Insecticide taking mesoporous silica as carrier and preparation method thereof

Abstract

The invention relates to the field of insecticide preparation, and particularly discloses an insecticide taking mesoporous silica as a carrier and a preparation method of the insecticide. The abamectin sustained-release tablet comprises the following raw materials in parts by weight: 1-1.5% of mesoporous silica-loaded abamectin, 2.6-3.2% of fiber-loaded bacillus thuringiensis, 2-5% of a dispersing agent, 2-5% of a wetting agent, 1-2% of a binder and the balance of filler, wherein the total percentage is 100%. The preparation method comprises the following steps: S1, weighing the mesoporous silica carrier abamectin, the fiber carrier bacillus thuringiensis and the filler, and uniformly mixing and stirring to obtain a primary mixture; s2, adding a dispersing agent, a wetting agent and a binder into the primary mixture, and uniformly mixing and stirring to obtain an insecticide; the pesticide has the advantage of efficiently killing the pine caterpillars on the masson pine.

Description

Technical Field

[0001] This application relates to the field of insecticide preparation, and more specifically, to an insecticide using mesoporous silica as a carrier and a method for its preparation. Background Technology

[0002] Insecticides are pesticides that kill pests and can control agricultural pests, thereby ensuring plant growth.

[0003] Avermectin-Bacillus thuringiensis is a biological compound insecticide composed of avermectin and Bacillus thuringiensis. Avermectin has strong penetrability and primarily works through contact and stomach poison to quickly knock down pests, paralyzing, immobilizing, and preventing them from feeding, ultimately leading to death. Bacillus thuringiensis kills pests through stomach poison; after ingestion, the bacteria enter the insect's digestive tract, damaging midgut cells and causing septicemia and death. Avermectin-Bacillus thuringiensis is widely used to control various pests, including beet armyworm, cotton bollworm, rice stem borer, leaf roller, bean pod borer, aphids, planthoppers, mirid bugs, and leaf miners. Masson pine is a common evergreen tree belonging to the genus Pinus in the family Pinaceae. Its wood is relatively hard and can be used for building materials. It also has some medicinal value; its pollen, needles, and root bark can be used to treat rheumatism, weakness, and injuries. However, Masson pine trees are prone to infestations by pine caterpillars, which can rapidly consume the leaves, leading to tree decline and impacting both the tree's growth and its usability. Therefore, how to prepare an effective insecticide to kill pine caterpillars on Masson pine is an urgent problem to be solved. Summary of the Invention

[0004] To effectively kill pine caterpillars, this application provides an insecticide using mesoporous silica as a carrier and a method for its preparation.

[0005] In a first aspect, this application provides an insecticide using mesoporous silica as a carrier, employing the following technical solution: An insecticide using mesoporous silica as a carrier comprises the following raw materials in parts by weight: 1-1.5% abamectin as a mesoporous silica carrier, 2.6-3.2% Bacillus thuringiensis as a fiber carrier, 2-5% dispersant, 2-5% wetting agent, 1-2% binder, and filler to make up to 100%.

[0006] By adopting the above technical solution, the mesoporous silica-loaded abamectin and the fiber-loaded Bacillus thuringiensis work together to utilize the slow-release effect and loading capacity of the mesoporous silica, minimizing the impact of external environmental temperature and humidity on the effective activity of abamectin and Bacillus thuringiensis, ensuring the contact killing effect on pine caterpillars, and prolonging the duration of the insecticide's action.

[0007] In combination with dispersants, wetting agents, binders and fillers, the dispersion and spraying uniformity of the insecticide are further improved during the spraying process, so that the insecticide adheres evenly to the surface of the Masson pine leaves, thereby further promoting the killing of pine caterpillars and achieving a highly efficient effect in killing pine caterpillars.

[0008] Preferably, the mesoporous silica carrier avermectin is prepared by loading avermectin onto mesoporous silica in a mass ratio of 2.2-2.6:1:0.4-0.8 and then binding it with a rosin pentaerythritol ester composite solution.

[0009] By adopting the above technical solution, the mesoporous structure of mesoporous silica facilitates the loading of abamectin. Then, a rosin pentaerythritol ester composite liquid is used for encapsulation and sealing, preventing rainwater from washing away the abamectin and ensuring the long-term effectiveness of the abamectin in the insecticide. Furthermore, the pore barrier of the mesoporous silica, combined with the shielding effect of the rosin pentaerythritol ester composite liquid film, prevents abamectin from being affected by light, ensuring the continuous killing effect of abamectin on pine caterpillars. Simultaneously, the hydrophobic film formed by the rosin pentaerythritol ester allows the insecticide to firmly adhere to the pine needle surface, increasing the probability of pine caterpillars feeding on it. When pine caterpillars feed, it triggers targeted drug release, improving the accuracy of insecticidal action. In addition, the strong lipophilicity of the rosin pentaerythritol ester can dissolve the waxy layer on the surface of the pine caterpillars, accelerating drug penetration into the insect body, thereby achieving a highly efficient killing effect on pine caterpillars.

[0010] Preferably, the rosin pentaerythritol ester composite solution is prepared from a rosin pentaerythritol ester solution and menthyl lactate in a mass ratio of 1:0.1-0.2.

[0011] By adopting the above technical solution, menthol lactate is dispersed in the rosin pentaerythritol ester composite solution. Menthol lactate interferes with the olfactory receptors of pine caterpillars, reducing their sensitivity to abamectin and Bacillus thuringiensis, increasing the probability of pine caterpillars feeding on the insecticide. Furthermore, menthol lactate can mask the original odor of the drug. Even if pine caterpillars are repelled by the odor of abamectin and Bacillus thuringiensis, it can still ensure that they feed on the mesoporous silica-loaded abamectin and the fiber-loaded Bacillus thuringiensis, thus enabling the insecticide to effectively kill pine caterpillars.

[0012] The rosin pentaerythritol ester facilitates the adhesion of abamectin, a mesoporous silica carrier, to the surface of Masson pine leaves. Combined with the unique permeability of menthyl lactate, it can not only penetrate the leaves but also pass through the body surface of pine caterpillars. When pine caterpillars that feed on the leaves directly ingest menthyl lactate, it interferes with the nervous system of pine caterpillars, causing paralysis and loss of mobility, thus inhibiting the reproduction of pine caterpillars. Furthermore, menthyl lactate can also affect the metabolism of pine caterpillars. Combined with its contact and stomach poison effects, it further kills pine caterpillars.

[0013] Preferably, the fiber carrier Bacillus thuringiensis is prepared from a lignin fiber, an ethyl cellulose composite liquid, and Bacillus thuringiensis in a mass ratio of 1:0.5-1:1-1.5.

[0014] By adopting the above technical solution, lignin fiber has a large specific surface area and a good adsorption effect. The binding effect of ethyl cellulose composite liquid is used to facilitate the binding of Bacillus thuringiensis. The binding and blocking effect of ethyl cellulose is used to protect Bacillus thuringiensis from rain, ultraviolet rays and temperature, thus ensuring the insecticidal effect of Bacillus thuringiensis on pine caterpillars.

[0015] Ethyl cellulose composite liquid can ensure the adhesion stability of Bacillus thuringiensis, the fiber carrier, on the leaf surface. After feeding, pine caterpillars can ingest toxins, which promotes the entry of Bacillus thuringiensis into the insect body, enabling the insecticide to effectively kill pine caterpillars.

[0016] Preferably, the ethyl cellulose composite solution is prepared from an ethyl cellulose solution and pine needle extract in a mass ratio of 1:0.1-0.15.

[0017] By employing the above-mentioned technical solution, ethyl cellulose solution and pine needle extract are combined. The pine needle extract contains terpenes such as α-pinene, which attract pine caterpillars to feed while simultaneously blocking the transmission of nerve signals in the caterpillars. This ensures the intake of both the caterpillars and Bacillus thuringiensis, and promotes the killing of the caterpillars.

[0018] Preferably, the filler is prepared from diatomaceous earth particles and terpinene-4-ol in a mass ratio of 1:0.01-0.03.

[0019] By adopting the above technical solution, diatomaceous earth microparticles utilize their porous structure and adsorption capacity to easily adsorb terpinene-4-ol. Terpinene-4-ol can penetrate into the body of pine caterpillars, interfering with their nervous system and metabolism, leading to abnormal behavior and physiological dysfunction, thus achieving an insecticidal effect. After adsorbing terpinene-4-ol, the diatomaceous earth microparticles have a good dispersion effect, improving the uniform distribution of active ingredients in wettable powder insecticides and enhancing the uniform spraying effect of insecticides.

[0020] Preferably, the adhesive is composed of fucoidan and carboxymethyl cellulose in a mass ratio of 1:0.5-1.

[0021] By adopting the above technical solution, the combination of fucoidan and carboxymethyl cellulose can attract pine caterpillars to feed on the insecticide, thereby improving the insecticidal effect; and can also form an adhesive gel film that binds to the plant surface with hydrogen bonds, thereby improving the resistance to rain erosion.

[0022] Preferably, the dispersant is sodium lignosulfonate.

[0023] By adopting the above technical solutions, the dispersion and suspension properties of the mesoporous silica carrier abamectin and the fiber carrier Bacillus thuringiensis can be improved. This also enhances the stability of the insecticide, prevents particle sedimentation or aggregation, and ensures that the insecticide adheres evenly to the surface of Masson pine leaves, thereby improving the insecticidal effect and uniformity. At the same time, sodium lignosulfonate can also improve the permeability of the active ingredients in the insecticide, further enhancing the insecticidal effect.

[0024] Preferably, the wetting agent is sodium dodecylbenzenesulfonate.

[0025] By adopting the above technical solution, sodium dodecylbenzene sulfonate can improve the spreading effect of insecticides on the leaf surface, increase the contact area, and thus improve the insecticidal effect. In combination with the wetting properties of sodium dodecylbenzene sulfonate, it can improve the penetration ability of insecticides. Sodium dodecylbenzene sulfonate can also improve the adhesion of insecticides, improve the adhesion stability of active ingredients on the plant leaf surface, and ensure the insecticidal effect and the duration of insecticidal effect.

[0026] Secondly, this application provides a method for preparing an insecticide using mesoporous silica as a carrier, employing the following technical solution: A method for preparing an insecticide using mesoporous silica as a carrier includes the following steps: S1. Weigh out the mesoporous silica carrier abamectin, the fiber carrier Bacillus thuringiensis, and the filler, mix and stir evenly to obtain the initial mixture; S2. Add dispersant, wetting agent and binder to the initial mixture and mix evenly to obtain the insecticide.

[0027] By adopting the above technical solution, the mesoporous silica-loaded abamectin, the fiber-loaded Bacillus thuringiensis, and the filler are first mixed and contacted to improve the contact connection effect between the filler and the mesoporous silica-loaded abamectin and the fiber-loaded Bacillus thuringiensis. Then, other fillers are added to ensure that the active ingredients are evenly dispersed, so that the insecticide has the advantage of effectively killing pine caterpillars on Masson pine.

[0028] In summary, this application has the following beneficial effects: 1. The combination of mesoporous silica-based abamectin and fiber-based Bacillus thuringiensis utilizes the slow-release and loading effects of mesoporous silica to minimize the impact of external environmental temperature and humidity on the effective activity of abamectin and Bacillus thuringiensis, ensuring the contact killing effect on pine caterpillars and extending the duration of the insecticide's action. Combined with dispersants, wetting agents, binders, and fillers, the insecticide's dispersion and spray uniformity during application are further improved, ensuring even adhesion of the insecticide to the surface of Masson pine leaves, thereby further promoting the killing of pine caterpillars and achieving highly efficient pine caterpillar control.

[0029] 2. The mesoporous structure of mesoporous silica facilitates the loading of abamectin. Then, a rosin pentaerythritol ester composite solution is used for encapsulation, preventing rainwater from washing away the abamectin and ensuring its long-lasting effect. Furthermore, the pore-blocking effect of the mesoporous silica, combined with the shielding effect of the rosin pentaerythritol ester composite solution film, prevents abamectin from being affected by light, ensuring its continuous killing effect on pine caterpillars. Simultaneously, the hydrophobic film formed by the rosin pentaerythritol ester allows the insecticide to firmly adhere to the pine needle surface, increasing the probability of contact with the caterpillars. When the caterpillars feed, it triggers targeted drug release, improving the accuracy of insecticidal action. Combined with the strong lipophilicity of the rosin pentaerythritol ester, it can dissolve the waxy layer on the caterpillar's body surface, accelerating drug penetration into the insect's body, thereby achieving a highly efficient killing effect on pine caterpillars.

[0030] 3. Lignin fiber has a large specific surface area and good adsorption effect. The binding effect of ethyl cellulose composite liquid is used to facilitate the binding of Bacillus thuringiensis. The binding and blocking effect of ethyl cellulose protects Bacillus thuringiensis from rain, ultraviolet rays and temperature, thus ensuring the insecticidal effect of Bacillus thuringiensis on pine caterpillars. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the embodiments.

[0032] Example of preparation of avermectin with mesoporous silica carrier Among the following raw materials, pentaerythritol rosin was purchased from Shangrao Sinan Resin Co., Ltd.; menthyl lactate was purchased from Hebei Chuangzhiyuan Biotechnology Co., Ltd.; mesoporous silica was purchased from Beijing Zhongke Keyou Technology Co., Ltd.; abamectin was purchased from Hubei Qiniu Chemical Technology Co., Ltd.; and other raw materials and equipment were commercially available.

[0033] Preparation Example 1: Avermectin, a mesoporous silica carrier, was prepared using the following method: Rosin pentaerythritol ester was placed in ethyl acetate and stirred until completely dissolved to obtain a 1% (w / w) rosin pentaerythritol ester solution. 1 kg of rosin pentaerythritol ester solution was mixed with 0.15 kg of menthyl lactate and stirred evenly to obtain a rosin pentaerythritol ester composite solution. 2.45 kg of mesoporous silica was placed in 10 kg of anhydrous ethanol. The average particle size of the mesoporous silica was 200 nm and the average open porosity was 70%. It was soaked and dispersed at 20 kHz for 10 min. Then, 1 kg of abamectin was added and ultrasonically dispersed at 20 kHz for 30 min. The temperature was then raised to 80 °C and dispersion continued until all the anhydrous ethanol evaporated to obtain the loaded material. 0.55 kg of rosin pentaerythritol ester composite liquid was uniformly sprayed on the surface of the loaded material. After drying and dispersion until the mesoporous silica did not stick together and agglomerate, the mesoporous silica loaded with abamectin was obtained.

[0034] Preparation Example 2: The difference between this preparation example and Preparation Example 1 is that: 1 kg of rosin pentaerythritol ester solution was mixed with 0.1 kg of lactic acid menthyl ester and stirred evenly to obtain rosin pentaerythritol ester composite solution; 2.2 kg of mesoporous silica was placed in 10 kg of anhydrous ethanol. The average particle size of the mesoporous silica was 200 nm and the average open porosity was 70%. It was soaked and dispersed at 20 kHz for 10 min. Then, 1 kg of abamectin was added and ultrasonically dispersed at 20 kHz for 30 min. The temperature was then raised to 80 °C and dispersion was continued until all the anhydrous ethanol evaporated to obtain the loaded material. 0.8 kg of rosin pentaerythritol ester composite liquid was uniformly sprayed on the surface of the loaded material. After drying and dispersion, the mesoporous silica-loaded abamectin was obtained.

[0035] Preparation Example 3: The difference between this preparation example and Preparation Example 1 is that: 1 kg of rosin pentaerythritol ester solution was mixed with 0.2 kg of lactic acid menthyl ester and stirred evenly to obtain rosin pentaerythritol ester composite solution; 2.6 kg of mesoporous silica was placed in 10 kg of anhydrous ethanol. The average particle size of the mesoporous silica was 200 nm and the average open porosity was 70%. It was soaked and dispersed at 20 kHz for 10 min. Then, 1 kg of abamectin was added and ultrasonically dispersed at 20 kHz for 30 min. The temperature was then raised to 80 °C and dispersion was continued until all the anhydrous ethanol evaporated to obtain the loaded material. 0.4 kg of rosin pentaerythritol ester composite liquid was uniformly sprayed on the surface of the loaded material. After drying and dispersion, the mesoporous silica-loaded abamectin was obtained.

[0036] Example of preparing Bacillus thuringiensis as a fiber carrier The pine needle extract in the following raw materials was purchased from Shaanxi Muyun Biotechnology Co., Ltd.; Bacillus thuringiensis was purchased from Wuhan Kemic Biomedical Technology Co., Ltd.; the other raw materials were all commercially available.

[0037] Preparation Example 4: The fiber-loaded Bacillus thuringiensis was prepared using the following method: Ethyl cellulose was placed in ethanol and stirred until completely dissolved to obtain an ethyl cellulose solution with an ethoxy content of 50%. 1 kg of ethyl cellulose solution was mixed with 0.12 kg of pine needle extract and stirred evenly to obtain an ethyl cellulose composite solution with an average particle size of 3 μm for the pine needle extract. 0.8 kg of ethyl cellulose composite liquid was uniformly sprayed onto the surface of 1 kg of lignin fiber, and then 1.2 kg of Bacillus thuringiensis was added. The average particle size of the lignin fiber was 20 μm, and the average particle size of Bacillus thuringiensis was reduced to 3 μm. After drying and dispersion, Bacillus thuringiensis on fiber was obtained and passed through a 400-mesh sieve.

[0038] Preparation Example 5: The difference between this preparation example and Preparation Example 4 is that: Ethyl cellulose was placed in ethanol and stirred until completely dissolved to obtain an ethyl cellulose solution. 1 kg of ethyl cellulose solution was mixed with 0.1 kg of pine needle extract and stirred evenly to obtain an ethyl cellulose composite solution. The average particle size of the pine needle extract was 3 μm. 0.5 kg of ethyl cellulose composite liquid was uniformly sprayed onto the surface of 1 kg of lignin fiber, and then 1.5 kg of Bacillus thuringiensis was added. The average particle size of the lignin fiber was 20 μm, and the average particle size of Bacillus thuringiensis was reduced to 3 μm. After drying and dispersion, Bacillus thuringiensis on fiber was obtained and passed through a 400-mesh sieve.

[0039] Preparation Example 6: The difference between this preparation example and Preparation Example 4 is that: Ethyl cellulose was placed in ethanol and stirred until completely dissolved to obtain an ethyl cellulose solution. 1 kg of ethyl cellulose solution was mixed with 0.15 kg of pine needle extract and stirred evenly to obtain an ethyl cellulose composite solution. The average particle size of the pine needle extract was 3 μm. 1 kg of ethyl cellulose composite liquid was uniformly sprayed onto the surface of 1 kg of lignin fiber, and then 1 kg of Bacillus thuringiensis was added. The average particle size of the lignin fiber was 20 μm, and the average particle size of Bacillus thuringiensis was reduced to 3 μm. After drying and dispersion, Bacillus thuringiensis was obtained as the fiber carrier and passed through a 400-mesh sieve.

[0040] Example of filler preparation Among the following raw materials, terpinene-4-ol was purchased from Hubei Xinyuhong Biomedical Technology Co., Ltd.; the other raw materials were all commercially available.

[0041] Preparation Example 7: The packing material was prepared using the following method: 0.2 kg of terpinene-4-ol was uniformly sprayed onto 10 kg of diatomaceous earth particles. The average particle size of the diatomaceous earth was 30 μm. During the spraying process, the diatomaceous earth particles were continuously stirred at a speed of 120 r / min. After uniform mixing, the filler was obtained and passed through a 400 mesh sieve.

[0042] Preparation Example 8: The difference between this preparation example and Preparation Example 7 is that: 0.1 kg of terpinene-4-ol was uniformly sprayed onto 10 kg of diatomaceous earth particles. The average particle size of the diatomaceous earth was 30 μm. During the spraying process, the diatomaceous earth particles were continuously stirred at a speed of 120 r / min. After uniform mixing, the filler was obtained and passed through a 400 mesh sieve.

[0043] Preparation Example 9: The difference between this preparation example and Preparation Example 7 is that: 0.3 kg of terpinene-4-ol was uniformly sprayed onto 10 kg of diatomaceous earth particles. The average particle size of the diatomaceous earth was 30 μm. During the spraying process, the diatomaceous earth particles were continuously stirred at a speed of 120 r / min. After uniform mixing, the filler was obtained and passed through a 400 mesh sieve. Example

[0044] All of the following ingredients are commercially available.

[0045] Example 1: An insecticide using mesoporous silica as a carrier: The composition of the materials is as follows: 1.2% avermectin as mesoporous silica carrier, 3% Bacillus thuringiensis as fiber carrier, 3.5% dispersant, 3.5% wetting agent, 1.8% binder, and filler to 100%. The avermectin as mesoporous silica carrier is the same as that prepared in Preparation Example 1, the Bacillus thuringiensis as fiber carrier is the same as that prepared in Preparation Example 4, the dispersant is sodium lignosulfonate, the wetting agent is sodium dodecylbenzenesulfonate, the binder is composed of fucoidan and carboxymethyl cellulose in a mass ratio of 1:1, and the filler is the same as that prepared in Preparation Example 7. The preparation method is as follows: S1. Weigh out the mesoporous silica carrier abamectin, the fiber carrier Bacillus thuringiensis, and the filler, mix and stir evenly to obtain the initial mixture; S2. Add dispersant, wetting agent and binder to the initial mixture and mix evenly to obtain the insecticide.

[0046] Example 2: The difference between this example and Example 1 is that: The composition of the materials is as follows: 1% avermectin as a mesoporous silica carrier, 2.6% Bacillus thuringiensis as a fiber carrier, 2% dispersant, 2% wetting agent, 1% binder, and filler to 100%. The avermectin as a mesoporous silica carrier is the one prepared in Preparation Example 2, the Bacillus thuringiensis as a fiber carrier is the one prepared in Preparation Example 5, the dispersant is sodium lignosulfonate, the wetting agent is sodium dodecylbenzenesulfonate, the binder consists of fucoidan and carboxymethyl cellulose in a mass ratio of 1:0.5, and the filler is the one prepared in Preparation Example 8.

[0047] Example 3: The difference between this example and Example 1 is that: The composition of the materials is as follows: 1.5% avermectin as mesoporous silica carrier, 3.2% Bacillus thuringiensis as fiber carrier, 5% dispersant, 5% wetting agent, 2% binder, and filler to 100%. The avermectin as mesoporous silica carrier is the same as that prepared in Preparation Example 3, the Bacillus thuringiensis as fiber carrier is the same as that prepared in Preparation Example 6, the dispersant is sodium lignosulfonate, the wetting agent is sodium dodecylbenzenesulfonate, the binder consists of fucoidan and carboxymethyl cellulose in a mass ratio of 1:0.8, and the filler is the same as that prepared in Preparation Example 9.

[0048] Example 4: The difference between this example and Example 1 is that: In the preparation of avermectin with mesoporous silica as a carrier, the same mass of carboxymethyl cellulose solution was used to replace the rosin pentaerythritol ester composite solution.

[0049] Example 5: The difference between this example and Example 1 is that: No menthyl lactate was added to the rosin pentaerythritol ester composite solution of abamectin loaded with mesoporous silica.

[0050] Example 6: The difference between this example and Example 1 is that: In the preparation of the fiber carrier Bacillus thuringiensis, an equal mass of carboxymethyl cellulose solution was used to replace the ethyl cellulose composite solution.

[0051] Example 7: The difference between this example and Example 1 is that: No pine needle extract was added to the Bacillus thuringiensis ethyl cellulose composite solution used as a fiber carrier.

[0052] Example 8: The difference between this example and Example 1 is that: The filler is diatomaceous earth particles.

[0053] Comparative Example Comparative Example 1: The difference between this comparative example and Example 1 is that: In the raw materials, the mesoporous silica carrier abamectin was replaced with an equal mass of abamectin, and the fiber carrier Bacillus thuringiensis was replaced with an equal mass of Bacillus thuringiensis.

[0054] Performance testing 1. Insecticidal activity test Insecticides were prepared using the methods of Examples 1-8 and Comparative Example 1, and then diluted 1000 times with water to obtain sprays; the pine caterpillars were 3rd instar larvae. Release 1000 pine caterpillars on 200 Masson pine trees, then spray 30L of sprayer onto the surface of the Masson pine leaves where the caterpillars were released, wait 84 hours, observe the insecticidal effect, and record the insecticidal rate. 30L of spray was applied to the leaf surface of 200 Masson pine trees for 10 days. Then, 1000 pine caterpillars were released onto the sprayed leaf surface. After 84 hours, the insecticidal effect was observed and the long-lasting insecticidal rate was recorded. 1,000 pine caterpillars were released on 200 Masson pine trees. Then, 30L of spray was applied to the surface of the pine leaves. Two days later, 1 ton of water was sprayed evenly to simulate rainfall. After waiting for 84 hours, the insecticidal effect was observed and the insecticidal rate after spraying was recorded.

[0055] Table 1 Performance Test Table

[0056] As can be seen from Examples 1-3 and Table 1, the insecticide prepared in this application has a good insecticidal effect, and the activity of the insecticide is not easily affected by the external environment humidity and ultraviolet rays, ensuring the insecticidal effect. At the same time, it has good water resistance, and still has a good insecticidal effect even when washed by rain.

[0057] Combining Examples 1 and 4-8 with Table 1, it can be seen that in the preparation of avermectin using mesoporous silica as a carrier in Example 4, the same Equal When a certain amount of carboxymethyl cellulose solution was used to replace the rosin pentaerythritol ester compound solution, compared to Example 1, the insecticidal rate of Example 4 was lower than that of Example 1, the long-lasting insecticidal rate was lower than that of Example 1, and the insecticidal rate after spraying water was lower than that of Example 1. This indicates that the carboxymethyl cellulose solution is hydrophilic, and the humidity of the external environment and the amount of water sprayed can easily affect the insecticidal activity of abamectin, resulting in a decrease in the insecticidal effect of the insecticide.

[0058] In Example 5, the rosin pentaerythritol ester composite solution of mesoporous silica carrier abamectin did not contain menthyl lactate. Compared with Example 1, the insecticidal rate of Example 5 was lower than that of Example 1, the long-lasting insecticidal rate was lower than that of Example 1, and the insecticidal rate after spraying water was lower than that of Example 1. This indicates that the combination of rosin pentaerythritol ester and menthyl lactate can resist the influence of the external environment, and menthyl lactate has a better penetration effect, which can effectively kill pine caterpillars.

[0059] In Example 6, during the preparation of Bacillus thuringiensis fiber carrier, an equal mass of carboxymethyl cellulose solution was used to replace the ethyl cellulose composite solution. Compared to Example 1, the insecticidal rate of Example 6 was lower than that of Example 1, the long-lasting insecticidal rate was lower than that of Example 1, and the insecticidal rate after spraying water was lower than that of Example 1. This indicates that the hydrophilic and hygroscopic nature of carboxymethyl cellulose easily affects the activity and efficacy of Bacillus thuringiensis, thus impacting the insecticidal effect.

[0060] In Example 7, no pine needle extract was added to the ethyl cellulose composite solution of Bacillus thuringiensis fiber carrier. Compared with Example 1, the insecticidal rate of Example 7 was lower than that of Example 1, the long-term insecticidal rate was lower than that of Example 1, and the insecticidal rate after spraying water was lower than that of Example 1. This indicates that pine needle extract can attract pine caterpillars and assist in killing them, thereby improving the killing effect of pine caterpillars.

[0061] Example 8 uses diatomaceous earth microparticles as filler. Compared to Example 1, Example 8 has a lower insecticidal rate, a lower long-lasting insecticidal rate, and a lower insecticidal rate after water spraying. This indicates that terpinene-4-ol can penetrate into the body of pine caterpillars, interfere with their nervous system and metabolism, disrupt their physiological functions, and achieve an insecticidal effect, thereby improving the uniform spraying effect of the insecticide.

[0062] Combining Example 1 and Comparative Example 1 with Table 1, it can be seen that in Comparative Example 1, the same mass of abamectin was used to replace the mesoporous silica carrier abamectin, and the same mass of Bacillus thuringiensis was used to replace the fiber carrier Bacillus thuringiensis. Compared with Example 1, Comparative Example 1 had a lower insecticidal rate, a lower long-lasting insecticidal rate, and a lower insecticidal rate after water spraying. This indicates that the combination of mesoporous silica carrier abamectin and fiber carrier Bacillus thuringiensis effectively minimizes the impact of external environmental temperature and humidity on the effective activity of abamectin and Bacillus thuringiensis, ensuring the contact killing effect on pine caterpillars and prolonging the duration of the insecticide's action.

[0063] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An insecticide with mesoporous silica as a carrier, characterized in that, The raw materials include 1-1.5% of mesoporous silica loaded avermectin, 2.6-3.2% of fiber loaded bacillus thuringiensis, 2-5% of dispersant, 2-5% of wetting agent, 1-2% of binder, and the rest of filler.

2. The insecticide with mesoporous silica as carrier according to claim 1, characterized in that: The mesoporous silica loaded avermectin is prepared by loading avermectin on mesoporous silica with a mass ratio of 2.2-2.6:1:0.4-0.8, and then adding rosin pentaerythritol ester complex solution.

3. The insecticide supported on mesoporous silica according to claim 2, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The rosin pentaerythritol ester complex solution is prepared by mixing rosin pentaerythritol ester solution and menthyl lactate with a mass ratio of 1:0.1-0.

2. ​ 4. The insecticide supported on mesoporous silica according to claim 1, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The fiber loaded bacillus thuringiensis is prepared by mixing lignin fiber, ethyl cellulose complex solution and bacillus thuringiensis with a mass ratio of 1:0.5-1:1-1.

5. ​ 5. The insecticide supported on mesoporous silica according to claim 4, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The ethyl cellulose complex solution is prepared by mixing ethyl cellulose solution and pine needle extract with a mass ratio of 1:0.1-0.

15. ​ 6. The insecticide supported on mesoporous silica according to claim 1, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The filler is prepared by mixing diatomite microparticles and terpinene-4-ol with a mass ratio of 1:0.01-0.

03. ​ 7. The insecticide supported on mesoporous silica according to claim 1, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The binder is composed of fucoidan and carboxymethyl cellulose with a mass ratio of 1:0.5-1.

8. The insecticide supported on mesoporous silica according to claim 1, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The dispersant is sodium lignosulfonate. ​ 9. The insecticide supported on mesoporous silica according to claim 1, wherein the mesoporous silica is represented by the following formula: ###0001### wherein R represents a C1-4 alkyl group, and n represents an integer of 1 to 3. The wetting agent is sodium dodecylbenzenesulfonate.

10. A process for the preparation of an insecticide supported on mesoporous silica according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1, weighing mesoporous silica loaded avermectin, fiber loaded bacillus thuringiensis and filler, mixing and stirring uniformly to obtain initial mixture; S2, adding dispersant, wetting agent and binder to the initial mixture, mixing and stirring uniformly to obtain the insecticide.

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