Insecticide composition containing fluopyram and application thereof

Abstract

The invention provides an insecticide composition containing fluopyram and application of the insecticide composition. The pesticide composition containing fluopyram is prepared from the following components in parts by mass: 4 to 6 parts of imidacloprid, 1 to 3 parts of thiamethoxam, 7 to 9 parts of fluopyram, 2 to 6 parts of a dispersing agent, 1 to 3 parts of a wetting agent, 5 to 7 parts of an emulsifying agent, 0.2 to 0.8 part of a thickening agent, 3 to 5 parts of an anti-freezing agent, 0.1 to 0.2 part of a de-foaming agent and 40 to 45 parts of water. The emulsifier is formed by mixing Tween-60, a pesticide emulsifier 2201 and a self-made emulsifier according to the mass ratio of 1: (1.2-1.5): (0.5-0.8). The pesticide composition containing fluopyram can prevent and control peanut root-knot nematode and grub pests of peanuts at the same time, no organic solvent is used, the problems of environment residues and crop root damage are solved, and the problem of crop yield reduction caused by underground pests is solved comprehensively.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticides, and particularly relates to a pesticide composition containing fluopyram and uses thereof. Background Art

[0002] Grubs (Anoma la cuprea), the larvae of scarab beetles, feed on the tender stems of peanut seedlings. When the plants wither and die, they move to other plants to continue to harm them. In addition, the wounds caused by grubs can also induce diseases. Among them, herbivorous grubs have a wide range of diets and harm a variety of crops, cash crops and flower seedlings. They like to eat newly sown seeds, roots, tubers and seedlings, which is very harmful.

[0003] Peanut root knot nematode is a pathogenic nematode that has a serious impact on peanut crops. It belongs to the genus Meloi dogyne spp. Peanut root knot nematode disease is a global disease that occurs in almost all areas where peanuts are grown, especially in various peanut production areas in China. Peanut root knot nematodes can reduce peanut yields, cause poor fruit development, and may cause milky white protrusions on the shell. These protrusions may turn into brown scabs later.

[0004] Peanut root-knot nematodes and white grubs are common underground pests of peanuts and other crops. They damage the root system of plants in different ways, resulting in damaged crop growth and reduced yields. Fluopyram is a highly effective fungicide belonging to the succinate dehydrogenase inhibitor (SDH I) class of compounds. It mainly inhibits the activity of succinate dehydrogenase in fungal cells, thereby preventing the energy metabolism of fungi and achieving a fungicidal effect.

[0005] In the prior art, fluopyram-containing pesticides usually use organic solvents, which are not friendly to the soil, have a damaging and irritating effect on the root system of crops, and have insufficient lateral conduction in the soil. In addition, fluopyram is mainly designed as a nematicide, and its control effect on nematodes (such as peanut root-knot nematodes) has been confirmed, but its direct control effect on insect pests such as white grubs is limited.

[0006] Therefore, there is an urgent need for a soil-friendly, crop-root-safe insecticide composition containing fluopyram, which can effectively eliminate peanut root-knot nematodes and grubs at the same time. Summary of the invention

[0007] The purpose of the present invention is to provide a pesticide composition containing fluopyram and use thereof.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A pesticide composition containing fluopyram, comprising the following components in parts by mass: 4-6 parts of imidacloprid, 1-3 parts of thiamethoxam, 7-9 parts of fluopyram, 2-6 parts of dispersant, 1-3 parts of wetting agent, 5-7 parts of emulsifier, 0.2-0.8 parts of thickener, 3-5 parts of antifreeze agent, 0.1-0.2 parts of defoamer, and 40-45 parts of water; the emulsifier is a mixture of Tween-60, pesticide emulsifier 2201, and self-made emulsifier in a mass ratio of 1: (1.2-1.5): (0.5-0.8);

[0010] The preparation method of the self-made emulsifier is:

[0011] (1) 70 parts by weight of a linear C22 fatty alcohol, 0.06-0.09 parts by weight of gallic acid, 0.06-0.09 parts by weight of etidronic acid, and 0.7-0.8 parts by weight of sodium p-toluenesulfonate were mixed, heated to 125-130° C. with stirring, stirred for 20-30 minutes, and evacuated to −0.1 MPa to obtain a mixture A;

[0012] (2) heating 45 parts by weight of linear C22 fatty alcohol to 75-80° C., stirring for 20-30 min, adding 8-10 parts by weight of P2O5 and 13-15 parts by weight of metaphosphoric acid, and homogenizing at -0.1 MPa for 5-10 min to obtain a mixture B;

[0013] (3) Adding mixture B to mixture A rapidly in 3-5 times, with an interval of 20-25 minutes between each addition. After the addition is completed, the reaction is continued at -0.1 MPa and 125-130° C. for 9-12 hours to obtain mixture C;

[0014] (4) The mixture C is cooled to 60-65°C, 10 parts by weight of deionized water is added for hydrolysis for 2-3 hours, 7 parts by weight of a 25-27 wt% H2O2 aqueous solution is added, and the mixture is kept warm for 30-40 minutes. Then, 3-5 parts by weight of NaHSO3 is added, and the mixture is kept warm for 30-40 minutes. The mixture is cooled and discharged to obtain a homemade emulsifier.

[0015] Peanut root-knot nematodes and grubs are two common soil pests, the former is a nematode, and the latter is a scarab larvae, both of which can seriously damage the root system of peanut crops, affecting yield and quality. Imidacloprid and fluopyram are usually mixed on the market to prevent peanut root-knot nematodes and grubs in peanuts, but the prevention effect is not ideal. The present invention compounds a specific proportion of imidacloprid, thiamethoxam, and fluopyram to improve the prevention effect of peanut root-knot nematodes and grubs. A specific proportion of imidacloprid, thiamethoxam, and fluopyram are compounded, and through a multi-mode mechanism of action, different mechanisms of action can complement each other and provide a more comprehensive control effect; the three produce a synergistic effect, thiamethoxam has a rapid knockdown effect and a long residual effect period, it can be quickly absorbed by plants, and transported to the entire plant through the xylem. The three combine to play a synergistic effect and can solve these two major underground pest problems at the same time.

[0016] In order to avoid organic solvents, which are unfriendly to the soil and have harmful and irritating effects on the root system of crops, the present invention selects water as the solvent. When fluopyram is mixed with the other two components, the suspension rate in water is not ideal. When the aggregates between particles of the product merge and become larger and aggregate during storage, it will cause the product to precipitate and agglomerate and become ineffective. The present invention uses Tween-60, pesticide emulsifier 2201 and homemade emulsifier in a specific ratio as emulsifiers to improve the suspension rate of the insecticide composition. Tween-60, pesticide emulsifier 2201 and homemade emulsifier produce a synergistic effect. The homemade emulsifier forms a surfactant molecule with a long carbon chain, which can be effectively adsorbed on the surface of the pesticide particles to form a stable interface film to prevent the particles from aggregating and settling, thereby improving the suspension rate, and synergizing with Tween-60 and pesticide emulsifier 2201 to improve the suspension rate of the insecticide composition. Under this condition, low temperature stability is also improved. However, after adding the homemade emulsifier, the thermal storage stability of the insecticide composition was poor. It may be that temperature changes can affect the physical state and behavior of the homemade emulsifier molecules, affecting their arrangement and stability at the oil-water interface.

[0017] Furthermore, the thickener is a mixture of xanthan gum, magnesium aluminum silicate and sodium alginate in a mass ratio of 1: (0.4-0.7): (1.3-1.6).

[0018] Furthermore, the antifreeze agent is selected from one or more of polyethylene glycol, urea, sorbitol, ethylene glycol, and glycerol.

[0019] In order to improve the antifreeze effect, the antifreeze agent is further a mixture of polyethylene glycol, urea and sorbitol in a mass ratio of (0.2-0.6):1:(1.6-1.8).

[0020] Furthermore, the defoamer is an organosilicon defoamer HY-1572.

[0021] Furthermore, the dispersant is a mixture of a phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate in a mass ratio of 1: (1.7-1.9): (0.3-0.5).

[0022] Furthermore, the wetting agent is a mixture of sodium dodecyl sulfate, sodium butylnaphthalene sulfonate (Lakai powder BX), and Tween-80 in a mass ratio of (1.5-1.7):1:(0.6-0.8).

[0023] The present invention can improve the thermal storage stability of the insecticide composition by using a specific ratio of phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate as dispersants. The dispersant of the present invention can reduce the surface tension on the liquid-solid interface at high temperature, provide a steric hindrance effect, and make the insecticide particles more easily dispersed in water. The dispersant of the present invention and the wetting agent work synergistically to reduce the residue of the insecticide composition after pouring.

[0024] Furthermore, the preparation method is: mixing the components according to the formula amount, then mixing them using a high-speed mixer, and sand-milling them using a sand mill until the suspended particles have a particle size D98 < 1 μm, thereby obtaining the insecticide composition.

[0025] The formulation of the insecticide composition containing fluopyram prepared by the present invention is a suspension.

[0026] The present invention also provides a use of an insecticide composition containing fluopyram for preventing and controlling peanut root-knot nematodes and grubs.

[0027] Furthermore, the application amount of the insecticide composition is 18-23 g of active ingredient per mu.

[0028] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0029] 1. The insecticide composition containing fluopyram of the present invention can simultaneously control peanut root-knot nematodes and white grub pests of peanuts without using any organic solvents, thereby solving the problems of environmental residues and damage to the root system of crops, and comprehensively solving the problem of crop yield reduction caused by underground pests.

[0030] 2. The present invention compounds imidacloprid, thiamethoxam and fluopyram in a specific ratio to improve the control effect of peanut root-knot nematodes and grubs. The specific ratio of imidacloprid, thiamethoxam and fluopyram is compounded through a multi-mode action mechanism, and different action mechanisms can complement each other to provide a more comprehensive control effect.

[0031] 3. The present invention can improve the thermal storage stability of the insecticide composition by using a specific ratio of phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate as dispersants.

[0032] 4. The dispersant and wetting agent of the present invention work synergistically to reduce the residue of the pesticide composition after pouring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0034] The raw materials used in the present invention are purchased from the following manufacturers:

[0035] Phosphate ester dispersant, Agrin 1015, Nanjing Jierun Technology Co., Ltd.

[0036] Polyethylene glycol is polyethylene glycol 400, Nanjing Yingguan New Material Technology Co., Ltd. Sodium butylnaphthalene sulfonate (pulp powder), Hubei Langbowan Biomedicine Co., Ltd.

[0037] Pesticide emulsifier 2201, Guangzhou Xiangmei Chemical Technology Co., Ltd.

[0038] Silicone defoamer HY-1572, Shanghai Huiyan New Materials Co., Ltd.

[0039] Example 1

[0040] This embodiment provides an insecticide composition containing fluopyram, comprising the following components in parts by mass: 5 parts of imidacloprid, 2 parts of thiamethoxam, 8 parts of fluopyram, 4 parts of dispersant, 2 parts of wetting agent, 6 parts of emulsifier, 0.5 parts of thickener, 4 parts of antifreeze agent, 0.15 parts of defoamer, and 43 parts of water; the emulsifier is a mixture of Tween-60, pesticide emulsifier 2201, and self-made emulsifier in a mass ratio of 1:1.4:0.6;

[0041] The preparation method of the self-made emulsifier is:

[0042] (1) 70 parts by weight of a linear C22 fatty alcohol, 0.08 parts by weight of gallic acid, 0.07 parts by weight of etidronic acid, and 0.76 parts by weight of sodium p-toluenesulfonate were mixed, heated to 127° C. with stirring, stirred for 25 minutes, and evacuated to −0.1 MPa to obtain a mixture A;

[0043] (2) heating 45 parts by weight of linear C22 fatty alcohol to 77° C., stirring for 25 min, adding 9 parts by weight of P2O5 and 14 parts by weight of metaphosphoric acid, and homogenizing at −0.1 MPa for 7 min to obtain a mixture B;

[0044] (3) Mixture B was added to mixture A in four portions, each time with an interval of 20 minutes. After the addition was completed, the reaction was continued at -0.1 MPa and 127° C. for 10 hours to obtain mixture C;

[0045] (4) The mixture C was cooled to 62° C., 10 parts by weight of deionized water was added for hydrolysis for 2.5 h, 7 parts by weight of a 26 wt % H2O2 aqueous solution was added, and the mixture was kept warm for 35 min. Then, 4 parts by weight of NaHSO3 was added, and the mixture was kept warm for 35 min. The mixture was cooled and discharged to obtain a homemade emulsifier.

[0046] The thickener is a mixture of xanthan gum, magnesium aluminum silicate and sodium alginate in a mass ratio of 1:0.6:1.5.

[0047] The antifreeze agent is a mixture of polyethylene glycol, urea and sorbitol in a mass ratio of 0.4:1:1.7.

[0048] The defoamer is organic silicon defoamer HY-1572.

[0049] The dispersant is a mixture of phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate in a mass ratio of 1:1.8:0.4.

[0050] The wetting agent is a mixture of sodium dodecyl sulfate, sodium butyl naphthalene sulfonate and Tween-80 in a mass ratio of 1.6:1:0.7.

[0051] The preparation method of the insecticide composition is as follows: each component is mixed according to the formula amount, then mixed by a high-speed mixer, and sand-milled by a sand mill until the suspended particle size D98 is less than 1 μm, so as to obtain the insecticide composition.

[0052] Example 2

[0053] This embodiment provides an insecticide composition containing fluopyram, comprising the following components in parts by mass: 4 parts of imidacloprid, 3 parts of thiamethoxam, 7 parts of fluopyram, 6 parts of dispersant, 1 part of wetting agent, 7 parts of emulsifier, 0.2 parts of thickener, 5 parts of antifreeze agent, 0.1 parts of defoamer, and 45 parts of water; the emulsifier is a mixture of Tween-60, pesticide emulsifier 2201, and self-made emulsifier in a mass ratio of 1:1.2:0.8;

[0054] The preparation method of the self-made emulsifier is:

[0055] (1) 70 parts by weight of a linear C22 fatty alcohol, 0.06 parts by weight of gallic acid, 0.09 parts by weight of etidronic acid, and 0.7 parts by weight of sodium p-toluenesulfonate were mixed, heated to 130° C. with stirring, stirred for 20 minutes, and evacuated to −0.1 MPa to obtain a mixture A;

[0056] (2) heating 45 parts by weight of linear C22 fatty alcohol to 80° C., stirring for 20 min, adding 10 parts by weight of P2O5 and 13 parts by weight of metaphosphoric acid, and homogenizing at -0.1 MPa for 10 min to obtain a mixture B;

[0057] (3) Mixture B was added to mixture A in three portions, each time with an interval of 25 minutes. After the addition was completed, the reaction was continued at -0.1 MPa and 125° C. for 12 hours to obtain mixture C;

[0058] (4) The mixture C was cooled to 60°C, 10 parts by weight of deionized water was added for hydrolysis for 3 h, 7 parts by weight of 27 wt% H2O2 aqueous solution was added, the temperature was kept for 40 min, and then 5 parts by weight of NaHSO3 was added, the temperature was kept for 40 min, and the mixture was cooled and discharged to obtain a homemade emulsifier.

[0059] The thickener is a mixture of xanthan gum, magnesium aluminum silicate and sodium alginate in a mass ratio of 1:0.4:1.6.

[0060] The antifreeze agent is a mixture of polyethylene glycol, urea and sorbitol in a mass ratio of 0.2:1:1.6.

[0061] The defoamer is organic silicon defoamer HY-1572.

[0062] The dispersant is a mixture of phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate in a mass ratio of 1:1.9:0.5.

[0063] The wetting agent is a mixture of sodium dodecyl sulfate, sodium butyl naphthalene sulfonate and Tween-80 in a mass ratio of 1.5:1:0.8.

[0064] The preparation method of the insecticide composition is as follows: each component is mixed according to the formula amount, then mixed by a high-speed mixer, and sand-milled by a sand mill until the suspended particle size D98 is less than 1 μm, so as to obtain the insecticide composition.

[0065] Comparative Example 1

[0066] The difference between this comparative example and Example 1 is that 5 parts of imidacloprid, 2 parts of thiamethoxam, and 8 parts of fluopyram are replaced by 3 parts of imidacloprid, 6 parts of thiamethoxam, and 6 parts of fluopyram.

[0067] Comparative Example 2

[0068] The difference between this comparative example and Example 1 is that the emulsifier is a mixture of Tween-60, pesticide emulsifier 2201 and homemade emulsifier in a mass ratio of 1:1:1.

[0069] Comparative Example 3

[0070] The difference between this comparative example and Example 1 is that the emulsifier is a mixture of Tween-60, pesticide emulsifier 2201 and Span-60 in a mass ratio of 1:1.4:0.6.

[0071] Comparative Example 4

[0072] The difference between this comparative example and Example 1 is that the dispersant is a mixture of a phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate in a mass ratio of 1:1:1.

[0073] Comparative Example 5

[0074] The difference between this comparative example and Example 1 is that the dispersant is a mixture of sodium lignin sulfonate, dispersant NNO (CAS: 36290-04-7) and sodium dodecylnaphthalene sulfonate (CAS: 40382-75-0) in a mass ratio of 1:1.8:0.4.

[0075] Comparative Example 6

[0076] The difference between this comparative example and Example 1 is that the wetting agent is a mixture of sodium dodecyl sulfate, sodium butylnaphthalene sulfonate and Tween-80 in a mass ratio of 1:1:1.

[0077] Comparative Example 7

[0078] The difference between this comparative example and Example 1 is that the wetting agent is a mixture of calcium lignin sulfonate, sodium lignin sulfonate and fatty alcohol polyoxyethylene ether AEO-3 in a mass ratio of 1.6:1:0.7.

[0079] Comparative Example 8

[0080] The difference between this comparative example and Example 1 is that the antifreeze agent is ethylene glycol.

[0081] Performance Testing

[0082] 1. The performance of the insecticide compositions of Examples 1-2 and Comparative Examples 1-8 was measured.

[0083] The suspension rate was determined according to GB / T14825-2006 (the suspension rates of imidacloprid, thiamethoxam and fluopyram were averaged); the heat storage stability was determined according to GB / T19136-2003 (the suspension rates of imidacloprid, thiamethoxam and fluopyram were averaged); the low temperature stability was determined according to GB / T19137-2003; the dumping test was conducted according to HG-T2467.5-2003. The results are shown in Table 1.

[0084] Table 1 Performance test results

[0085]

[0086]

[0087] From the above performance test results, it can be seen that Examples 1-2 have high suspension rates and good high and low temperature resistance, especially Example 1 has the most outstanding comprehensive performance, which is mainly because the synergistic effect of multiple components improves the comprehensive performance.

[0088] However, the comparative examples did not adopt the necessary technical solutions, resulting in corresponding performance tests that were significantly worse than those of the embodiments. In comparative examples 2-3, the emulsifier composition was changed, and it can be seen that the suspension rate decreased, proving that the emulsifier solution has an important influence on the suspension rate effect. In comparative examples 4-5, the dispersant composition scheme was not used, and it can be seen from the results that the thermal storage stability was affected. The change of the dispersant further resulted in a decrease in the residual effect after pouring. The above experimental results further prove the importance of the technical solution defined in the present invention for its technical effect.

[0089] 2. Biological tests

[0090] For the insecticide compositions of Examples 1-2 and Comparative Example 1, the field efficacy will be investigated from two aspects: indoor germination rate and pest control efficacy. The investigation method is as follows:

[0091] (1) Take 100 seeds from each treatment to determine the germination rate. Indoor germination rate (%) = germinated seeds / total number of seeds mixed with seeds × 100%;

[0092] Observe whether there is any pesticide damage from seedling emergence to the end of the growth period;

[0093] At the 3-4 leaf stage after the seeds emerged, underground pests were investigated. All seedlings bitten or killed by peanut root-knot nematodes and white grubs were recorded as the number of seedlings injured by insects, and the insect control effect was calculated. The rate of seedlings injured by insects (%) = the number of seedlings injured by insects / the total number of investigated plants × 100%, and the insect control effect (%) = (the rate of seedlings injured by insects in the control area - the rate of seedlings injured by insects in the treatment area) / the rate of seedlings injured by insects in the control area × 100%. Clean water was used in the control area.

[0094] The insecticide composition of the embodiment and the comparative example was used for seed dressing at an effective ingredient of 20 g / mu, and the control was not treated. 100 peanut seeds were taken from each group for germination rate test.

[0095] (2) The experimental area is 66.7 m per cell. 2 , repeated 3 times; the method for investigating the efficacy after application of the pesticide is: randomly sampling 5 points in the experimental treatment area, investigating the number of insect-damaged seedlings according to the relevant standards of national field trials, and calculating the efficacy.

[0096]

[0097] The results are shown in Table 2.

[0098] Table 2 Germination rate and control effect of each treatment

[0099] Germination rate% Effectiveness% Example 1 96 85.3 Example 2 95 84.9 Comparative Example 1 92 76.3 Control group 93 Undetermined

[0100] As can be seen from Table 2, the insecticide composition of Example 1-2 is safe during seed germination, and has excellent effects on preventing and controlling peanut root-knot nematodes and grubs underground, indicating that the three active ingredients have a good synergistic effect after compounding. During the test, it was found that the insecticide composition caused no phytotoxicity to peanut seedlings, and it is safe for peanut crops. The ratio of the three active ingredients in Comparative Example 1 changes, and the germination rate is lower than that of Example 1-2, and the control effect is also significantly lower than that of Example 1-2, indicating that the three active components play a synergistic role under a specific ratio.

[0101] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An insecticide composition containing fluopyram, characterized in that: The invention comprises the following components in parts by mass: 4-6 parts of imidacloprid, 1-3 parts of thiamethoxam, 7-9 parts of fluopyram, 2-6 parts of dispersant, 1-3 parts of wetting agent, 5-7 parts of emulsifier, 0.2-0.8 parts of thickener, 3-5 parts of antifreeze agent, 0.1-0.2 parts of defoamer, and 40-45 parts of water; the emulsifier is a mixture of Tween-60, pesticide emulsifier 2201 and self-made emulsifier in a mass ratio of 1: (1.2-1.5): (0.5-0.8); The preparation method of the self-made emulsifier is: (1) 70 parts by weight of a linear C22 fatty alcohol, 0.06-0.09 parts by weight of gallic acid, 0.06-0.09 parts by weight of etidronic acid, and 0.7-0.8 parts by weight of sodium p-toluenesulfonate were mixed, heated to 125-130° C. with stirring, stirred for 20-30 minutes, and evacuated to −0.1 MPa to obtain a mixture A; (2) heating 45 parts by weight of linear C22 fatty alcohol to 75-80° C., stirring for 20-30 min, adding 8-10 parts by weight of P2O5 and 13-15 parts by weight of metaphosphoric acid, and homogenizing at -0.1 MPa for 5-10 min to obtain a mixture B; (3) Adding mixture B to mixture A rapidly in 3-5 times, with an interval of 20-25 minutes between each addition. After the addition is completed, the reaction is continued at -0.1 MPa and 125-130° C. for 9-12 hours to obtain mixture C; (4) Cooling the mixture C to 60-65°C, adding 10 parts by weight of deionized water to hydrolyze for 2-3 hours, adding 7 parts by weight of a 25-27 wt% H2O2 aqueous solution, keeping the temperature for 30-40 minutes, then adding 3-5 parts by weight of NaHSO3, keeping the temperature for 30-40 minutes, cooling and discharging to obtain a homemade emulsifier.

2. The insecticide composition containing fluopyram according to claim 1, characterized in that: The thickener is a mixture of xanthan gum, magnesium aluminum silicate and sodium alginate in a mass ratio of 1: (0.4-0.7): (1.3-1.6).

3. The insecticide composition containing fluopyram according to claim 1, characterized in that: The antifreeze agent is selected from one or more of polyethylene glycol, urea, sorbitol, ethylene glycol, and glycerol.

4. The insecticide composition containing fluopyram according to claim 3, characterized in that: The antifreeze agent is a mixture of polyethylene glycol, urea and sorbitol in a mass ratio of (0.2-0.6):1:(1.6-1.8).

5. The insecticide composition containing fluopyram according to claim 1, characterized in that: The defoamer is organic silicon defoamer HY-1572.

6. The insecticide composition containing fluopyram according to claim 1, characterized in that: The dispersant is a mixture of phosphate dispersant 1015, sodium dodecylbenzene sulfonate and sodium dodecyl sulfate in a mass ratio of 1: (1.7-1.9): (0.3-0.5).

7. The insecticide composition containing fluopyram according to claim 1, characterized in that: The wetting agent is a mixture of sodium dodecyl sulfate, sodium butyl naphthalene sulfonate and Tween-80 in a mass ratio of (1.5-1.7):1:(0.6-0.8).

8. The insecticide composition containing fluopyram according to claim 1, characterized in that: The preparation method of the insecticide composition is as follows: each component is mixed according to the formula amount, then mixed by a high-speed mixer, and sand-milled by a sand mill until the suspended particle size D98 is less than 1 μm, so as to obtain the insecticide composition.

9. Use of the insecticide composition containing fluopyram according to any one of claims 1 to 8, characterized in that: Used to control peanut root-knot nematodes and white grubs.

10. The use according to claim 9, characterized in that The application amount of the insecticide composition is 18-23 g of active ingredient per mu, and the active ingredients include imidacloprid, thiamethoxam and fluopyram.

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