Cyromazine cyantraniliprole suspending agent and preparation method thereof

Abstract

The invention relates to the technical field of pesticides, in particular to a cyromazine and cyantraniliprole suspending agent and a preparation method thereof.The cyromazine and cyantraniliprole suspending agent is prepared from, by weight, 5%-20% of cyromazine raw medicine, 20%-40% of cyantraniliprole raw medicine, 8%-20% of dispersing agents, 1%-5% of wetting agents, 0.1%-2% of thickening agents, 0.1%-1% of pH regulators, 1%-8% of antifreeze agents, 0.01%-0.5% of defoaming agents, 0.01%-0.5% of preservatives and the balance deionized water, cyromazine and cyantraniliprole are combined according to the mass ratio of 1: (2-4), a good synergistic effect is achieved, under the action of a specific dispersing agent, a wetting agent, a thickening agent and other auxiliaries, the product has an excellent prevention and treatment effect on cucumber vegetable leafminer, the drug resistance of insect bodies is delayed, the dosage is reduced, and the effect of preventing and treating cucumber vegetable leafminer is achieved. Meanwhile, packaging waste generated by independently using two single agents is reduced, and the pressure of chemical pesticides on environments such as soil and water is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, in particular to a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof. Background Art

[0002] Cyromazine (chemical name: N-cyclopropyl-1,3,5-triazine-2,4,6-triamine) is an insect growth regulator with strong systemic conduction effect, which can induce morphological deformation of Diptera larvae and pupae, and incomplete or inhibited emergence of adults. With the continuation of chemical control of agricultural pests and diseases, the increase in the use of pesticides and the unscientific use of pesticides, pest resistance is becoming increasingly serious. The mixing of different pesticide varieties is an important means to improve the control effect, reduce the amount of pesticides used, reduce costs and delay the development of pest resistance. At present, there are compound systems of various original drugs such as cyromazine and abamectin, dinotefuran, cypermethrin, and tefluthrin. For example, a Chinese patent (authorization announcement number is CN106035364B) discloses an insecticide composition containing tefluthrin and cyromazine, and a Chinese patent application (authorization announcement number is CN105941423B) provides an insecticide composition containing cypermethrin and cyromazine, which is applied to leek fields to prevent and control leek maggots, but there are large differences in the stability and biological activity of the original pesticides under different dosage forms. Suspension concentrates use water as a matrix, have good environmental compatibility, are safe and convenient to process and use, and have low cost. However, since the water suspension system is a kinetically unstable system, especially for the cyromazine·cyanamide original drug combination, it is of great practical significance to develop a stable suspension concentrate containing the cyromazine·cyanamide original drug combination that meets the use requirements. Summary of the invention

[0003] In one aspect, the present invention discloses a cyromazine-cyantraniliprole suspension, which comprises, by weight percentage, 5-20% of cyromazine technical drug, 20-40% of cyantraniliprole technical drug, 8-20% of dispersant, 1-5% of wetting agent, 0.1-2% of thickener, 0.1-1% of pH regulator, 1-8% of antifreeze agent, 0.01-0.5% of defoamer, 0.01-0.5% of preservative, and the balance is made up of deionized water.

[0004] As a preferred technical solution, the mass ratio of the cyromazine technical drug and the cyantraniliprole technical drug is 1:(2-4), preferably 1:3. Based on the system of the present invention, cyromazine and cyantraniliprole are used as effective active ingredients, especially the mass ratio of cyromazine and cyantraniliprole is controlled to be 1:(2-4) to have a good synergistic effect. Under the action of specific dispersants, wetting agents, thickeners and other adjuvants, the provided cyromazine·cyantraniliprole suspension product has excellent control effect on cucumber leafminers, delays insect resistance, reduces the dosage, and reduces the packaging waste generated by using two single doses separately, thereby alleviating the pressure of chemical pesticides on soil, water and other environments.

[0005] As a preferred technical solution, the dispersant is at least one of a sulfonate dispersant, a phosphate dispersant, and a carboxylate dispersant. Preferably, the dispersant includes at least a carboxylate dispersant and a phosphate dispersant, and the carboxylate dispersant is a modified carboxylate polymer. Further preferably, the carboxylate dispersant is an acrylate copolymer, preferably AGRILAN 788 (Nolyon); the phosphate dispersant is an alkyl aryl polyether polyol phosphate, preferably sp-3060 (Qingyu Chemical).

[0006] As a preferred technical solution, the dispersant further comprises EO / PO block polyether (block copolymer composed of EO (ethylene oxide) and PO (propylene oxide)). Preferably, the molecular weight of the EO / PO block polyether is 3000-8000, preferably 5000-6000, and most preferably Ethylan 324 (Nouryon).

[0007] Preferably, the mass ratio of the acrylic ester copolymer, the alkyl aryl polyether polyol phosphate, and the EO / PO block polyether is (4-8):(3-12):(1-5), preferably (2-4):(2-4):1, and most preferably 3:3:1.

[0008] The solubility of cyromazine in water at 20°C and pH 7.5 is 11g / L. Due to its water-soluble characteristics, the prepared suspension product generally has the problem of crystal precipitation. The present invention introduces a conventional sulfonate dispersant (Fangzhong Chemical DS539) in the early stage, but the suspension rate of cyromazine original drug and cyantraniliprole original drug in the prepared product can only reach 90% and will drop to 85% after heat storage. By optimizing the dispersant and selecting a carboxylate dispersant, although the suspension rate can be increased to about 95%, the viscosity of the suspension product is large and there are many bubbles, which is not conducive to filling. Through further screening optimization, it is unexpectedly found that the carboxylate dispersant and the phosphate dispersant are introduced into the suspension system at the same time, especially the introduction of acrylic acid ester copolymers and alkyl aryl polyether polyol phosphates to achieve low viscosity (20±2°C, No. 2 rotor, 6 turns / min, 2000mpa.s), high suspension rate (99%), and high heat storage suspension rate (95%) The preparation of the suspension product has excellent pourability and can meet the actual use requirements. However, when cyantraniliprole technical produced by different manufacturers is used to prepare suspension concentrate products, some products show the phenomenon of thermal storage paste or crystal precipitation. The present invention further introduces EO / PO block polyether, especially EO / PO block polyether with a molecular weight of 5000-6000, so that the provided suspension concentrate product system has adaptability to technical drugs of different manufacturers.

[0009] As a preferred technical solution, the wetting agent is selected from at least one of polycarboxylates, alkylnaphthalene sulfonates, fatty alcohol polyoxyethylene ethers, and sodium lauryl sulfate. Preferably, the wetting agent is polycarboxylates, selected from at least one of SP-2728, SP-2750, SP-2836, and SP-27001, and most preferably SP-27001 (Qingyu Chemical).

[0010] The cyromazine-cyantraniliprole suspension provided by the present invention effectively wets cyromazine and cyantraniliprole technical drugs at a relatively low addition amount by introducing polycarboxylate as a wetting agent, and is helpful for the dispersion of the technical drugs by acrylate copolymer, alkyl aryl polyether polyol phosphate and EO / PO block polyether.

[0011] As a preferred technical solution, the pH regulator is selected from at least one of citric acid, glacial acetic acid, phosphoric acid, sodium citrate, and ammonia water, preferably citric acid.

[0012] As a preferred technical solution, the antifreeze agent is selected from at least one of ethylene glycol, propylene glycol, glycerol, and sodium chloride, preferably propylene glycol and / or glycerol.

[0013] Based on the solubility characteristics and stability of the cypermethrin technical and cyantraniliprole technical, the pH control of the system and the selection of antifreeze agents were optimized. During the exploration process, the inventors found that by introducing propylene glycol and / or propylene glycol as antifreeze agents into the cypermethrin·cyantraniliprole suspension system and adding citric acid to adjust the pH of the system to a weakly acidic environment (pH 6-7), the stability and fluidity of the product were ensured. Based on cost considerations, propylene glycol was used in combination with citric acid. The product prepared using sodium chloride as the antifreeze agent showed stratification and bottoming after 14 days of hot storage. The product prepared using ethylene glycol as the antifreeze agent had a small amount of crystal precipitation during hot storage screening. The product would immediately become a paste or viscous in an alkaline environment.

[0014] As a preferred technical solution, the thickener is selected from at least one of magnesium aluminum silicate, attapulgite, and xanthan gum, preferably a combination of attapulgite and xanthan gum. Preferably, the mass ratio of attapulgite to xanthan gum is (3-5):1, preferably 4:1. The attapulgite is preferably FG (Adif, hydrated magnesium-rich aluminum silicate).

[0015] As a preferred technical solution, the defoaming agent is a silicone defoaming agent, preferably polydimethylsiloxane (SAG 1572).

[0016] The suspension product provided by the present invention is prepared into a nanopesticide by sand-grinding the product particle size to less than 0.5 μm, and the efficacy of the suspension product is significantly improved without affecting the stability of the product, which is about 15% higher than that of conventional suspensions. In order to meet the preparation requirements of nanopesticides, the present invention optimizes the thickener system to be a combination of attapulgite and xanthan gum in combination with a specific preparation process. Specifically, the present invention optimizes the mass ratio of attapulgite and xanthan gum to (3-5): 1, especially using FG effectively controls the water absorption rate of the suspension product after hot storage while avoiding excessive viscosity of the product affecting pourability. In the subsequent sand milling process, no matter how long the grinding time is, its thickening performance will basically not be damaged, avoiding the loss of its own thickening ability of ordinary thickeners under high temperature or long-term grinding. On the other hand, xanthan gum and antifreeze agent are mixed into mixed liquid B, and mixed liquid B is designed to be added in two stages, which effectively avoids the thickening performance of xanthan gum due to repeated grinding during the sand milling process. It also reduces the sedimentation of materials due to gravity before passing through the sand mill, which leads to the problem of inability to produce continuously.

[0017] As a preferred technical solution, the preservative is an isothiazolinone derivative, preferably benzisothiazoline-3-one (BIT 20).

[0018] Another aspect of the present invention provides a method for preparing a cyromazine-cyantraniliprole suspension concentrate, comprising at least the following steps:

[0019] (1) putting deionized water, a wetting agent, a dispersant, 30-40 wt% of a defoaming agent, and a pH adjuster into a shear pot for shearing and dispersion to obtain a dispersion A;

[0020] (2) Then, the cyromazine technical drug and cyantraniliprole technical drug are added into the dispersion A, and after shearing and dispersing evenly, a thickener and an antifreeze agent are added, and after further shearing and dispersing, 30-40 wt % of a defoamer is added, and then sand milling is performed using a sand mill;

[0021] (3) After the sand milling is completed, samples are taken for wet screening test. After the wet screening test is qualified, the remaining defoaming agent and preservative are added, and the product is obtained after shearing and dispersion.

[0022] Preferably, the preparation method of the cyromazine / cyantraniliprole suspension concentrate specifically comprises the following steps:

[0023] (1) Deionized water, a wetting agent, a dispersant, 30-40 wt% of a defoaming agent, and a pH adjuster are placed in a shear pot for shearing and dispersion to obtain a dispersion A; xanthan gum and an antifreeze agent are mixed to obtain a mixed solution B;

[0024] (2) Then, the cyromazine technical and cyantraniliprole technical are added into the dispersion A, and after shearing and dispersing evenly, attapulgite and 30-40 wt % of the mixed solution B are added, and after continuing the shearing and dispersing for 20-60 min, 30-40 wt % of the defoamer is added, and then sand milling is performed using a nano sand mill;

[0025] (3) The particle size D90 is controlled to be less than 0.5 μm during sand milling. After the sand milling is completed, a sample is taken for wet screening test. After the wet screening test is qualified, the remaining defoamer, preservative and the remaining mixed solution B are added, and the mixture is obtained after shear dispersion for 20-60 minutes.

[0026] In the present application, the defoaming agent is further designed to be added in three stages, so as to reduce the generation of bubbles during shearing and stirring, and the sand-milled material can be defoamed more quickly without reducing the defoaming effect, thereby achieving efficient continuous production.

[0027] Beneficial Effects

[0028] 1. The present invention provides a cyromazine-cyantraniliprole suspension concentrate, which uses cyromazine and cyantraniliprole as effective active ingredients, especially controlling the combination of cyromazine and cyantraniliprole in a mass ratio of 1:(2-4) to have a good synergistic effect. Under the action of specific dispersants, wetting agents, thickeners and other auxiliary agents, the cyromazine-cyantraniliprole suspension concentrate product provided has excellent control effects on cucumber leafminers, delays insect resistance, reduces the amount of medicine used, and reduces packaging waste generated by using two single doses separately, thereby alleviating the pressure of chemical pesticides on soil, water and other environments.

[0029] 2. The present invention introduces carboxylate dispersants and phosphate dispersants into the suspension agent system at the same time, especially introduces an acrylic acid ester copolymer in combination with an alkyl aromatic polyether polyol phosphate to achieve the preparation of a suspension agent product with low viscosity (20±2°C, rotor No. 2, 6 rpm, 2000 mPa.s), high suspension rate (99%), and high heat storage suspension rate (95%). The product has excellent pourability and can meet actual use requirements.

[0030] 3. The suspension product provided by the present invention is prepared into nanopesticide by sand-grinding the product particle size to below 0.5 μm, which significantly improves the efficacy of the suspension product without affecting the stability of the product, and is improved by about 15% compared with conventional suspension products.

[0031] 4. In one aspect, the present invention optimizes the mass ratio of attapulgite and xanthan gum to (3-5):1, especially using FG can effectively control the water absorption rate of suspension products after hot storage while avoiding excessive viscosity of the product affecting pourability. In the subsequent sand grinding process, no matter how long the grinding time is, its thickening performance will not be damaged, thus avoiding the loss of its own thickening ability of ordinary thickeners under high temperature or long-term grinding.

[0032] 5. On the other hand, xanthan gum and antifreeze agent are prepared into mixed liquid B, and mixed liquid B is designed to be added in two stages, which effectively avoids the decrease in thickening performance of xanthan gum due to repeated grinding during the sand milling process, and reduces the sedimentation of materials due to gravity before passing through the sand mill, which leads to the problem of inability to produce continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a product state diagram of the suspension provided in Comparative Example 1 after crystallization after heat storage.

[0034] Figure 2 This is a product state diagram of the suspension provided in Comparative Example 2 after crystallization after heat storage.

[0035] Figure 3 This is a product state diagram of the suspension provided in Comparative Example 3 that becomes paste-like after heat storage.

[0036] Figure 4 This is a product state diagram of the suspension provided in Comparative Example 4, which becomes a paste after heat storage.

[0037] Figure 5 This is a product status diagram of the suspension provided in Comparative Example 5, in which crystals of the original drug precipitate after hot storage.

[0038] Figure 6The water separation state diagram of the suspension product after hot storage provided for Example 1, Comparative Examples 7 and 8 corresponds to Example Comparative Example 8, Comparative Example 7 and Example 1 from left to right respectively.

[0039] Figure 7 , Figure 8 The graphs of the particle size change of the suspension after hot storage provided by Example 1 and Comparative Example 5 are respectively. DETAILED DESCRIPTION

[0040] Example 1

[0041] Embodiment 1 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate, which comprises, by weight percentage, 10% of cyromazine technical drug, 30% of cyantraniliprole technical drug, 14% of dispersant, 2% of wetting agent, 0.75% of thickener, 0.5% of pH regulator, 4% of antifreeze agent, 0.05% of defoamer, 0.15% of preservative, and the balance is made up of deionized water.

[0042] The dispersant is a combination of a carboxylate dispersant, a phosphate dispersant and an EO / PO block polyether, and the mass ratio of the acrylic ester copolymer, the alkyl aryl polyether polyol phosphate and the EO / PO block polyether is 3:3:1.

[0043] The carboxylate dispersant is an acrylate copolymer, specifically AGRILAN 788 (Nouryon); the phosphate dispersant is an alkyl aryl polyether polyol phosphate, specifically sp-3060 (Qingyu Chemical), and the average molecular weight of the EO / PO block polyether is 5400, specifically Ethylan 324 (Nouryon).

[0044] The wetting agent is polycarboxylate, specifically SP-27001 (Qingyu Chemical).

[0045] The pH adjuster is citric acid.

[0046] The antifreeze agent is propylene glycol.

[0047] The thickener is selected from a combination of attapulgite and xanthan gum. The mass ratio of the attapulgite to the xanthan gum is 4:1. The attapulgite is specifically FG (Adif, hydrated magnesium-rich aluminum silicate).

[0048] The defoaming agent is an organosilicon defoaming agent, specifically polydimethylsiloxane (SAG 1572).

[0049] The preservative is an isothiazolinone derivative, specifically benzisothiazoline-3-one (BIT 20).

[0050] On the other hand, Example 1 of the present invention provides a method for preparing a cyromazine-cyantraniliprole suspension concentrate, which specifically comprises the following steps:

[0051] (1) Deionized water, a wetting agent, a dispersant, 33 wt% of a defoaming agent, and a pH adjuster are placed in a shear pot for shearing and dispersion to obtain a dispersion A; xanthan gum and an antifreeze agent are mixed to obtain a mixed solution B;

[0052] (2) Then, the cyromazine technical and cyantraniliprole technical were added into the dispersion A, and after shearing and dispersing evenly, attapulgite and 33 wt % of the mixed solution B were added, and after shearing and dispersing for 30 min, 33 wt % of the defoamer was added, and then the mixture was sand-milled using a nano sand mill;

[0053] (3) The particle size D90 is controlled to be less than 0.5 μm during sand milling. After the sand milling, samples are taken for wet screening test. After the wet screening test is qualified, the remaining defoamer, preservative and the remaining mixed solution B are added, and the mixture is obtained after shear dispersion for 30 minutes.

[0054] Comparative Example 1

[0055] Comparative Example 1 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that the dispersant is replaced by a sulfonate dispersant (Fangzhong Chemical DS539).

[0056] Comparative Example 2

[0057] Comparative Example 2 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the dispersant is replaced by a combination of an acrylate copolymer (AGRILAN 788, Nouryon) and an EO / PO block polyether (Ethylan 324, Nouryon), and the mass ratio of the acrylate copolymer to the EO / PO block polyether is 6:1.

[0058] Comparative Example 3

[0059] Comparative Example 3 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the dispersant is a combination of an alkyl aryl polyether polyol phosphate and an EO / PO block polyether, and the mass ratio of the alkyl aryl polyether polyol phosphate (SP-3060, Qingyu Chemical) and the EO / PO block polyether (Ethylan 324, Nouryon) is 6:1.

[0060] Comparative Example 4

[0061] Comparative Example 4 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the dispersant is a combination of an acrylate copolymer (AGRILAN 788, Nouryon) and an alkyl aryl polyether polyol phosphate (SP-3060, Qingyu Chemical), and the mass ratio of the acrylate copolymer to the alkyl aryl polyether polyol phosphate is 1:1.

[0062] Comparative Example 5

[0063] Comparative Example 5 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the average molecular weight of the EO / PO block polyether is 4000, specifically Ethylan Ns-5001q, Nouryon.

[0064] Comparative Example 6

[0065] Comparative Example 6 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that the pH regulator is replaced by glacial acetic acid.

[0066] Comparative Example 7

[0067] Comparative Example 7 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof. The specific implementation manner is the same as that of Example 1, except that the attapulgite is specifically a Guoxing brand special new green anti-settling and thickening aid (Guoxing attapulgite).

[0068] Comparative Example 8

[0069] Comparative Example 8 of the present invention provides a cyromazine-cyantraniliprole suspension concentrate and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that the thickener is replaced by a combination of aluminum magnesium silicate and xanthan gum in a mass ratio of 4:1.

[0070] Contrast 9

[0071] Comparative Example 9 of the present invention provides a cyromazine·cyantraniliprole suspension concentrate and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that the preparation method of the cyromazine·cyantraniliprole suspension concentrate specifically comprises the following steps:

[0072] (1) Deionized water, a wetting agent, a dispersant, 33 wt% of a defoaming agent, and a pH adjuster are placed in a shear pot for shearing and dispersion to obtain a dispersion A; xanthan gum and an antifreeze agent are mixed to obtain a mixed solution B;

[0073] (2) Then, the cyromazine technical and cyantraniliprole technical were added into the dispersion A, and after shearing and dispersing evenly, attapulgite and 33 wt % of the mixed solution B were added, and after shearing and dispersing for 30 min, 33 wt % of the defoamer was added, and then the mixture was sand-milled using a nano sand mill;

[0074] (3) The particle size D90 is controlled to be 3.5 μm during sand milling. After the sand milling, a sample is taken for wet screening test. After the wet screening test is qualified, the remaining defoamer, preservative and the remaining mixed solution B are added, and the mixture is obtained after shear dispersion for 30 minutes.

[0075] Performance Testing Methods

[0076] 1. The suspending agent products provided in the examples and comparative examples were tested for physical and chemical properties. The test items, test methods or reference standards and test results are shown in Tables 1, 2, Figure 1-8 .

[0077] Table 1

[0078]

[0079]

[0080] Table 2

[0081]

[0082]

[0083] Note: The normal temperature in Tables 1 and 2 is 25±2°C, and " / " indicates that the corresponding item was not measured or there is no specified indicator for the corresponding item. 2. Field efficacy tests were conducted on the products provided in Example 1 and Comparative Example 9.

[0084] Test name: Field efficacy test of 450 g / L cyromazine-cyantraniliprole suspension against cucumber leafminer

[0085] Test crop: cucumber

[0086] Control target: Liriomyza sativae

[0087] Test agent: 450 g / L cyromazine-cyantraniliprole suspension

[0088] Trial start time: August 10, 2023

[0089] Trial completion time: August 20, 2023

[0090]

[0091] Application method and water usage (liters / hectare):

[0092] Application method: normal spray. Water consumption: 675 liters / hectare (45 liters / mu).

[0093] Test results:

[0094]

[0095] in conclusion:

[0096] According to the occurrence of pests, it is recommended to apply the pesticide once during the early larval stage of the cucumber leafminer; the dosage of the active ingredient is 27-54 grams / hectare (relative to the amount of pesticide provided in comparative example 9, which reduces environmental pollution). The test dose is safe for cucumber plants, has no symptoms of pesticide damage, and has no effect on non-target organisms and surrounding crops.

Claims

1. A cyromazine-cyantraniliprole suspension concentrate, characterized in that: Calculated by weight percentage, the composition includes: 5-20% of cyromazine technical, 20-40% of cyantraniliprole technical, 8-20% of dispersant, 1-5% of wetting agent, 0.1-2% of thickener, 0.1-1% of pH regulator, 1-8% of antifreeze agent, 0.01-0.5% of defoamer, 0.01-0.5% of preservative, and the balance is made up of deionized water.

2. The cyromazine-cyantraniliprole suspension concentrate according to claim 1, characterized in that The mass ratio of the cyromazine technical drug to the cyantraniliprole technical drug is 1:(2-4).

3. The cyromazine-cyantraniliprole suspension concentrate according to claim 1 or 2, characterized in that: The dispersant contains at least one of a sulfonate dispersant, a phosphate dispersant, and a carboxylate dispersant.

4. The cyromazine-cyantraniliprole suspension concentrate according to claim 3, characterized in that: The dispersant at least includes a carboxylate dispersant and a phosphate dispersant, and the carboxylate dispersant is a modified carboxylate polymer.

5. A cyromazine-cyantraniliprole suspension concentrate according to claim 3, characterized in that: The dispersant also includes EO / PO block polyether.

6. A cyromazine-cyantraniliprole suspension concentrate according to claim 3, characterized in that: The wetting agent is selected from at least one of polycarboxylates, alkyl naphthalene sulfonates, fatty alcohol polyoxyethylene ethers, and sodium lauryl sulfate.

7. A cyromazine-cyantraniliprole suspension concentrate according to claim 3, characterized in that: The pH regulator is selected from at least one of citric acid, glacial acetic acid, phosphoric acid, sodium citrate, and ammonia water; and the antifreeze agent is selected from at least one of ethylene glycol, propylene glycol, glycerol, and sodium chloride.

8. A cyromazine-cyantraniliprole suspension concentrate according to claim 3, characterized in that: The thickener is selected from at least one of magnesium aluminum silicate, attapulgite and xanthan gum.

9. The cyromazine-cyantraniliprole suspension concentrate according to claim 3, characterized in that: The defoaming agent is an organosilicon defoaming agent, and the preservative is an isothiazolinone derivative.

10. A method for preparing the cyromazine-cyantraniliprole suspension concentrate according to any one of claims 1 to 9, characterized in that: At least the following steps are included: (1) putting deionized water, a wetting agent, a dispersant, 30-40 wt% of a defoaming agent, and a pH adjuster into a shear pot for shearing and dispersion to obtain a dispersion A; (2) Then, the cyromazine technical drug and cyantraniliprole technical drug are added into the dispersion A, and after shearing and dispersing evenly, a thickener and an antifreeze agent are added, and after further shearing and dispersing, 30-40 wt % of a defoamer is added, and then sand milling is performed using a sand mill; (3) After the sand milling is completed, samples are taken for wet screening test. After the wet screening test is qualified, the remaining defoaming agent and preservative are added, and the product is obtained after shearing and dispersion.

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