An insecticide composition containing bromofenac and its application

Abstract

The present application relates to the technical field of pesticides and insecticides, and more particularly to a kind of insecticidal composition containing bromofenac flubendiamide and its application. A kind of insecticidal composition containing bromofenac flubendiamide, by mass fraction, includes the following preparation raw materials: 10-12 parts of insecticide active ingredients, 8-10 parts of emulsifiers, 20-24 parts of penetrants, 0.8-1.2 parts of xanthan gum, 1-3 parts of composite thickeners, 0.2-0.3 parts of antifreeze, 55-60 parts of solvents, wherein the insecticide active ingredients are prepared by mixing bromofenac flubendiamide and emamectin benzoate. The insecticidal composition containing bromofenac flubendiamide provided by the present application has the characteristics of small dosage, low cost and good drug efficacy, which can not only expand the insecticidal spectrum, but also delay pest resistance, and is environmentally friendly, and is a kind of efficient, economical and sustainable agricultural compound insecticide.

Description

Technical Field

[0001] The present application relates to the technical field of pesticides and insecticides, and in particular to an insecticidal composition containing brofenac and its application. Background Art

[0002] Brofenac is a diamide insecticide jointly developed by Mitsui Chemicals of Japan and BASF of Germany. It was approved for registration in my country in 2020. The insecticide is an allosteric modulator of γ-aminobutyric acid (GABA)-gated chloride channels, which causes insects to become overexcited and twitch. It can be used in field crops and cash crops such as corn, rice, fruit trees, vegetables, soybeans and cotton to control chewing mouthparts pests (including lepidoptera and coleoptera pests), such as diamondback moth, fall armyworm, flea beetles, etc. It has high larvicidal activity against lepidoptera pests, and also has good control effect against thrips, and can effectively control pests that are resistant to other insecticides. Brofenac can also be used for seed treatment, control of grain wireworms, etc., and can be used in special pest control fields, such as control of termites, ants, cockroaches, flies, etc.

[0003] Emamectin benzoate is avermectin benzoate, a macrolide disaccharide substance that paralyzes and kills insects by blocking the transmission of information through the motor nerves of pests. It is mainly a stomach poison, and also has a contact effect. It has no systemic effect on crops, but can effectively penetrate into the epidermal tissue of crops. Compared with the activity of avermectin, the biological activity of emamectin benzoate is higher.

[0004] In agricultural production, the application of chemical agents is the main means of preventing and controlling pests and diseases. However, due to the long-term use of chemical agents and the influence of factors such as unscientific use of drugs, the resistance of crop pests has become a global problem. Reasonable compounding of pesticides can expand the insecticide spectrum and delay pest resistance. If different ingredients with synergistic effects are reasonably compounded, the purpose of effectively preventing and controlling crop pests can be achieved. At the same time, improving the control effect by providing systemic absorption and permeability of the agent is also a problem that industry personnel must face. Therefore, the research and development of high-efficiency, low-toxic, and environmentally friendly pesticide compositions has a positive effect on the sustainable development of agriculture. Summary of the invention

[0005] The purpose of this application is to provide an insecticidal composition containing bromofenac, and to apply it to the preparation of agricultural compound insecticides with low dosage, low cost and good efficacy, so that it can not only expand the insecticide spectrum, but also delay the resistance of pests, and be environmentally friendly. The penetrant can improve the effect of the insecticide on plant leaves after the use of the insecticidal composition, increase the concentration of the insecticide in the part where the corn armyworm or cabbage worm bores, and increase the penetration performance and speed of the pesticide components, so as to significantly improve the control effect of the insecticidal composition containing bromofenac on the corn armyworm and cabbage worm.

[0006] In the first aspect, the present application provides an insecticidal composition containing bromofenac, which adopts the following technical scheme:

[0007] An insecticide composition containing brofenac, comprising the following raw materials by weight: 10-12 parts of insecticide active ingredients, 8-10 parts of emulsifiers, 20-24 parts of penetrants, 0.8-1.2 parts of xanthan gum, 1-3 parts of composite thickeners, 0.2-0.3 parts of antifreeze agents, and 55-60 parts of solvents, wherein the insecticide active ingredients are prepared by mixing brofenac and emamectin benzoate.

[0008] By adopting the above technical scheme, the active ingredients of the insecticide: bromobenzene and emamectin benzoate are the core active ingredients of the present application. These ingredients each have different insecticidal mechanisms. When they are mixed, they can produce a synergistic effect, improve the control effect, reduce the amount of a single ingredient, and thus reduce costs. This combination can not only expand the insecticide spectrum, but also delay the development of pest resistance. Emulsifier: The role of the emulsifier is to help the active ingredients disperse evenly in water to form a stable emulsion. This helps to improve the stability and adhesion of the agent, ensuring that the agent can be evenly distributed on the surface of the plant and lastingly play a role. Penetrant: The penetrant can reduce the surface tension of the liquid medicine, making it easier to expand and penetrate on the leaves of the plant. This can increase the effect of the pesticide components gathering on the corn leaves, increase the concentration of the agent in the drilling site of the corn armyworm, and significantly improve the control effect. Xanthan gum, as a natural high molecular weight polysaccharide, has good thickening and stability. It can increase the viscosity of the composition, so that the agent can better adhere to the plant surface during application, reduce loss, and improve the efficacy. Composite thickener: The composite thickener can absorb a large amount of active ingredients of the insecticide, so that it can better adhere to the leaves and stems of corn during the application process. This not only improves the safety of corn, but also enhances the control effect on fall armyworm, while reducing the dosage of the agent. Antifreeze: The addition of antifreeze is to protect the stability of the composition under low temperature conditions and prevent the crystallization or stratification of components caused by too low temperature. Solvents are used to dissolve and dilute active ingredients and other solid ingredients in order to prepare a uniform liquid preparation. Selecting a suitable solvent can improve the stability and bioavailability of the agent. In summary, the insecticide composition in this application achieves multi-faceted synergy by carefully selecting and proportioning various ingredients, which not only improves the insecticidal effect and reduces costs, but also enhances environmental friendliness, and meets the development requirements of modern pesticide formulations.

[0009] Preferably, the mass ratio of brofenac and emamectin benzoate is (3-5):(2-3).

[0010] Preferably, the mass ratio of brofenac to emamectin benzoate is 3:2.2.

[0011] By adopting the above technical scheme, bromofenac: This is an effective insecticide, mainly used to control various lepidopteran pests, such as fall armyworm, cabbage worm, etc. Its mechanism of action is to inhibit acetylcholinesterase in the insect nervous system, resulting in obstruction of insect nerve conduction and ultimately death of the insect. Emamectin benzoate is emamectin benzoate, a macrolide disaccharide substance, which paralyzes the insect body and kills it by blocking the transmission of information from the motor nerves of the pest. The mode of action is mainly stomach poison, and it also has a contact effect. It has no systemic effect on crops, but can effectively penetrate into the epidermal tissue of the applied crops. Compounds with different mechanisms of action are compounded in a specific ratio, which can effectively delay the development of pest resistance and extend the service life of the agent. This is of great significance in integrated pest management and helps maintain the long-term effectiveness of pesticides. In summary, the specific ratio of bromofenac and emamectin benzoate mixing not only improves the insecticidal effect and reduces costs, but also helps delay the development of pest resistance. It is safe and friendly to the environment and crops, and is a new type of highly effective agricultural compound insecticide.

[0012] Preferably, the preparation method of the composite thickener comprises the following steps:

[0013] S41, according to the mass parts, chitosan, citric acid, xanthan gum and white carbon black are added into an ultrafine grinder and mixed and crushed evenly to obtain chitosan mother powder;

[0014] S42. According to the mass proportions, 100 parts of chitosan mother powder and 50 parts of magnesium aluminum silicate are added into an ultrafine grinder for pulverization and mixing, and 35 parts of deionized water are added into an extrusion granulator for granulation and grinding to obtain a composite thickener with a particle size of 5-10 μm.

[0015] By adopting the above technical scheme, the prepared composite thickener can absorb a large amount of active ingredients of the insecticide, so that it can better adhere to the leaf and stem surfaces of corn during the application process, thereby improving the safety of the insecticide composition containing bromofenac to corn, improving the control effect on fall armyworm and reducing the amount of pesticide used.

[0016] Preferably, the mass ratio of chitosan, citric acid, xanthan gum and white carbon black is 90:2:2:6.

[0017] Preferably, the emulsifier is prepared by mixing calcium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether and sorbitan fatty acid ester in a mass ratio of 5:4:4.

[0018] Preferably, the penetrant is prepared by mixing a modified polysiloxane surfactant, sodium dioctyl maleate sulfonate and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a mass ratio of 3:2:3.

[0019] By adopting the above technical scheme, in the insecticidal composition of the present invention, the role of the penetrant is crucial. It is prepared by mixing modified polysiloxane surfactant, sodium diisooctyl maleate sulfonate and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a mass ratio of 3:2:3. There is a synergistic effect between these three components, which jointly promote the penetration performance and speed of the pesticide, thereby improving the insecticidal effect. The modified polysiloxane surfactant has excellent wettability and permeability, can reduce the surface tension of the liquid medicine, and make the medicine easier to expand and penetrate on the leaf and stem surfaces of plants. As an anionic surfactant, sodium diisooctyl maleate sulfonate also has good wettability and permeability, and can synergize with the modified polysiloxane surfactant to further improve the penetration performance of the medicine. Sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate is a nonionic surfactant with strong emulsification and dispersing effects, which helps to evenly distribute the medicine on the surface of the plant. By mixing these three surfactants in a specific ratio, a penetrant with excellent penetration performance can be obtained. After adding this penetrant to the insecticide composition, the effect of the agent on the corn leaves can be significantly improved, the concentration of the agent in the parts where the corn armyworm bores can be increased, and the penetration performance and speed of the pesticide components can be increased, thereby significantly improving the control effect of the insecticide composition containing brofenthranil on the corn armyworm.

[0020] Preferably, the preparation method of the modified polysiloxane surfactant is as follows: under nitrogen protection, 4 mmol of methyl stearate, 2 mmol of 1,1,1,3,5,5,5-heptamethyltrisiloxane, 0.1 mmol of catalyst nano Au / TiO 2 After being stirred evenly with 5 mL of toluene, the mixture was heated to 135°C, reacted for 10 h, and then distilled under reduced pressure to obtain a modified polysiloxane surfactant. 2 The Au mass content is 5%.

[0021] By adopting the above technical scheme, the effect and synergistic effect of the prepared modified polysiloxane surfactant are mainly reflected in the following aspects: Improving the effect of the drug aggregation to corn leaves: The penetrant can improve the effect of the drug aggregation to corn leaves after the insecticide composition is used, increase the concentration of the drug in the drilling part of the corn fall armyworm, and increase the penetration performance and speed of the pesticide components, significantly improving the control effect of the insecticide composition containing bromofenac on the corn fall armyworm. Increase the penetration performance and speed of pesticide components: The modified polysiloxane surfactant can reduce the surface tension of the liquid, making it very easy to expand and penetrate, thereby significantly improving the ability of directional aggregation and insect hole penetration, and further increasing the penetration performance and speed of the pesticide components. Improve the safety of the insecticide composition containing bromofenac to corn: The composite thickener can absorb a large amount of active ingredients of the insecticide, so that it can better adhere to the leaf and stem surfaces of corn during the application process, and improve the safety of the insecticide composition containing bromofenac to corn. Reduce the amount of pesticides used: Due to the presence of modified polysiloxane surfactants, the conductivity of pesticides can be effectively improved, the amount of active ingredients can be reduced, and the cost can be reduced. In short, the modified polysiloxane surfactant plays a key role in the insecticide composition of the present application, and significantly improves the control effect of the insecticide composition by improving the effect of the pesticide on the corn leaves, increasing the penetration performance and speed of the pesticide components, improving the safety of the insecticide composition containing bromofenac to corn, and reducing the amount of pesticides used.

[0022] Preferably, the antifreeze agent is ethylene glycol, and the solvent is first-grade soybean salad oil.

[0023] In a second aspect, the present application provides an application of an insecticidal composition containing bromofenac, using the following technical solution:

[0024] As a general technical concept, the present application also provides the use of the above-mentioned insecticidal composition containing bromofenac in controlling agricultural pests, wherein the pests include pests on corn, vegetables, rice or fruit crops, preferably fall armyworm or cabbage looper.

[0025] In summary, the beneficial technical effects of this application are:

[0026] 1. Improve the insecticide spectrum and efficacy: By combining the two active ingredients of bromofenac and emamectin benzoate and utilizing their synergistic effect, not only the insecticide spectrum is expanded, but also the control effect on pests such as fall armyworm and cabbage worm is significantly improved. This combination can provide effective control for a variety of pests, increasing the application range and practicality of pesticides.

[0027] 2. Delaying the development of insecticide resistance: Since the insecticide composition uses compounds with different mechanisms of action in a specific ratio, it can effectively delay the development of insecticide resistance and extend the service life of the agent. This is crucial for maintaining the healthy growth of crops in the long term because it helps avoid the problem of insects quickly developing resistance to a single chemical component.

[0028] 3. Environmental friendliness and safety: The insecticide composition is safe for crops and friendly to the environment, and meets the safety requirements of pesticide formulations. This means that while effectively controlling pests, it will not cause damage to crops or adverse effects on the environment, ensuring the sustainability of agricultural production and ecological balance.

[0029] 4. Improve the aggregation and penetration of pesticides: By using penetrants and modified polysiloxane surfactants, the effect of pesticides on corn leaves is significantly improved, and the concentration of pesticides in the areas where corn fall armyworms bore is increased. This helps to increase the penetration performance and speed of pesticide ingredients, thereby improving the control effect of insecticide compositions containing brofenac on pests.

[0030] 5. Reduced drug costs: Since the insecticide composition has excellent control effects, the amount of active ingredients can be reduced, thereby reducing costs. This is an important economic benefit for farmers because it means reducing inputs while ensuring control effects.

[0031] 6. Improved safety and convenience: The use of composite thickeners enables the insecticide composition to better adhere to the leaves and stems of corn, improving the safety and convenience during application, while also improving the safety and control effect on corn. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below in conjunction with the examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. In the examples, if specific conditions are not specified, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0033] In the following examples and preparation examples, 1 part means 50 g.

[0034] Preparation Example 1 Preparation of composite thickener

[0035] The preparation method of the composite thickener comprises the following steps:

[0036] S41, according to the mass parts, add 90 parts of chitosan, 2 parts of citric acid, 2 parts of xanthan gum and 6 parts of white carbon black into an ultrafine grinder, mix and grind evenly to obtain chitosan mother powder;

[0037] S42. According to the mass proportions, 100 parts of chitosan mother powder and 50 parts of magnesium aluminum silicate are added into an ultrafine grinder for pulverization and mixing, and 35 parts of deionized water are added into an extrusion granulator for granulation and grinding to obtain a composite thickener with a particle size of 5-10 μm.

[0038] Preparation Example 2 Preparation of modified polysiloxane surfactant

[0039] The preparation method of the modified polysiloxane surfactant is as follows: under nitrogen protection, 4 mmol of methyl stearate, 2 mmol of 1,1,1,3,5,5,5-heptamethyltrisiloxane, and 0.1 mmol of catalyst nano Au / TiO 2 After being stirred evenly with 5 mL of toluene, the mixture was heated to 135°C, reacted for 10 h, and then distilled under reduced pressure to obtain a modified polysiloxane surfactant. 2 The Au mass content is 5%. Example 1

[0040] The invention discloses an insecticide composition containing brofenoxamide, which comprises the following raw materials by weight: 10 parts of insecticide active ingredients, 8 parts of emulsifiers, 20 parts of penetrants, 0.8 parts of xanthan gum, 1 part of composite thickener, 0.2 parts of ethylene glycol and 55 parts of first-grade soybean salad oil, wherein the insecticide active ingredients are prepared by mixing brofenoxamide and emamectin benzoate in a weight ratio of 3:2, the emulsifier is prepared by mixing calcium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether and sorbitan fatty acid ester in a weight ratio of 5:4:4, and the penetrant is prepared by mixing modified polysiloxane surfactant, sodium dioctyl maleate sulfonate and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a weight ratio of 3:2:3. Example 2

[0041] The invention discloses an insecticide composition containing brofenac, which comprises the following raw materials by weight: 12 parts of insecticide active ingredients, 10 parts of emulsifier, 24 parts of penetrant, 1.2 parts of xanthan gum, 3 parts of composite thickener, 0.3 parts of ethylene glycol and 60 parts of first-grade soybean salad oil, wherein the insecticide active ingredient is prepared by mixing brofenac and emamectin benzoate in a weight ratio of 5:3, the emulsifier is prepared by mixing calcium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether and sorbitan fatty acid ester in a weight ratio of 5:4:4, and the penetrant is prepared by mixing modified polysiloxane surfactant, sodium dioctyl maleate sulfonate and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a weight ratio of 3:2:3. Example 3

[0042] The invention discloses an insecticide composition containing brofenac, which comprises the following raw materials by weight: 11 parts of insecticide active ingredients, 9 parts of emulsifiers, 22 parts of penetrants, 1 part of xanthan gum, 2 parts of composite thickeners, 0.25 parts of ethylene glycol and 58 parts of first-grade soybean salad oil, wherein the insecticide active ingredients are prepared by mixing brofenac and emamectin benzoate in a weight ratio of 4:2.5, the emulsifier is prepared by mixing calcium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether and sorbitan fatty acid ester in a weight ratio of 5:4:4, and the penetrant is prepared by mixing modified polysiloxane surfactant, sodium dioctyl maleate sulfonate and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a weight ratio of 3:2:3. Example 4

[0043] The same as Example 3, except that the insecticide active ingredient is prepared by mixing bromofenac and emamectin benzoate in a mass ratio of 3:2.2.

[0044] Comparative Example 1

[0045] The same as Example 4, except that an equal amount of organic bentonite is used instead of the composite thickener.

[0046] Comparative Example 2

[0047] The same as Example 4, except that the penetrant is a modified polysiloxane surfactant.

[0048] Comparative Example 3

[0049] The same as Example 4, except that the penetrant is sodium diisooctyl sulfonate maleate.

[0050] Comparative Example 4

[0051] The same as Example 4, except that the penetrant is alkylphenol polyoxyethylene ether formaldehyde condensate sodium sulfate.

[0052] Performance Testing

[0053] 1. The field control efficacy of the insecticidal compositions containing bromofenac prepared in Examples 1 to 4 and Comparative Examples 1 to 4 against fall armyworm was measured respectively;

[0054] Test subjects: Fall armyworm;

[0055] Test method: The pesticide was applied during the small trumpet stage of corn. The fall armyworm was moderately harmful, the insect population density was moderate, and the insect age was mostly young, which could meet the requirements of field efficacy test. The test was arranged in random blocks, with protection rows set around. The test set up 8 pesticide treatment areas, corresponding to the preparations of Examples 1 to 4 and Comparative Examples 1 to 4, each treatment was repeated 4 times, and a clear water control was set. Each plot was 67m 2 Before spraying, the insect population was investigated. The five-point sampling method was used. Ten plants were continuously investigated at each point. A total of 50 corn plants were investigated in each plot and marked. The ZL-16DA backpack electric sprayer was used for uniform spraying. Each pesticide treatment was carried out at a rate of 10000 per 667m 2 40 kg of water was used to spray each plot evenly, and 2.5 ml of the insecticide composition containing bromofenac was added to each 40 kg of water. No other pesticides were used during the test. The insect population was investigated 1, 3, 7, and 14 days after the application of the pesticide, and the insect population reduction rate and the corrected control effect were calculated.

[0056]

[0057]

[0058] The test results are shown in Table 1.

[0059] Table 1 Field control effect determination on fall armyworm

[0060]

[0061] 2. The field control efficacy of the insecticidal compositions containing bromofenac prepared in Examples 1 to 4 and Comparative Examples 1 to 4 against cabbage loopers was measured;

[0062] Test subjects: Pieris rapae;

[0063] Test method: The row spacing of cabbage cultivation was 40cm×60cm, and the growth period of cabbage during the test was the rosette stage. The pesticide was applied in the evening when the cabbage worm was in the early larvae (1-2 years old). The test was arranged in random blocks, with protection rows set around. The test set up 8 pesticide treatment areas, corresponding to the preparations of Examples 1-4 and Comparative Examples 1-4, each treatment was repeated 4 times, and a clear water control was set. Each plot was 30m 2 Before spraying, the insect population was investigated. The five-point sampling method was used. Three adjacent cabbages were investigated at each sampling point. A fixed-point and fixed-plant investigation was carried out. A ZL-16DA backpack electric sprayer was used for uniform spraying. Each treatment was carried out at a rate of 1000 tonnes per 667 m 230kg of water was used to spray each plot evenly, and 2.5ml of the insecticide composition containing bromofenac was added to every 30kg of water. No other pesticides were used during the test. The insect population was investigated 1, 3, 7, and 14 days after the application of the pesticide, and the insect population reduction rate and corrected control effect were calculated.

[0064]

[0065]

[0066] The test results are shown in Table 2;

[0067] Table 2 Field control effectiveness against cabbage worm

[0068]

[0069] Analyzing the data in Table 1 and Table 2, we can see that:

[0070] 1) The insecticide composition containing brofenac prepared in Examples 1 to 4 can not only expand the insecticide spectrum, but also delay the insecticide resistance and be environmentally friendly. The penetrant can enhance the effect of the insecticide on the corn leaves after the insecticide composition is used, increase the concentration of the insecticide in the part where the corn armyworm bores, and increase the penetration performance and speed of the pesticide components, thereby significantly improving the control effect of the insecticide composition containing brofenac on the corn armyworm and cabbage looper.

[0071] 2) The comparative analysis of the performance of the insecticidal composition containing brofenoxamide prepared in combination with Example 4 and Comparative Example 1 shows that the composite thickener prepared in the present application can adsorb a large amount of active ingredients of the insecticide, so that it can better adhere to the leaf and stem surfaces of corn during application, thereby improving the safety of the insecticidal composition containing brofenoxamide to corn, and the control effect on fall armyworm and cabbage looper and reducing the dosage of the agent.

[0072] 3) The performance comparison analysis of the insecticidal composition containing bromobenzene diamide prepared in combination with Example 4 and Comparative Examples 2-4 shows that the penetrant is prepared by mixing modified polysiloxane surfactant, sodium diisooctyl maleate sulfonate and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a mass ratio of 3:2:3. There is a synergistic effect between these three components, which jointly promotes the penetration performance and speed of the pesticide, thereby improving the insecticidal effect. The modified polysiloxane surfactant has excellent wettability and permeability, can reduce the surface tension of the liquid, and make the agent easier to expand and penetrate on the leaf and stem surfaces of plants. As an anionic surfactant, sodium diisooctyl maleate sulfonate also has good wettability and permeability, and can synergize with the modified polysiloxane surfactant to further improve the penetration performance of the agent. Sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate is a nonionic surfactant with strong emulsification and dispersing effects, which helps to evenly distribute the agent on the surface of the plant. By mixing these three surfactants in a specific ratio, a penetrant with excellent penetration performance can be obtained. After adding this penetrant to the insecticide composition, the effect of the pesticide on the corn leaves can be significantly improved, the concentration of the pesticide in the part where the corn armyworm bores can be increased, and the penetration performance and speed of the pesticide components can be increased, thereby significantly improving the control effect of the insecticide composition containing brofenoxamide on the corn armyworm and cabbage worm.

[0073] The above embodiments are only used to explain the technical solutions of the present application rather than to limit them. Although the above embodiments provide a specific description of the present application, relevant technical personnel should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modifications and equivalent replacements that do not depart from the spirit and scope of the present application should be included in the scope of protection of the present application.

Claims

1. An insecticidal composition containing bromofenac, characterized in that: The preparation method comprises the following raw materials by weight: 10-12 parts of insecticide active ingredients, 8-10 parts of emulsifiers, 20-24 parts of penetrants, 0.8-1.2 parts of xanthan gum, 1-3 parts of composite thickeners, 0.2-0.3 parts of antifreeze agents, and 55-60 parts of solvents, wherein the insecticide active ingredients are prepared by mixing bromofenac and emamectin benzoate in a weight ratio of (3-5):(2-3); the penetrant is prepared by mixing modified polysiloxane surfactants, sodium dioctyl maleate sulfonate, and sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate in a weight ratio of 3:2:3; The preparation method of the modified polysiloxane surfactant is as follows: under nitrogen protection, 4mmol of methyl stearate, 2mmol of 1,1,1,3,5,5,5-heptamethyltrisiloxane, 0.1mmol of catalyst nano Au / TiO2 and 5mL of toluene are added into a reactor equipped with a stirrer, the mixture is stirred evenly, and the temperature is raised to 135° C. After reacting for 10 hours, the mixture is distilled under reduced pressure to obtain the modified polysiloxane surfactant, wherein the mass content of Au in the catalyst nano Au / TiO2 is 5%; The preparation method of the composite thickener comprises the following steps: S41, according to the mass fractions, adding chitosan, citric acid, xanthan gum and white carbon black into an ultrafine grinder, mixing and grinding them uniformly, to obtain chitosan mother powder; wherein the mass fraction ratio of the chitosan, citric acid, xanthan gum and white carbon black is 90:2:2:6; S42, according to the mass fraction, 100 parts of chitosan mother powder and 50 parts of magnesium aluminum silicate were added into an ultrafine grinder for pulverization and mixing, and 35 parts of deionized water were added into an extrusion granulator for granulation, and ground to obtain a composite thickener with a particle size of 5-10 μm; The emulsifier is prepared by mixing calcium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether and sorbitan fatty acid ester in a mass ratio of 5:4:

4.

2. An insecticidal composition containing brofenoxamide according to claim 1, characterized in that: The mass ratio of brofenac and emamectin benzoate is 3:2.

2.

3. An insecticidal composition containing bromofenac as claimed in claim 1, characterized in that: The antifreeze agent is ethylene glycol, and the solvent is first-grade soybean salad oil.

4. Use of an insecticidal composition containing bromofenac as claimed in any one of claims 1 to 3 in controlling agricultural pests, characterized in that: The pests are fall armyworm or cabbage looper.

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