40% diafenthiuron-flonicamid suspending agent and preparation method thereof

Abstract

The invention relates to the field of chemical pesticides, in particular to a 40% diafenthiuron-flonicamid suspending agent and a preparation method thereof. The 40% diafenthiuron-flonicamid suspending agent provided by the invention is prepared from the following raw materials in parts by mass: 30 to 40 parts of diafenthiuron active compound, 5 to 10 parts of flonicamid active compound, 5 to 10 parts of dispersing agent, 1 to 10 parts of anti-freezing agent, 0.1 to 10 parts of thickening agent, 0.1 to 1 part of functional additive and 30 to 50 parts of deionized water. Wherein the dispersing agent comprises a comb-shaped high-molecular carboxylate dispersing agent, a sulfate dispersing agent and a nonionic block polyether wetting dispersing agent. Through screening of the dispersing agent and the thickening agent, the prepared suspending agent is high in stability, has a relatively good insecticidal effect on tea lesser leafhopper, and is efficient and safe in actual use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical pesticides, in particular to a 40% diafenthiuron·flonicamid suspension concentrate and a preparation method thereof. BACKGROUND

[0002] In the field of agricultural production, pest control has always been a key link to ensure crop yield and quality. As one of the common pests in tea gardens, the tea green leafhopper feeds on the sap of tea shoots through its piercing-sucking mouthparts, causing leaf curling, yellowing, and even death of the whole tea plant, directly affecting the yield and quality of tea. With the long-term single use of chemical pesticides, the problem of pest resistance is becoming increasingly prominent. For example, the efficacy of neonicotinoid insecticides such as imidacloprid against tea green leafhopper has decreased to below 50% in some areas, which makes the development of new types of high-efficiency, low-toxicity, and environmentally friendly pesticide formulations a research focus in current agricultural production.

[0003] Currently, diafenthiuron and flonicamid, as two insecticides with different mechanisms of action, exhibit their respective advantages in pest control. Diafenthiuron is a benzoylurea insecticide that inhibits the activity of chitin synthase in insects, interfering with the formation of their cuticle, and is effective against both nymphs and adults, with a persistence period of up to 14 days. However, its action speed is relatively slow, and it is difficult to quickly control pest population outbreaks when used alone. Flonicamid, on the other hand, is a pyridine amide insecticide that blocks the potassium ion channel in pests, causing them to stop feeding rapidly, with a mortality rate of up to 80% within 4 hours. However, its persistence period is relatively short, and it is difficult to achieve long-term control when used alone. Therefore, the combination of the two can be expected to achieve complementary advantages, with both rapid and persistent effects.

[0004] However, the physical and chemical properties of diafenthiuron and flonicamid differ greatly, and after compounding, they are prone to layering, precipitation, or caking, especially under high or low temperature storage conditions. For example, Chinese Patent Application CN103766363A discloses an insecticidal composition containing flonicamid and diafenthiuron, which performs excellently in agricultural control, but does not fully consider the physical stability of the product, leading to potential storage failure problems in actual application. At the same time, traditional dispersants such as castor oil polyoxyethylene ether or lignin sulfonate are difficult to meet the dispersion needs of both types of raw materials, resulting in a decrease in suspension rate or unqualified wet sieve test.

[0005] Therefore, it is of great significance to develop an insecticide suspension concentrate with complementary mechanisms of action, delayed development of pest resistance, and good physical stability. SUMMARY

[0006] In order to solve the above technical problems, the present application provides a 40% butoxycarboxim·spinetoram suspension agent, which is prepared from the following raw materials in parts by mass: 30-40 parts of butoxycarboxim technical material, 5-10 parts of spinetoram technical material, 5-10 parts of dispersing agent, 1-10 parts of antifreeze agent, 0.1-10 parts of thickening agent, 0.1-1 parts of functional adjuvant, and 30-50 parts of deionized water.

[0007] As an implementable case, the mass concentration of the butoxycarboxim technical material is 95-99 wt%.

[0008] As an implementable case, the mass concentration of the spinetoram technical material is 95-99 wt%.

[0009] Further, the mass concentration of the butoxycarboxim technical material is 96 wt%.

[0010] Further, the mass concentration of the spinetoram technical material is 97 wt%.

[0011] Further, the mass ratio of the butoxycarboxim technical material and the spinetoram technical material is 36.14:5.15; that is, the mass ratio of butoxycarboxim and spinetoram is (36.14*96%):(5.15*97%)=35:5 (7:1).

[0012] In the present application, the pesticide technical material is limited to the combination of butoxycarboxim and spinetoram. Butoxycarboxim belongs to the benzoylurea class, and spinetoram belongs to the pyridine amide class. The two have no cross-resistance in the mechanism of action. Butoxycarboxim can effectively inhibit the chitin synthetase of insects and destroy the formation of the cuticle, and is effective on nymphs and adults, with a long-lasting period of up to 14 days. Spinetoram can quickly block the potassium ion channel of piercing-sucking pests, resulting in a mortality rate of 80% within 4 hours. When the mass ratio of butoxycarboxim and spinetoram is limited to 7:1, the two can synergistically act and have the effects of “inhibiting growth” and “quick knockdown”. For a tea green leafhopper population with a resistance to imidacloprid of up to 340 times, the combination agent with the mass ratio can still maintain a control effect of more than 90%, effectively delaying the generation and development of pest resistance and ensuring the durability of the control effect, and the control effect is significantly better than that of a single agent. According to the monitoring of the National Agricultural Technology Center, the resistance ratio of spinetoram to the tea green leafhopper is generally less than 15 times. By combining butoxycarboxim at the mass ratio, the resistance risk of spinetoram used alone can be further reduced, the service life of spinetoram can be prolonged, and a more reliable pesticide selection is provided for the sustainable management of pests in tea gardens.

[0013] However, the surface charge characteristics of butoxycarb and flonicamid granules are different, and the molecular structure of the conventional dispersant cannot form sufficient steric hindrance on the surface of the two technical granules and cannot provide sufficient electrostatic repulsion for them, resulting in easy aggregation and precipitation between the technical granules, relatively poor thermal storage stability and low-temperature stability of the suspension concentrate product, and affecting the normal use of the product.

[0014] As an implementable case, the dispersant includes a comb-shaped high molecular carboxylate dispersant, a sulfate dispersant and a non-ionic block polyether wetting dispersant.

[0015] Further, the mass ratio of the comb-shaped high molecular carboxylate dispersant, the sulfate dispersant and the non-ionic block polyether wetting dispersant is (1-10):(1-3):(1-5).

[0016] Further, the mass ratio of the comb-shaped high molecular carboxylate dispersant, the sulfate dispersant and the non-ionic block polyether wetting dispersant is 4:1:1.

[0017] In the present application, the selected dispersant includes a comb-shaped high molecular carboxylate dispersant, a sulfate dispersant and a non-ionic block polyether wetting dispersant, which are compounded as dispersants, and the mass ratio of the comb-shaped high molecular carboxylate dispersant, the sulfate dispersant and the non-ionic block polyether wetting dispersant is further limited to (1-10):(1-3):(1-5), which can further improve the thermal storage stability and low-temperature stability of the suspension concentrate, mainly because the comb-shaped high molecular carboxylate dispersant can be adsorbed on the surface of butoxycarb and flonicamid granules, generate electrostatic repulsion with the same charge, and prevent particle aggregation; the sulfate dispersant and the non-ionic block polyether wetting dispersant further reduce the interaction force between the particles, provide steric hindrance, enhance the dispersion effect, form a more uniform and stable suspension system, synergistically thicken, increase the viscosity of the system, slow down the particle settling speed, and prevent the particles from rapidly settling due to the intensification of thermal motion during high-temperature thermal storage; at low temperature, it can prevent the particles from caking due to the increase in viscosity and maintain the stability of the suspension system. In addition, the surface charge and chemical properties of butoxycarb and flonicamid are different, and a single dispersant cannot meet the demand. The comb-shaped high molecular carboxylate dispersant, the sulfate dispersant and the non-ionic block polyether wetting dispersant can be compounded to match the surface characteristics of the two technical granules respectively, provide a suitable dispersion environment, enhance the dispersibility and stability of the particles in the aqueous medium, and prevent particle aggregation and caking at low temperature during thermal storage.

[0018] As an implementable case, the antifreeze agent includes one or more of methanol, ethanol, isopropyl alcohol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, and ethylene glycol butyl ether acetate.

[0019] Further, the antifreeze agent is ethylene glycol.

[0020] Ethylene glycol as an antifreeze in the suspension agent can form a network structure with hydrophilic, together with comb-shaped polymer carboxylate dispersant, sulfate dispersant and non-ionic block polyether wetting dispersant, can better wrap the diafenthiuron and flonicamid particles, enhance the repulsive force between the particles, prevent the particles from gathering and settling due to temperature rise in the heat storage process, further improve the heat storage stability of the suspension agent. At the same time, under low temperature conditions, it can also prevent the particles from being dispersed unevenly due to temperature reduction, and enhance the low temperature stability of the suspension agent.

[0021] As an implementable case, the thickening agent includes an organic thickening agent and an inorganic thickening agent.

[0022] Further, the mass ratio of the organic thickening agent and the inorganic thickening agent is (3-5):(0.3-1).

[0023] Further, the organic thickening agent includes one or more of xanthan gum, sodium carboxymethyl cellulose, sodium polyacrylate, and polyvinylpyrrolidone.

[0024] Further, the inorganic thickening agent includes one or more of sodium chloride, potassium chloride, ammonium chloride, sodium sulfate, sodium phosphate, magnesium aluminum silicate, disodium phosphate, and pentasodium triphosphate.

[0025] Further, the organic thickening agent is xanthan gum, and the inorganic thickening agent is magnesium aluminum silicate; the mass ratio of xanthan gum and magnesium aluminum silicate is 5:1.

[0026] Xanthan gum is a high-efficiency organic thickening agent with unique rheological properties. In aqueous solution, even at very low concentrations, it can significantly increase the viscosity of the system, making the system have good pseudoplastic rheological properties, that is, the system has high viscosity when at rest, which can effectively prevent particle settling, while under external force, the viscosity decreases, making the suspension agent easy to apply. Magnesium aluminum silicate is an inorganic thickening agent and a suspending agent with high dispersibility and adsorbability, which can form a network structure and increase the thixotropy of the system, fixing the suspended particles when at rest to prevent their settling and aggregation. When xanthan gum and magnesium aluminum silicate are compounded at a mass ratio of 5:1, the viscosity of xanthan gum and the network structure of magnesium aluminum silicate synergize to form a more solid and uniform three-dimensional network, which can more effectively wrap and support diafenthiuron and flonicamid particles, making the particles uniformly distributed in the entire system and stably suspended, thereby improving the stability of the suspension agent. However, when the mass ratio of the two components is unreasonable, the rheological properties and stability of the system will deteriorate. If the proportion of xanthan gum is too high, the viscosity of the system will be too large, affecting the application performance, and the dispersibility of magnesium aluminum silicate will be poor, affecting the suspension effect; on the contrary, the viscosity of the system is not enough, the particles settle quickly, and the stability decreases.

[0027] As an implementable case, the functional aid includes a preservative and a defoaming agent.

[0028] Further, the preservative includes preservative KM10.

[0029] Further, the antifoaming agent includes antifoaming agent X-513.

[0030] The second aspect of the present application provides a preparation method of 40% butoxycarboxim·flonicamid suspension concentrate, comprising:

[0031] Butyloxycarboxim technical material, flonicamid technical material, dispersant, antifreeze, thickening agent, functional additive, and deionized water are uniformly mixed, sheared into a uniform slurry, the slurry is poured into a sand mill with sand grinding beads, and continuous sand grinding is carried out for 1-1.5 hours; then the thickening agent is added, and sand grinding is continued to obtain 40% butoxycarboxim·flonicamid suspension concentrate.

[0032] Further, the preparation method of 40% butoxycarboxim·flonicamid suspension concentrate comprises:

[0033] Deionized water, ethylene glycol, comb-shaped high molecular carboxylate dispersant, sulfate dispersant, non-ionic block polyether wetting dispersant, and magnesium aluminum silicate are uniformly stirred in a beaker, then flonicamid technical material and butoxycarboxim technical material are added, antifoaming agent X-513 and preservative KM10 are added dropwise, and a uniform slurry is sheared; the slurry is poured into a laboratory sand mill with sand grinding beads, and continuous sand grinding is carried out for 1-1.5 hours; then xanthan gum is added, and sand grinding is continued for 10 minutes to obtain 40% butoxycarboxim·flonicamid suspension concentrate.

[0034] Beneficial effects

[0035] (1) The 40% butoxycarboxim·flonicamid suspension concentrate provided by the present application realizes the complementation of two action mechanisms by compounding butoxycarboxim and flonicamid. Butoxycarboxim inhibits insect chitin synthetase and destroys the formation of the epidermis, and has a long effective period; flonicamid rapidly blocks the potassium ion channel of piercing-sucking pests, causing them to stop feeding. The synergistic effect of the two significantly improves the control effect on pests such as tea green leafhoppers, and the control effect 7 days after application can reach 91.9%, which is better than that of a single pesticide.

[0036] (2) Butoxycarboxim belongs to the benzoyl urea class, and flonicamid belongs to the pyridine amide class, and the two have no cross-resistance in action mechanism. The compound suspension concentrate still maintains a control effect of more than 90% on tea green leafhopper populations with imidacloprid resistance of up to 340 times, effectively delays the development of pest resistance, and prolongs the service life of the pesticide.

[0037] (Three) The present application optimizes the dispersant formula, selects a comb-shaped high molecular carboxylate dispersant, a sulfate dispersant and a non-ionic block polyether wetting dispersant as a dispersant, and the suspension agent product is stable under hot storage and cold storage conditions. The decomposition rate of the active ingredient is less than 5% after hot storage, the suspension rate is greater than or equal to 90%, the wet sieve test passing rate is greater than or equal to 98%, and the indexes such as pouring property and persistent foaming property all meet the standards, solving the problems of stratification and caking of similar products.

[0038] (Four) The present application limits the thickening agent to xanthan gum and magnesium aluminum silicate, which ensures the physical stability of the preparation. The suspension agent does not have caking or stratification under hot storage and cold storage conditions, and has excellent dilution stability and suspension rate.

[0039] (Five) Field experiments show that the suspension agent provided by the present application has a control effect of 67.3%-79.1% one day after application at an active ingredient dosage of 300-420 g / ha, and the control effect is improved to 81.9%-91.9% seven days after application, which is significantly better than that of single component control, and is safe to non-target organisms, suitable for large-scale promotion. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 Appearance picture of 40% butoxycarboxim·flonicamid suspension agent prepared in Example 1.

[0041] Figure 2 Appearance picture of 40% butoxycarboxim·flonicamid suspension agent prepared in Example 5. DETAILED DESCRIPTION

[0042] In the following Examples 1-8, the relevant raw material information is shown in Table 1.

[0043] Table 1

[0044]

[0045]

[0046] Example 1

[0047] The first aspect of the present example provides a 40% butoxycarboxim·flonicamid suspension agent, which is prepared from the following raw materials in parts by mass: 36.43g butoxycarboxim technical material, 5.15g flonicamid technical material, 6g dispersant, 4g antifreeze, 7.2g thickening agent, 0.6g functional additive, and 40.59g deionized water.

[0048] The mass concentration of the butoxycarboxim technical material is 96%, i.e. the effective amount of butoxycarboxim is 35g.

[0049] The mass concentration of the flonicamid technical material is 97%, i.e. the effective amount of flonicamid is 5g.

[0050] The dispersant is a comb-shaped high molecular carboxylate dispersant, a sulfate dispersant and a non-ionic block polyether wetting dispersant, and the mass ratio of the comb-shaped high molecular carboxylate dispersant, the sulfate dispersant and the non-ionic block polyether wetting dispersant is 4:1:1.

[0051] The antifreeze agent is ethylene glycol.

[0052] The thickening agent is 0.5 g of inorganic thickening agent magnesium aluminum silicate and 6.7 g of 1.5 wt% organic thickening agent xanthan gum aqueous solution (the effective mass content of xanthan gum is 0.1 g) according to the mass.

[0053] The functional auxiliary agent includes a preservative and a defoaming agent, and the mass ratio of the preservative and the defoaming agent is 1:1.

[0054] The preservative is preservative KM10.

[0055] The defoaming agent is defoaming agent X-513.

[0056] The second aspect of the example provides a preparation method of 40% butoxycarboxim · sulfoxaflor suspension concentrate, specifically:

[0057] In a 150 mL beaker, first add deionized water, ethylene glycol, a comb-shaped high molecular carboxylate dispersant, a sulfate dispersant, a non-ionic block polyether wetting dispersant, magnesium aluminum silicate, and stir until uniform, then add sulfoxaflor technical material and butoxycarboxim technical material, drop defoaming agent and preservative KM10, shear into uniform slurry, pour the slurry into a 0.1 L laboratory vertical small sand mill with sanding beads, continuously sand mill for 1 h, then add xanthan gum aqueous solution, and continue sanding for 10 min to obtain 40% butoxycarboxim · sulfoxaflor suspension concentrate.

[0058] The appearance picture of the 40% butoxycarboxim · sulfoxaflor suspension concentrate prepared in the example is shown in Figure 1 .

[0059] Example 2

[0060] The specific implementation of the example is the same as that of example 1, and the difference lies in that the dispersant is a hydroxyl polyethylene oxide block copolymer salt.

[0061] Example 3

[0062] The specific implementation of the example is the same as that of example 1, and the difference lies in that:

[0063] 1. The preparation of the 40% butoxycarboxim·spinetoram suspension agent, the raw materials are as follows in terms of mass fraction: 36.43 g of butoxycarboxim, 5.15 g of spinetoram, 5.5 g of dispersant, 4 g of antifreeze, 7.2 g of thickening agent, 0.6 g of functional additive, and 41.09 g of deionized water.

[0064] 2. The dispersant is a polycarboxylate wetting dispersant.

[0065] Example 4

[0066] The specific implementation of this example is the same as that of Example 1, except that:

[0067] 1. The preparation of the 40% butoxycarboxim·spinetoram suspension agent, the raw materials are as follows in terms of mass fraction: 36.43 g of butoxycarboxim, 5.15 g of spinetoram, 5.5 g of dispersant, 4 g of antifreeze, 7.2 g of thickening agent, 0.6 g of functional additive, and 41.09 g of deionized water.

[0068] 2. The dispersant is a sulfonate wetting dispersant.

[0069] Example 5

[0070] The specific implementation of this example is the same as that of Example 1, except that:

[0071] 1. The preparation of the 40% butoxycarboxim·spinetoram suspension agent, the raw materials are as follows in terms of mass fraction: 36.43 g of butoxycarboxim, 5.15 g of spinetoram, 7 g of dispersant, 4 g of antifreeze, 7.2 g of thickening agent, 0.6 g of functional additive, and 39.59 g of deionized water.

[0072] 2. The dispersant is a sulfated salt wetting dispersant.

[0073] The appearance of the 40% butoxycarboxim·spinetoram suspension agent prepared in this example is shown in Figure 2 .

[0074] Example 6

[0075] The specific implementation of this example is the same as that of Example 1, except that:

[0076] 1. The preparation of the 40% butoxycarboxim·spinetoram suspension agent, the raw materials are as follows in terms of mass fraction: 36.43 g of butoxycarboxim, 5.15 g of spinetoram, 6.5 g of dispersant, 4 g of antifreeze, 7.2 g of thickening agent, 0.6 g of functional additive, and 40.09 g of deionized water.

[0077] 2. The dispersant is a hydrophobically modified carboxylate.

[0078] Example 7

[0079] The specific embodiment of the present case is the same as that of Example 1, except that:

[0080] 1. The preparation of the 40% butoxycarburyl·flonicamid suspension agent uses the following raw materials in terms of mass fraction: 36.43g of butoxycarburyl, 5.15g of flonicamid, 5.5g of dispersant, 4g of antifreezing agent, 7.2g of thickening agent, 0.6g of functional additive, and 41.09g of deionized water.

[0081] 2. The dispersant is a non-ionic EO / PO block copolymer.

[0082] Example 8

[0083] The specific embodiment of the present case is the same as that of Example 1, except that:

[0084] 1. The preparation of the 40% butoxycarburyl·flonicamid suspension agent uses the following raw materials in terms of mass fraction: 36.43g of butoxycarburyl, 5.15g of flonicamid, 5.5g of dispersant, 4g of antifreezing agent, 7.2g of thickening agent, 0.6g of functional additive, and 41.09g of deionized water.

[0085] 2. The dispersant is a non-ionic EO / PO block copolymer.

[0086] Performance test

[0087] I. Physicochemical performance test

[0088] The 40% butoxycarburyl·flonicamid suspension agent should be a white-like flowable, easy-to-measure volume, and non-specific irritating odor suspension liquid; during storage, it may have a precipitate, but it should return to its original state after shaking, and should not have lumps, and the technical indicators should meet the requirements of Table 2.

[0089] Table 2

[0090]

[0091]

[0092] II. Pesticide stability and physicochemical performance test

[0093] Test object: the 40% butoxycarburyl·flonicamid suspension agent prepared in Examples 1-8.

[0094] The test items and experimental results are shown in Table 3.

[0095] Table 3

[0096]

[0097]

[0098]

[0099] The relevant test standards are as follows:

[0100] GB / T 1601: Determination of pH value of pesticides;

[0101] GB / T 1604: Acceptance rules for commercial pesticides;

[0102] GB / T 1605-2001: Sampling method for commercial pesticides;

[0103] GB 3796: General rules for pesticide packaging;

[0104] GB / T 8170-2008: Numerical rounding rules and representation and determination of limit values; GB / T 14825-2006: Determination of pesticide suspension rate;

[0105] GB / T 16150-1995: Determination of fineness of pesticide powders and wettable powders; GB / T 19136-2021: Determination of thermal storage stability of pesticides;

[0106] GB / T 19137-2003: Determination of low temperature stability of pesticides;

[0107] GB / T 28137: Determination of persistent foaming property of pesticides;

[0108] GB / T 31737: Determination of pourability of pesticides;

[0109] GB / T 32776-2016: Determination of density of pesticides.

[0110] From the experimental results in Table 3, it can be seen that the comb-shaped high molecular carboxylate dispersant, sulfuric acid ester dispersant and non-ionic block polyether wetting dispersant with a mass ratio of 4:1:1 are selected as the dispersant, which can effectively improve the thermal storage stability and low temperature stability of 40% butoxycarburyl. fluazinam suspension concentrate; while the dispersant used in Example 2-8 corresponds to the prepared 40% butoxycarburyl. fluazinam suspension concentrate has relatively poor stability.

[0111] Four, field experiment

[0112] The test was carried out in Xiangyin County, Hunan Province in June 2021 (Nanquan Temple), and the test site has been seriously affected by tea tree tea leafhoppers for many years.

[0113] The test was carried out in Xiangyin County, Hunan Province in June 2021 (Nanquan Temple), and the test site has been seriously affected by tea tree tea leafhoppers for many years. 2, 24 plots in total, randomized block design. Spray method was used to spray at the occurrence of tea green leafhopper. Before spraying, the selected sprayer and nozzle were calibrated to measure the average output, and the required spraying time for each plot was calculated according to the sprayer output and the required amount of liquid for the plot; when spraying, spraying was started from one side of the plot, the spray width and height were kept consistent, and uniform spraying was performed without over-spraying or under-spraying, and a dedicated person was in charge of timing and controlling the walking speed; after spraying was completed for each plot, the remaining liquid in the sprayer was collected and the spraying deviation was calculated. The spraying deviation in this test was within ±10%, and the amount of liquid sprayed per mu was 50L. A blank control of water was also set. The insect population was investigated before spraying, and the investigation was conducted once at 1, 3 and 7 days after spraying, and the control effect of the pesticide was evaluated, and the test results are shown in Table 4.

[0114] Table 4

[0115]

[0116]

[0117] Among them, the efficacy calculation method is calculated according to formula (1), formula (2) or formula (3).

[0118] Formula (1):

[0119] Formula (2):

[0120] Formula (3):

[0121] From the experimental results in Table 4, it can be seen that the use of 40% butoxycarboxim · flonicamid suspension concentrate has more excellent control effect on tea green leafhopper compared with the single-component raw material product.

Claims

1. A 40% butoxycarb 1 * fluazaindaryl suspension concentrate characterized in that, The raw materials are prepared according to the mass fraction, including 30-40 parts of butoxycarbamate original drug, 5-10 parts of flonicamid original drug, 5-10 parts of dispersant, 1-10 parts of antifreeze agent, 0.1-10 parts of thickening agent, 0.1-1 parts of functional additive, 30-50 parts of deionized water; The dispersant includes a comb-shaped high molecular carboxylate dispersant, a sulfate dispersant and a non-ionic block polyether wetting dispersant.

2. The 40% butoxycarburyl · flonicamid suspension agent according to claim 1, characterized in that, The mass ratio of the comb-shaped high molecular carboxylate dispersant, the sulfate dispersant and the non-ionic block polyether wetting dispersant is (1-10):(1-3):(1-5). 3.The 40% butylene ether urea·flonicamid suspension concentrate of claim 1, characterized in that, The mass concentration of the butoxycarbamate original drug is 95-99wt%, and the mass concentration of the flonicamid original drug is 95-99wt%.

4. The 40% butylene ether urea·flonicamid suspending agent according to any one of claims 1-3, characterized in that, The antifreeze agent includes one or more of methanol, ethanol, isopropyl alcohol, ethylene glycol, propylene glycol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, ethylene glycol butyl ether acetate. 5.The 40% butylene ether urea·flonicamid suspension concentrate of claim 1, characterized in that, The thickening agent includes an organic thickening agent and an inorganic thickening agent. 6.The 40% butylene ether urea·flonicamid suspension concentrate of claim 5, characterized in that, The mass ratio of the organic thickening agent and the inorganic thickening agent is (3-5):(0.3-1).

7. The 40% butoxycarburyl · flonicamid suspension agent according to claim 5, characterized in that, The organic thickening agent includes one or more of xanthan gum, sodium carboxymethyl cellulose, sodium polyacrylate and polyvinylpyrrolidone. 8.The 40% butylene ether urea·flonicamid suspension concentrate of claim 5, characterized in that, The inorganic thickening agent includes one or more of sodium chloride, potassium chloride, ammonium chloride, sodium sulfate, sodium phosphate, magnesium aluminum silicate, disodium phosphate and pentasodium triphosphate. 9.The 40% butylene ether urea·flonicamid suspension concentrate of claim 1, characterized in that, The functional additive includes a preservative and a defoaming agent.

10. A method for preparing the 40% butylene ether urea·flonicamid suspension concentrate according to any one of claims 1-9, characterized in that, The method includes the following steps: The butoxycarbamate original drug, the flonicamid original drug, the dispersant, the antifreeze agent, the thickening agent, the functional additive and the deionized water are mixed uniformly, sheared into a uniform slurry, poured into a sand mill with sanding beads, continuously sanded for 1-1.5 hours, then the thickening agent is added and sanding is continued to obtain 40% butoxycarbamate·flonicamid suspension concentrate.

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