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 invention application is a divisional application with application number 202311527884.1, application date November 16, 2023, and invention name “A sulfiflumin-containing acaricidal composition and its use”. Technical Field

[0002] The invention belongs to the technical field of pesticide acaricide, and particularly relates to a sulfiflumin-containing acaricide composition and application thereof. Background Art

[0003] Citrus spider mites are a major pest of citrus trees. They overwinter as eggs and adults in branch cracks and on the undersides of leaves, with their developmental period shortening with rising temperatures. Their rapid reproduction, high number of generations, and strong pesticide resistance make control extremely difficult. Ineffective or delayed control can cause numerous white spots to appear on the front of affected leaves, leading to a loss of luster and, in severe cases, a complete whitening. This can cause extensive leaf drop and impair photosynthesis. Severe fruit infestation can cause fruit drop, resulting in a grayish-white surface, affecting quality and yield, and significantly impacting fruit farmers' economic well-being.

[0004] In recent years, due to farmers' irregular use of pesticides, citrus spider mites have become increasingly resistant to pesticides, and the effectiveness of single pesticides has been declining. Therefore, identifying new, highly effective and low-toxic acaricides for controlling citrus spider mites remains a pressing challenge in citrus production. Through experimental research, the applicant discovered that a rational combination of sulfiflumin with any of clofentezine, fluazifop, hexythiazox, or propargite exhibits a dual mechanism of action, resulting in improved control effectiveness compared to single pesticides and less resistance to the development of pesticide resistance. Summary of the Invention

[0005] Based on the above, the object of the present invention is to provide a sulfiflumin-containing acaricidal composition having excellent control effects on harmful mites. The acaricidal composition or its preparation can significantly enhance the efficacy of the drug, has good rapidity of effect, a long lasting effect, is safe for a variety of plants and target organisms, and can effectively reduce the use of pesticides, lower production costs, and reduce pollution to the environment.

[0006] To achieve the above object, the present invention adopts the following technical solution: a sulfiflumin-containing acaricidal composition, wherein the active ingredients of the acaricidal composition include active ingredient A and active ingredient B, wherein the active ingredient A is sulfiflumin, and the active ingredient B is any one of clofentezine, fluazifop, hexythiazox, or propargite;

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

[0008] Furthermore, 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] Furthermore, the active ingredient B is fluazifop, 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 fluazifop, and the mass ratio of the active ingredient A to the active ingredient B is 1:12 to 20:1;

[0012] Furthermore, 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] Furthermore, 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] Furthermore, the acaricidal composition contains auxiliary ingredients in addition to the active ingredients, and the auxiliary ingredients are one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoaming agents, solvents, preservatives, stabilizers, synergists, binders, fillers or carriers.

[0017] Furthermore, the acaricidal composition can be prepared into a formulation form permitted in pesticides, and the formulation form is a suspension concentrate, wettable powder, water-dispersible granules, emulsion in water, emulsifiable concentrate, emulsifiable concentrate or microemulsion.

[0018] Furthermore, the formulation is in the form of a suspension, a wettable powder, or a water-dispersible granule.

[0019] The present invention also discloses use of the acaricidal composition for preventing and controlling harmful mites.

[0020] Furthermore, the pest mites are agricultural, forestry or storage pest mites.

[0021] Furthermore, the harmful mites are Tetranychus urticae, Tetranychus cinnabarinus, and Citrus red spider;

[0022] Furthermore, the harmful mite is citrus red spider.

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

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

[0025] (1) The acaricidal composition of the present invention is a compound of compounds with different mechanisms of action, which has a significant synergistic effect on harmful mites;

[0026] (2) Compared with a single-dose acaricide, the acaricide composition of the present invention reduces the dosage of the pesticide, thereby reducing production costs and reducing the environmental pollution caused by pesticides;

[0027] (3) The acaricide composition of the present invention slows down the development of drug resistance in harmful mites, is safe for crops and other non-target organisms, reduces pesticide residues in agricultural products, and is safe and efficient. DETAILED DESCRIPTION

[0028] The following will be combined with the preparation examples and specific embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Preparation example:

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

[0031] Formula composition: 2% sulfiflumin, 10% clofentazine, 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, and deionized water to make up the balance;

[0032] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in a reactor in sequence, water is added and mixed evenly, and the suspension product is obtained by high-speed shearing, wet sand grinding, and finally homogenization filtration.

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

[0034] Formula composition: 10% sulfiflumin, 10% clofentazine, 8% sodium lignin sulfonate, 2% sodium lauryl sulfate, 5% dispersant NNO, 5% white carbon black, kaolin makes up the balance;

[0035] Preparation method: According to the formula composition, the active ingredients, dispersants, wetting agents and fillers are mixed, uniformly stirred in a stirring kettle, and pulverized and mixed uniformly multiple times in a jet mill to prepare the wettable powder of the composition of the present invention.

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

[0037] Formula composition: 24% sulfiflumin, 3% clofentazine, 6% sodium lignin sulfonate, 3% lakai powder BX, 10% naphthalenesulfonic acid formaldehyde condensate, 5% white sugar, and kaolin makes up the balance.

[0038] Preparation method: According to the formula ratio, the active ingredient is added to the carrier, and surfactants and other functional additives are added thereto, mixed, and after air flow grinding, 10-25% water is added, and then kneading, granulation, drying, and screening are carried out to obtain water-dispersible granule products; or the ground powder is sprayed with water in a boiling granulator, granulated, dried, and then screened to obtain water-dispersible granule products.

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

[0040] Formula composition: 15% sulfiflumin, 3% flumethazine, 2% Guerbet alcohol polyoxyethylene ether, 2% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 3% tristyrylphenol ethoxylate phosphate, 1% sodium polycarboxylate, 1.5% magnesium aluminum silicate, 0.1% carboxyethyl cellulose, 0.5% potassium benzisothiazolinone, 5% glycerol, 0.5% silicone oil, and deionized water to make up the balance;

[0041] Preparation method: Same as Preparation Example 1.

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

[0043] Formula composition: 5% sulfiflumin, 20% flumethoxazine, 8% calcium lignin sulfonate, 2% sodium lauryl sulfate, 5% sodium polycarboxylate, 5% white carbon black, kaolin makes up the balance;

[0044] Preparation method: Same as Preparation Example 2.

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

[0046] Formula composition: 2% sulfiflumin, 18% flumethoxazine, 10% lignin sulfonate, 8% naphthalene sulfonate formaldehyde condensate, 2% sodium lauryl sulfate, 5% white carbon black, 30% starch, and kaolin as the balance.

[0047] Preparation method: Same as Preparation Example 3.

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

[0049] Formula composition: 1.5% sulfiflumin, 22.5% hexathiazolin, 8% sodium lignin sulfonate, 6% dispersant NNO, 2% sodium lauryl sulfate, and kaolin to make up the balance;

[0050] Preparation method: Same as Preparation Example 2.

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

[0052] Formula composition: 6% sulfiflumin, 6% hexathiazolin, 20% propylene glycol methyl ether, 12% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 3% calcium dodecylbenzenesulfonate, 10% DMF, and methyl oleate makes up the balance;

[0053] Preparation method: According to the formula ratio, the measured active ingredients, solvent and cosolvent are added to a mixing kettle and stirred to dissolve them, then the emulsifier is added and the balance is supplemented with the remaining solvent, and the mixture is stirred evenly in a stirring kettle. After filtering, the desired emulsifiable concentrate of the present invention is obtained.

[0054] Preparation Example 9: 18% sulfiflumin·hexythiazox aqueous emulsion (5:1)

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

[0056] Preparation method: Add the active ingredient with the solvent, emulsifier, and cosolvent according to the formula ratio to dissolve them into a uniform oil phase; mix part of the water, antifreeze agent and other pesticide adjuvants together to form a uniform aqueous phase; add the oil phase to the aqueous phase while stirring at high speed in a reactor, and shear for about half an hour to form an oil-in-water emulsion.

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

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

[0059] Preparation method: According to the formula composition, the active ingredients, organic solvents, surfactants, co-surfactants and other auxiliary agents are stirred and mixed evenly to form an oil phase, and then the water phase is added and slightly stirred and sheared to form a microemulsion.

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

[0061] Formula composition: 15% sulfiflumin, 5% hexythiazolin, 2% block polyether, 5% styrenated phenol polyoxyethylene ether phosphate, 1% sodium lignin sulfonate, 1% isomeric tridecyl alcohol polyoxyethylene ether, 0.2% xanthan gum, 5% ethylene glycol, 0.3% sodium benzoate, 1% silicone defoamer, and deionized water to make up the balance;

[0062] Preparation method: Same as Preparation Example 1.

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

[0064] Formula composition: 7% sulfiflumin, 15% propargyl methacrylate, 18% N-methyl pyrrolidone, 12% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 3% calcium dodecylbenzenesulfonate, 8% DMF, and methyl oleate makes up the balance;

[0065] Preparation method: Same as Preparation Example 8.

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

[0067] Formula composition: 1% sulfiflumin, 20% propargyl sulfonate, 5% sodium lignin sulfonate, 4% dispersant NNO, 2% sodium sulfosuccinate, 30% white carbon black, and kaolin makes up the balance;

[0068] Preparation method: According to the formula composition, propargyl methacrylate and white carbon black are mixed evenly, and then the active ingredient, dispersant, wetting agent and filler are mixed evenly, and the mixture is stirred evenly in a stirring kettle. The mixture is crushed and mixed evenly multiple times in a jet mill to prepare the wettable powder of the composition of the present invention.

[0069] Preparation Example 14: 13% sulfiflumin·propargyl aqueous emulsion (1:12)

[0070] Formula composition: 1% sulfiflumin, 12% cypermethrin, 15% acetophenone, 8% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 2% styrene phenol polyoxyethylene ether phosphate, 0.2% xanthan gum, 5% glycerol, 0.2% sodium benzoate, and deionized water to make up the balance.

[0071] Preparation method: Same as Preparation Example 9.

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

[0073] Formula composition: 20% sulfiflumin, 2% propargyl methacrylate, 10% triphenyl phenol polyoxyethylene ether, 5% cyclohexanone, 8% xylene, 1% sodium dodecylbenzene sulfonate, 4% ethylene glycol, 3% sorbitan polyoxyethylene ether, and deionized water to make up the balance;

[0074] Preparation method: Same as Preparation Example 10.

[0075] Example 1: Indoor biological test

[0076] Test basis: The test refers to NY / T 1154.12-2008 "Guidelines for Indoor Bioassay Tests of Pesticides - Insecticides Part 12: Spider Mite Slide Dipping Method".

[0077] Test target: Citrus red spider mite.

[0078] Experimental Preparation: Cut double-sided tape into 2 cm lengths and attach to one end of a glass slide. Select healthy mites and attach their backs to the tape (avoiding the legs, antennae, and mouthparts). Place 30 mites per slide in a container lined with a damp sponge, cover, and store at 25 ± 1°C. After 2 hours, examine under a microscope, remove dead and injured individuals, and replenish the remaining 30 mites per slide.

[0079] Preparation of pharmaceuticals: Dissolve the test pharmaceuticals in a suitable solvent, and prepare five series of mass concentration gradients for each single agent and each group of mixed agents according to the purpose of the mixture and the activity of the pharmaceutical.

[0080] Chemical treatment: Immerse the slide in the chemical solution and gently shake for 5 seconds. Remove the slide and remove the excess solution with filter paper. Place the slide on a white porcelain plate lined with a damp sponge and cover with a light-transmitting plastic film. Repeat four times for each treatment. A treatment without chemical (including all organic solvents and emulsifiers) serves as a blank control.

[0081] Rearing and observation: The container containing the test insects was placed at a temperature of (25±1)℃ and a photoperiod of L:D=(16:8)h for rearing and observation.

[0082] Experimental investigation: 48 hours after treatment, microscopic examination was conducted to check the death of test insects, and the total number of insects and the number of dead insects were recorded respectively.

[0083] DPS data processing software was used to process the data and calculate the toxicity regression equation, correlation coefficient, LC 50 values, and the LC of each treatment 50 The toxicity values ​​were compared.

[0084] Based on the survey data, calculate the mortality rate of each treatment using the following formula:

[0085]

[0086] Where:

[0087] P——mortality rate, in percentage (%);

[0088] K——indicates the number of dead insects, the unit is head;

[0089] N——represents the total number of insects processed, in heads.

[0090]

[0091] Where:

[0092] P1——adjusted mortality rate, in percentage (%);

[0093] P t ——Treatment mortality rate, expressed in percentage (%);

[0094] P0 - blank control mortality rate, in percentage (%).

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

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

[0097]

[0098] Where:

[0099] ATI - measured toxicity index of mixture;

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

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

[0102] TTI=TI A ×P A +TI B ×P B

[0103] Where:

[0104] TTI – Theoretical Toxicity Index of Mixtures;

[0105] TI A ——Agent toxicity index;

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

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

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

[0109]

[0110] Where:

[0111] CTC – Co-toxicity coefficient;

[0112] ATI - measured toxicity index of mixture;

[0113] TTI - Theoretical Toxicity Index of Mixture.

[0114] A co-toxicity coefficient (CTC) of 120 or higher indicates a synergistic effect; a co-toxicity coefficient (CTC) of 80 or lower indicates an antagonistic effect; and a co-toxicity coefficient (CTC) of 80 or lower indicates an additive effect.

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

[0116] Table 1 Results of indoor biological activity test on citrus red spider mite with sulfiflumin and clofentazine

[0117]

[0118]

[0119] The results of the indoor biological activity test (Table 1) show that the combination of sulfiflumin and clofentazine has an excellent control effect on citrus red spider mites at a certain mass ratio. When the mass ratio of sulfiflumin to clofentazine is 1:26 to 48:1, the co-toxicity coefficient against citrus red spider mites is greater than 120, showing a synergistic effect. When the mass ratio of the two is 1:3, the LC value against citrus red spider mites is 1. 50 It is 3.4246 mg / L, the co-toxicity coefficient is the largest, which is 186.911, and the synergistic effect is significant; 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 biological activity test of citrus red spider mite with sulfiflumin and flumethoxazine

[0121]

[0122] From the results of the indoor biological activity test (Table 2), it can be seen that the combination of sulfiflumin and flumethoxazine has a good control effect on citrus red spider mites at a certain mass ratio. The mass ratio of sulfiflumin to flumethoxazine is 1:25-40:1, which shows a synergistic effect on citrus red spider mites. The mass ratio of the two is 1:8, and the LC 50 The maximum co-toxicity coefficient was 2.9623 mg / L, and the maximum co-toxicity coefficient was 197.792, showing a significant synergistic effect. When the mass ratio of the two was 1:50-1:32 and 50:1, the co-toxicity coefficient was less than 120, showing an additive effect.

[0123] Table 3 Indoor biological activity test of citrus red spider mite with sulfiflumin and hexythiazox

[0124]

[0125]

[0126] From the results of the indoor biological activity test (Table 3), it can be seen that the combination of sulfiflumin and hexythiazox has a good control effect on citrus red spider mites at a certain mass ratio. The mass ratio of sulfiflumin to hexythiazox is 1:45 to 35:1, which shows a synergistic effect on citrus red spider mites. The mass ratio of the two is 1:5, and the LC 50 It is 4.4257 mg / L, the maximum co-toxicity coefficient is 188.375, and the synergistic effect is significant; when the mass ratio of the two is 45:1, the co-toxicity coefficient is less than 120, showing an additive effect.

[0127] Table 4 Indoor biological activity test of citrus red spider mite with sulfiflumin and chloranil

[0128]

[0129] The results of the indoor biological activity test (Table 4) show that the combination of sulfiflumin and propargite has a good control effect on citrus red spider mites at a certain mass ratio. The mass ratio of sulfiflumin to propargite is 1:40 to 20:1, which shows a synergistic effect on citrus red spider mites. The mass ratio of the two is 1:15, and the LC 50 It is 14.9513 mg / L, the maximum co-toxicity coefficient is 213.314, and the synergistic effect is significant; when the mass ratio of the two is 30:1-40:1, 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 Lijiazhai citrus orchard in Yongfu Town, Yongfu County, Guangxi. The soil texture of the test site is acidic moist sandy soil. The fertility of the test site is above average, the terrain is flat, and drainage and irrigation are convenient.

[0132] Experimental crops: citrus (Nanfeng mandarin oranges), 5 years old, growing well.

[0133] Experimental Design: Following the guidelines for pesticide field efficacy trials, 9 treatments and a blank control were set up, totaling 10 treatments. Each treatment had four replicates, resulting in 40 plots. Plots were arranged in randomized blocks, with two citrus trees per plot. During the peak season of citrus spider mite infestation, canopy spraying was performed using a WS-16 knapsack manual sprayer with a single hollow cone nozzle and an operating pressure of 0.2-0.4 MPa. Spray was applied at the designed multiple to ensure thorough coverage of both the front and back of the leaves.

[0134] Survey method: Investigate the insect population base before spraying, and survey once every 3, 15, and 30 days after spraying. In each plot, survey two trees, and survey each tree in five directions: east, south, west, north, and center. In each direction, survey five leaves at a fixed point, check the number of live mites on the front and back of the leaves, and calculate the control effect.

[0135] Calculation method of drug efficacy:

[0136]

[0137] Field efficacy test results and analysis:

[0138] Table 5 Field efficacy test results

[0139]

[0140] Impact on crop safety: After observation, all test drugs were safe for citrus, no phytotoxicity was observed after application, and citrus grew normally.

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

[0142] As shown in Table 5, 3 days after treatment, the control efficacy of the nine acaricides against citrus red spider mites ranged from 55.11% to 91.30%, among which the control efficacy of 20% sulfiflumin·clofentezine wettable powder (1:1), 18% sulfiflumin·fluclofenazine suspension (5:1), 12% sulfiflumin·hexythiazox emulsifiable concentrate (1:1) and 13% sulfiflumin·propargyl emulsifiable concentrate (1:12) were 88.17%, 91.30%, 86.66% and 85.17%, respectively, which were significantly higher than those of 20% clofentezine suspension, 36% fluclofenazine suspension, 5% hexythiazox emulsifiable concentrate, 30% propargyl wettable powder and 20% sulfiflumin suspension. Fifteen days after application, the control efficacy of the nine acaricides increased compared to three days after application. The control efficacy of 20% sulfiflumin·clofentezine wettable powder (1:1), 18% sulfiflumin·flumethoxazine suspension concentrate (5:1), 12% sulfiflumin·hexythiazox emulsifiable concentrate (1:1), and 13% sulfiflumin·propargyl emulsifiable concentrate (1:12) were all above 92%. Fifteen days after application, the control efficacy of 20% sulfiflumin·clofentezine wettable powder (1:1), 18% sulfiflumin·flumethoxazine 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 showed good rapid effect and long-lasting effect, and were safe and could be used for the control of citrus red spider mites in production.

[0144] Although the present invention has been described in detail above using general descriptions and specific implementation plans, it is obvious to those skilled in the art that some modifications or improvements can be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A sulfiflumin-containing acaricidal composition, characterized in that: The active ingredients of the acaricidal composition include active ingredient A and active ingredient B, wherein the active ingredient A is sulfiflumin and the active ingredient B is hexythiazox.

2. The acaricidal composition according to claim 1, characterized in that The mass ratio of active ingredient A to active ingredient B in the acaricidal composition is 1:52 to 56:

1.

3. The acaricidal composition according to claim 1, characterized in that The mass ratio of the active ingredient A to the active ingredient B is 1:45 to 35:1, preferably 1:35 to 25:

1.

4. The acaricidal composition according to claim 1, characterized in that The acaricidal composition contains, in addition to the active ingredient, auxiliary ingredients, which are one or more of a wetting agent, a dispersant, an emulsifier, a thickener, a disintegrant, an antifreeze agent, a defoaming agent, a solvent, a preservative, a stabilizer, a synergist, a binder, a filler or a carrier.

5. The acaricidal composition according to claim 1, characterized in that The acaricidal composition can be prepared into a formulation form permitted by pesticides, and the formulation form is a suspension, a wettable powder, a water-dispersible granule, an aqueous emulsion, an emulsifiable concentrate or a microemulsion.

6. The acaricidal composition according to claim 5, characterized in that The preparation dosage form is suspension, wettable powder and water dispersible granules.

7. Use of the acaricidal composition according to any one of claims 1 to 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, characterized in that The harmful mites are two-spotted spider mites, cinnabarinus spider mites and / or citrus red spider mites; preferably citrus red spider mites.

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

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