Efficient insecticidal smoke agent composition as well as preparation method and application thereof

Abstract

The invention relates to the field of agricultural insecticide, in particular to a high-efficiency insecticidal smoke agent composition as well as a preparation method and application thereof, and solves the problems that different insecticides are different in heat resistance, pesticides with poor heat resistance are easily influenced by fuels during composite use so as to lose partial activity, and smoke agents are poor in adhesion in a relatively high-humidity environment, so that the smoke agents are not liable to be damaged. The problem that the insect pest prevention effect becomes poor due to the fact that the composite intercalation main agent is prone to being affected by ventilation in the prior art is solved, the composite intercalation main agent is prepared from 55-65 parts by weight of a heat supply agent and 20-30 parts by weight of a composite intercalation main agent, the composite intercalation main agent is prepared from a nanosheet layer material, an active main agent and a fuming auxiliary agent, and the heat supply agent is prepared from stearate, a strong oxygen supply agent, fuel and the fuming auxiliary agent. The strong oxygen supply agent is one of potassium perchlorate, potassium dichromate and sodium dichloroisocyanurate. When different heat-resistant pesticides are compounded and used, the pesticide activity can be guaranteed while the good fuming effect is guaranteed, the adhesiveness of pesticide smoke agent particles is improved, and the pesticide smoke agent particles are not prone to being affected by ventilation and other operations.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural insecticide, and in particular to a high-efficiency insecticide smoke composition and a preparation method and application thereof. Background Art

[0002] Insecticidal smoke compositions are usually composed of a main agent containing active ingredients and a heat-supplying agent. The main agent is generally a biologically active pesticide original drug. The heat-supplying agent is composed of an oxidant, a fuel, and an auxiliary agent. The combustion-aiding agent is the main component of the smoke agent and constitutes the heat-generating agent part of the smoke agent with the fuel. The smoke-generating auxiliary agent can promote the formation of smoke by the active ingredients of the pesticide and assist its drift or sedimentation. Related studies have found that the smoke-generating auxiliary agent can increase the smoke-forming rate of the smoke agent, thereby indirectly improving the efficacy of the drug. The active ingredients of the drug and the carrier smoke form aerosol particles, which are attached to the surface of the target object.

[0003] However, the existing fast-acting smoke agents have small particles and are easy to drift. The humidity in the greenhouse is high and ventilation is required to control the humidity. As a result, a large amount of smoke agents cannot be effectively retained for a long time, and the prevention and control effect is not ideal. They cannot adhere well to the surface of organisms. Therefore, a large amount of smoke agents will be lost during ventilation and dehumidification, resulting in interruption of prevention and control.

[0004] Existing methods for preparing smoke agents include direct mixing method, in which pesticides are directly mixed with fuel and auxiliary agents for combustion, which is suitable for pesticides with stable properties and do not react with heat-supplying agents; the second is isolation method: suitable for pesticides that are liquid at room temperature and have low vapor pressure, and the outside of the pesticide is isolated from the fuel, but a small amount of pesticides still lose activity during combustion, and the control effect is poor; the third is layering method, which is suitable for placing the processed heat-supplying agent at the bottom of the packaging tube and the main pesticide at the top of the packaging tube during packaging. This method is suitable for some flammable and easily decomposable low-melting waxy or solid pesticides, but because this method and the smoke-generating auxiliary agent cannot contact the fuel well, the dispersion effect is poor, the control effect is very unclear, and the electrostatic dispersion and sedimentation phenomenon between particles are poor.

[0005] Moreover, when composite smoke agents for multiple insect pests are used in combination, it is found that due to the different temperature stabilities of different pesticides, they cannot volatilize well. Under the influence of each other, a single agent is needed to remove certain insect pests, resulting in slow prevention and unsatisfactory effects. Some drugs have poor stability and need to lower the smoke generation temperature and shorten the smoke generation time. Summary of the invention

[0006] In order to solve the problems that different insecticides have different heat resistances, the pesticides with poor heat resistance are easily affected by fuel when used in combination, thereby losing part of their activity, and the smoke agent has poor adhesion in a high humidity environment and is easily affected by ventilation, resulting in poor pest prevention effect, the present invention provides a high-efficiency insecticidal smoke agent composition and a preparation method thereof. The technical scheme adopted by the present invention is as follows:

[0007] A high-efficiency insecticidal smoke composition, characterized in that the composition is composed of 55-65 parts by weight of a heat supply agent and 20-30 parts by weight of a composite intercalation main agent, wherein the composite intercalation main agent is composed of a nanosheet material, an active main agent and a smoke-generating auxiliary agent, the heat supply agent comprises stearate, a strong oxygen supply agent, a fuel and a smoke-generating auxiliary agent, the active main agent is composed of 4-(trifluoromethyl) nicotinamide, pyrethrin and pyridaben, and the strong oxygen supply agent is one of potassium perchlorate, potassium dichromate and sodium dichloroisocyanurate;

[0008] The preparation steps of the composite intercalation main agent are as follows:

[0009] The sheet material is crushed into nanosheet material by mechanical method, and then the active main agent is dispersed in organic solution to form a treatment solution, and then the crushed nanosheet material is placed in the treatment solution for ultrasonic treatment and heating operation, and finally dried and washed to obtain a dry precursor, and then the precursor is immersed in a solution of a smoke-generating aid, the solvent is removed and dried to obtain a composite intercalation main agent.

[0010] The present application reduces the influence of temperature on active drugs by using a composite intercalation main agent. In the process of preparing the composite intercalation main agent, the special structure and properties of the nanosheet material are used to allow pyrethrin and pyridaben to act on the sheet plane of graphene through physical adsorption and chemical adsorption, and then stably exist between the nanosheet materials under the action of van der Waals force and hydrogen bond, thereby facilitating the subsequent storage and release of drugs. The presence of the nanosheet material effectively separates the high temperature of the fuel and the active drugs. The jet-like smoke formed by the fuel and the smoke-generating aid releases the nanosheet material, and the smoke-generating aid located outside the nanosheet material is vaporized after being affected by heat energy, thereby forming a secondary dispersion effect on the nanosheet material and the drug main agent, thereby ensuring the normal killing of insects by the drugs after subsequent release, thereby improving the insecticidal effect of drugs with different stabilities.

[0011] The present application also uses stearate and strong oxygen supply agents potassium perchlorate, potassium dichromate and sodium dichloroisocyanurate to greatly increase the smoke volume, so that the nano-composite sheet material and the drug main agent can be more effectively released in the form of a spray to achieve a better dispersion effect. In addition to providing the role of small solid particles in the smoke generation process, the stearate also enhances the viscosity of the composite intercalation main agent and the plant surface, and the drug will not be lost due to ventilation and being entrained by airflow.

[0012] The 4-(trifluoromethyl)nicotinamide used in the present application is a metabolite of flonicamid, has insecticidal activity, and can effectively prevent and control mosquitoes, cotton aphids, whiteflies, rice brown planthoppers, etc.

[0013] Preferably, the stearate is one of calcium stearate, zinc stearate or magnesium stearate, and the smoking aid is ammonium chloride or naphthalene.

[0014] Calcium stearate has the highest viscosity, zinc stearate has the largest smoke production, and magnesium stearate is moderate.

[0015] Preferably, the component ratio of the stearate, the strong oxygen supply agent, the fuel and the smoke-generating aid is 1-2:2-3:5:3 by weight.

[0016] The present application achieves the best smoke-generating effect by controlling the content of stearate. Too much stearate will lead to larger smoke particles and too fast sedimentation rate. Too little stearate will lead to unclear smoke-generating effect and the composite intercalation main agent cannot be effectively dispersed.

[0017] Preferably, the component ratio of 4-(trifluoromethyl)nicotinamide, pyrethrin and pyridaben in the active main agent is 2:2-5:1-3 by weight.

[0018] Preferably, in the step of preparing the composite intercalant, the nanosheet material is one of graphene, mica, silicon nanosheets or hexagonal boron nitride.

[0019] Preferably, the weight ratio of the nanosheet material to the active main agent in the composite intercalation main agent is 10:3-7, and the smoking aid in the composite intercalation main agent accounts for 25% of the total smoking aid.

[0020] Preferably, the organic solvent is one of ethanol, petroleum ether or methanol, and the solvent in the solution of the smoking aid is one of water, ethanol, methanol or petroleum ether.

[0021] In the present application, if ammonium chloride is used as the smoking aid, water is used for dissolution; if naphthalene is used as the smoking aid, ethanol, methanol or petroleum ether is used as the solvent.

[0022] The present application also provides a method for preparing a highly effective insecticidal smoke composition, and the specific preparation steps are as follows:

[0023] S1. Mix 75 parts by weight of fuming agent with 4-(trifluoromethyl)nicotinamide to form powder A. Then grind and crush the fuel and stir-fry it to an anhydrous state. Mix the fuel with powder A to obtain powder B, and place powder B at the bottom of a cylindrical barrel and compact it.

[0024] S2. Prepare pyrethrins into a composite intercalation host agent, and then mix it with corresponding stearates and strong oxygen-supplying agents to form powder C, and place it on top of powder B.

[0025] S3. Prepare pyridaben into a composite intercalation host agent, and then mix it with corresponding stearates and strong oxygen-supplying agents and place it on top of powder C. After compaction, a high-efficiency insecticidal smoke agent composition is obtained.

[0026] In the process of preparing the insecticidal smoke agent in this application, the mixing method and the layering method are used simultaneously, which can not only ensure the efficient dispersion of pyrethrins and pyridaben, but also further retain their biological activities and enhance the killing effect.

[0027] Preferably, the fuel is one of wood chips, pulverized coal or wood flour starch.

[0028] A high-efficiency insecticidal smoke agent composition of this application can be applied to indoor greenhouses and forest environments with relatively high water content.

[0029] The beneficial effects of the present invention are as follows:

[0030] In this application, the drug host agent is wrapped with nanosheet materials to prevent the drug preparation from directly contacting the direct combustion of fuels and oxidizing agents and other additives, and a layer of fuming agent is formed on the outside by dissolving and drying, so as to help the release of the drug host agent in the nanosheet materials. However, too large composite nanosheet materials require a greater spraying effect. Therefore, this application uses the cooperation of stearates and strong oxidants to form a huge amount of smoke, so as to better spray out the composite intercalation host agent, make it disperse more evenly and finely, so as to achieve a better killing effect and stabilize the properties of the active host agent.

[0031] In this application, the active host agent with a low ignition point is sandwiched between the layers of nanosheet materials, and then ammonium chloride, a fuming agent, is coated on the outside, so that ammonium chloride sprays out of the layered graphite, and then the low-ignition-point drug is redispersed in the air, thereby protecting the drug property and enhancing the insecticidal effect of the drug. Description of the Drawings

[0032] Figure 1 It is a line graph comparing the insecticidal lethality rates of the examples and comparative examples of the present invention. Detailed Embodiments

[0033] Next, reference will be made to the reference appendix Figure 1The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0034] Preparation Example 1

[0035] Preparation of composite intercalation agent

[0036] 10 parts of graphene are prepared into nanographene with a thickness of 10-30 nm and a number of 10-100 layers by ball milling;

[0037] Then, 3 parts by weight of pyrethrin and 2 parts by weight of pyrethrin are dissolved in ethanol to obtain pyrethrin treatment solution and pyrethrin treatment solution, and the amount of organic solvent used is just enough to dissolve the pyrethrin;

[0038] Then the nanographene was divided into two parts according to a weight ratio of 3:2, and respectively placed in a pyrethrin treatment solution and a pyridabenzyl treatment solution, and then subjected to ultrasonic treatment at an ultrasonic power of 200 W. The organic solvent was removed by heating and drying, and then the nanographene was rinsed with cold water and dried with hot air to obtain a pyrethrin precursor and a pyridabenzyl precursor.

[0039] 5 parts of ammonium chloride are placed in water, enough to submerge the pyrethrin precursor and the pyridaben precursor, to form a dissolving solution, and the pyrethrin precursor and the pyridaben precursor are respectively placed in the dissolving solution with corresponding weight ratios for immersion, and the solution is slowly removed by heating to obtain a composite intercalation main agent.

[0040] Preparation Example 2

[0041] Preparation of composite intercalation agent

[0042] 10 parts of mica are prepared into nano mica sheets with a thickness of 100-200 nm and 40-200 layers by ball milling;

[0043] Then, 2 parts by weight of pyrethrin and 1 part by weight of pyrethrin are dissolved in petroleum ether to obtain pyrethrin treatment solution and pyrethrin treatment solution, and the amount of organic solvent used is just enough to dissolve the pyrethrin;

[0044] Then the nano-mica sheets were divided into two parts according to a weight ratio of 2:1, and were placed in a pyrethrin treatment solution and a pyridabenzyl treatment solution respectively, and then subjected to ultrasonic treatment with an ultrasonic power of 200 W. The organic solvent was removed by heating and drying, and then the nano-mica sheets were rinsed with cold water and dried with hot air to obtain a pyrethrin precursor and a pyridabenzyl precursor.

[0045] 5 parts of naphthalene are placed in ethanol, enough to submerge the pyrethrin precursor and the pyridaben precursor, to form a dissolving solution, and the pyrethrin precursor and the pyridaben precursor are respectively placed in the dissolving solution with corresponding weight ratios for immersion, and the solution is slowly removed by heating to obtain a composite intercalation main agent.

[0046] Preparation Example 3

[0047] Preparation of composite intercalation agent

[0048] 15 portions of silicon nanosheets are prepared by ball milling to form silicon nanosheets with a thickness of 20-60 nm and a number of 30-180 layers;

[0049] Then, 6 parts by weight of pyrethrin and 4 parts by weight of pyrethrin are dissolved in methanol to obtain pyrethrin treatment solution and pyrethrin treatment solution, and the amount of organic solvent used is just enough to dissolve the pyrethrin;

[0050] Then, the silicon nanosheets were divided into two parts according to a weight ratio of 6:4, and were placed in a pyrethrin treatment solution and a pyridabenzyl treatment solution respectively, and then heated and ultrasonically treated at an ultrasonic power of 200 W. The organic solvent was removed by heating and drying, and then the silicon nanosheets were rinsed with cold water and dried with hot air to obtain a pyrethrin precursor and a pyridabenzyl precursor.

[0051] 5 parts of ammonium chloride are placed in water, enough to submerge the pyrethrin precursor and the pyridaben precursor, to form a dissolving solution, and the pyrethrin precursor and the pyridaben precursor are respectively placed in the dissolving solution with corresponding weight ratios for immersion, and the solution is slowly removed by heating to obtain a composite intercalation main agent.

[0052] Preparation Example 4 - No nanosheet material is used to wrap the active agent

[0053] Preparation of composite intercalation agent

[0054] Then, 3 parts by weight of pyrethrin and 3 parts by weight of pyrethrin are dissolved in ethanol to obtain pyrethrin treatment solution and pyrethrin treatment solution, and the amount of organic solvent used is just enough to dissolve the pyrethrin;

[0055] Then, the pyrethrin treatment solution and the pyridabenzyl treatment solution are heated and then ultrasonically treated at an ultrasonic power of 200 W, and then the organic solvent is removed by heating and drying to obtain a pyrethrin precursor and a pyridabenzyl precursor;

[0056] Place 5 parts of ammonium chloride or naphthalene in water, ethanol, methanol or petroleum ether to submerge the pyrethrin precursor and the pyridaben precursor to form a dissolving solution, then place the pyrethrin precursor and the pyridaben precursor in the dissolving solution with corresponding weight ratios for immersion, and slowly remove the solution by heating to obtain a composite intercalation main agent.

[0057] Preparation Example 5 - Precursor is not coated with smoke-generating aid

[0058] Preparation of composite intercalation agent

[0059] 12 portions of graphene are prepared into nanographene with a thickness of 10-30 nm and a number of 10-100 layers by ball milling;

[0060] Then, 4 parts by weight of pyrethrin and 2 parts by weight of pyrethrin are dissolved in ethanol to obtain pyrethrin treatment solution and pyrethrin treatment solution, and the amount of organic solvent used is just enough to dissolve the pyrethrin;

[0061] The nanographene was then divided into two parts according to a weight ratio of 4:2, and placed in a pyrethrin treatment solution and a cypermethrin treatment solution respectively, and then ultrasonically treated with an ultrasonic power of 200 W. The organic solvent was removed by heating and drying, and then the nanographene was rinsed with cold water and dried with hot air to obtain a composite intercalation main agent.

[0062] Preparation Example 6 - No organic solvent was used to dissolve the active agent

[0063] Preparation of composite intercalation agent

[0064] 13 parts of graphene are prepared into nanographene with a thickness of 10-30 nm and a number of 10-100 layers by ball milling;

[0065] 3 parts by weight of pyrethrin and 3 parts by weight of pyridabenz were mixed with nano-graphene in a weight ratio of 1:1 to obtain a pyrethrin precursor and a pyridabenz precursor;

[0066] Place 5 parts of ammonium chloride or naphthalene in water, ethanol, methanol or petroleum ether to submerge the pyrethrin precursor and the pyridaben precursor to form a dissolving solution, then place the pyrethrin precursor and the pyridaben precursor in the dissolving solution with corresponding weight ratios for immersion, and slowly remove the solution by heating to obtain a composite intercalation main agent.

[0067] Example 1

[0068] Preparation of a highly effective insecticide smoke composition

[0069] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0070] S2, the pyrethrin composite intercalation main agent in Preparation Example 1 is mixed with 5 parts of stearate and 7 parts by weight of a strong oxygen supply agent to form a powder C, which is placed on the top of powder B;

[0071] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 3 parts of the corresponding stearate and 5 parts by weight of a strong oxygen supply agent, place them on the top of the powder C, and compact them to obtain a high-efficiency insecticide smoke composition.

[0072] Example 2

[0073] Preparation of a highly effective insecticide smoke composition

[0074] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0075] S2, the pyrethrin composite intercalation main agent in Preparation Example 2 is mixed with 3 parts of stearate and 6 parts by weight of a strong oxygen supply agent to form a powder C, and placed on the top of powder B;

[0076] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 2 parts of the corresponding stearate and 4 parts by weight of a strong oxygen supply agent, place them on the top of the powder C, and compact them to obtain a high-efficiency insecticide smoke composition.

[0077] Example 3

[0078] Preparation of a highly effective insecticide smoke composition

[0079] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0080] S2, the pyrethrin composite intercalation main agent in Preparation Example 3 is mixed with 5 parts of stearate and 8 parts by weight of a strong oxygen supply agent to form a powder C, which is placed on the top of powder B;

[0081] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 5 parts of the corresponding stearate and 7 parts by weight of a strong oxygen supply agent, place them on the top of the powder C, and compact them to obtain a high-efficiency insecticide smoke composition.

[0082] Comparative Example 1

[0083] Preparation of a highly effective insecticide smoke composition

[0084] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust are ground and fry until anhydrous, the sawdust and powder A are mixed to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0085] S2, the pyrethrin composite intercalation main agent in Preparation Example 4 is mixed with 5 parts of stearate and 7 parts by weight of a strong oxygen supply agent to form a powder C, which is placed on the top of powder B;

[0086] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 3 parts of the corresponding stearate and 5 parts by weight of a strong oxygen supply agent, place them on the top of the powder C, and compact them to obtain a high-efficiency insecticide smoke composition.

[0087] Comparative Example 2

[0088] Preparation of a highly effective insecticide smoke composition

[0089] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0090] S2, the pyrethrin composite intercalation main agent in Preparation Example 5 is mixed with 3 parts of stearate and 6 parts by weight of a strong oxygen supply agent to form a powder C, and placed on the top of powder B;

[0091] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 2 parts of the corresponding stearate and 4 parts by weight of a strong oxygen supply agent, place them on the top of the powder C, and compact them to obtain a high-efficiency insecticide smoke composition.

[0092] Comparative Example 3

[0093] Preparation of a highly effective insecticide smoke composition

[0094] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0095] S2, the pyrethrin composite intercalation main agent in Preparation Example 6 is mixed with 5 parts of stearate and 8 parts by weight of a strong oxygen supply agent to form a powder C, and placed on the top of powder B;

[0096] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 5 parts of the corresponding stearate and 7 parts by weight of a strong oxygen supply agent, place them on the top of the powder C, and compact them to obtain a high-efficiency insecticide smoke composition.

[0097] Comparative Example 4—Preparation without using the layering method

[0098] Preparation of a highly effective insecticide smoke composition

[0099] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl)nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, and sawdust, coal powder or wood starch are mixed with powder A to obtain powder B;

[0100] S2, the pyrethrin composite intercalation main agent in Preparation Example 1 is mixed with 5 parts of stearate and 7 parts by weight of a strong oxygen supply agent to form a powder C;

[0101] S3. The pyridabenzyl composite intercalation main agent in Preparation Example 4 is mixed with 3 parts of the corresponding stearate and 5 parts by weight of a strong oxygen supply agent to obtain powder D. Powders B, C and D are mixed evenly and compacted to obtain a high-efficiency insecticide smoke composition.

[0102] Comparative Example 5 - No stearate was used

[0103] Preparation of a highly effective insecticide smoke composition

[0104] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0105] S2, the pyrethrin composite intercalation main agent in Preparation Example 1 and 7 parts by weight of a strong oxygen supply agent are mixed into powder C, and placed on the top of powder B;

[0106] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 5 parts by weight of a strong oxygen supply agent and place them on the upper part of the powder C. After compacting, a high-efficiency insecticide smoke composition is obtained.

[0107] Comparative Example 6 - No strong oxidant was used

[0108] Preparation of a highly effective insecticide smoke composition

[0109] S1. 15 parts by weight of ammonium chloride or naphthalene and 2 parts by weight of 4-(trifluoromethyl) nicotinamide are mixed to form powder A, and then 25 parts by weight of sawdust, coal powder or wood starch are ground and fry until anhydrous, sawdust, coal powder or wood starch are mixed with powder A to obtain powder B, and powder B is placed at the bottom of a cylindrical barrel and compacted;

[0110] S2, mixing the pyrethrin composite intercalation main agent in Preparation Example 1 with 5 parts of stearate to form powder C, and placing it on the top of powder B;

[0111] S3. Mix the pyridabenzyl composite intercalation main agent in Preparation Example 1 with 3 parts of corresponding stearate and place on the upper part of powder C. After compacting, obtain a high-efficiency insecticide smoke composition.

[0112] Experiments and data

[0113] The high-efficiency insecticidal smoke composition prepared in the above examples and comparative examples was tested for insecticide lethality, insecticide residual rate after ventilation, smoke volume and smoke formation speed. The test method is as follows:

[0114] A test field with a greenhouse was selected, in which aphids, whiteflies, small clawed mites and leaf rollers were distributed. The insecticide lethality was obtained by calculating the percentage of the number of insects that died after the smoke was released to the total number.

[0115] A test field with a greenhouse was selected, and aphids, whiteflies, small-clawed mites and leaf rollers were distributed in it. After ventilation for 20 minutes, the dead insects were removed and the field was allowed to stand for a long time to calculate the percentage of the number of deaths to the total number of remaining insects.

[0116] The test results are shown in Table 1 below:

[0117] Table 1

[0118]

[0119]

[0120] By drawing a line graph of the two mortality rates in Table 1 above, Figure 1 shown.

[0121] analyze

[0122] It can be seen from the experimental data of Examples 1, 2 and 3 that the high-efficiency insecticidal smoke composition prepared in the examples of the present application has a high mortality rate in comprehensive insecticide control, can effectively kill various pests, and has a certain killing effect after ventilation. The stearic acid and strong oxidant used have a faster smoke formation speed and a larger smoke volume, and the killing effect is good.

[0123] From the data of Comparative Example 1 in Table 1, it can be seen that in the process of preparing the composite intercalated main agent, the comparative example 1 did not use the nanosheet material to wrap the active main agent, and its lethality was poor before and after ventilation. It can be seen that the nanosheet material has a greater influence on the activity of the active main agent, and the nanosheet material can effectively retain the biological activity of the active main agent, thereby improving the killing effect of the active main agent on pests.

[0124] From the data of Comparative Example 2 in Table 1, it can be seen that the mortality rate of Comparative Example 2 is also low before and after ventilation, and the amount of smoke is small. Comparative Example 2 does not use a smoke-generating aid to coat the precursor. It can be seen that using a smoke-generating aid to coat the precursor can improve the dispersion effect of the active main agent, thereby increasing the insecticide mortality rate.

[0125] It can be seen from the data of Comparative Example 3 in Table 1 that the mortality rate of Comparative Example 3 is also low. Similar to Comparative Example 1, Comparative Example 3 does not use an organic solvent to dissolve the active main agent and then combine it with the nanosheet material. Therefore, it can be seen that dissolving with an organic solution can effectively make the active main agent located between the sheet materials, thereby achieving the purpose of protecting the active main agent with the sheet material, thereby improving the insecticide mortality rate.

[0126] It can be seen from the experimental data of Comparative Example 4 in Table 1 that the mortality rate of Comparative Example 4 is the lowest before ventilation, and the mortality rate decreases significantly after ventilation. However, the direct contact between the pyrethrins and pyridamole in Comparative Example 4 and the fuel will reduce their efficacy, and the large amount of smoke-generating aids will have a great impact on the active main agent. Therefore, it is necessary to use a layering method to prevent direct contact between the smoke-generating aid and the fuel, thereby effectively improving the insecticide mortality rate.

[0127] From the experimental data of Comparative Example 5 in Table 1, it can be seen that the mortality rate of Comparative Example 5 is higher before ventilation, but the mortality rate is the worst after ventilation, and the smoke volume is lower and the speaking time is longer. Comparative Example 5 does not use stearate. It can be seen that the presence of stearate can be used as a carbon source to increase the smoke volume, and the adhesion effect of the active main agent is most significantly improved. It has greater resistance to factors such as ventilation and can kill pests for a long time.

[0128] It can be seen from Comparative Example 6 in Table 1 that Comparative Example 6 has a lower mortality rate, a lower smoke volume, and a longest burning time, so it has a greater impact on the active main agent. Comparative Example 6 does not use a strong oxidant, so during the combustion process, the stearate has no corresponding main agent to help it form smaller solid particles, so the composite intercalation main agent cannot be sprayed into the air, and cannot be dispersed more evenly, so the killing effect is poor.

[0129] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A highly effective insecticidal smoke composition, characterized in that: The composition is composed of 55-65 parts by weight of a heat supply agent and 20-30 parts by weight of a composite intercalation main agent, wherein the composite intercalation main agent is composed of a nanosheet material, an active main agent and a smoke-generating auxiliary agent, the heat supply agent comprises stearate, a strong oxygen supply agent, a fuel and a smoke-generating auxiliary agent, the active main agent is composed of 4-(trifluoromethyl) nicotinamide, pyrethrin and pyridaben, and the strong oxygen supply agent is one of potassium perchlorate, potassium dichromate and sodium dichloroisocyanurate; The preparation steps of the composite intercalation main agent are as follows: The sheet material is crushed into nanosheet material by mechanical method, and then the active main agent is dispersed in organic solution to form a treatment solution, and then the crushed nanosheet material is placed in the treatment solution for ultrasonic treatment and heating operation, and finally dried and washed to obtain a dry precursor, and then the precursor is immersed in a solution of a smoke-generating aid, the solvent is removed and dried to obtain a composite intercalation main agent.

2. A highly effective insecticidal smoke composition according to claim 1, characterized in that: The stearate is one of calcium stearate, zinc stearate or magnesium stearate, and the smoke-generating aid is ammonium chloride or naphthalene.

3. A highly effective insecticidal smoke composition according to claim 1, characterized in that: The component ratio of the stearate, the strong oxygen supply agent, the fuel and the smoke-generating aid is 1-2:2-3:5:3 by weight.

4. A highly effective insecticidal smoke composition according to claim 1, characterized in that: The component ratio of 4-(trifluoromethyl)nicotinamide, pyrethrin and pyridaben in the active main agent is 2:2-5:1-3 by weight.

5. A highly effective insecticidal smoke composition according to claim 1, characterized in that: In the step of preparing the composite intercalant, the nanosheet material is one of graphene, mica, silicon nanosheet or hexagonal boron nitride.

6. A highly effective insecticidal smoke composition according to claim 1, characterized in that: The weight ratio of the nanosheet material to the active main agent in the composite intercalation main agent is 10:3-7, and the smoke-generating auxiliary agent in the composite intercalation main agent accounts for 25% of the total smoke-generating auxiliary agent weight.

7. A highly effective insecticidal smoke composition according to claim 1, characterized in that: The organic solvent is one of ethanol, petroleum ether or methanol, and the solvent in the solution of the smoking aid is one of water, ethanol, methanol or petroleum ether.

8. A method for preparing a high-efficiency insecticidal smoke composition according to any one of claims 1 to 7, characterized in that: The specific preparation steps are as follows: S1. Mix 75% by weight of a smoke-generating aid and 4-(trifluoromethyl) nicotinamide to form powder A, grind the fuel and fry it until it is anhydrous, mix the fuel and powder A to obtain powder B, and place powder B at the bottom of a cylindrical barrel and compact it; S2, prepare pyrethrin into a composite intercalation main agent, and mix it with the corresponding stearate and a strong oxygen supply agent to form powder C, and place it on the top of powder B; S3, prepare the composite intercalation main agent of pyridabenzan, mix it with the corresponding stearate and strong oxygen supply agent, place it on the upper part of the powder C, and obtain a high-efficiency insecticide smoke composition after compaction.

9. The method for preparing a high-efficiency insecticidal smoke composition according to claim 8, characterized in that: The fuel is one of wood chips, coal powder or wood powder starch.

10. A high-efficiency insecticidal smoke composition according to any one of claims 1 to 7, characterized in that: The smoke agent composition is applied to indoor greenhouses and forest environments with high water content.

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