Sulfiflumin-containing acaricidal composition and application thereof

Abstract

The invention belongs to the technical field of pesticide mite killing, and discloses a sulfiflumin-containing mite killing composition and application thereof, the mite killing composition comprises an active component A and an active component B, the active component A is sulfiflumin, the active component B is any one of clofentezine, flutenzine, hexythiazox and propargite, and the mass ratio of the active component A to the active component B is 1: 52-56: 1. The acaricidal composition disclosed by the invention has a remarkable control effect on citrus red mites, the harm of harmful mites to plants is reduced, and the development of drug resistance of the harmful mites is slowed down.

Description

[0001] This divisional application of the present invention has the application number 202311527884.1, the filing date of November 16, 2023, and the invention title of "A miticide composition containing sulfiflumin and its uses". Technical Field

[0002] The present invention belongs to the technical field of pesticide miticides, and specifically relates to a miticide composition containing sulfiflumin and its uses. Background Art

[0003] Panonychus citri is one of the main pests of citrus fruit trees. It overwinters with eggs and adult mites in branch cracks and on the back of leaf surfaces, and its development duration shortens with the increase in temperature. Because Panonychus citri has a fast reproduction rate, many generations, and strong drug resistance, it brings great difficulties to the prevention and control work. If the prevention and control effect is not ideal or not timely, many white dots will appear on the front of the damaged leaves, losing their luster. In severe cases, the leaves will turn completely pale, resulting in a large amount of defoliation, affecting photosynthesis. When the fruit is severely damaged, it will cause fruit drop, and the surface of the fruit will be grayish-white, affecting its quality and yield, and causing great economic impact on fruit farmers.

[0004] In recent years, due to the non-standard use of pesticides by farmers, the resistance of Panonychus citri to pesticides has become stronger and stronger, and the control effect of single agents has become worse and worse. Therefore, screening new miticides with high efficiency and low toxicity for controlling Panonychus citri is still an urgent problem to be solved in current citrus production. Through experimental research, the applicant found that a reasonable compounding of sulfiflumin with any one of clofentezine, flufenzine, hexythiazox, or propargite has a dual action mechanism, and has a better control effect compared with single agents and is not prone to drug resistance. Summary of the Invention

[0005] Based on the above content, the purpose of the present invention is to provide a miticide composition containing sulfiflumin that has an excellent control effect on harmful mites. The miticide composition or its preparation can significantly enhance the drug effect, has good quick-acting property, long-lasting effect, is safe for a variety of plants and target organisms, can effectively reduce the usage amount of pesticides, reduce production costs, and reduce environmental pollution.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: A miticide composition containing sulfiflumin, the active ingredients of the miticide composition include active ingredient A and active ingredient B, the active ingredient A is sulfiflumin, and the active ingredient B is any one of clofentezine, flufenzine, hexythiazox, or propargite;

[0007] Furthermore, the mass ratio of active ingredient A to active ingredient B in the miticide composition is 1:52 to 56:1.

[0008] Further, the active ingredient B is clofentezine, and the mass ratio of the active ingredient A to the active ingredient B is 1:26 to 48:1;

[0009] Furthermore, the active ingredient B is clofentezine, and the mass ratio of the active ingredient A to the active ingredient B is 1:13 to 32:1;

[0010] Further, the active ingredient B is flufenzine, and the mass ratio of the active ingredient A to the active ingredient B is 1:25 to 40:1;

[0011] Furthermore, the active ingredient is flufenzine, and the mass ratio of the active ingredient A to the active ingredient B is 1:12 to 20:1;

[0012] Further, the active ingredient B is hexythiazox, and the mass ratio of the active ingredient A to the active ingredient B is 1:45 to 35:1;

[0013] Furthermore, the active ingredient B is hexythiazox, and the mass ratio of the active ingredient A to the active ingredient B is 1:35 to 25:1;

[0014] Further, the active ingredient B is propargite, and the mass ratio of the active ingredient A to the active ingredient B is 1:40 to 20:1;

[0015] Furthermore, the active ingredient B is propargite, and the mass ratio of the active ingredient A to the active ingredient B is 1:30 to 10:1;

[0016] Further, in addition to the active ingredient, the acaricidal composition also contains auxiliary ingredients, and the auxiliary ingredients are one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreezing agents, defoaming agents, solvents, preservatives, stabilizers, synergists, binders, fillers or carriers.

[0017] Further, the acaricidal composition can be prepared into a preparation dosage form permitted in pesticides, and the preparation dosage form is a suspension concentrate, wettable powder, water dispersible granule, emulsion in water, emulsifiable concentrate, emulsifiable concentrate or microemulsion.

[0018] Furthermore, the preparation dosage form is a suspension concentrate, wettable powder, water dispersible granule.

[0019] The present invention also discloses the use of the acaricidal composition as described above for controlling harmful mites.

[0020] Further, the harmful mites are agricultural, forestry or storage harmful mites.

[0021] Furthermore, the harmful mites are Tetranychus urticae, Tetranychus cinnabarinus, Panonychus citri;

[0022] Further, the mite to be killed is the citrus red mite.

[0023] Further, the acaricidal composition is applied to mites and the medium where mites occur.

[0024] The beneficial effects of the present invention are as follows:

[0025] (1) The acaricidal composition of the present invention combines compounds with different action mechanisms, and has an obvious synergistic effect on mites.

[0026] (2) Compared with single agents, the acaricidal composition of the present invention reduces the dosage of pesticides, reduces production costs and reduces the environmental pollution of pesticides at the same time.

[0027] (3) The acaricidal composition of the present invention slows down the generation of mite resistance, is safe for crops and other non-target organisms, reduces the pesticide residues in agricultural products, and is safe and efficient. Specific Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the preparation examples and specific examples of the preparation of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0029] Preparation Examples of Preparations:

[0030] Preparation Example 1: 12% sulfiflumin·clofentezine suspension concentrate (1:5)

[0031] Formulation composition: 2% sulfiflumin, 10% clofentezine, 1% Guerbet alcohol polyoxyethylene ether, 3% alkylphenol polyoxyethylene ether phosphate, 1% sodium polycarboxylate, 0.25% xanthan gum, 5% glycerol, 1% sodium sorbate, 0.5% silicone oil, deionized water to make up the balance;

[0032] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional auxiliaries are placed in a reaction kettle in sequence, mixed evenly with water, subjected to high-speed shearing and wet grinding, and finally homogenized and filtered to obtain the suspension concentrate product.

[0033] Preparation Example 2: 20% sulfiflumin·clofentezine wettable powder (1:1)

[0034] Formulation composition: 10% sulfiflumin, 10% clofentezine, 8% sodium lignosulfonate, 2% sodium dodecyl sulfate, 5% dispersant NNO, 5% silica white, kaolin to make up the balance;

[0035] Preparation method: According to the formulation composition, the active ingredient, dispersant, wetting agent and filler are mixed, stirred evenly in a stirring kettle, and pulverized and mixed evenly by an air flow pulverizer for multiple times to obtain the wettable powder of the composition of the present invention.

[0036] Preparation Example 3: 27% sulfiflumin·tetradifon water dispersible granule (8:1)

[0037] Formulation composition: 24% sulfiflumin, 3% tetradifon, 6% sodium lignosulfonate, 3% Nekal BX, 10% naphthalene sulfonic acid formaldehyde condensate, 5% white sugar, kaolin to make up the balance.

[0038] Preparation method: According to the formulation ratio, the active ingredient is added to the carrier, and surfactants and other functional auxiliaries are added thereto, mixed, 10-25% of water is added after air flow pulverization, and then the water dispersible granule product is obtained through kneading, granulation, drying and screening; or the pulverized powder is sprayed with water, granulated and dried in a fluidized bed granulator, and then screened to obtain the water dispersible granule product.

[0039] Preparation Example 4: 18% sulfiflumin·flufenzine suspension (5:1)

[0040] Formulation composition: 15% sulfiflumin, 3% flufenzine, 2% gerb alcohol polyoxyethylene ether, 2% alkylaryl polyoxyethylene ether polyoxypropylene ether, 3% triphenylvinylphenol ethoxylate phosphate, 1% sodium polycarboxylate, 1.5% magnesium aluminum silicate, 0.1% carboxyethyl cellulose, 0.5% potassium benzisothiazolinone, 5% glycerol, 0.5% silicone oil, deionized water to make up the balance;

[0041] Preparation method: The same as Preparation Example 1.

[0042] Preparation Example 5: 25% sulfiflumin·flufenzine wettable powder (1:4)

[0043] Formulation composition: 5% sulfiflumin, 20% flufenzine, 8% calcium lignosulfonate, 2% sodium dodecyl sulfate, 5% sodium polycarboxylate salt, 5% white carbon black, kaolin to make up the balance;

[0044] Preparation method: The same as Preparation Example 2.

[0045] Preparation Example 6: 20% sulfiflumin·flufenzine water dispersible granule (1:9)

[0046] Formulation composition: 2% sulfiflumin, 18% flufenzine, 10% lignosulfonate, 8% naphthalene sulfonate formaldehyde condensate, 2% sodium dodecyl sulfate, 5% white carbon black, 30% starch, kaolin to make up the balance.

[0047] Preparation method: The same as Preparation Example 3.

[0048] Preparation Example 7: 24% sulfiflumin · pyridaben wettable powder (1.5:22.5)

[0049] Formulation composition: 1.5% sulfiflumin, 22.5% pyridaben, 8% sodium lignosulfonate, 6% dispersant NNO, 2% sodium dodecyl sulfate, kaolin to make up the balance;

[0050] Preparation method: The same as Preparation Example 2.

[0051] Preparation Example 8: 12% sulfiflumin · pyridaben emulsifiable concentrate (1:1)

[0052] Formulation composition: 6% sulfiflumin, 6% pyridaben, 20% propylene glycol methyl ether, 12% alkylaryl polyoxyethylene polyoxypropylene ether, 3% calcium dodecylbenzenesulfonate, 10% DMF, methyl oleate to make up the balance;

[0053] Preparation method: According to the formulation ratio, the metered active ingredients, solvents, and cosolvents are added to a blending kettle and stirred to dissolve them. Then, emulsifiers are added, and the balance is made up with the remaining solvent. After stirring evenly in a stirring kettle and filtering, the emulsifiable concentrate required by the present invention is obtained.

[0054] Preparation Example 9: 18% sulfiflumin · pyridaben emulsion in water (5:1)

[0055] Formulation composition: 15% sulfiflumin, 3% pyridaben, 6% fatty alcohol polyoxyethylene polyoxypropylene ether, 2% fatty alcohol polyoxyethylene ether sulfate, 12% cyclohexanone, 0.25% xanthan gum, 5% glycerol, 1% sodium sorbate, deionized water to make up the balance;

[0056] Preparation method: According to the formulation ratio, the active ingredients are added together with solvents, emulsifiers, and cosolvents to dissolve them into a uniform oil phase; part of the water, antifreeze agents, and other pesticide adjuvants are mixed together to form a uniform water phase; while stirring at high speed in a reaction kettle, the oil phase is added to the water phase and sheared for about half an hour to form an oil-in-water type emulsion in water.

[0057] Preparation Example 10: 13% sulfiflumin · pyridaben microemulsion (12:1)

[0058] Formulation composition: 12% sulfiflumin, 1% pyridaben, 2% alkylphenol polyoxyethylene ether, 15% triphenylvinylphenol polyoxyethylene ether, 2% fatty alcohol polyoxyethylene ether phosphate salt, 10% cyclohexanone, 0.5% penetrant JFC, 5% ethylene glycol, deionized water to make up the balance;

[0059] Preparation method: According to the formulation composition, stir and mix the active ingredient, organic solvent, surfactant, co-surfactant and other auxiliaries evenly to form an oil phase, and then add the aqueous phase, and slightly stir and shear to obtain a microemulsion.

[0060] Preparation Example 11: 20% sulfiflumin·hexythiazox suspension concentrate (3:1)

[0061] Formulation composition: 15% sulfiflumin, 5% hexythiazox, 2% block polyether, 5% styrylphenol polyoxyethylene ether phosphate, 1% sodium lignosulfonate, 1% isomeric tridecyl alcohol polyoxyethylene ether, 0.2% xanthan gum, 5% ethylene glycol, 0.3% sodium benzoate, 1% silicone defoamer, deionized water to make up the balance;

[0062] Preparation method: The same as Preparation Example 1.

[0063] Preparation Example 12: 22% sulfiflumin·propargite emulsifiable concentrate (7:15)

[0064] Formulation composition: 7% sulfiflumin, 15% propargite, 18% N-methylpyrrolidone, 12% alkylaryl polyoxyethylene ether polyoxypropylene ether, 3% calcium dodecylbenzenesulfonate, 8% DMF, methyl oleate to make up the balance;

[0065] Preparation method: The same as Preparation Example 8.

[0066] Preparation Example 13: 21% sulfiflumin·propargite wettable powder (1:20)

[0067] Formulation composition: 1% sulfiflumin, 20% propargite, 5% sodium lignosulfonate, 4% dispersant NNO, 2% sodium succinate sulfonate, 30% silica, kaolin to make up the balance;

[0068] Preparation method: According to the formulation composition, mix propargite and silica evenly, then mix the active ingredient and dispersant, wetting agent and filler, stir evenly in a stirring kettle, and carry out multiple pulverizations and mix evenly by an air flow pulverizer to prepare the wettable powder of the composition of the present invention.

[0069] Preparation Example 14: 13% sulfiflumin·propargite emulsion in water (1:12)

[0070] Formulation composition: 1% sulfiflumin, 12% propargite, 15% acetophenone, 8% alkylaryl polyoxyethylene ether polyoxypropylene ether, 2% styrylphenol polyoxyethylene ether phosphate, 0.2% xanthan gum, 5% glycerol, 0.2% sodium benzoate, deionized water to make up the balance.

[0071] Preparation method: the same as that of Preparation Example 9.

[0072] Preparation Example 15: 22% sulfiflumin·propargite microemulsion (10:1)

[0073] Formulation composition: 20% sulfiflumin, 2% propargite, 10% triphenylethylphenol polyoxyethylene ether, 5% cyclohexanone, 8% xylene, 1% sodium dodecylbenzenesulfonate, 4% ethylene glycol, 3% sorbitan polyoxyethylene ether, deionized water to make up the balance;

[0074] Preparation method: the same as that of Preparation Example 10.

[0075] Example 1: Indoor biological test

[0076] Test basis: The test was carried out with reference to NY / T 1154.12-2008 Guidelines for Pesticide Bioassay in the Laboratory - Part 12: Slide-dip Method for Tetranychidae.

[0077] Test target: Panonychus citri McGregor.

[0078] Test preparation: Cut the double-sided tape into 2 cm long pieces and stick one end to the slide. Select healthy mites and stick their backs to the double-sided tape (do not stick the mite legs, antennae and mouthparts). Place 30 mites on each slide and put them into a container padded with a wet sponge. Cover the container and place it under the condition of 25±1°C. After 2 h, examine the mites under a microscope and remove the dead and injured individuals, and make up to 30 mites per slide.

[0079] Agent preparation: Dissolve the test agents with a suitable solvent, and prepare 5 series of mass concentration gradients for each single agent and the mixed agents of each ratio according to the mixing purpose and agent activity design.

[0080] Agent treatment: Immerse the slide in the liquid medicine and gently shake for 5 s, then take it out, absorb the excess liquid medicine with filter paper, place it in a white porcelain dish padded with a wet sponge, and cover it with a plastic film with good light transmittance. Each treatment has 4 replicates, and a treatment without agent (including all organic solvents and emulsifiers) is set as a blank control.

[0081] Rearing and observation: Place the container with the test insects under the conditions of (25±1)°C and a photoperiod of L:D=(16:8) h for rearing and observation.

[0082] Test investigation: Examine the mites under a microscope 48 h after treatment to check the death situation of the test insects, and record the total number of insects and the number of dead insects respectively.

[0083] Use DPS data processing software to process the data, calculate the virulence regression equation, correlation coefficient, LC 50 value, and compare the virulence of the LC 50 values of each treatment.

[0084] Calculate the mortality rate of each treatment based on the survey data. Calculate according to the following formula:

[0085]

[0086] In the formula:

[0087] P - Mortality rate, unit is percentage (%).

[0088] K - Represents the number of dead insects, unit is head.

[0089] N - Represents the total number of insects in the treatment, unit is head.

[0090]

[0091] In the formula:

[0092] P1 - Corrected mortality rate, unit is percentage (%).

[0093] P t - Mortality rate of the treatment, unit is percentage (%).

[0094] P0 - Mortality rate of the blank control, unit is percentage (%).

[0095] If the mortality rate of the control < 5%, no correction is required; if the mortality rate of the control is between 5% and 20%, correction should be made according to formula (2); if the mortality rate of the control > 20%, the test needs to be redone.

[0096] The co-toxicity coefficient (CTC value) of the mixture is calculated according to formulas (3), (4), and (5):

[0097]

[0098] In the formula:

[0099] ATI - Measured toxicity index of the mixture;

[0100] S - LC of the standard acaricide 50 , unit is milligram per liter (mg / L);

[0101] M - LC of the mixture 50 , unit is milligram per liter (mg / L).

[0102] TTI = TI A ×P A +TI B ×P B

[0103] In the formula:

[0104] TTI - Theoretical toxicity index of the mixture;

[0105] TI A —— Toxicity index of agent A;

[0106] P A —— Percentage content of agent A in the mixture, in percentage (%);

[0107] TI B —— Toxicity index of agent B;

[0108] P B —— Percentage content of agent B in the mixture, in percentage (%).

[0109]

[0110] Where:

[0111] CTC —— Co-toxicity coefficient;

[0112] ATI —— Measured toxicity index of the mixture;

[0113] TTI —— Theoretical toxicity index of the mixture.

[0114] When the co-toxicity coefficient CTC of the compounding is ≥ 120, it shows a synergistic effect; when CTC ≤ 80, it shows an antagonistic effect; when 80 < CTC < 120, it shows an additive effect.

[0115] The results of the indoor toxicity test are shown in the following table:

[0116] Table 1 Results of the indoor bioactivity test of the compound of sulfiflumin and clofentezine against Panonychus citri

[0117]

[0118]

[0119] It can be seen from the results of the indoor bioactivity test (Table 1) that compounding sulfiflumin and clofentezine has excellent control effects against Panonychus citri at a certain mass ratio. When the mass ratio of sulfiflumin to clofentezine is 1:26 to 48:1, the co-toxicity coefficient against Panonychus citri is greater than 120, showing a synergistic effect. Among them, when the mass ratio of the two is 1:3, its LC 50 for Panonychus citri is 3.4246 mg / L, the co-toxicity coefficient is the largest, being 186.911, and the synergistic effect is significant; while when the mass ratio of the two is 1:52 and 56:1, the co-toxicity coefficient is less than 120, showing an additive effect.

[0120] Table 2 Indoor bioactivity test of the compound of sulfiflumin and flufenzine against Panonychus citri

[0121]

[0122] It can be seen from the results of the indoor bioactivity test (Table 2) that the compounding of sulfiflumin and flufenzine has a good control effect on Panonychus citri at a certain mass ratio. The compounding mass ratio of sulfiflumin and flufenzine from 1:25 to 40:1 shows a synergistic effect on Panonychus citri. Among them, when the mass ratio of the two is 1:8, the LC 50 for Panonychus citri is 2.9623 mg / L, and the co-toxicity coefficient is up to 197.792, with a significant synergistic effect; while when the mass ratio of the two is 1:50 to 1:32 and 50:1, the co-toxicity coefficient is less than 120, showing an additive effect.

[0123] Table 3 Indoor bioactivity test of the compounding of sulfiflumin and hexythiazox against Panonychus citri

[0124]

[0125]

[0126] It can be seen from the results of the indoor bioactivity test (Table 3) that the compounding of sulfiflumin and hexythiazox has a good control effect on Panonychus citri at a certain mass ratio. The compounding mass ratio of sulfiflumin and hexythiazox from 1:45 to 35:1 shows a synergistic effect on Panonychus citri. Among them, when the mass ratio of the two is 1:5, the LC 50 for Panonychus citri is 4.4257 mg / L, and the co-toxicity coefficient is up to 188.375, with a significant synergistic effect; while when the mass ratio is 45:1, the co-toxicity coefficient is less than 120, showing an additive effect.

[0127] Table 4 Indoor bioactivity test of the compounding of sulfiflumin and propargite against Panonychus citri

[0128]

[0129] It can be seen from the results of the indoor bioactivity test (Table 4) that the compounding of sulfiflumin and propargite has a good control effect on Panonychus citri at a certain mass ratio. The compounding mass ratio of sulfiflumin and propargite from 1:40 to 20:1 shows a synergistic effect on Panonychus citri. Among them, when the mass ratio of the two is 1:15, the LC 50 for Panonychus citri is 14.9513 mg / L, and the co-toxicity coefficient is up to 213.314, with a significant synergistic effect; while when the mass ratio of the two is 30:1 to 40:1, the co-toxicity coefficient is less than 120, showing an additive effect.

[0130] Example 2: Field efficacy test

[0131] Test site: The test site is located in the citrus orchard of Lijiazhai, Yongfu Town, Yongfu County, Guangxi. The soil texture of the test site is acidic tidal sandy soil, with medium to high fertility, flat terrain, and convenient drainage and irrigation.

[0132] Test crop: Citrus (Nanfeng tangerine), 5 years old, with good growth.

[0133] Test design: According to the guidelines for field efficacy trials of pesticides, 9 treatment groups of pesticides and a blank control were set up, with a total of 10 treatments. Each treatment was replicated 4 times, resulting in a total of 40 plots. The plots were arranged in a randomized block design, with 2 citrus trees in each plot. During the peak occurrence period of citrus red spider mites, the crowns of the trees were sprayed using a WS-16 type knapsack manual sprayer with a single hollow conical nozzle, and the working pressure was 0.2 - 0.4 mpa. Spraying was carried out according to the application rates specified in the test design to ensure that both the front and back sides of the leaves were fully covered with the pesticide.

[0134] Investigation method: The initial population density of pests was investigated before pesticide application. Investigations were carried out 3, 15, and 30 days after pesticide application. In each plot, 2 trees were investigated. For each tree, 5 leaves were randomly selected from the east, south, west, north, and middle directions, and the number of live mites on both the front and back sides of the leaves was examined to calculate the control efficacy.

[0135] Calculation method of efficacy:

[0136]

[0137] Results and analysis of field efficacy trials:

[0138] Table 5 Results of field efficacy trials

[0139]

[0140] Impact on crop safety: After observation, all the test pesticides were safe for citrus, and no phytotoxicity was observed after application. The growth of citrus was normal.

[0141] Impact on other pests and diseases: No other pests were observed during the test period, and no obvious adverse effects of the test pesticides on natural enemies and other organisms were found.

[0142] As can be seen from Table 5, 3 days after treatment, the control effects of 9 acaricides on Panonychus citri were 55.11% - 91.30%. Among them, the control effects of 20% sulfiflumin·clofentezine wettable powder (1:1), 18% sulfiflumin·flufenzine suspension concentrate (5:1), 12% sulfiflumin·hexythiazox emulsifiable concentrate (1:1), and 13% sulfiflumin·propargite emulsion in water (1:12) were 88.17%, 91.30%, 86.66%, and 85.17% respectively, which were significantly higher than those of 20% clofentezine suspension concentrate, 36% flufenzine suspension concentrate, 5% hexythiazox emulsifiable concentrate, 30% propargite wettable powder, and 20% sulfiflumin suspension concentrate. 15 days after treatment, the control effects of all 9 acaricides increased compared with those 3 days after treatment. The control effects of 20% sulfiflumin·clofentezine wettable powder (1:1), 18% sulfiflumin·flufenzine suspension concentrate (5:1), 12% sulfiflumin·hexythiazox emulsifiable concentrate (1:1), and 13% sulfiflumin·propargite emulsion in water (1:12) were all above 92%. 15 days after treatment, the control effects of 20% sulfiflumin·clofentezine wettable powder (1:1), 18% sulfiflumin·flufenzine suspension concentrate (5:1), and 12% sulfiflumin·hexythiazox emulsifiable concentrate (1:1) were all above 92%.

[0143] In summary, the acaricidal compositions of each treatment all showed good fast-acting and long-lasting effects, and had good safety, so they could be used for the control of Panonychus citri in production.

[0144] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of the present invention claimed.

Claims

1. A miticidal composition containing sulfiflumin, characterized in that, The active ingredients of the acaricidal composition described above include active ingredient A and active ingredient B. The active ingredient A is sulfiflumin, and the active ingredient B is flufenzine.

2. The acaricidal composition according to claim 1, wherein, In the acaricidal composition described above, the mass ratio of active ingredient A to active ingredient B is 1:52 to 56:

1.

3. The acaricidal composition according to claim 1, characterized in that, The mass ratio of active ingredient A to active ingredient B is 1:25 to 40:1, preferably 1:12 to 20:

1.

4. The acaricidal composition according to claim 1, characterized in that, In addition to the active ingredients, the acaricidal composition described above further includes auxiliary ingredients, which are one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreezing agents, defoaming agents, solvents, preservatives, stabilizers, synergists, binders, fillers or carriers.

5. The acaricidal composition according to claim 1, characterized in that, The acaricidal composition described above can be prepared into preparation dosage forms permitted in pesticides. The preparation dosage forms are suspension concentrates, wettable powders, water dispersible granules, emulsifiable concentrates, emulsions in water or microemulsions.

6. The acaricidal composition according to claim 5, characterized in that, The preparation dosage forms are suspension concentrates, wettable powders, water dispersible granules.

7. Use of the acaricidal composition according to any one of claims 1-6 for controlling harmful mites.

8. The use according to claim 7, characterized in that, The harmful mites are agricultural, forestry or storage harmful mites.

9. The use according to claim 8, wherein The harmful mites are Tetranychus urticae, Tetranychus cinnabarinus and / or Panonychus citri; preferably Panonychus citri.

10. The use according to claim 7, characterized in that, Apply the acaricidal composition described above to harmful mites and the medium where harmful mites occur.

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