Sulfoxaflor-containing pesticide suspending agent and preparation method thereof

Abstract

The invention discloses a sulfoxaflor-containing pesticide suspending agent and a preparation method thereof, and belongs to the technical field of pesticide preparation processing. The invention provides a sulfoxaflor pesticide suspending agent which is prepared from the following components in percentage by mass: 10%-30% of sulfoxaflor, 10%-30% of a second active ingredient, 1%-15% of a performance improver, 1%-10% of a wetting agent, 1%-10% of a dispersing agent, 0.1%-3% of a suspending aid, 2%-10% of an anti-freezing agent, 0.1%-0.6% of a defoaming agent, 0.05%-0.6% of a preservative and the balance of deionized water. The pesticide suspending agent disclosed by the invention has good high-temperature-resistant storage stability, and is particularly suitable for long-time marine transportation of export preparation products.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide preparation processing, and particularly relates to a sulfoxaflor-containing pesticide suspension and a preparation method thereof. Background Art

[0002] Sulfoxaflor is a pesticide developed by Dow Chemical in the United States. It acts on the unique binding site in the nicotinic acetylcholine receptor (nAChR) to exert its insecticidal function. It can be absorbed through leaves, stems and roots and enter the plant body. Sulfoxaflor is suitable for the control of all piercing-sucking mouthparts pests such as cotton blind bugs, aphids, whiteflies, planthoppers and scale insects; it is highly efficient, fast and has a long lasting effect. It can effectively control sap-sucking pests that are resistant to nicotinoids, pyrethroids, organophosphorus and carbamate pesticides. It has been recognized by the Insecticide Resistance Action Committee (IRAC) as the only Group 4C new active ingredient. It has low toxicity to non-target arthropods, is green and harmless, has no reproductive toxicity, no mutagenic effect, no teratogenic effect, no carcinogenic effect, and no neurotoxic effect. It can be quickly decomposed by microorganisms in the soil without residue, and will not pollute groundwater and surface water. The level of existence in the air is very low and will not accumulate in animal fat tissue. It is the preferred agent for integrated pest control. It is the only pesticide in the history of the United States that has not been officially registered or approved for use.

[0003] Sulfoxaflor can kill target pests by direct contact. It has stomach poison, contact killing and permeability. When applied on the front of plant leaves, it can penetrate to the back of plant leaves and kill target pests. Sulfoxaflor has systemic conductivity and can be conducted from bottom to top through the xylem in the plant body to the new tissue leaves. Therefore, the organic combination of various adjuvants in the formulation of sulfoxaflor suspension can improve its wetting and dispersibility, permeability, adhesion and other preparation properties during use, thereby significantly improving its liquid utilization rate during application and killing target pests more effectively.

[0004] When pesticide suspension products are exported to African and American countries, they often have to go through a 1-2 month sea freight period. During the journey, they may need to experience a high temperature of about 65°C for a long time, which is a serious test for the quality of pesticide suspension products. Pesticide suspension preparations prepared by conventional methods often have unsatisfactory high temperature stability (caking, stratification, reduced suspension rate, etc.).

[0005] We know that phenyl silicone oils of high phenyl silicone oils have high heat stability (Synthesis of Hydroxyl-Terminated Dimethyl-Diphenylsiloxane Oligomers, Silicone Materials, 2018, 32 (S1), 586), and the application of phenyl silicone oils of high phenyl silicone oils in combination with certain additives can significantly improve the thermal stability of the system (An emulsifier for improving the high temperature stability and low temperature stability of cosmetics and its use, CN202210309125.7). After a large number of experimental screenings, we also found that phenyl silicone oils of high phenyl silicone oils, through W / O emulsifiers and preferred diluents, can be used in pesticide suspension formulation systems to effectively improve the high temperature resistance of the formulation, and at the same time can give the suspension liquid excellent adhesion properties. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide a pesticide suspension containing sulfoxaflor and a preparation method thereof which has excellent high temperature resistance, stable quality (suitable for export to Africa and America), is environmentally friendly, has high safety, has higher bioavailability, and has better and longer-lasting control effects.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pesticide suspension concentrate of sulfoxaflor, which is composed, by mass content, of 10% to 30% of sulfoxaflor, 10% to 30% of a second active ingredient, 1% to 15% of a performance improver, 1% to 10% of a wetting agent, 1% to 10% of a dispersant, 0.1% to 3% of a suspending agent, 2% to 10% of an antifreeze agent, 0.1% to 0.6% of a defoamer, 0.05% to 0.6% of a preservative and deionized water to make up to 100%.

[0008] The second active ingredient is selected from at least one of pyriproxyfen, ethyl spinosad, spinosad, bromofenac, fluazifop, flutolane, cyantraniliprole, bicyclam, flupyralid, flutolane, chlorantraniliprole, thiamethoxam, cyprodinil, flonicamid, flonicamid, cyclobromofenac, flubendiamide, acetamiprid, spirotetramat, bifenthrin, avermectin, avermectin benzoate and highly effective chlorflucythrinate.

[0009] The performance improver is prepared by mixing 10% to 20% of phenyl silicone additive, 20% to 40% of diluent and 40% to 70% of emulsifier based on 100% of total weight, and homogenizing and high shearing (shearing rate at room temperature is 8000 to 10000 rpm) for 20 to 30 minutes.

[0010] The phenyl silicone auxiliary agent is selected from at least one of terminal hydroxyl polymethylphenyl silicone oil, methylphenyl hydroxy silicone oil and methylphenyl vinyl silicone oil.

[0011] The diluent is selected from at least one of dimethyl sulfoxide, propylene glycol, N,N-dimethylacetamide and methyl oleate.

[0012] The emulsifier is selected from a combination of W / O (water-in-oil) emulsifier and O / W (oil-in-water) emulsifier, and the W / O emulsifier is selected from at least one of sorbitan trioleate, sorbitan anhydride sesquioleate, and polyoxyethylene dioleate. The O / W emulsifier is selected from at least one of isomeric decanol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether, castor oil polyoxyethylene ether, and C12-14 secondary alcohol polyoxyethylene ether.

[0013] The wetting agent is one or a combination of hydroxy polyethylene oxide block copolymer, a high molecular graft copolymer with a molecular weight of 20,000 to 30,000, isopropyl naphthalene sulfonate, and polystyrene polyoxyethylene ether.

[0014] The dispersant is one or a combination of Morwet D-360, polycarboxylates, sodium salt of alkylnaphthalenesulfonic acid condensation polymer, and alkylnaphthalenesulfonic acid salt condensation polymer surfactants.

[0015] The suspending agent is one or a combination of xanthan gum, aluminum magnesium silicate, fumed silica and bentonite.

[0016] The antifreeze agent is one or a combination of propylene glycol, glycerol and urea.

[0017] The defoaming agent is one or a combination of polyalkylsilicon ethylene oxide, mineral oil and alcohol.

[0018] The mildew inhibitor is one or a combination of sodium benzoate, benzoic acid, sorbic acid and propyl polyhydroxybenzoate.

[0019] The present invention provides a method for preparing a sulfoxaflor pesticide suspension, comprising the following steps: mixing a performance improver in a certain proportion, homogenizing and high shearing (normal temperature, shear rate of 8000-10000 rpm, time of 20-30 min) for uniform use. The sulfoxaflor original drug, the second active ingredient original drug, the performance improver, the wetting agent, the dispersant, the antifreeze agent, the suspending agent, the defoamer, the preservative and the deionized water are mixed according to the formula, mixed and stirred evenly, and then sand-milled (sand milled with a pin-type sand mill, the temperature is controlled below 40°C during the process, and the particle size D is controlled). 90 ≤4μm), and prepared into a suspension concentrate containing sulfoxaflor.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. It has good high temperature storage stability, and is especially suitable for long-term marine transportation of export preparations.

[0022] 2. Good physical and chemical properties, excellent dispersibility and adhesion performance, significantly improving the utilization rate of active ingredients during use, helping to reduce the use of pesticides, save energy and reduce emissions; 3. The adjuvants used in the present invention are safe and environmentally friendly. DETAILED DESCRIPTION

[0023] The present application discloses a sulfoxaflor pesticide suspension and a preparation method thereof. The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents, materials, etc. used in the following examples are all commercially available unless otherwise specified.

[0024] Example 1

[0025] 21% sulfoxaflor pyriproxyfen suspension:

[0026] Calculated by mass content, it consists of 110 kg of sulfoxaflor, 100 kg of pyriproxyfen, 60 kg of performance improver, 30 kg of hydroxypolyethylene oxide block copolymer, 10 kg of Morwet D-360, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.8 kg of xanthan gum, 5 kg of magnesium aluminum silicate, 4 kg of polyalkylsiloxane, and 625.2 kg of deionized water.

[0027] The performance improver is prepared by mixing 150 kg of terminal hydroxy polymethylphenyl silicone oil, 300 kg of dimethyl sulfoxide, 320 kg of isomeric decanol polyoxyethylene ether, and 230 kg of sorbitan trioleate, and homogenizing and high shearing (normal temperature, shear rate of 8000 rpm) for 30 minutes.

[0028] The preparation method of 21% sulfoxaflor·pyriproxyfen suspension comprises the following steps: the above-mentioned performance improvers are mixed in a certain proportion, homogenized and high sheared (normal temperature, shear rate of 8000-10000rpm, time of 20-30min) for even standby. The sulfoxaflor technical, pyriproxyfen technical, performance improver, wetting agent, dispersant, antifreeze agent, suspending agent, defoamer, preservative and deionized water are mixed according to the formula, mixed and stirred evenly, and then sand-milled (sand-milled with a pin-type sand mill, the temperature is controlled to be below 40°C during the process, and the particle size D90 is controlled to be ≤4μm) to prepare 21% sulfoxaflor·pyriproxyfen suspension.

[0029] Example 2

[0030] 35% sulfoxaflor chlorantraniliprole suspension concentrate:

[0031] Calculated by mass content, it consists of 200 kg of sulfoxaflor, 150 kg of chlorantraniliprole, 55 kg of performance improver, 25 kg of sodium salt of alkyl naphthalenesulfonic acid condensate, 10 kg of high molecular graft copolymer with a molecular weight of 20,000 to 30,000, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.5 kg of xanthan gum, 4 kg of magnesium aluminum silicate, 4 kg of polyalkylsilicon oxide and 496.5 kg of deionized water.

[0032] The performance improver is prepared by mixing 150 kg of terminal hydroxy polymethylphenyl silicone oil, 150 kg of dimethyl sulfoxide, 150 kg of propylene glycol, 300 kg of isomeric decanol polyoxyethylene ether, and 250 kg of sorbitan sesquioleate, and homogenizing and high shearing (normal temperature, shear rate of 10000 rpm) for 20 minutes.

[0033] The preparation method of 35% sulfoxaflor·chlorantraniliprole suspension concentrate is the same as that in Example 1.

[0034] Example 3

[0035] 40% sulfoxaflor·cyantraniliprole suspension concentrate:

[0036] Calculated by mass content, it consists of 200 kg of sulfoxaflor, 200 kg of cyantraniliprole, 55 kg of performance improver, 20 kg of alkyl naphthalene sulfonate condensate, 15 kg of isopropyl naphthalene sulfonate, 50 kg of propylene glycol, 5 kg of benzoic acid, 1.3 kg of xanthan gum, 4 kg of magnesium aluminum silicate, 4 kg of polyalkylsilicon oxide and 445.7 kg of deionized water.

[0037] The performance improver is prepared by mixing 150 kg of methylphenyl hydroxy silicone oil, 200 kg of dimethyl sulfoxide, 100 kg of methyl oleate, 320 kg of isomeric decanol polyoxyethylene ether, and 230 kg of sorbitan trioleate, and homogenizing and high shearing (normal temperature, shear rate of 9000 rpm) for 30 minutes.

[0038] The preparation method of 40% sulfoxaflor·cyantraniliprole suspension concentrate is the same as that in Example 1.

[0039] Example 4

[0040] 40% sulfoxaflor·flupyralidone suspension:

[0041] Calculated by mass content, it consists of 150 kg of sulfoxaflor, 250 kg of flupyradanone, 55 kg of performance improver, 20 kg of polycarboxylate, 15 kg of polystyrene polyoxyethylene ether, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.3 kg of xanthan gum, 4 kg of magnesium aluminum silicate, 4 kg of polyalkylsiloxane and 446.7 kg of deionized water.

[0042] The performance improver is prepared by mixing 150 kg of methylphenyl hydroxy silicone oil, 300 kg of dimethyl sulfoxide, 350 kg of castor oil polyoxyethylene ether, and 200 kg of sorbitan sesquioleate, and homogenizing and high shearing (normal temperature, shear rate of 10000 rpm) for 20 minutes.

[0043] The preparation method of 40% sulfoxaflor·flupyralidone suspension concentrate is the same as that in Example 1.

[0044] Example 5

[0045] 40% sulfoxaflor·spinosad SC:

[0046] Calculated by mass content, it consists of 200 kg of sulfoxaflor, 200 kg of spinosad, 50 kg of performance improver, 30 kg of Morwet D-360, 15 kg of hydroxypolyethylene oxide block copolymer, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.2 kg of xanthan gum, 4 kg of polyalkylsiloxane and 445.8 kg of deionized water.

[0047] The performance improver is prepared by mixing 150 kg of methylphenyl vinyl silicone oil, 350 kg of methyl oleate, 200 kg of isomeric decanol polyoxyethylene ether, and 300 kg of polyoxyethylene dioleate, and homogenizing and high shearing (normal temperature, shear rate of 8000 rpm) for 20 minutes.

[0048] The preparation method of 40% sulfoxaflor·spinetoin ethyl suspension is the same as that in Example 1.

[0049] Example 6

[0050] 30% sulfoxaflor·thiamethoxam suspension:

[0051] Calculated by mass content, it consists of 100 kg of sulfoxaflor, 200 kg of thiamethoxam, 60 kg of performance improver, 20 kg of Morwet D-360, 20 kg of high molecular graft copolymer with a molecular weight of 20,000 to 30,000, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.6 kg of xanthan gum, 5 kg of magnesium aluminum silicate, 4 kg of polyalkylsiloxane and 535.4 kg of deionized water.

[0052] The performance improver is prepared by mixing 200 kg of methylphenyl vinyl silicone oil, 300 kg of dimethyl sulfoxide, 220 kg of isomeric decanol polyoxyethylene ether, and 280 kg of polyoxyethylene dioleate, and homogenizing and high shearing (normal temperature, shear rate of 9000 rpm) for 30 minutes.

[0053] The preparation method of 30% sulfoxaflor·thiamethoxam suspension concentrate is the same as that in Example 1.

[0054] Example 7

[0055] 40% sulfoxaflor and spirotetramat suspension:

[0056] Calculated by mass content, it consists of 150 kg of sulfoxaflor, 250 kg of spirotetramat, 40 kg of performance improver, 25 kg of Morwet D-360, 30 kg of polystyrene polyoxyethylene ether, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.2 kg of xanthan gum, 2 kg of magnesium aluminum silicate, 4 kg of polyalkylsiloxane and 443.8 kg of deionized water.

[0057] The performance improver is prepared by mixing 150 kg of terminal hydroxy polymethylphenyl silicone oil, 300 kg of dimethyl sulfoxide, 320 kg of isomeric tridecanol polyoxyethylene ether, and 230 kg of sorbitan anhydride sesquioleate, and homogenizing and high shearing (normal temperature, shear rate of 10000 rpm) for 20 minutes.

[0058] The preparation method of 40% sulfoxaflor·spirotetramat suspension is the same as that in Example 1.

[0059] Example 8

[0060] 30% sulfoxaflor·dipyridamole suspension concentrate:

[0061] Calculated by mass content, it consists of 240 kg of sulfoxaflor, 60 kg of cypermethrin, 60 kg of performance improver, 20 kg of alkyl naphthalene sulfonate condensate, 20 kg of hydroxypolyethylene oxide block copolymer, 60 kg of glycerol, 5 kg of benzoic acid, 1.6 kg of xanthan gum, 6 kg of magnesium aluminum silicate, 4 kg of polyalkylsiloxane and 523.4 kg of deionized water.

[0062] The performance improver is prepared by mixing 150 kg of terminal hydroxyl polymethylphenyl silicone oil, 350 kg of dimethyl sulfoxide, 260 kg of isomeric tridecanol polyoxyethylene ether, and 240 kg of sorbitan trioleate, and homogenizing and high shearing (normal temperature, shear rate of 8000 rpm) for 30 minutes.

[0063] The preparation method of 30% sulfoxaflor·dipyridafloxacin suspension concentrate is the same as that in Example 1.

[0064] Comparative Example 1

[0065] 21% sulfoxaflor pyriproxyfen suspension:

[0066] Calculated by mass content, it consists of 110 kg of sulfoxaflor, 100 kg of pyriproxyfen, 30 kg of hydroxypolyethylene oxide block copolymer, 10 kg of Morwet D-360, 50 kg of propylene glycol, 4 kg of sodium benzoate, 1.8 kg of xanthan gum, 5 kg of magnesium aluminum silicate, 4 kg of polyalkylsiloxane, and 685.2 kg of deionized water.

[0067] Quality technical determination

[0068] The prepared suspension was tested under certain conditions, and the obtained data are shown in Table 1.

[0069] Table 1. Technical test results of suspension concentrate quality

[0070]

[0071] From the data in Table 1, it can be seen that the various indicators of Example 1 are significantly better than those of Control Example 1, especially the stability of the preparation under a long-term high temperature environment, and therefore it is more suitable for the needs of long-term long-distance sea transportation of export preparation products.

[0072] Determination of sedimentation

[0073] Test object: citrus leaves

[0074] Test agents: Example 1, Control Example 1.

[0075] The specific experimental methods are as follows:

[0076] 1. Use an automatic area integrator to measure the area of ​​the leaves to be tested, record the area size and number it in a notebook, put the leaves into plastic bags with corresponding numbers and set aside.

[0077] 2. Use an analytical balance to measure the mass of the leaves, then place the leaves on a self-made stage and fix the petiole with a rubber band to prevent the leaves from being blown away during spraying. The stage is made of paper with a 30-degree inclination angle, a 20-cm long slope, a 10-cm high slope, and a 17.3-cm long bottom edge. A tight rubber band is fixed 5 cm from the top to fix the petiole. The nozzle height is 50 cm.

[0078] 3. Set the crawler speed to 50 rpm, then place the stage on the crawler, and add an appropriate amount of the above-mentioned agent diluted 2500 times to the glass tube next to the nozzle. First turn on the spray switch, then turn on the crawler drive switch, so that the blade passes through the spray range of the nozzle. Turn off the above two switches, remove the blade, put it on the analytical balance to weigh the mass after spraying. Repeat each liquid at least three times. The test results are shown in Table 2.

[0079] Table 2 Deposition of the liquid on citrus leaves

[0080]

[0081] It can be seen from Table 2 that the deposition amount of the 2500-fold diluted solution of Example 1 is significantly higher than that of Control Example 1, and the former is about 29% higher than the latter.

[0082] Efficacy test

[0083] Application method: The test site is Ganzhou, Jiangxi Province, and the time is mid-May 2024. Potted Gan oranges were used for the test. Before spraying, 200 citrus scale insect larvae were inoculated on each plant (120 larvae of the arrow-pointed scale and 80 larvae of the red wax scale were inoculated on each plant). Two days after inoculation, the pesticide was sprayed (the control plant was sprayed with water). When applying the pesticide, the leaves should be sprayed evenly, and the front and back of the leaves should be wetted. Each treatment has 4 pots of citrus, and the control group is sprayed with clean water, and is physically isolated from the test group. At 5h, 7d, and 30d after the drug was applied, the number of dead and alive insects was investigated, and the control effect was calculated. The experimental results are shown in Table 3.

[0084] Table 3. Results of the test on the efficacy of suspension concentrate against citrus scale insects

[0085]

[0086] It can be seen from the test results in Table 3 that the control effects of Example 1 at dilutions of 3000 times and 4000 times on citrus scale insects are significantly better than those of Control Example 1. Therefore, the sulfoxaflor pesticide suspension containing the present invention can well achieve pesticide reduction and efficiency improvement.

[0087] Field test observations showed that, within the test concentration range of each treatment agent, citrus trees grew normally without obvious pesticide damage symptoms such as chlorosis, deformity or poor growth, and no obvious harmful effects of the agent on other organisms were found. Therefore, the sulfoxaflor pesticide suspension containing the present invention has good safety performance.

Claims

1. A pesticide suspension containing sulfoxaflor, characterized in that: Calculated by mass content, the composition comprises 10% to 30% of sulfoxaflor, 10% to 30% of the second active ingredient, 1% to 15% of a performance improver, 1% to 10% of a wetting agent, 1% to 10% of a dispersant, 0.1% to 3% of a suspending agent, 2% to 10% of an antifreeze agent, 0.1% to 0.6% of a defoaming agent, 0.05% to 0.6% of a preservative and deionized water making up to 100%.

2. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The second active ingredient is selected from at least one of pyriproxyfen, ethyl spinosad, spinosad, bromofenac, fluazifop, flutolane, cyantraniliprole, bicyclam, flupyralid, flutolane, chlorantraniliprole, thiamethoxam, cyprodinil, flonicamid, flonicamid, cyclobromofenac, flubendiamide, acetamiprid, spirotetramat, bifenthrin, avermectin, avermectin benzoate and highly effective chlorflucythrinate.

3. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The performance improver is prepared by mixing 10% to 20% of phenyl silicone additive, 20% to 40% of diluent and 40% to 70% of emulsifier based on 100% of total weight, and homogenizing and high shearing (shearing rate at room temperature is 8000 to 10000 rpm) for 20 to 30 minutes.

4. The pesticide suspension containing sulfoxaflor according to claim 3, characterized in that: The phenyl silicone auxiliary agent is selected from at least one of terminal hydroxyl polymethylphenyl silicone oil, methylphenyl hydroxy silicone oil and methylphenyl vinyl silicone oil.

5. The pesticide suspension containing sulfoxaflor according to claim 3, characterized in that: The diluent is selected from at least one of dimethyl sulfoxide, propylene glycol, N,N-dimethylacetamide and methyl oleate.

6. The pesticide suspension concentrate containing sulfoxaflor according to claim 3, characterized in that: The emulsifier is selected from a combination of W / O (water-in-oil) emulsifier and O / W (oil-in-water) emulsifier, and the W / O emulsifier is selected from at least one of sorbitan trioleate, sorbitan anhydride sesquioleate, and polyoxyethylene dioleate. The O / W emulsifier is selected from at least one of isomeric decanol polyoxyethylene ether, isomeric tridecanol polyoxyethylene ether, castor oil polyoxyethylene ether, and C12-14 secondary alcohol polyoxyethylene ether.

7. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The wetting agent is one or a combination of hydroxy polyethylene oxide block copolymer, a high molecular graft copolymer with a molecular weight of 20,000 to 30,000, isopropyl naphthalene sulfonate, and polystyrene polyoxyethylene ether.

8. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The dispersant is one or a combination of Morwet D-360, polycarboxylates, sodium salt of alkyl naphthalene sulfonic acid condensation polymer, and alkyl naphthalene sulfonate condensation polymer surfactants.

9. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The suspending agent is one or a combination of xanthan gum, aluminum magnesium silicate, fumed silica and bentonite.

10. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The antifreeze agent is one or a combination of propylene glycol, glycerol and urea.

11. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The defoaming agent is one or a combination of polyalkylsilicon ethylene oxide, mineral oil and alcohol.

12. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The mildew inhibitor is one or a combination of sodium benzoate, benzoic acid, sorbic acid and propyl polyhydroxybenzoate.

13. The method for preparing the sulfoxaflor pesticide suspension concentrate according to any one of claims 1 to 12, characterized in that: The following steps are involved: The performance improver is mixed in a certain proportion, homogenized and high sheared (normal temperature, shear rate of 8000-10000rpm, time of 20-30min) for use. The sulfoxaflor technical, the second active ingredient technical, the performance improver, the wetting agent, the dispersant, the antifreeze agent, the suspending agent, the defoamer, the preservative and the deionized water are mixed according to the formula, mixed and stirred evenly, and then sand-milled (sand milled with a pin-type sand mill, the temperature is controlled below 40°C during the process, and the particle size D is controlled). 90 ≤4μm), and prepared into a pesticide suspension containing sulfoxaflor.

14. The pesticide suspension concentrate containing sulfoxaflor according to claim 1, characterized in that: The invention is composed, by mass, of sulfoxaflor 110 kg, pyriproxyfen 100 kg, a performance improver 60 kg, a hydroxy polyethylene oxide block copolymer 30 kg, Morwet D-360 10 kg, propylene glycol 50 kg, sodium benzoate 4 kg, xanthan gum 1.8 kg, magnesium aluminum silicate 5 kg, polyalkylsiloxane 4 kg, and deionized water 625.2 kg; The performance improver is prepared by mixing 150 kg of terminal hydroxy polymethylphenyl silicone oil, 300 kg of dimethyl sulfoxide, 320 kg of isomeric decanol polyoxyethylene ether, and 230 kg of sorbitan trioleate, and homogenizing and high shearing (normal temperature, shear rate of 8000 rpm) for 30 minutes.

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