A new pesticide composite insecticidal smoke agent and a preparation method thereof

Abstract

This invention belongs to the field of pesticide fumigant processing technology, specifically relating to a novel compound insecticidal fumigant and its preparation method. The novel compound insecticidal fumigant comprises the following raw materials: insecticide, combustion accelerant, and oxidant, wherein the insecticide includes flonicamid. This invention uses low-toxicity and highly effective flonicamid as the main raw material, and through scientific formulation, the compound insecticidal fumigant is less prone to developing resistance, exhibiting excellent pest control effects. Furthermore, the compound insecticidal fumigant is highly safe, environmentally friendly, has no risk of spontaneous combustion, maintains a stable smoke production rate, and is convenient to apply. Simultaneously, the preparation process of this compound insecticidal fumigant is simple and low-cost, adaptable to different formulations, and suitable for pest control in greenhouses and other protected cultivation areas. It solves the problems of existing fumigant components being outdated, highly toxic, and having limited control effects, and has broad application prospects.

Description

Technical Field

[0001] This invention belongs to the field of pesticide fumigant processing technology, specifically relating to a novel pesticide compound insecticide fumigant and its preparation method. Background Technology

[0002] As a highly efficient and convenient pesticide application agent, pesticide fumigants have been used in my country since the 1960s due to their outstanding advantages of being easy and quick to use, saving labor and time, and not increasing greenhouse humidity. Especially in the cultivation of protected crops such as greenhouses and polytunnels, their characteristics of not requiring complicated application equipment, being able to diffuse evenly in enclosed spaces, and being able to effectively cover all parts of the crop have led to their widespread adoption, significantly improving the efficiency of pest control in protected crops and reducing the labor intensity of farmers in pesticide application.

[0003] However, the early pesticide fumigants have gradually become outdated and have the following drawbacks: the products are prone to spontaneous combustion, such as dichlorvos fumigants, posing serious safety hazards during storage and transportation; they are highly toxic, posing a significant threat not only to the health of pesticide applicators but also to the ecological environment, including soil, water, and air; and they have high pesticide residue levels, which do not meet the requirements of modern pollution-free agricultural production. Therefore, these early fumigants have been largely phased out of agricultural production.

[0004] Currently, the mainstream pesticide smoke agents on the market mainly include dichlorvos (DDVP), isoprocarb, and pyridaben. These products meet the pest control needs of protected crops to a certain extent, but they still have the following shortcomings: On the one hand, the active ingredients of these existing smoke agents are mostly traditional insecticides, and long-term use can easily lead to pesticide resistance in pests, resulting in a year-by-year decline in control efficacy; on the other hand, some products still have problems such as high toxicity, poor application safety, and unstable smoke generation rate, making it difficult to adapt to the production requirements of pollution-free agricultural products and failing to meet the development needs of modern agriculture for green, safe, and efficient production.

[0005] Flupyradifurone, a novel low-toxicity pyridine amide insecticide, was discovered by Ishihara Sangyo Co., Ltd. of Japan. It has a unique mechanism of action and is highly effective against piercing-sucking pests such as aphids, whiteflies, and thrips. It is low in toxicity, environmentally friendly, and safe for natural enemies such as bees. It has advantages such as strong systemic conductivity, long-lasting effect, and no cross-resistance. It has been widely used on various crops. However, there are currently no reports on the technology of processing it into a smoke agent, which cannot meet the urgent need of protected crops for efficient, safe, and convenient smoke agents.

[0006] In summary, current pesticide fumigants on the market suffer from problems such as outdated ingredients, high toxicity, limited control effects, and insufficient compatibility. With the popularization of the concept of pollution-free agricultural production and the expansion of protected cultivation, developing a new, efficient, low-toxicity, safe pesticide fumigant with excellent fumigation performance has become an urgent technical problem to be solved in current agricultural production. Summary of the Invention

[0007] Based on the above technical background, this invention addresses the shortcomings of existing pesticide smoke agents, such as aging components, high toxicity, easy development of pesticide resistance by pests, unstable smoke formation performance, and limited control effect. It provides a novel pesticide compound insecticidal smoke agent and its preparation method to overcome the deficiencies of the prior art.

[0008] To achieve the aforementioned objectives, the technical solution adopted by this invention includes:

[0009] The first aspect of this invention is to provide a novel pesticide compound insecticide smoke agent, which comprises the following raw materials in parts by weight: Insecticide 1-45 parts by weight, combustion improver 15-25 parts by weight, oxidant 15-40 parts by weight, smoke generator 10-20 parts by weight; cooling agent 10-30 parts by weight.

[0010] The insecticide includes flonicamid.

[0011] Flupyradifurone is a white crystalline powder, odorless, with a melting point of 157.5℃. Its vapor pressure is 2.55 × 10⁻⁶. -3 mPa (20℃), KowlogP (octanol-water partition coefficient) = 0.3. Henry's constant (Henry constant, an important parameter characterizing the solubility of a gas in a liquid) 4.2 × 10⁻⁶ mPa (20℃), KowlogP (octanol-water partition coefficient) = 0.3. -8 Pa·m 3 / mol, relative density 1.531 (20℃), solubility in water 5.2 g / L (20℃). ChemicalbookpKa 11.6. Solubility (20℃, g / L): water 5.2, n-hexane 0.0002, n-octanol 3.0, methanol 110.6, toluene 0.55, isopropanol 15.7, dichloromethane 4.5, acetone 186.7, toluene 0.55, ethyl acetate 33.9, acetonitrile 146.1. Stable to light and heat, not easily hydrolyzed.

[0012] Flupyradifurone is characterized by low toxicity, no residue, and safety to natural enemies. One of its core functions is to replace the aging and highly toxic insecticidal components in existing fumigants, reducing the overall toxicity of fumigant products at the source, while also reducing pollution to the health of pesticide applicators and the ecological environment, including soil, water, and air. Although flupyradifurone has these advantages, when directly processed into pesticide fumigant formulations, it suffers from poor thermal stability, lack of compatibility with combustion and smoke generation, difficulty in smoke release, significant safety hazards, and complex formulation requirements. This invention improves its combustion and smoke generation properties and enhances its thermal stability by incorporating specific combustion improvers and oxidizers, thus solving the problem of easy inactivation at high temperatures.

[0013] Preferably, the novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: Insecticide 10-40 parts by weight, combustion improver 18-22 parts by weight, oxidizer 20-30 parts by weight.

[0014] The insecticides also include one or more of the following: pyrethroid insecticides, carbamate insecticides, fungicides, organophosphate insecticides, neonicotinoid insecticides, and pyridazinone insecticides.

[0015] This invention combines flonicamid with the aforementioned insecticides, retaining the advantages of flonicamid's low toxicity, long-lasting effect, and environmental friendliness, while also leveraging the characteristics of other insecticides to compensate for the shortcomings of single components. By combining other insecticides, a broad-spectrum insecticidal control target can be achieved, solving the technical problems of existing smoke agents having a narrow control spectrum, easy development of resistance, and limited control effect, and adapting to the diverse pest control needs of protected crops.

[0016] Preferably, the pyrethroid insecticide includes high-efficiency cypermethrin and bifenthrin.

[0017] Preferably, the carbamate insecticide includes isoprocarb, methomyl, and thiamethoxam.

[0018] Preferably, the fungicides and insecticides include chlorothalonil, iprodione, sclerotinia sclerotinia, metalaxyl, ethirimol, and acetamiprid.

[0019] Preferably, the organophosphate insecticide includes DDVP and trichlorfon.

[0020] Preferably, the neonicotinoid insecticides include imidacloprid, acetamiprid, and dinotefuran.

[0021] Preferably, the pyridazinone insecticide includes pyridazin.

[0022] More preferably, the insecticide also includes lambda-cyhalothrin.

[0023] High-efficiency cypermethrin belongs to the pyrethroid class and is a broad-spectrum, highly effective, and low-toxicity insecticide. It is a highly efficient cis isomer of cypermethrin, exhibiting high insecticidal activity and rapid knockdown speed.

[0024] Preferably, the combustion aid is selected from one or more of wood flour, corn cob, bagasse, starch, hexamethylenetetramine, and sulfur.

[0025] More preferably, the combustion aid is wood flour.

[0026] The combustion accelerant used in this invention possesses excellent flammability, rapidly igniting the smoke agent system upon open flame ignition. This provides initial heat for smoke agent combustion, ensuring smooth and sustained ignition and solving the problems of difficult ignition and unstable combustion. Simultaneously, the combustion accelerant, through its own combustion characteristics, works synergistically with the oxidizer to regulate the combustion rate of the smoke agent. This prevents excessively rapid combustion from causing high-temperature decomposition and efficacy loss of active ingredients such as flonicamid, and also prevents insufficient smoke production and uneven smoke diffusion due to excessively slow combustion. By limiting the amounts of combustion accelerant and oxidizer within the aforementioned ranges, this invention ensures a stable combustion rate and, in conjunction with a cooling smoke generator, stabilizes the combustion temperature within a safe and reasonable range.

[0027] Preferably, the oxidant is selected from one or more of potassium chlorate, ammonium nitrate, potassium nitrate, potassium perchlorate, and potassium permanganate.

[0028] More preferably, the oxidant is selected from one or more of potassium chlorate, ammonium nitrate, and potassium nitrate.

[0029] For example, the oxidant is potassium chlorate, or the oxidant is a mixture of ammonium nitrate and potassium nitrate.

[0030] Sufficient oxygen is required for the combustion of smoke agents, especially when applying them in enclosed spaces such as greenhouses or sheds where poor air circulation can easily lead to incomplete combustion or extinguishing. The oxidant added to the smoke agent undergoes a decomposition reaction during combustion, releasing a large amount of oxygen. This provides a sufficient oxygen supply for the combustion of the accelerant (such as wood powder), ensuring that the smoke agent can ignite quickly and burn continuously and stably after ignition. This avoids difficulties in ignition or interruption of combustion and provides a stable heat source for the volatilization of the active ingredients into smoke.

[0031] Preferably, the novel pesticide compound insecticidal smoke agent further includes 5 to 15 parts by weight of a cooling smoke-generating agent.

[0032] More preferably, the novel pesticide compound insecticidal smoke agent further includes 10 parts by weight of a cooling smoke-generating agent.

[0033] Preferably, the cooling and fumigating agent is selected from one or more of ammonium chloride, ammonium sulfate, ammonium bicarbonate, boric acid, and magnesium sulfate.

[0034] More preferably, the cooling and fume-generating agent is ammonium chloride.

[0035] This compound insecticide smoke agent releases a large amount of heat during combustion. If the temperature is too high, it will not only cause the active ingredients such as flonicamid to decompose at high temperatures and lose their efficacy, but may also cause the smoke agent to spontaneously combust, posing serious safety hazards for storage, transportation, and application. The cooling smoke agent used in this invention undergoes an endothermic decomposition reaction during combustion, quickly absorbing the excess heat generated by the smoke agent's combustion and stabilizing the combustion temperature within a safe and reasonable range (as shown in Table 1 of Experimental Example 1, it can ensure that the spontaneous combustion temperature of the smoke agent prepared by this invention is maintained at 132-138℃), effectively eliminating the risk of spontaneous combustion, and avoiding burns to the applicator due to high temperatures. It is especially suitable for application scenarios in enclosed spaces such as greenhouses and sheds, further improving the safety of the smoke agent. In addition, the cooling smoke agent used in this invention, especially ammonium chloride, can promote smoke formation and improve the smoke generation rate and smoke uniformity.

[0036] Preferably, the novel pesticide compound insecticidal smoke agent further includes 2 to 4 parts by weight of binder powder.

[0037] More preferably, the novel pesticide compound insecticidal smoke agent further includes 3 parts by weight of binder.

[0038] Preferably, the adhesive is selected from one or more of CMC (sodium carboxymethyl cellulose), hydroxyethyl cellulose, polyvinyl alcohol, corn starch, and polyethylene glycol.

[0039] More preferably, the adhesive is CMC.

[0040] The novel pesticide compound insecticidal smoke agent of this invention can be prepared in various formulations such as powder, tablet, granule, or rod. The molding of tablet, granule, and rod formulations depends on the bonding effect of the binder, especially CMC binder. CMC has good hydrophilicity and bonding strength. During the smoke agent preparation process, its molecules can fully combine with various raw material powders such as flonicamid, combustion aid, oxidant, cooling smoke generator, and inert filler regulator, tightly bonding the dispersed powder particles together to form a molded compound insecticidal smoke agent with uniform structure and moderate strength.

[0041] Preferably, the novel pesticide compound insecticidal smoke agent further includes 30-35 parts by weight of an inert filler regulator.

[0042] More preferably, the novel pesticide compound insecticidal smoke agent further includes 34 parts by weight of an inert filler regulator.

[0043] Preferably, the inert filler is selected from one or more of talc, silica, perlite, bentonite, kaolin, quartz, diatomite, and attapulgite.

[0044] More preferably, the inert filler is talc.

[0045] Inert filler regulators, which do not participate in the combustion reaction of smoke agents and have no insecticidal activity, are used in this invention. The inert filler regulators (especially talc) have a fine texture and good dispersibility, allowing them to be uniformly filled between the particles of various raw materials. This effectively regulates the density of the smoke agent material, preventing problems such as voids and delamination after molding due to uneven material density. For rod-shaped and granular smoke agents, the inert filler regulator can work synergistically with CMC binders to enhance the structural strength of the molded smoke agent, further preventing breakage and collapse during storage and transportation. For powdered smoke agents, the inert filler regulator can improve the flowability of the powder, reduce clumping, facilitate mixing, metering, and application, and also help reduce dust generation and improve operational convenience.

[0046] Preferably, the novel pesticide compound insecticidal smoke agent further includes 10-15 parts by weight of a smoke-generating agent, wherein the smoke-generating agent is preferably magnesium carbonate.

[0047] The smoke-generating agent added in this invention can increase the specific surface area of ​​the smoke agent, making the smoke after combustion more uniform, thick and white, with strong adhesion, and can increase the bactericidal and insecticidal effects.

[0048] The novel pesticide compound insecticidal smoke agent is available in powder, tablet, granule, or rod form.

[0049] According to a preferred embodiment of the present invention, the novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The compound insecticide fumigant contains 10 parts by weight of flupyradifuramide, 18 parts by weight of wood flour, 20 parts by weight of potassium chlorate, 15 parts by weight of ammonium chloride, 3 parts by weight of CMC binder, 10 parts by weight of magnesium carbonate, and 24 parts by weight of talc. This novel pesticide compound insecticide fumigant is in rod form.

[0050] According to a preferred embodiment of the present invention, the novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The compound insecticide fumigant contains 20 parts by weight of flupyradifurone, 10 parts by weight of lambda-cyhalothrin, 20 parts by weight of wood flour, 20 parts by weight of ammonium nitrate, 10 parts by weight of potassium nitrate, 10 parts by weight of magnesium carbonate, and 10 parts by weight of ammonium chloride. This novel pesticide compound insecticide fumigant is in powder form.

[0051] According to a preferred embodiment of the present invention, the novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The compound insecticide fumigant contains 10 parts by weight of flupyradifurone, 10 parts by weight of bifenthrin, 20 parts by weight of wood flour, 15 parts by weight of ammonium nitrate, 15 parts by weight of potassium nitrate, and 30 parts by weight of ammonium chloride. This novel pesticide compound insecticide fumigant is in powder form.

[0052] A second aspect of the present invention is to provide a method for preparing the above-mentioned novel pesticide smoke insecticide, the method comprising the following steps: The insecticide, combustion aid, and oxidant are pulverized, and the resulting powders of insecticide, combustion aid, and oxidant are mixed evenly to obtain a new type of pesticide smoke insecticide.

[0053] Preferably, the insecticide, combustion aid, and oxidizer are pulverized to 40-100 mesh.

[0054] More preferably, the insecticide, combustion improver, and oxidizer are pulverized to 50-70 mesh.

[0055] The beneficial effects of this invention are as follows: (1) This invention uses flonicamid, a low-toxicity pyridine amide insecticide, as its core active ingredient. It has a high-efficiency control effect on piercing-sucking pests such as aphids, whiteflies, and thrips. Fluonicamid itself is low in toxicity, leaves no residue, and is safe for natural enemies. Combined with the low-toxicity compound ingredients screened in this invention and auxiliary materials such as combustion aids and oxidants, the toxicity of the compound insecticide smoke product can be greatly reduced. This reduces the threat to the health of the pesticide applicator and avoids pollution to the soil, water, air and other ecological environments. At the same time, this compound insecticide smoke is not prone to developing resistance. No toxic or harmful byproducts are produced during combustion. The combustion temperature can be kept stable within a safe range. The smoke performance is stable and there is no risk of spontaneous combustion. The safety of storage, transportation and greenhouse application is significantly improved, which meets the requirements of pollution-free production in modern agriculture.

[0056] (2) The compound insecticidal smoke agent of the present invention can be combined with various insecticides such as pyrethroids, carbamates, and organophosphates according to actual control needs, thereby achieving synergistic effects of components with different mechanisms of action. This not only broadens the control spectrum but also effectively delays the development of insecticide resistance in pests, solving the problem of declining control effect of existing smoke agents after long-term use. In actual application, the insecticidal smoke agent of the present invention can achieve an insecticidal rate of 85% to 95%, which is significantly better than existing smoke insecticides such as isoprocarb and dichlorvos.

[0057] (3) The compound insecticide smoke agent of the present invention optimizes the combustion characteristics of the smoke agent system by scientifically proportioning combustion aid, oxidant, cooling smoke agent and inert filler regulator, so that the smoke production rate of the product is stable at more than 85%. After ignition, it can quickly form uniform smoke, which can spread evenly in closed spaces such as greenhouses and sheds, effectively covering all parts of crops. It is especially suitable for pesticide application in protected crops. No complicated pesticide application equipment is required. The application method is convenient and efficient, which can greatly reduce the labor intensity of farmers in pesticide application and solve the problems of unstable smoke production rate and uneven application of existing smoke agents.

[0058] (4) By precisely controlling the weight proportions of each raw material and screening out compatible auxiliary components, such as combustion aids and oxidants, the present invention enables the compound insecticidal smoke agent to have excellent performance in terms of good thermal storage stability, non-caking and non-inactivation at room temperature, stable combustion rate and controllable combustion time, effectively avoiding the problem of decomposition of the original drug due to excessively fast combustion or the impact of excessively slow combustion on the smoke effect; at the same time, the compound insecticidal smoke agent can flexibly adjust the proportion of each component to adapt to the production needs of different formulations, and has strong applicability.

[0059] (5) The preparation method of the present invention only requires crushing each raw material to a specified mesh size and then mixing them evenly. It does not require complex equipment and complicated procedures. It is easy to operate and has low energy consumption. At the same time, no pollutants are generated in the process, which is in line with the concept of green production and can realize large-scale industrial production.

[0060] This invention provides a compound insecticidal smoke agent suitable for various greenhouse and protected cultivation crops. It can effectively control common pests such as aphids, whiteflies, and thrips on crops such as cucumbers and tomatoes, and has the advantages of high efficiency, low toxicity, safety, and convenience. Detailed Implementation

[0061] The present invention will now be described in detail, and its features and advantages will become clearer and more apparent from these descriptions.

[0062] Example The present invention is further illustrated below with specific examples. These embodiments are merely illustrative and not intended to limit the scope of the invention. All raw materials used in the embodiments of the present invention are commercially available.

[0063] A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: 1-45 parts by weight of flupyradifuramide, 15-25 parts by weight of wood flour, 15-20 parts by weight of potassium chlorate, 5-30 parts by weight of ammonium chloride, 2-4 parts by weight of CMC binder powder, 30-35 parts by weight of talc powder, and 10-15 parts by weight of magnesium carbonate.

[0064] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flonicamid, wood flour, potassium chlorate, ammonium chloride, CMC binder, talc, and magnesium carbonate. Crush each of the weighed ingredients to 50-70 mesh. Then mix the ingredients evenly to obtain the novel pesticide compound insecticidal smoke agent.

[0065] Example 1 A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The novel pesticide compound insecticide smoke agent comprises 10 parts by weight of flupyradifurone, 18 parts by weight of wood flour, 20 parts by weight of potassium chlorate, 15 parts by weight of ammonium chloride, 3 parts by weight of CMC binder, 24 parts by weight of talc, and 10 parts by weight of magnesium carbonate. It is in rod form.

[0066] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flonicamid, wood flour, potassium chlorate, ammonium chloride, CMC binder, magnesium carbonate, and talc. Crush each of the weighed ingredients to 50-70 mesh. Then mix the ingredients evenly to obtain the novel pesticide compound insecticidal smoke agent.

[0067] Example 2 A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The novel pesticide compound insecticide fumigant contains 10 parts by weight of flupyradifurone, 17 parts by weight of starch, 25 parts by weight of ammonium nitrate, 15 parts by weight of ammonium chloride, 4 parts by weight of CMC binder, 10 parts by weight of magnesium carbonate, and 19 parts by weight of talc. It is in tablet form.

[0068] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flonicamid, starch powder, ammonium nitrate, ammonium chloride, CMC binder, talc powder, and magnesium carbonate. Crush each of the weighed raw materials to 50-70 mesh. Then mix the raw materials evenly to obtain a novel pesticide compound insecticidal smoke agent.

[0069] Example 3 A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The compound insecticide fumigant contains 10 parts by weight of flupyradifurone, 20 parts by weight of wood flour, 30 parts by weight of potassium chlorate, 10 parts by weight of ammonium chloride, 10 parts by weight of magnesium carbonate, and 20 parts by weight of bentonite. This novel compound insecticide fumigant is in rod form.

[0070] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flonicamid, wood flour, potassium chlorate, ammonium chloride, magnesium carbonate, and bentonite. Crush each of the weighed raw materials to 50-70 mesh. Then mix the raw materials evenly to obtain a novel compound insecticidal smoke agent.

[0071] Example 4 A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The compound insecticide fumigant contains 20 parts by weight of flupyradifurone, 10 parts by weight of bifenthrin, 20 parts by weight of wood flour, 20 parts by weight of ammonium nitrate, 10 parts by weight of potassium nitrate, 10 parts by weight of magnesium carbonate, and 10 parts by weight of ammonium chloride. This novel pesticide compound insecticide fumigant is in powder form.

[0072] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flupyradifurone, bifenthrin, wood flour, ammonium nitrate, potassium nitrate, ammonium chloride, and magnesium carbonate. Crush each of the weighed ingredients to 70-100 mesh. Then mix the ingredients evenly to obtain a novel compound insecticidal smoke agent.

[0073] Example 5 A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: The compound insecticide fumigant contains 10 parts by weight of flupyradifurone, 10 parts by weight of bifenthrin, 20 parts by weight of wood flour, 15 parts by weight of ammonium nitrate, 15 parts by weight of potassium nitrate, 20 parts by weight of ammonium chloride, and 10 parts by weight of magnesium carbonate. This novel pesticide compound insecticide fumigant is in powder form.

[0074] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flupyradifurone, bifenthrin, wood flour, ammonium nitrate, potassium nitrate, ammonium chloride, and magnesium carbonate. Crush each of the weighed ingredients to 70-100 mesh. Then mix the ingredients evenly to obtain a novel compound insecticidal smoke agent.

[0075] Example 6 A novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: 20 parts by weight of flupyradifurone, 10 parts by weight of pyramidal powder, 25 parts by weight of wood flour, 10 parts by weight of ammonium nitrate, 10 parts by weight of potassium nitrate, 15 parts by weight of ammonium chloride, and 10 parts by weight of magnesium carbonate.

[0076] A method for preparing the above-mentioned novel pesticide compound insecticidal smoke agent includes the following steps: Weigh out the following ingredients according to the above weight proportions: flonicamid, pyram, wood flour, ammonium nitrate, potassium nitrate, magnesium carbonate, ammonium chloride, and magnesium carbonate. Crush each of the weighed raw materials to 70-100 mesh. Then mix the raw materials evenly to obtain a novel compound insecticidal smoke agent.

[0077] Comparative Example Comparative Example 1 The compound insecticide smoke agent was prepared in a manner similar to that in Example 1, except that flonicamid was replaced with isoprocarb smoke agent.

[0078] Comparative Example 2 The compound insecticidal smoke agent was prepared in a manner similar to that in Example 3, except that flonicamid was replaced with DDVP.

[0079] Comparative Example 3 The compound insecticidal smoke agent was prepared in a manner similar to that in Example 1, except that the amount of ammonium chloride added was 28 parts by weight.

[0080] Comparative Example 4 The compound insecticidal fumigant was prepared in a manner similar to that in Example 1, except that the amount of potassium chlorate added was 12 parts by weight.

[0081] Comparative Example 5 The compound insecticidal smoke agent was prepared in a manner similar to that in Example 1, except that the amount of potassium chlorate added was 43 parts by weight.

[0082] Experimental Example Experimental Example 1: Smoke Formation Rate and Thermal Storage Stability Test The smoke compound insecticidal smoke agents prepared in Examples 1 to 3 were tested for smoke generation rate, thermal storage stability, burning time, and pH. The test results are shown in Table 1.

[0083] Table 1

[0084] As shown in Table 1, the composite insecticidal smoke agents prepared in Examples 1-3 achieved a smoke generation rate of over 85%, a burning time of over 4.3 minutes, and high thermal storage stability. These results indicate that the composite insecticidal smoke agent of this invention has a high smoke generation rate, a long burning time, and a stable burning temperature within a safe range.

[0085] Experiment Example 2: Prevention and Control Effect Test The control effects of the compound insecticide smoke agents prepared in Examples 1-2 and Comparative Examples 1-5 were tested. The fields planted with cucumber crops were divided into 7 equal plots. The compound insecticide smoke agents were applied to the plots at a dosage of 1000 g / mu. The number of aphids, whiteflies and thrips before and after application was counted. The results are shown in Table 2.

[0086] Control effect = (Number of each pest per acre before application of compound insecticide smoke agent - Number of each pest per acre after application of compound insecticide smoke agent) / Number of each pest per acre before application of compound insecticide smoke agent × 100%.

[0087] Table 2. Control efficacy of compound insecticide smoke agents

[0088] As shown in Table 2, the smoke agent compound insecticide prepared in Example 1 achieved a control efficacy of 95-96% against aphids, 90-95% against whiteflies, and 85-87% against thrips. The smoke agent compound insecticide prepared in Example 2 achieved a control efficacy of 96-97% against aphids, 92-96% against whiteflies, and 87-89% against thrips. The smoke agent compound insecticides prepared in Examples 1 and 2 showed significantly higher control efficacy against aphids, whiteflies, and thrips than the isoprocarb smoke agent in Comparative Example 1, the DDVP smoke agent in Comparative Example 2, and Comparative Examples 3-5. These results indicate that the compound insecticide smoke agent prepared using flonicamid as the main insecticidal component, combined with other insecticides, oxidants, and combustion improvers, exhibits excellent control efficacy against aphids, whiteflies, and thrips.

[0089] Compared with Example 1, Comparative Example 3 increased the amount of ammonium chloride added to 28 parts by weight. Experimental results showed that the control effect of the compound insecticidal smoke agent prepared in Comparative Example 3 on aphids, whiteflies, and thrips was significantly lower than that in Example 1. These results indicate that the amount of ammonium chloride added plays a crucial role in the control effect of the final compound insecticidal smoke agent. Only when the amount of ammonium chloride added is within a certain range can the prepared compound insecticidal smoke agent have a good control effect on aphids, whiteflies, and thrips.

[0090] Compared with Example 1, Comparative Example 4 reduced the amount of potassium chlorate added. Experimental results showed that the control efficacy of the compound insecticidal smoke agent prepared in Comparative Example 4 against aphids, whiteflies, and thrips was significantly lower than that in Example 1. These results indicate that the amount of potassium chlorate added plays a crucial role in the control efficacy of the final compound insecticidal smoke agent.

[0091] Compared with Example 1, Comparative Example 5 increased the amount of potassium chlorate added. Experimental results showed that the control efficacy of the compound insecticidal smoke agent prepared in Comparative Example 5 against aphids, whiteflies, and thrips was significantly lower than that in Example 1. These results indicate that the amount of potassium chlorate added plays a crucial role in the control efficacy of the final compound insecticidal smoke agent; only when the amount of potassium chlorate added is within a certain range can the prepared compound insecticidal smoke agent exhibit superior control efficacy.

[0092] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A novel pesticide compound insecticidal smoke agent, characterized in that, The novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: Insecticide 1-45 parts by weight, combustion improver 15-25 parts by weight, oxidizer 15-40 parts by weight; The insecticide includes flonicamid.

2. The novel pesticide compound insecticidal smoke agent according to claim 1, characterized in that, The novel pesticide compound insecticidal smoke agent comprises the following raw materials in parts by weight: Insecticide 10-40 parts by weight, combustion improver 18-22 parts by weight, oxidizer 20-30 parts by weight.

3. The novel pesticide compound insecticidal smoke agent according to claim 1, characterized in that, The insecticide further includes one or more of the following: pyrethroid insecticides, carbamate insecticides, fungicides, organophosphate insecticides, neonicotinoid insecticides, and pyridazinone insecticides; and / or, The combustion aid is selected from one or more of wood flour, corn cob, sugarcane bagasse, starch, hexamethylenetetramine, and sulfur; and / or, The oxidant is selected from one or more of potassium chlorate, ammonium nitrate, potassium nitrate, potassium perchlorate, and potassium permanganate.

4. The novel pesticide compound insecticidal smoke agent according to claim 1, characterized in that, The novel pesticide compound insecticidal smoke agent also includes 5 to 15 parts by weight of a cooling smoke-generating agent.

5. The novel pesticide compound insecticidal smoke agent according to claim 4, characterized in that, The cooling and fume-generating agent is selected from one or more of ammonium chloride, ammonium sulfate, ammonium bicarbonate, boric acid, and magnesium sulfate.

6. The novel pesticide compound insecticidal smoke agent according to claim 1, characterized in that, The novel pesticide compound insecticidal smoke agent also includes 2 to 4 weights of binder powder.

7. The novel pesticide compound insecticidal smoke agent according to claim 6, characterized in that, The adhesive is selected from one or more of CMC, hydroxyethyl cellulose, polyvinyl alcohol, corn starch, and polyethylene glycol.

8. The novel pesticide compound insecticidal smoke agent according to claim 1, characterized in that, The novel pesticide compound insecticidal smoke agent also includes 30-35 parts by weight of inert filler regulator.

9. The novel pesticide compound insecticidal smoke agent according to claim 8, characterized in that, The inert filler regulator is selected from one or more of the following: talc, silica, perlite, bentonite, kaolin, quartz powder, diatomite, and attapulgite.

10. A method for preparing a novel pesticide compound insecticidal smoke agent according to any one of claims 1 to 9, characterized in that, The preparation method includes the following steps: The insecticide, combustion aid, and oxidant are pulverized, and the resulting powders of insecticide, combustion aid, and oxidant are mixed evenly to obtain a new type of pesticide smoke insecticide.

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