio analogues thereof
-
- 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
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/12—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring
- A01N47/14—Di-thio analogues thereof
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- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
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Abstract
The embodiment of the invention discloses a bactericidal composition containing pyraclostrobin and metiram and a preparation method thereof, wherein the bactericidal composition comprises the following raw materials in percentage by mass: 3-8% of pyraclostrobin, 50-60% of metiram, 10-30% of dispersing agent, 1-5% of wetting agent, 0.5-3% of pH value regulator, 0.5-5% of disintegration aid, 0.05-0.3% of defoaming agent and 0-20% of filler. The method for preparing the bactericidal composition comprises the following steps: dissolving the dispersing agent, the wetting agent, the pH value regulator and the disintegration aid in water according to a proportion to form a mixed solution; and continuously adding pyraclostrobin, metiram and filler into the mixed solution, homogenizing and dispersing to form mixed slurry. The bactericidal composition provided by the embodiment of the invention comprises two effective components of pyraclostrobin and metiram, which have different bactericidal mechanisms, has protection and treatment effects, can effectively prevent and treat diseases caused by fungi such as basidiomycetes and ascomycetes, and is safer to non-target organisms and environment.
Description
Technical Field
The embodiment of the invention relates to the technical field of pesticides, and particularly relates to a bactericidal composition containing pyraclostrobin and metiram and a preparation method thereof.
Background
Pyraclostrobin (pyraclosterobin), also known as Pyraclostrobin, is a broad-spectrum methyl methacrylate bactericide with pyrazole structure, which is discovered in 1993 by Pasteur Germany. It can prevent and cure plant diseases caused by almost all kinds of fungal pathogens of ascomycetes, basidiomycetes, deuteromycetes and oomycetes, etc., and is a hormone-type bactericide which can make crops absorb more nitrogen and promote the growth of crops.
Metiram, a protective fungicide, has good control effect on various diseases caused by oomycetes fungi. Because the bactericide has wide sterilization range and is not easy to generate resistance, the prevention and treatment effect is obviously superior to that of other similar bactericides, and the bactericide is a substitute product of other protective bactericides at present. The bactericidal composition is mainly used for preventing and treating vegetable downy mildew, anthracnose, brown spot and the like.
At present, the pyraclostrobin and metiram mixed water dispersible granule used has the defects of low suspension rate of effective ingredients and poor heat storage stability.
Disclosure of Invention
Therefore, the embodiment of the invention provides a bactericidal composition containing pyraclostrobin and metiram and a preparation method thereof, and aims to solve the problems of low suspension rate of effective components and poor heat storage stability of water dispersible granules in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the bactericidal composition containing pyraclostrobin and metiram comprises the following raw materials in percentage by mass: 3-8% of pyraclostrobin, 50-60% of metiram, 10-30% of dispersing agent, 1-5% of wetting agent, 0.5-3% of pH value regulator, 0.5-5% of disintegration aid, 0.05-0.3% of defoaming agent and 0-20% of filler.
Preferably, the bactericidal composition comprises the following raw materials in percentage by mass: 4-6% of pyraclostrobin, 52-58% of metiram, 15-25% of dispersing agent, 2-4% of wetting agent, 1-2% of pH value regulator, 1-4% of disintegration aid, 0.1-0.2% of defoaming agent and 3-18% of filler.
Preferably, the wetting agent is one or more of a sulfate wetting agent YUS-SXC, L-WET/P, Terwet1004, a sulfate wetting agent YUS-TXC, an alkyl naphthalene sulfonate anion wetting agent Morwet EFW and sodium dodecyl sulfate.
Preferably, the dispersant is a polycarboxylate dispersant, a lignosulfonate dispersant or an alkyl naphthalene sulfonate formaldehyde condensate;
the polycarboxylate dispersant is D518, Tersperse2700, YUS-WG7 or D800;
the lignosulfonate dispersant is Reax 910, Reax 907, Reax AG, Ultrazine NA or Ulfoxane 3A;
the alkyl naphthalene sulfonate formaldehyde condensate is Morwet D-425.
Preferably, the pH regulator is ammonium sulfate and/or citric acid.
Preferably, the disintegration aid is one or more of anhydrous sodium sulphate, potassium sulphate and urea.
Preferably, the filler is one or more of calcined kaolin, light calcium carbonate, corn starch, white carbon black, inert clay and sodium methylene dinaphthalene sulfonate.
The embodiment of the invention also provides a preparation method of the bactericidal composition containing pyraclostrobin and metiram, which comprises the following steps:
dissolving the dispersing agent, the wetting agent, the pH value regulator and the disintegration aid in water according to a proportion to form a mixed solution;
adding the pyraclostrobin, the metiram and the filler into the mixed solution for homogeneous dispersion to obtain a homogeneous dispersion liquid;
and (3) crushing the materials in the homogeneous dispersion liquid to obtain a particle size D98 of less than or equal to 5 microns, and then spraying and drying the mixed solution to obtain the bactericidal composition.
Preferably, the temperature of the spray drying is 150 ℃.
Preferably, in the homogenizing and dispersing process, a homogenizer is adopted for homogenizing and dispersing for 30min, and the rotating speed of the homogenizer is 1470 r/min.
The embodiment of the invention has the following advantages:
the bactericidal composition provided by the embodiment of the invention comprises two effective components of pyraclostrobin and metiram, which have different bactericidal mechanisms, has protection and treatment effects, can effectively prevent and treat diseases caused by fungi such as basidiomycetes and ascomycetes, and is safer to non-target organisms and environment.
According to the bactericidal composition provided by the embodiment of the invention, through the screening of the dispersing agent and the wetting agent, the heat resistance and the suspension rate of the raw pesticide are improved, the heat resistance of the raw pesticide is improved, and the decomposition rate of the raw pesticide is reduced.
The bactericidal composition provided by the embodiment of the invention is added with the acidic pH regulator to regulate the pH value of the product, so that the heat storage decomposition rate of the metiram is reduced.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples 1 to 5
Table 1 shows the bactericidal compositions containing pyraclostrobin and metiram of examples 1 to 5 of the present invention and the bactericidal compositions of comparative examples 1 to 3. Of these, comparative examples 1 to 3 are conventional germicidal compositions.
TABLE 1
Wherein the polycarboxylate dispersant D518 is selected from Dow chemical (China) investment limited, Tersperse2700 is selected from Hensman functional products department, YUS-WG7 is selected from bamboo grease Kabushiki Kaisha, and D800 is selected from Beijing Guangyuan agricultural chemical Limited liability company; the lignosulfonate dispersants Reax 910, Reax 907 and Reax AG are selected from Maidwei Wei Ke (China) investment Limited, Ultrazine NA and Uloxane 3A are selected from Borgium International trade (Shanghai) Limited; the alkyl naphthalene sulfonate formaldehyde condensate Morwet D-425 is selected from Nanjing Jiecun technologies, Inc.
Example 6
The method of preparing the germicidal composition of example 1, example 2, example 3, example 4 or example 5 includes the steps of:
1. according to the percentage proportion in the embodiment, the dispersing agent, the wetting agent, the pH value regulator and the disintegration aid are respectively added into water to be dissolved to form a mixed solution;
2. adding pyraclostrobin, metiram and filler into the mixed solution, and homogenizing and dispersing for 30min by using a homogenizer at the rotating speed of 1470 r/min;
3. grinding the uniformly dispersed materials by using a colloid mill until the particle size D98 of the materials is less than or equal to 5 microns; in the step, materials in the mixed solution are ground by a wet method, and then spray-dried, when the slurry is prepared, the water adding amount is strictly controlled, and too much water is added, so that the water content of the bactericidal composition containing pyraclostrobin and metiram during spray-drying is too high, the energy consumption is increased, and too little water is added, so that the viscosity of the slurry is too high, and the fluidity is poor, thereby influencing the spray efficiency;
4. spray drying the ground slurry at 150 ℃ by using a pressure type spray dryer to obtain particles, wherein the moisture content of the particles is less than or equal to 3%, and the particles are the bactericidal composition containing pyraclostrobin and metiram in the embodiment of the invention; in the step, the drying temperature is controlled at 150 ℃, the temperature is too low, the water content in the sterilization composition is too high, the stability is poor, and the index of the sample with too high temperature is poor.
In the embodiment of the invention, certain defoaming agents are respectively added in the steps 1, 2 and 3 for defoaming.
Comparative example 1
The comparative example of the present invention is different from example 2 in that a dispersant is used and the preparation method is identical to example 2.
Comparative example 2
The comparative example of the present invention is different from example 2 in that the dispersant and the wetting agent are different from each other, and the preparation method is the same as example 2.
Comparative example 3
The comparative example of the present invention is different from example 2 in that a lignin dispersant is used and no pH adjustor is added, and the preparation method is identical to example 2.
Table 2 shows the properties of the bactericidal compositions of the examples of the invention and comparative examples
TABLE 2
As can be seen from table 2, the bactericidal composition containing pyraclostrobin and metiram in the embodiment of the present invention has the optimal values in various performances.
Test example 1
As shown in Table 3, the effect of the fungicidal composition prepared in example 2 on various indexes at different spraying temperatures
TABLE 3
As can be seen from table 3, the fungicidal compositions according to the examples of the present invention had the optimum values of the suspension percentage, the heat-storage decomposition percentage, the disintegration time, and the like at a spray temperature of 150 ℃.
Test example 2
Table 4 shows comparison data of various indexes of the bactericidal composition containing pyraclostrobin and metiram of example 2 of the present invention and petasite produced by basf (china) or similar products produced in a certain country.
TABLE 4
As can be seen from Table 4, compared with the existing product, the bactericidal composition containing pyraclostrobin and metiram provided by the embodiment of the invention has the advantages of higher suspension rate, smaller particle size and lower heat storage decomposition rate.
In summary, the bactericidal composition of the present invention provides the best effect to the bactericidal composition, regardless of the constituent components and the ratio of the components, and the improvement of the method for preparing the bactericidal composition.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (4)
1. The bactericidal composition containing pyraclostrobin and metiram is characterized by comprising the following raw materials in percentage by mass: 3-8% of pyraclostrobin, 50-60% of metiram, 23-30% of dispersing agent, 1-5% of wetting agent, 0.5-3% of pH value regulator, 0.5-5% of disintegration aid, 0.05-0.3% of defoaming agent and 0-20% of filler;
wherein the wetting agent is YUS-SXC or L-WET/P;
the dispersant is polycarboxylate dispersant and lignosulfonate dispersant;
the polycarboxylate dispersant is Tersperse 2700;
the lignosulfonate dispersant is Reax 910 or Reax AG;
the pH value regulator is citric acid;
the disintegration aid is one or more of anhydrous sodium sulphate and potassium sulphate;
the preparation method of the bactericidal composition containing pyraclostrobin and metiram comprises the following steps:
dissolving the dispersing agent, the wetting agent, the pH value regulator and the disintegration aid in water according to a proportion to form a mixed solution;
adding the pyraclostrobin, the metiram and the filler into the mixed solution for homogeneous dispersion to obtain a homogeneous dispersion liquid;
and (3) crushing the materials in the homogeneous dispersion liquid to a particle size D98 of less than or equal to 5 microns, and then spray-drying the mixed solution at the temperature of 150 ℃ to obtain the bactericidal composition.
2. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1, wherein the bactericidal composition comprises the following raw materials in percentage by mass: 4-6% of pyraclostrobin, 52-58% of metiram, 23-25% of dispersing agent, 2-4% of wetting agent, 1-2% of pH value regulator, 1-4% of disintegration aid, 0.1-0.2% of defoaming agent and 3-18% of filler.
3. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1, wherein the filler is one or more of calcined kaolin, light calcium carbonate, corn starch, white carbon black, inert white clay and sodium methylene dinaphthalenesulfonate.
4. The pyraclostrobin-thioneb bactericidal composition as claimed in claim 1, wherein a homogenizer is adopted for homogenization and dispersion for 30min in the homogenization and dispersion process, and the rotating speed of the homogenizer is 1470 r/min.
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| CN112219855B (en) * | 2020-10-28 | 2021-11-16 | 文水县是大高分子材料有限公司 | Pyraclostrobin-cymoxanil dry suspending agent and preparation method thereof |
| CN116058367B (en) * | 2023-02-08 | 2023-09-08 | 惠州市银农科技股份有限公司 | Nanometer dry suspending agent containing pyraclostrobin and metiram and preparation method thereof |
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| SG10201602047QA (en) * | 2009-04-24 | 2016-05-30 | Iceutica Pty Ltd | Method for the production of commercial nanoparticle and microparticle powders |
| CN106305729A (en) * | 2016-08-22 | 2017-01-11 | 江苏丰山集团股份有限公司 | Quizalofop-p-ethyl containing water dispersible granule and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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