Bactericide containing atomic copper and zinc oxide

Abstract

The invention relates to the technical field of pesticide bactericides, and particularly discloses a bactericide containing atomic copper and zinc oxide. Transition metal copper is anchored in defect sites on the surface of nano-zinc oxide in a monatomic form to obtain composite powder, the composite powder and an auxiliary agent are mixed and stirred and then subjected to coarse crushing, fine grinding, spraying and granulation, and the bactericide containing atomic copper and zinc oxide is obtained. The bactericide provided by the invention solves the waste caused by clusters and crystal lattices of copper ions, achieves the effect of supplementing copper and zinc at the same time through disposable use, greatly reduces the cost, saves copper resources, enables the utilization rate of copper to be high, reduces the pollution of heavy metals to the environment, and efficiently prevents and removes insect pests, bacterial diseases and fungal diseases of crops; the bactericidal composition can be applied to most crops, is high in bactericidal speed and lasting in prevention and treatment effect, and can be compounded with various agricultural agents for use.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticide bactericides, and specifically refers to a bactericide containing atomic copper and zinc oxide. Background Art

[0002] As a major agricultural country, the problem of crop pests and diseases in China is one of the main factors restricting agricultural development. Bacterial diseases of crops in China are characterized by a large variety and wide distribution. The annual occurrence area is about 120 million mu times. Among the more than 1,600 kinds of bacteria identified so far, about 300 kinds cause crop diseases. Diseases caused by phytopathogenic bacteria are more than 500 kinds, and about 100 kinds of common, intermittent, and regional plant bacterial diseases break out into disasters. A broad-spectrum, non-resistant, low-toxic, and low-cost bactericide will bring good news for the prevention and control of agricultural bacterial diseases.

[0003] Some long-established agricultural bactericides such as Bordeaux mixture, cuprous oxide, copper hydroxide, and basic copper sulfate can still play a good bactericidal effect after being used for hundreds of years. They are widely used in the prevention and control of diseases of various crops, and there is still no drug resistance phenomenon so far. Since 2009, this type of copper-containing bactericide has always ranked among the top five in the global bactericide sales, known as the fifth largest bactericide in the world, and has become one of the most popular bactericide varieties among global agricultural users. Especially in countries such as the European Union, it is often listed as the first bactericide.

[0004] Traditional copper-containing bactericides have a very low suspension rate and too large particle size. After dilution and mixing, copper clusters and lattices are easily formed. Only the copper atoms on the surface can come into contact and play a role, and most of the copper atoms are wrapped inside and cannot be utilized. The atomic utilization rate of copper is very low, and it is also easy to cause excessive heavy metal pollution when remaining in the soil after use. In recent years, a batch of copper-zinc compound bactericides have been gradually developed, which are all crop protective bactericides formulated with copper sulfate and zinc sulfate as the main raw materials. However, due to the too high local copper ion concentration, exceeding the tolerance threshold of crop cells, spot or other phytotoxicity symptoms are produced. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention provides a bactericide containing atomic copper and zinc oxide. The bactericide of the present invention is an effective alternative to traditional agricultural copper-zinc compound bactericides. The copper atoms in this bactericide have a small enough particle size, solving the waste caused by copper ion clusters and lattices, achieving the effect of supplementing copper and zinc at one time, and improving the prevention and control effect of crop bacterial diseases.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0007] A bactericide containing atomic copper and zinc oxide is prepared from raw materials including the following parts by weight: 40 - 60 parts of compound powder, 1 - 8 parts of dispersant, 2 - 5 parts of wetting agent, 1 - 5 parts of stabilizer, 1 - 3 parts of disintegrant, 0.1 - 5 parts of synergist, 0.1 - 1 part of defoamer, 0.1 - 3 parts of water, and 2 - 10 parts of filler.

[0008] A bactericide containing atomic copper and zinc oxide, and the preparation process of the bactericide containing atomic copper and zinc oxide is as follows:

[0009] S1: Weigh 40 - 60 parts of compound powder, 1 - 8 parts of dispersant, 2 - 5 parts of wetting agent, 1 - 5 parts of stabilizer, 1 - 3 parts of disintegrant, 0.1 - 5 parts of synergist, 0.1 - 1 part of defoamer, 0.1 - 3 parts of water, and 2 - 10 parts of filler according to the parts by weight, then add them into a batching tank, mix and stir evenly to obtain a mixture;

[0010] S2: Add the mixture into a high - speed shearing machine for rough grinding in a shearing kettle, and then add it into a sand mill for fine grinding until the particle size reaches 1 - 5 μm;

[0011] S3: Add it into a pressure - type spray dryer for spraying and granulating to obtain the bactericide.

[0012] As a further scheme of the present invention: The dosage form of the bactericide containing atomic copper and zinc oxide is a dry suspension agent, and the dilution multiple is 1000 - 1200 times.

[0013] As a further scheme of the present invention: The dispersant is one of lignosulfonate, polycarboxylate, naphthalene and alkylnaphthalene formaldehyde condensate sulfonate, and polyoxyethylene ether phosphate.

[0014] As a further scheme of the present invention: The wetting agent is one of methyl coconut alcohol polyoxyethylene ether, sodium lauryl ether sulfate, L64 surfactant, and isobutene maleic anhydride copolymer.

[0015] As a further scheme of the present invention: The stabilizer is one or a combination of glycerol, isopropyl glycol, and polyethylene glycol.

[0016] As a further scheme of the present invention: The disintegrant is one of sodium chloride, ammonium sulfate, urea, and sodium sulfate.

[0017] As a further scheme of the present invention: The synergist is one of Silwet L - 7001, Silwet L - 7220, SilwetL - 7602, Beiyirun EW - 211, Fairland 2408, and Fairland P60.

[0018] As a further solution of the present invention: The defoaming agent is Wacker SE-811 defoaming agent.

[0019] As a further solution of the present invention: The filler is one of kaolin, diatomite, bentonite, talcum powder, and light calcium carbonate.

[0020] As a further solution of the present invention: The composite powder is obtained by anchoring transition metals in the defect sites on the surface of the carrier in the form of single atoms.

[0021] As a further solution of the present invention: The mass ratio of the transition metal to the carrier is 1:20 - 1:250.

[0022] As a further solution of the present invention: The transition metal is copper, and the source is copper acetylacetonate solution, and the carrier is a nano-zinc oxide carrier.

[0023] As a further solution of the present invention: The preparation method of the composite powder includes the following steps:

[0024] A1: Prepare a nano-zinc oxide carrier;

[0025] A2: Anchoring: Add an aqueous solution of 2 - 10% copper acetylacetonate to the nano-zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano-zinc oxide carrier is 1:20 - 1:200. The obtained solution is ultrasonically dispersed for 40 - 80 min under the condition of an ultrasonic dispersion frequency of 80 - 120 kHz. Then, the ultrasonically dispersed mixed solution is stirred and reacted for 24 - 72 h under the condition of a stirring rate of 500 - 1200 r / min. After that, it is heated to boiling, volatilized at high temperature, and the solvent is evaporated to dryness, and then ball milled for 0.5 - 3 h under the condition of a rotation speed of 100 - 800 r / min to obtain a solid powder;

[0026] A3: High-temperature activation treatment: Heat the solid powder in the presence of air at a temperature of 400 - 1000 °C for 2 - 48 h, then cool it to room temperature, and ball mill it for 20 - 60 min under the condition of a rotation speed of 50 - 1000 r / min to obtain the composite powder.

[0027] As a further solution of the present invention: The preparation process of the nano-zinc oxide carrier is as follows:

[0028] B1: Add zinc oxide to deionized water with a weight 5 - 10 times its own weight, and mix and stir evenly at a temperature of 40 - 75 °C to prepare a zinc oxide solution;

[0029] B2: Pass CO gas into the zinc oxide solution, and stir and react simultaneously. Heat it up to 85 - 90 °C and keep it warm for 240 - 450 min, then stop passing CO gas and heating;

[0030] B3: Filter the reacted solution to remove water, dry the resulting product at 400 °C, and then pulverize it to obtain a pulverized product;

[0031] B4: Add the pulverized product to a muffle furnace and calcine it at a temperature of 250 - 600 °C for 3 - 6 h, and then ball-mill it until the particle size of the powder is ≤100 nm to obtain a nano-zinc oxide carrier.

[0032] Advantages of the present invention:

[0033] 1. The bactericide containing atomic copper and zinc oxide of the present invention is prepared by compounding a composite powder and an adjuvant formed by compounding single-atom copper and a nano-zinc oxide carrier. The composite powder is prepared by single-atom technology and nano-technology, and is obtained by anchoring transition metal copper in the defect sites on the surface of the nano-zinc oxide carrier in the form of single atoms. Compared with traditional copper-zinc compound bactericides, the composite powder has a smaller particle size and a higher specific surface area, and can directly contact and destroy the cell wall of bacteria to make them lose the ability to grow and reproduce, endowing the bactericide with good bactericidal performance, solving the waste caused by the clustering and crystal lattice of copper ions, achieving the effect of simultaneously supplementing copper and zinc in one use, providing essential nutrient elements for crops, while greatly reducing costs and saving copper resources, making the utilization rate of copper high, reducing environmental pollution by heavy metals, and efficiently controlling pests, bacterial diseases, and fungal diseases of crops.

[0034] 2. The bactericide containing atomic copper and zinc oxide of the present invention has a wide range of applications, and can be mixed with various agricultural pesticides such as herbicides, insecticides, plant growth regulators, rooting agents, and nematicides, endowing other pesticides with bactericidal effects and improving the bactericidal effects of the pesticides themselves.

[0035] 3. The present invention is applicable to the vast majority of crops, and can be used from the seedling stage to the mature stage of the crops. Sprayed on the crops, it can be evenly dispersed and covered on the surface of the crops at a faster speed, has good adhesion, is resistant to rain erosion, has a fast bactericidal speed and a long-lasting control effect. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0037] Example 1:

[0038] This example is a bactericide containing atomic copper and zinc oxide, and the specific preparation process is as follows:

[0039] S1: Add zinc oxide to deionized water at 5 times its own weight, and under the condition of a temperature of 40 °C, mix and stir evenly to prepare a zinc oxide solution;

[0040] S2: Pass CO gas into the zinc oxide solution, stir and react simultaneously, heat up to 85 °C, keep warm for 240 min, and then stop passing CO gas and heating;

[0041] S3: Filter the reacted solution to remove water, dry the obtained product at a temperature of 400 °C, and then crush it to obtain a crushed product;

[0042] S4: Add the crushed product to a muffle furnace and calcine it at a temperature of 250 °C for 3 h, and then ball mill it until the particle size of the powder is ≤100 nm to obtain a nano-zinc oxide carrier;

[0043] S5: Add an aqueous solution of 2% copper acetylacetonate to the nano-zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano-zinc oxide carrier is 1:20. The obtained solution is ultrasonically dispersed for 40 min under the condition of an ultrasonic dispersion frequency of 80 kHz, and then the ultrasonically dispersed mixed solution is stirred and reacted for 24 h under the condition of a stirring rate of 500 r / min. Then, it is heated to boiling, volatilized at high temperature, the solvent is evaporated to dryness, and ball milled for 0.5 h under the condition of a rotation speed of 100 r / min to obtain a solid powder;

[0044] S6: Heat the solid powder in the presence of air at a temperature of 400 °C for 2 h, then cool it to room temperature, and ball mill it for 20 min under the condition of a rotation speed of 50 r / min to obtain a composite powder;

[0045] S7: Weigh 40 parts of the composite powder, 1 part of lignosulfonate, 2 parts of methyl coconut oil alcohol polyoxyethylene ether, 1 part of glycerol, 1 part of sodium chloride, 0.1 part of Silwet L-7001, 0.1 part of Wacker SE-811 defoamer, 0.1 part of water, and 2 parts of kaolin according to weight, and then add them to a batching tank and mix and stir evenly to obtain a mixture;

[0046] S8: Add the mixture to a high-speed shearer for coarse crushing in a shear kettle, and then add it to a sand mill for fine grinding until the particle size is 1 µm;

[0047] S9: Add it to a pressure spray dryer for spraying and granulating to obtain the fungicide.

[0048] Example 2:

[0049] This example is a fungicide containing atomic copper and zinc oxide, and the specific preparation process is as follows:

[0050] S1: Add zinc oxide to deionized water at 6 times its own weight, and under the condition of a temperature of 45 °C, mix and stir evenly to prepare a zinc oxide solution;

[0051] S2: Pass CO gas into the zinc oxide solution, stir and react simultaneously, heat up to 85 °C, keep warm for 300 min, and then stop passing CO gas and heating;

[0052] S3: Filter the reacted solution to remove water, dry the obtained product at a temperature of 400 °C, and then crush it to obtain a crushed product;

[0053] S4: Add the crushed product to a muffle furnace and calcine it at a temperature of 300 °C for 3.5 h, and then ball mill it until the particle size of the powder is ≤100 nm to obtain a nano-zinc oxide carrier;

[0054] S5: Add an aqueous solution of 3% copper acetylacetonate to the nano-zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano-zinc oxide carrier is 1:100. The obtained solution is ultrasonically dispersed for 50 min under the condition of an ultrasonic dispersion frequency of 90 kHz. Then, the ultrasonically dispersed mixed solution is stirred and reacted for 36 h under the condition of a stirring rate of 600 r / min. Then, it is heated to boiling, volatilized at high temperature, and the solvent is evaporated to dryness. It is ball milled for 1 h under the condition of a rotation speed of 200 r / min to obtain a solid powder;

[0055] S6: Heat the solid powder in the presence of air at a temperature of 600 °C for 12 h, and then cool it to room temperature. Ball mill it for 40 min under the condition of a rotation speed of 200 r / min to obtain a composite powder;

[0056] S7: Weigh 45 parts of the composite powder, 2 parts of polycarboxylate, 3 parts of sodium lauryl ether sulfate, 2 parts of isopropyl glycol, 2 parts of ammonium sulfate, 1 part of Silwet L-7602, 0.2 part of Wacker SE-811 defoamer, 1 part of water, and 4 parts of diatomite by weight, and then add them to a batching tank, mix and stir evenly to obtain a mixture;

[0057] S8: Add the mixture to a high-speed shearer for coarse crushing in a shear kettle, and then add a sand mill for fine grinding until the particle size is 2 μm;

[0058] S9: Add it to a pressure spray dryer for spraying and granulating to obtain the fungicide.

[0059] Example 3:

[0060] This example is a fungicide containing atomic copper and zinc oxide, and the specific preparation process is as follows:

[0061] S1: Add zinc oxide to deionized water at 7 times its own weight, and under the condition of a temperature of 50 °C, mix and stir evenly to prepare a zinc oxide solution;

[0062] S2: Introduce CO gas into the zinc oxide solution, stir and react simultaneously, heat up to 90 °C, keep warm for 350 min, and then stop introducing CO gas and heating.

[0063] S3: Filter the reacted solution to remove water, dry the obtained product at 400 °C, and then crush it to obtain a crushed product.

[0064] S4: Add the crushed product to a muffle furnace and calcine it at 400 °C for 4 h, and then ball mill it until the powder particle size is ≤100 nm to obtain a nano-zinc oxide carrier.

[0065] S5: Add an aqueous solution of 6% copper acetylacetonate to the nano-zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano-zinc oxide carrier is 1:200. The obtained solution is ultrasonically dispersed for 60 min under the condition of an ultrasonic dispersion frequency of 100 kHz. Then, the ultrasonically dispersed mixed solution is stirred and reacted for 36 h under the condition of a stirring rate of 800 r / min. Then, it is heated to boiling, volatilized at high temperature, and the solvent is evaporated to dryness. It is ball milled for 2 h under the condition of a rotation speed of 400 r / min to obtain a solid powder.

[0066] S6: Heat the solid powder in the presence of air at 600 °C for 24 h, then cool it to room temperature, and ball mill it for 40 min under the condition of a rotation speed of 600 r / min to obtain a composite powder.

[0067] S7: Weigh 50 parts of the composite powder, 5 parts of naphthalene and alkylnaphthalene formaldehyde condensate sulfonate, 3 parts of sodium lauryl ether sulfate, 3 parts of polyethylene glycol, 2 parts of urea, 0.3 part of Beiyirun EW-211, 0.6 part of Wacker SE-811 defoamer, 1.5 parts of water, and 6 parts of talcum powder by weight, and then add them to a batching tank and mix and stir evenly to obtain a mixture.

[0068] S8: Add the mixture to a high-speed shearer for rough crushing in a shear kettle, and then add a sand mill for fine grinding until the particle size is 3 μm.

[0069] S9: Add it to a pressure spray dryer for spraying and granulating to obtain the fungicide.

[0070] Example 4:

[0071] This example is a fungicide containing atomic copper and zinc oxide, and the specific preparation process is as follows:

[0072] S1: Add zinc oxide to 8 times its own weight of deionized water, and mix and stir evenly at 60 °C to prepare a zinc oxide solution.

[0073] S2: Introduce CO gas into the zinc oxide solution, stir and react simultaneously, heat up to 85 °C, keep warm for 400 min, and then stop introducing CO gas and heating.

[0074] S3: Filter the reacted solution, dry the obtained product after removing water at 400 °C, and then pulverize it to obtain a pulverized product.

[0075] S4: Add the pulverized product to a muffle furnace and calcine it at 500 °C for 5 h, and then ball mill it until the powder particle size is ≤100 nm to obtain a nano zinc oxide carrier.

[0076] S5: Add an aqueous solution of 8% copper acetylacetonate to the nano zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano zinc oxide carrier is 1:100. The obtained solution is ultrasonically dispersed for 70 min under the condition of an ultrasonic dispersion frequency of 110 kHz. Then, the ultrasonically dispersed mixed solution is stirred and reacted for 48 h under the condition of a stirring rate of 1000 r / min. Then, it is heated to boiling, volatilized at high temperature, and the solvent is evaporated to dryness. It is ball milled for 2.5 h under the condition of a rotation speed of 600 r / min to obtain a solid powder.

[0077] S6: Heat the solid powder in the presence of air at 800 °C for 36 h, and then cool it to room temperature. Ball mill it for 50 min under the condition of a rotation speed of 800 r / min to obtain a composite powder.

[0078] S7: Weigh 55 parts of the composite powder, 6 parts of polyoxyethylene ether phosphate, 4 parts of isobutene maleic anhydride copolymer, 4 parts of isopropyl glycol, 2.5 parts of sodium sulfate, 4 parts of Fairland 2408, 0.8 part of Wacker SE-811 defoamer, 2 parts of water, and 8 parts of bentonite according to weight. Then add them to a batching tank and mix and stir evenly to obtain a mixture.

[0079] S8: Add the mixture to a high-speed shearer for coarse pulverization in a shear kettle, and then add it to a sand mill for fine grinding until the particle size is 4 μm.

[0080] S9: Add it to a pressure spray dryer for spraying and granulating to obtain the fungicide.

[0081] Example 5:

[0082] This example is a fungicide containing atomic copper and zinc oxide, and the specific preparation process is as follows:

[0083] S1: Add zinc oxide to 10 times its own weight of deionized water, and mix and stir evenly at 75 °C to prepare a zinc oxide solution.

[0084] S2: Introduce CO gas into the zinc oxide solution, stir and react simultaneously, heat up to 90 °C, keep warm for 450 min, and then stop introducing CO gas and heating.

[0085] S3: Filter the reacted solution to remove water, dry the obtained product at 400 °C, and then crush it to obtain a crushed product.

[0086] S4: Add the crushed product to a muffle furnace and calcine it at 600 °C for 6 h, and then ball mill it until the powder particle size is ≤100 nm to obtain a nano-zinc oxide carrier.

[0087] S5: Add an aqueous solution of 10% copper acetylacetonate to the nano-zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano-zinc oxide carrier is 1:200. The obtained solution is ultrasonically dispersed for 80 min under the condition of an ultrasonic dispersion frequency of 120 kHz. Then, the ultrasonically dispersed mixed solution is stirred and reacted for 72 h under the condition of a stirring rate of 1200 r / min. After that, it is heated to boiling, volatilized at high temperature, and the solvent is evaporated to dryness, and then ball milled for 3 h under the condition of a rotation speed of 800 r / min to obtain a solid powder.

[0088] S6: Heat the solid powder in the presence of air at 1000 °C for 48 h, and then cool it to room temperature, and ball mill it for 60 min under the condition of a rotation speed of 1000 r / min to obtain a composite powder.

[0089] S7: Weigh 60 parts of the composite powder, 8 parts of lignosulfonate, 5 parts of L64 surfactant, 5 parts of the compound of glycerol and isopropyl glycol, 3 parts of sodium sulfate, 5 parts of Fairland P60, 1 part of Wacker SE-811 defoamer, 3 parts, and 10 parts of kaolin according to weight, and then add them to a batching tank, mix and stir evenly to obtain a mixture.

[0090] S8: Add the mixture to a high-speed shearing machine for rough crushing in a shearing kettle, and then add a sand mill for fine grinding until the particle size reaches 5 μm.

[0091] S9: Add it to a pressure spray dryer for spraying and granulating to obtain the fungicide.

[0092] Comparative Example 1:

[0093] The difference between Comparative Example 1 and Example 5 is that copper hydroxide is used instead of the composite powder, and the other steps are the same.

[0094] Comparative Example 2:

[0095] The difference between Comparative Example 2 and Example 5 is that zinc oxide is used instead of the composite powder, and the other steps are the same.

[0096] Comparative Example 3:

[0097] This comparative example is a single-atom copper preparation in Example 1 of Patent Application No. 202110353113.X.

[0098] The fungicides in Examples 1-5 and Comparative Examples 1-3 were subjected to field efficacy tests. They were diluted 1000 times and evenly sprayed on crops. Detection tests were carried out on the disease control targets of the crops and the bactericidal rate of the crops was detected. The test results are shown in the following table:

[0099]

[0100] Referring to the data in the above table, by comparing Examples 1-5 with Comparative Examples 1-3, it can be known that the fungicide in the present invention has more excellent disease prevention and antibacterial abilities. The composite powder particles in the fungicide are small enough, which solves the waste caused by the clustering and lattice of copper ions, achieving the effect of supplementing copper and zinc at one time. The bactericidal rate is high and persistent, and it can effectively control crop diseases.

[0101] The fungicides in Examples 1-5 were used in combination with other agricultural pesticides. The mixing effects are shown in the following table:

[0102]

[0103] Referring to the data in the above table, it can be known that the fungicide in the present invention has a wide range of applications. It is feasible to mix and use it with various agricultural pesticides such as herbicides, insecticides, plant growth regulators, rooting agents, and nematicides, endowing other pesticides with bactericidal effects and improving the bactericidal effects of the pesticides themselves, thereby effectively promoting crop growth.

[0104] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0105] The above content is only an example and explanation of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A fungicide containing atomic copper and zinc oxide, characterized in that: The fungicide containing atomic copper and zinc oxide is prepared by the following steps: S1: Weigh 40 - 60 parts of composite powder, 1 - 8 parts of dispersant, 2 - 5 parts of wetting agent, 1 - 5 parts of stabilizer, 1 - 3 parts of disintegrant, 0.1 - 5 parts of synergist, 0.1 - 1 part of defoamer, 0.1 - 3 parts of water, and 2 - 10 parts of filler by weight, then add them into a batching tank, mix and stir evenly to obtain a mixture; S2: Add the mixture into a high - speed shearer for coarse crushing in a shear kettle, and then add it into a sand mill for fine grinding until the particle size reaches 1 - 5 μm; S3: Add it into a pressure - type spray dryer for spraying and granulating to obtain the fungicide.

2. The fungicide containing atomic copper and zinc oxide according to claim 1, wherein: The dosage form of the fungicide containing atomic copper and zinc oxide is a dry suspension, and the dilution multiple is 1000 - 1200 times.

3. A fungicide containing atomic copper and zinc oxide according to claim 1, characterized in that: The dispersant is one of lignosulfonate, polycarboxylate, naphthalene and alkylnaphthalene formaldehyde condensate sulfonate, and polyoxyethylene ether phosphate; the wetting agent is one of methyl coconut alcohol polyoxyethylene ether, sodium lauryl ether sulfate, L64 surfactant, and isobutene maleic anhydride copolymer; the stabilizer is one or a combination of glycerol, isopropyl glycol, and polyethylene glycol.

4. A fungicide containing atomic copper and zinc oxide according to claim 1, characterized in that: The disintegrant is one of sodium chloride, ammonium sulfate, urea, and sodium sulfate; the synergist is one of Silwet L - 7001, Silwet L - 7220, Silwet L - 7602, Beiyirun EW - 211, Fairland 2408, and Fairland P60; the defoamer is Wacker SE - 811 defoamer; the filler is one of kaolin, diatomite, bentonite, talc powder, and light calcium carbonate.

5. A fungicide containing atomic copper and zinc oxide according to claim 1, characterized in that: The composite powder is obtained by anchoring transition metals in the defect sites on the surface of the carrier in the form of single atoms.

6. The fungicide containing atomic copper and zinc oxide according to claim 5, characterized in that: The mass ratio of the transition metal to the carrier is 1:20 - 1:

250.

7. A fungicide containing atomic copper and zinc oxide according to claim 5, characterized in that: The transition metal is copper, and the source is copper acetylacetonate solution; the carrier is a nano - zinc oxide carrier.

8. A fungicide containing atomic copper and zinc oxide according to claim 1, characterized in that: The preparation method of the composite powder includes the following steps: A1: Prepare a nano - zinc oxide carrier; A2: Anchoring: Add an aqueous solution of 2 - 10% copper acetylacetonate into the nano - zinc oxide carrier, where the mass ratio of the aqueous solution of copper acetylacetonate to the nano - zinc oxide carrier is 1:20 - 1:

200. The obtained solution is ultrasonically dispersed for 40 - 80 min under the condition of an ultrasonic dispersion frequency of 80 - 120 kHz, and then the ultrasonically dispersed mixed solution is stirred and reacted for 24 - 72 h under the condition of a stirring rate of 500 - 1200 r / min. Then, it is heated to boiling, volatilized at high temperature, and the solvent is evaporated to dryness, and ball - milled for 0.5 - 3 h under the condition of a rotation speed of 100 - 800 r / min to obtain a solid powder; A3: High - temperature activation treatment: Heat the solid powder in the presence of air at a temperature of 400 - 1000 °C for 2 - 48 h, then cool it to room temperature, and ball - mill it for 20 - 60 min under the condition of a rotation speed of 50 - 1000 r / min to obtain the composite powder.

9. A fungicide containing atomic copper and zinc oxide according to claim 7, characterized in that: The preparation process of the nano - zinc oxide carrier is as follows: B1: Add zinc oxide into deionized water with a weight 5 - 10 times that of the zinc oxide itself, and under the condition of a temperature of 40 - 75 °C, mix and stir evenly to prepare a zinc oxide solution; B2: Pass CO gas into the zinc oxide solution, stir and react simultaneously, heat up to 85 - 90 °C, keep warm for 240 - 450 min, and then stop passing CO gas and heating; B3: Filter the solution after the reaction to remove water, dry the obtained product at a temperature of 400 °C, and then crush it to obtain a crushed product; B4: Add the crushed product into a muffle furnace and calcine it at a temperature of 250 - 600 °C for 3 - 6 h, and then ball mill it until the particle size of the powder is ≤100 nm to obtain a nano - zinc oxide carrier.

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