An insecticidal composition containing sulfoxaflor and its use

Abstract

The present invention belongs to the field of pesticide technology, and in particular to a kind of insecticidal composition containing sulfoxaflor and its use. The present invention discloses a kind of insecticidal composition containing sulfoxaflor, and the insecticidal composition includes: sulfoxaflor, high-efficiency cyfluthrin, 5-nitro-8-hydroxyquinoline; wherein, the mass ratio of sulfoxaflor, high-efficiency cyfluthrin, 5-nitro-8-hydroxyquinoline is (1-10): (1-10): (0.5-1). The insecticidal composition of the present invention has multiple active ingredients, solves the resistance problem in pest control, improves the control effect, increases the yield of crops, avoids environmental pollution, is low-toxic to beneficial organisms, and has high safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of pesticides, and in particular, relates to an insecticidal composition containing sulfoxaflor and a use thereof. Background Art

[0002] Sulfoxaflor, its chemical structure is: 10 H 10 F3N3OS, chemical name: [1-[6-(trifluoromethyl)pyridin-3-yl]ethyl]methyl(oxy)-λ4-mercaptocyanamide. Sulfoxaflor is a sulfonimide insecticide that acts on the unique binding site in the choline receptor to exert its insecticidal function. It can be absorbed through leaves, stems and roots and enter the plant body. Sulfoxaflor is suitable for the prevention and control of peach / apple aphids, borers; vegetable aphids, whiteflies, etc.; it has the advantages of high efficiency, rapidity and long residual effect, and can effectively prevent and control sap-sucking pests that are resistant to nicotine, pyrethroids, organophosphates and carbamate pesticides. It has the advantages of fast onset, strong efficacy and low dosage, and has broad prospects in the cotton and rice markets.

[0003] 5-Nitro-8-hydroxyquinoline, also known as nitroxoline, was once developed as an oral antibiotic drug, mainly used for urinary tract infections, and had a relatively safe history of use. Later, it was replaced by the discovery and use of new antibiotics. The latest research found that nitroxoline can simultaneously inhibit methionine aminopeptidase MetAP2 and silent information regulator 2-related enzyme SIRT1 in vascular endothelial cells, exerting a synergistic inhibitory effect on tumor angiogenesis, and also has an inhibitory effect on the proliferation of tumor cells.

[0004] Based on the current single active ingredient pesticide varieties have narrow insecticide spectrum, pests are prone to develop drug resistance after continuous use, and using more times will aggravate environmental pollution. In addition, there is no report on the application of 5-nitro-8-hydroxyquinoline to pesticides. The present invention uses sulfoxaflor and 5-nitro-8-hydroxyquinoline in combination to explore its effect in pesticides. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems existing in the prior art and provide an insecticidal composition containing sulfoxaflor and its use. The insecticidal composition of the present invention contains multiple effective active ingredients, which can synergistically increase the control effect on pests and diseases.

[0006] The purpose of the present invention and the solution to the technical problem are achieved by adopting the following technical solutions.

[0007] One aspect of the present invention provides an insecticidal composition containing sulfoxaflor, the insecticidal composition comprising: sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline; wherein the mass ratio of sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline is (1-10): (1-10): (0.5-1).

[0008] In a preferred embodiment of the present invention, the insecticide composition further comprises: a carrier and a hydroxy acid; wherein the mass ratio of the carrier to the hydroxy acid is (0.3-0.7): (0.03-0.05).

[0009] In a preferred embodiment of the present invention, the hydroxy acid is selected from any one of salicylic acid, p-hydroxybenzoic acid or m-hydroxybenzoic acid.

[0010] In a preferred embodiment of the present invention, the support is nano-activated carbon / silica sol composite powder.

[0011] In a preferred embodiment of the present invention, the method for preparing the support body comprises the following steps:

[0012] The solid carbon source is subjected to a freeze-thaw cycle, and then the carbon source is washed, dried, and crushed through a 200-400 mesh sieve to obtain activated carbon powder;

[0013] Add orthosilicate to anhydrous ethanol and stir to disperse for 1 to 3 hours, then add hydrochloric acid to adjust the pH of the solution system to 2 to 4, and stir for 2 to 4 hours to obtain silica sol;

[0014] The activated carbon powder obtained is ultrasonically dispersed in N,N-dimethylformamide to obtain a suspension, and then the obtained suspension is added to the silica sol and stirred for 2 to 6 hours, and then allowed to stand for aging. The obtained gel block is washed and dried to form a dry gel, and then the dry gel is placed in water and treated at 100 to 150° C. for 2 to 4 hours. The sample is taken out, freeze-dried, crushed and passed through a 400 to 1000 mesh sieve to obtain a nano activated carbon / silica sol composite powder.

[0015] In a preferred embodiment of the present invention, the solid carbon source is selected from any one of graphite, carbon black or activated carbon.

[0016] In a preferred embodiment of the present invention, the freeze-thaw cycle conditions are: first freezing at -20 to -10°C for 10 to 16 hours; then heating to 15 to 30°C to thaw for 10 to 16 hours; the number of cycles is 5 to 15 times.

[0017] In a preferred embodiment of the present invention, the orthosilicate is methyl orthosilicate and / or ethyl orthosilicate.

[0018] In a preferred embodiment of the present invention, the orthosilicate and anhydrous ethanol are added in a volume ratio of 1:3 to 5.

[0019] In a preferred embodiment of the present invention, the activated carbon powder and N,N-dimethylformamide are added in an amount of 1 g:2-6 mL in a mass volume ratio.

[0020] In a preferred embodiment of the present invention, the suspension is mixed with the silica sol in a volume ratio of 1:1-3.

[0021] In a preferred embodiment of the present invention, the insecticide composition further comprises: an adjuvant.

[0022] In a preferred embodiment of the present invention, the auxiliary agent is selected from any one of ethanol, acetone or ether.

[0023] By means of the above technical solution, the present invention has at least the following advantages:

[0024] 1. The insecticide composition of the present invention solves the resistance problem in pest control, improves the control effect, increases the yield of crops, avoids environmental pollution, has low toxicity to beneficial organisms, and is highly safe.

[0025] 2. The insecticide composition of the present invention uses sulfoxaflor and high-efficiency cypermethrin as main active substances, supplemented with 5-nitro-8-hydroxyquinoline, and acts on the unique binding site of acetylcholine receptors of piercing-sucking mouthparts pests to exert insecticidal efficacy. The action mode of sulfoxaflor is contact and stomach poison, with systemic conduction and penetration, high efficiency, broad-spectrum activity, low usage and long residual effect period, suitable for the prevention and control of aphids, whiteflies, planthoppers and scale insects, etc., and can effectively prevent and control piercing-sucking mouthparts pests that are resistant to nicotine, pyrethroids, organophosphorus and carbamate pesticides. However, it has low toxicity to non-target arthropods. High-efficiency cypermethrin is a non-systemic insecticide with contact and stomach poison effects, which destroys the function of the nervous system by interacting with the sodium channels of pests. Can effectively prevent and treat the pests such as coleoptera, hemiptera, homoptera and lepidoptera on cereal crops, cotton, fruit trees and vegetables, such as cotton bollworm, pink bollworm, tobacco budworm, cotton boll weevil, alfalfa leaf weevil, cabbage butterfly, geometrid, apple moth, cabbage worm, small apple moth, American armyworm, potato beetle, aphid, corn borer, cutworm. Through research, it is found that the insecticidal effect of sulfoxaflor and high-efficiency cyfluthrin can be significantly improved in the presence of 5-nitro-8-hydroxyquinoline. The present invention uses sulfoxaflor, high-efficiency cyfluthrin and 5-nitro-8-hydroxyquinoline in combination, wherein 5-nitro-8-hydroxyquinoline has the effect of promoting the insecticidal effect of sulfoxaflor and high-efficiency cyfluthrin, and the two substances are used in combination with the advantages of fast onset, strong efficacy and low dosage.

[0026] 3. In order to further improve the insecticidal effect of the composition, the present invention further adds a carrier and a hydroxy acid. Through the connection of the hydroxy acid, sulfoxaflor, high-efficiency cyfluthrin and 5-nitro-8-hydroxyquinoline are loaded on the carrier, which can achieve effective aggregation of sulfoxaflor, high-efficiency cyfluthrin and 5-nitro-8-hydroxyquinoline, thereby further improving the drug efficacy.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Unless otherwise specified, the experimental methods used in the following examples are all conventional methods.

[0030] Unless otherwise specified, the materials and reagents used in the following examples can be obtained from commercial sources.

[0031] Embodiment 1:

[0032] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0033] S1: The activated carbon was first frozen at -15 ° C for 13 hours, then heated to 22 ° C to melt for 13 hours, and the freeze-thaw cycle was repeated 10 times. After that, the activated carbon was washed, dried, crushed and passed through a 300-mesh sieve to obtain activated carbon powder. Ethyl orthosilicate was added to anhydrous ethanol at a volume ratio of 1:4 and stirred and dispersed for 2 hours, and then hydrochloric acid was added to adjust the pH of the solution system to 3, and stirred for 3 hours to obtain silica sol. The obtained activated carbon powder was ultrasonically dispersed in N, N-dimethylformamide at a volume ratio of 1g:4mL to obtain a suspension, and then the obtained suspension was added to the silica sol at a volume ratio of 1:2 and stirred for 4 hours, and then allowed to stand for aging. The obtained gel block was washed and dried to obtain a dry gel, and then the dry gel was placed in water and treated at 125 ° C for 3 hours. The sample was taken out, freeze-dried, crushed and passed through an 800-mesh sieve to obtain a nano-activated carbon / silica sol composite powder as a support.

[0034] S2: Prepare the raw materials of sulfoxaflor, high-efficiency cypermethrin, 5-nitro-8-hydroxyquinoline, a carrier, salicylic acid and acetone in a mass ratio of 1:5.5:0.75:0.5:0.04:10.

[0035] S3: The support is dispersed in acetone to obtain a suspension, and then salicylic acid is added and stirred at 45°C for 2 hours. After stirring, the mixture is cooled to room temperature, and sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline are added in sequence and stirred evenly.

[0036] Embodiment 2:

[0037] S1: The activated carbon was first frozen at -10 ° C for 16 hours, then heated to 30 ° C for 10 hours and thawed for 5 times, and then the activated carbon was washed, dried, crushed and passed through a 200-mesh sieve to obtain activated carbon powder. Ethyl orthosilicate was added to anhydrous ethanol at a volume ratio of 1:5 and stirred and dispersed for 1 hour, and then hydrochloric acid was added to adjust the pH of the solution system to 4, and stirred for 2 hours to obtain silica sol. The activated carbon powder was ultrasonically dispersed in N, N-dimethylformamide at a volume ratio of 1g:6mL to obtain a suspension, and then the obtained suspension was added to the silica sol at a volume ratio of 1:1 and stirred for 6 hours, and then allowed to stand for aging. The obtained gel block was washed and dried to obtain a dry gel, and then the dry gel was placed in water and treated at 100 ° C for 4 hours. The sample was taken out, freeze-dried, crushed and passed through an 800-mesh sieve to obtain a nano-activated carbon / silica sol composite powder as a support.

[0038] S2: Prepare the raw materials of sulfoxaflor, high-efficiency cypermethrin, 5-nitro-8-hydroxyquinoline, a carrier, p-hydroxybenzoic acid and acetone in a mass ratio of 1:10:0.5:0.3:0.03:10.

[0039] S3: The support is dispersed in acetone to obtain a suspension, and then p-hydroxybenzoic acid is added and stirred continuously at 40°C for 3 hours. After stirring, the mixture is cooled to room temperature, and sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline are added in sequence and stirred evenly.

[0040] Embodiment 3:

[0041] S1: The activated carbon was first frozen at -20 ° C for 10 hours, then heated to 15 ° C to melt for 16 hours, and the freeze-thaw cycle was performed 15 times. After that, the activated carbon was washed, dried, crushed and passed through a 400-mesh sieve to obtain activated carbon powder. Methyl orthosilicate was added to anhydrous ethanol at a volume ratio of 1:3 and stirred and dispersed for 3 hours, and then hydrochloric acid was added to adjust the pH of the solution system to 2, and stirred for 4 hours to obtain silica sol. The activated carbon powder was ultrasonically dispersed in N, N-dimethylformamide at a volume ratio of 1g:2mL to obtain a suspension, and then the obtained suspension was added to the silica sol at a volume ratio of 1:3 and stirred for 2 hours, and then allowed to stand for aging. The obtained gel block was washed and dried to obtain a dry gel, and then the dry gel was placed in water and treated at 150 ° C for 2 hours. The sample was taken out, freeze-dried, crushed and passed through an 800-mesh sieve to obtain a nano-activated carbon / silica sol composite powder as a support.

[0042] S2: Prepare the raw materials of sulfoxaflor, high-efficiency cypermethrin, 5-nitro-8-hydroxyquinoline, a carrier, m-hydroxybenzoic acid and acetone in a mass ratio of 1:1:1:0.7:0.05:10.

[0043] S3: The support is dispersed in acetone to obtain a suspension, and then m-hydroxybenzoic acid is added and stirred continuously at 50°C for 1 hour. After stirring, the mixture is cooled to room temperature, and sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline are added in sequence and stirred evenly.

[0044] Embodiment 4:

[0045] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0046] S1: The activated carbon was first frozen at -20 ° C for 13 hours, then heated to 25 ° C to melt for 13 hours, and the freeze-thaw cycle was repeated 10 times. After that, the activated carbon was washed, dried, crushed and passed through a 400-mesh sieve to obtain activated carbon powder. TES was added to anhydrous ethanol at a volume ratio of 1:3 and stirred and dispersed for 2 hours, and then hydrochloric acid was added to adjust the pH of the solution system to 2, and stirred for 4 hours to obtain silica sol. The activated carbon powder was ultrasonically dispersed in N, N-dimethylformamide at a volume ratio of 1g:5mL to obtain a suspension, and then the obtained suspension was added to the silica sol at a volume ratio of 1:1 and stirred for 3 hours, and then allowed to stand for aging. The obtained gel block was washed and dried to obtain a dry gel, and then the dry gel was placed in water and treated at 130 ° C for 3 hours. The sample was taken out, freeze-dried, crushed and passed through a 900-mesh sieve to obtain a nano-activated carbon / silica sol composite powder as a support.

[0047] S2: Prepare the raw materials of sulfoxaflor, high-efficiency cypermethrin, 5-nitro-8-hydroxyquinoline, a carrier, salicylic acid and acetone in a mass ratio of 5.5:1:0.8:0.5:0.03:10.

[0048] S3: The support is dispersed in acetone to obtain a suspension, and then salicylic acid is added and stirred at 45°C for 2 hours. After stirring, the mixture is cooled to room temperature, and sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline are added in sequence and stirred evenly.

[0049] Comparative Example 1:

[0050] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0051] S1: Wash the activated carbon, dry it, and crush it through a 300-mesh sieve to obtain activated carbon powder. Add tetraethyl orthosilicate to anhydrous ethanol at a volume ratio of 1:4, stir and disperse it for 2 hours, then add hydrochloric acid to adjust the pH of the solution system to 3, and stir for 3 hours to obtain silica sol. Ultrasonic disperse the obtained activated carbon powder in N,N-dimethylformamide at a volume ratio of 1g:4mL to obtain a suspension, then add the obtained suspension to the silica sol at a volume ratio of 1:2 and stir for 4 hours, then let it stand for aging, wash the obtained gel block and dry it to a dry gel, then place the dry gel in water and treat it at 125°C for 3 hours, take out the sample, freeze-dry it, crush it and pass it through an 800-mesh sieve to obtain a nano-activated carbon / silica sol composite powder as a carrier.

[0052] S2: Prepare the raw materials of sulfoxaflor, high-efficiency cypermethrin, 5-nitro-8-hydroxyquinoline, a carrier, salicylic acid and acetone in a mass ratio of 1:5.5:0.75:0.5:0.04:10.

[0053] S3: The support is dispersed in acetone to obtain a suspension, and then salicylic acid is added and stirred at 45°C for 2 hours. After stirring, the mixture is cooled to room temperature, and sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline are added in sequence and stirred evenly.

[0054] Comparative Example 2:

[0055] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0056] S1: The activated carbon was first frozen at -15°C for 13 hours, then heated to 22°C to melt for 13 hours and freeze-thawed for 10 times. The activated carbon was then washed, dried, and crushed through an 800-mesh sieve to obtain activated carbon powder as a support.

[0057] S2: Prepare the raw materials of sulfoxaflor, high-efficiency cypermethrin, 5-nitro-8-hydroxyquinoline, a carrier, salicylic acid and acetone in a mass ratio of 1:5.5:0.75:0.5:0.04:10.

[0058] S3: The support is dispersed in acetone to obtain a suspension, and then salicylic acid is added and stirred at 45°C for 2 hours. After the stirring is completed, the suspension is cooled to room temperature, and sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline are added in sequence and stirred evenly.

[0059] Comparative Example 3:

[0060] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0061] S1: Prepare the raw materials of sulfoxaflor, beta-cypermethrin, 5-nitro-8-hydroxyquinoline, activated carbon, salicylic acid and acetone in a mass ratio of 1:5.5:0.75:0.5:0.04:10.

[0062] S2: Disperse the activated carbon in acetone to obtain a suspension, then add salicylic acid and continue stirring at 45°C for 2 hours. After stirring, cool to room temperature, add sulfoxaflor, high-efficiency cypermethrin, and 5-nitro-8-hydroxyquinoline in sequence and stir evenly.

[0063] Comparative Example 4:

[0064] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0065] S1: Prepare the raw materials of sulfoxaflor, beta-cypermethrin and acetone in a mass ratio of 1:5.5:11.29.

[0066] S2: Add sulfoxaflor and beta-cypermethrin into acetone and mix well.

[0067] Comparative Example 5:

[0068] The preparation method of the insecticidal composition containing sulfoxaflor in this embodiment is as follows:

[0069] S1: Prepare the raw materials of sulfoxaflor and acetone in a mass ratio of 1:16.79.

[0070] S2: Add sulfoxaflor to acetone and mix well.

[0071] Comparative Example 6:

[0072] The preparation method of the insecticidal composition containing high-efficiency cyfluthrin in this embodiment is as follows:

[0073] S1: Prepare the raw materials of high-efficiency cyfluthrin and acetone in a mass ratio of 5.5:12.29.

[0074] S2: Add high-efficiency cyfluthrin to acetone and stir well.

[0075] Test 1: Contact test

[0076] Sample preparation: The insecticide compositions of Examples 1 to 3 and Comparative Examples 1 to 6 were diluted with pure water to concentrations of 0, 10, and 50 times, respectively, to obtain samples to be tested at different dilution multiples.

[0077] Test method: 20 healthy 2nd instar larvae of basically the same size were selected from each group and placed in a tray. The diluted solution of each concentration was pipetted with a liquid pipette and dripped on the back of the thorax of the larvae, with 10uL dripped on each larva.

[0078] The larvae of each group were placed in an environment with a temperature of 26°C, a humidity of about 70%, and a light intensity of 10:14 (L:D) for feeding. The feeding conditions of each group of larvae were kept the same, and the above process was repeated 3 times.

[0079] Record the number of larvae that died at 12h, 24h, 48h and 72h respectively:

[0080] Results: See Tables 1 to 3.

[0081] Table 1 Contact killing effects of different insecticide combinations (diluted 0 times) on 2nd instar larvae of borer

[0082]

[0083] Table 2 The contact killing effect of different insecticide combinations (diluted 10 times) on the 2nd instar larvae of borer

[0084]

[0085]

[0086] Table 3 Contact killing effect of different insecticide compositions (diluted 50 times) on 2nd instar larvae of borer

[0087]

[0088]

[0089] It can be seen from the results in Tables 1 to 3 that with the increase in the dilution multiple, the mortality rate of different compositions to the larvae of the borer shows a downward trend: the number of deaths of the larvae of the borer applied with the compositions of each embodiment before dilution can reach 100%, but with the dilution multiple increased to 10 times and 50 times, the mortality rate of the larvae of the borer applied with the compositions of the embodiments and comparative examples is significantly reduced, but the number of deaths of the larvae of the borer applied with the compositions of comparative examples 1 to 6 is significantly higher than that of the groups of embodiments 1 to 6, which shows that the composition of the present invention can significantly improve the contact killing effect on the larvae of the borer.

[0090] Experiment 2: Field experiment

[0091] Sample preparation: The insecticide compositions prepared in Example 1 and Comparative Examples 1 to 6 were diluted 50 times with water to obtain insecticide dilutions, which were numbered 1 to 7 (corresponding to the insecticide compositions in Example 1 and Comparative Examples 1 to 6).

[0092] Test location: a fruit and vegetable planting area on a farm in Maoming City, Guangdong Province. The experimental area is planted with cabbage and has uniform soil, flat terrain, and excellent drainage and irrigation.

[0093] Experimental method: Divide the experimental site into 5 large groups, each large group is divided into 3 small groups, a total of 15 small groups, and reserve a group of identical experimental fields as a blank control.

[0094] The vegetable leaves were sprayed with a sprayer at a dosage of 1 mL / plant. Each plant was treated 3 times, and each pesticide was used to treat 3 groups. The average value was taken. The blank control group was sprayed with an equal amount of clean water.

[0095] The number of pests was counted using the five-point sampling method before and after application, and the average value was taken. Vegetables were managed using conventional field management methods during the application period. The reduction rates of various pests were counted 7 and 14 days after application:

[0096] Insect population reduction rate: Insect population reduction rate (%) = (number of live insects before application - number of live insects after application) / number of live insects before application × 100%.

[0097] Results: See Tables 4-5.

[0098] Table 4 The reduction rate of insect population of various pests by different insecticides 7 days after application

[0099]

[0100]

[0101] Table 5 The reduction rate of insect population of various pests by different insecticides 14 days after application

[0102]

[0103] It can be seen from the results of Tables 4 and 5 that, compared with Comparative Examples 1 to 6, the insecticide composition of Example 1 of the present invention has the best control effect on four pests in cabbage. Among them, sulfoxaflor and 5-nitro-8-hydroxyquinoline are the main active substances, and the addition of 5-nitro-8-hydroxyquinoline plays a synergistic role. The carrier can aggregate the active substances, thereby improving the efficacy of the insecticide composition.

[0104] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An insecticidal composition containing sulfoxaflor, characterized in that: The insecticide composition comprises: sulfoxaflor, high-efficiency cyfluthrin, and 5-nitro-8-hydroxyquinoline; wherein the mass ratio of sulfoxaflor, high-efficiency cyfluthrin, and 5-nitro-8-hydroxyquinoline is (1-10): (1-10): (0.5-1); The insecticide composition further comprises: a carrier and a hydroxy acid; wherein the mass ratio of the carrier to the hydroxy acid is (0.3-0.7): (0.03-0.05), and the hydroxy acid is selected from any one of salicylic acid, p-hydroxybenzoic acid or m-hydroxybenzoic acid; The support is a nano-activated carbon / silica sol composite powder, and the preparation method of the support comprises the following steps: subjecting a solid carbon source to a freeze-thaw cycle, then washing the carbon source, drying it, and crushing it through a 200-400 mesh sieve to obtain activated carbon powder; adding orthosilicate to anhydrous ethanol, stirring and dispersing it for 1-3 hours, then adding hydrochloric acid to adjust the pH of the solution system to 2-4, stirring it for 2-4 hours, and obtaining silica sol; ultrasonically dispersing the obtained activated carbon powder in N,N-dimethylformamide to obtain a suspension The obtained suspension is then added to the silica sol and stirred for 2-6 hours, and then allowed to stand for aging. The obtained gel block is washed and dried to obtain a dry gel, and the dry gel is placed in water and treated at 100-150°C for 2-4 hours. The sample is taken out, freeze-dried, crushed and sieved through a 400-1000 mesh sieve to obtain a nano-activated carbon / silica sol composite powder; wherein the solid carbon source is selected from any one of graphite, carbon black or activated carbon; and the orthosilicate is methyl orthosilicate and / or ethyl orthosilicate.

2. The insecticidal composition containing sulfoxaflor according to claim 1, characterized in that: The conditions of the freeze-thaw cycle are: first freezing at -20~-10°C for 10~16h; then heating to 15~30°C to melt for 10~16h; the number of cycles is 5~15 times.

3. The insecticidal composition containing sulfoxaflor according to claim 1, characterized in that: The orthosilicate and anhydrous ethanol are added in a volume ratio of 1:3-5.

4. The insecticidal composition containing sulfoxaflor according to claim 1, characterized in that: The activated carbon powder and N,N-dimethylformamide are added in a mass volume ratio of 1 g: 2-6 mL; the suspension and the silica sol are mixed in a volume ratio of 1: 1-3.

5. The insecticidal composition containing sulfoxaflor according to claim 1, characterized in that: The insecticide composition further comprises: an adjuvant; the adjuvant is selected from any one of ethanol, acetone or ether.

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