阅读说明：本技术 一种含吡唑醚菌酯和代森联的杀菌组合物及其制备方法 (Bactericidal composition containing pyraclostrobin and metiram and preparation method thereof ) 是由 谭葵 韦沙迪 陈玉清 莫俊锐 王爱臣 廖联安 于 2019-10-24 设计创作，主要内容包括：本发明实施例公开了一种含吡唑醚菌酯和代森联的杀菌组合物及其制备方法,所述杀菌组合物包括以下质量百分含量的原料：吡唑醚菌酯3～8％、代森联50～60％、分散剂10～30％、润湿剂1～5％、pH值调节剂0.5～3％、助崩剂0.5～5％、消泡剂0.05～0.3％、填料0～20％。制备杀菌组合物的方法包括：按照比例将所述分散剂、润湿剂、pH值调节剂、助崩剂溶于水中形成混合溶液；在混合液中继续加入吡唑醚菌酯、代森联和填料均质分散形成混合浆料。本发明实施例的杀菌组合物包括吡唑醚菌酯和代森联这两种具有不同杀菌机理的有效成分,兼有保护和治疗作用,可有效防治担子菌、子囊菌等真菌引起的病害,并且对非靶标生物和环境更安全。(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.)

1. A bactericidal composition containing pyraclostrobin and metiram, which is characterized in that,

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.

2. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1,

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.

3. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1,

the wetting agent is one or more of a sulfate wetting agent YUS-SXC, an L-WET/P, Terwet1004, a sulfate wetting agent YUS-TXC, an alkyl naphthalene sulfonate anion wetting agent Morwet EFW and sodium dodecyl sulfate.

4. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1,

the dispersant is polycarboxylate dispersant, lignosulfonate dispersant or 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.

5. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1,

the pH value regulator is ammonium sulfate and/or citric acid.

6. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1,

the disintegration aid is one or more of anhydrous sodium sulphate, potassium sulfate and urea.

7. The bactericidal composition containing pyraclostrobin and metiram as claimed in claim 1,

the filler is one or more of calcined kaolin, light calcium carbonate, corn starch, white carbon black, inert clay and sodium methylene dinaphthalene sulfonate.

8. A method for preparing the pyraclostrobin-containing and metiram-containing bactericidal composition of claim 1, comprising:

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.

9. The method of claim 8,

the temperature of the spray drying was 150 ℃.

10. The method of claim 8,

in the process of homogenizing and dispersing, a homogenizer is adopted for homogenizing and dispersing for 30min, and the rotating speed of the homogenizer is 1470 r/min.

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.