Volatile cockroach-killing solid gel containing S-hydroprene

Abstract

The invention relates to the technical field of sanitary insect killing, in particular to volatile cockroach-killing solid gel containing S-hydroprene. The water-soluble insect-killing liquid comprises S-hydroprene, agar, carrageenan, glycerin, ethanol, propylene glycol, sodium benzoate, an emulsifier and deionized water. According to the volatile cockroach-killing solid gel containing the S-hydroprene, the S-hydroprene is taken as a core active component, the S-hydroprene is taken as an insect growth regulator, the S-hydroprene is volatilized and diffused to a cockroach activity area, after the S-hydroprene is in contact with or inhaled by cockroaches, cockroach breeding can be inhibited, sterility or offspring malformation of the cockroaches is caused, and the population number is controlled from the source; different from the problems that the traditional physical killing of populations difficult to control, the risk of eating poison bait and poison powder by mistake, the environmental pollution caused by aerosol and smoke methods and the like, the gel does not need to be frequently applied, can effectively solve the problems of repeated breeding, diffusion and propagation of cockroaches through continuous action in a volatilization form, and avoids the problems of potential safety hazards and environmental pollution of the traditional chemical control method.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary insecticides, in particular to a volatile cockroach-killing solid gel containing S-methoprene. Background Art

[0002] Cockroaches are insects with strong adaptability and reproductive ability. They mostly live in warm and humid environments and pose a great threat to human life. For example, they pollute the environment and leave secretions and excrement on food and the surface of objects; they can spread diseases and carry various bacteria, fungi, viruses, parasites and other pathogens; they can also cause allergic reactions in people, leading to allergic dermatitis, rhinitis and allergic asthma; they can also harm electrical equipment, drill into electronic equipment and cause short circuit failures, and even invade the human external auditory canal at night.

[0003] There are over 5,000 named cockroach species worldwide. In my country, 20 species from 11 genera and six families are commonly found indoors. Among these, the German cockroach and the American cockroach are closely associated with human activities. The German cockroach is most widely distributed in my country. These cockroaches prefer warm, humid habitats with abundant food and many crevices. Their reproductive capacity increases and their activity is more frequent during hot seasons.

[0004] In the existing technology, indoor cockroach control mainly adopts physical killing, poison bait placement, aerosol spraying, residual spraying and fog method. Physical killing, such as sticky cockroach paper, is environmentally friendly, but the trapping efficiency is limited, making it difficult to control the population from the source; poison bait and poison powder must be used with caution, as children or pets may accidentally ingest them and this may cause safety hazards, and the exposure of the agent to the environment may cause the degradation of the active ingredients; although aerosol and fog methods can quickly kill insects, they will pollute indoor air, and residual agents may endanger human health. At the same time, frequent use can easily accelerate the development of drug resistance in cockroaches; residual spraying requires applying the drug in the crevices where cockroaches live, which is cumbersome to operate, and long-term use of the same type of insecticide will reduce the control effect and affect the sustainability of control, making it difficult for traditional methods to achieve long-term cockroach control and unable to effectively solve the problem of repeated breeding and spread of cockroaches. In view of this, there is an urgent need for a volatile cockroach-killing solid gel containing S-methoprene. Summary of the Invention

[0005] The object of the present invention is to provide a volatile cockroach-killing solid gel containing S-methoprene to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, according to Figure 1 As shown, the present invention provides a volatile cockroach-killing solid gel containing S-methoprene, comprising S-methoprene, agar, carrageenan (K type), glycerol, ethanol, propylene glycol, sodium benzoate, an emulsifier and deionized water, and further comprising the following steps of preparing the cockroach-killing solid gel: S1. Dissolution and emulsification of the active ingredient: Add ethanol and propylene glycol to a reaction vessel, mix in a 1:1 ratio, and stir uniformly to form a mixed solvent with a synergistic solubilization effect. Then, add S-methoprene to the mixed solvent and gently heat at ≤40°C to aid dissolution. Stir continuously until the solution is completely transparent and clear to prevent high temperature from damaging the active ingredient. Next, add an emulsifier to the solution, and stir the reaction vessel at 200-300 r / min for 10-15 minutes to uniformly disperse the S-methoprene in the solvent to form a stable emulsion. S2. Prepare the gel base solution: Add deionized water to a beaker and heat to 80°C. Add agar and carrageenan (K type) in sequence. Use a stirrer to stir continuously at 150-200 r / min for 10-15 minutes until the colloid is completely dissolved and no particles are visible, forming a uniform gel matrix solution. Then, naturally cool the gel matrix solution to 50°C and add glycerol and sodium benzoate. Glycerol can adjust the hardness of the gel to prevent the matrix from being too soft and difficult to form. Sodium benzoate acts as a preservative to extend the shelf life of the product. Stir continuously at 150-200 r / min for 5-8 minutes to allow the two to work together to form a more stable three-dimensional network structure, making the gel matrix stronger and more elastic, capable of carrying high concentrations of S-methoprene and optimizing the physical properties of the gel. S3. Dissolution and Strengthening of the Gel Matrix: When the gel base liquid temperature drops below 45°C, pour the S-methoprene emulsion into the base liquid and rapidly stir at 300-400 rpm for 3-5 minutes to evenly mix the active ingredient and gel matrix to prevent precipitation due to localized high concentrations. The mixture is then poured into a silicone or plastic mold and allowed to set at room temperature for 2 hours or refrigerated at 4°C for 30-35 minutes to set. Slow cooling minimizes shrinkage and cracking of the gel, ultimately forming a solid gel with a smooth surface and a firm structure. S4. Post-processing: De-mold the shaped gel and place it in a ventilated environment for 12-14 hours to allow the residual ethanol to evaporate slowly to prevent the solvent odor from affecting the use environment. Then, store the gel in a sealed bag to prevent moisture loss from causing the gel to dry out and affect the volatilization rate of the active ingredients. Finally, place the gel in a volatilization box with air holes. The air holes control the contact area between the gel and the air, allowing S-methoprene in the solid gel to evaporate, allowing the product to continuously release the active ingredients indoors, and the efficacy can be stably maintained for 10-12 weeks.

[0007] In the invention, S-methoprene is first dissolved in a mixed solvent system formed by compounding ethanol and propylene glycol in a 1:1 ratio. This not only improves the solubility of the active ingredient and regulates the volatilization rate, avoiding a reduction in efficacy due to rapid precipitation, but also forms a stable dispersion system with the help of the emulsification effect of Tween-80. For example, S-methoprene is evenly encapsulated in the three-dimensional network structure of the gel matrix. This can also effectively improve the diffusion uniformity and sustained release effect of the active ingredient in the air, ensuring long-term control of cockroach populations.

[0008] Preferably, the S-methoprene accounts for 15%-35% of the total weight of the formula. As the core insecticide active ingredient, S-methoprene diffuses into the cockroach activity area through volatilization, inhibits the reproduction of cockroaches after contact or inhalation, leading to infertility or offspring deformity, and controls the population size from the source; the agar accounts for 8%-15% of the total weight of the formula. As the main component of the gel matrix, it can form a three-dimensional network structure after cooling after heating and dissolving, thereby improving the gel strength and supporting high-concentration active ingredients; the carrageenan accounts for 2%-5% of the total weight of the formula. K-type carrageenan is used, which can be compounded with agar to increase Strong gel elasticity, optimize the physical properties of the matrix, and make the gel structure more stable; the glycerin accounts for 10%-12% of the total weight of the formula and acts as a humectant to adjust the softness and hardness of the gel, reduce the risk of the gel being too soft, and ensure formability; the ethanol accounts for 4%-5% of the total weight of the formula; the propylene glycol accounts for 4%-5% of the total weight of the formula and can cooperate with ethanol as a solvent to improve the solubility of S-methoprene and control the volatilization rate; the sodium benzoate accounts for 1% of the total weight of the formula and acts as a preservative to inhibit microbial growth and extend the shelf life of the product; the emulsifier accounts for 2% of the total weight of the formula and uses Tween-80 to help S-methoprene be evenly dispersed in the solvent, prevent oil droplets from agglomerating, and avoid the precipitation of active ingredients; the deionized water accounts for the balance of the total weight of the formula.

[0009] In addition, by mixing agar and K-type carrageenan, the three-dimensional network structure formed by agar after heating and dissolving and then cooling can provide basic strength to the gel, while K-type carrageenan further strengthens the network cross-linking density through the hydrogen bonding between its double helix structure and agar molecules. This is mainly because the galactose residues in agar and the sulfate groups of K-type carrageenan form an interpenetrating network through hydrogen bonds, which not only enhances the elasticity and fracture resistance of the gel, but also improves the matrix's carrying capacity for high concentrations of S-methoprene, allowing the gel to maintain an appropriate volatilization rate while avoiding damage to the matrix structure due to excessive concentrations of active ingredients, thereby allowing S-methoprene in the solid gel to be released continuously and stably.

[0010] Preferably, according to Figure 2As shown, the volatilization box includes a square box B made of glass with an inner diameter of 1000 mm in length, width, and height. A bracket E is provided below the square box B. A tray A for placing S-methoprene volatile cockroach killing solid gel is placed inside the square box B. A small door C with a width and height of 100 mm is opened at any lower corner of one side of the square box B. A 50 mm diameter insect hole F is also opened above the side, which is plugged with a rubber plug during testing. The other side of the square box B is a door D.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This volatile cockroach-killing solid gel containing S-methoprene has S-methoprene as the core active ingredient. As an insect growth regulator, it diffuses into cockroach activity areas through volatilization. When cockroaches come into contact with or inhale it, it can inhibit cockroach reproduction, causing infertility or deformed offspring, thereby controlling the population at the source. Unlike traditional physical extermination methods that are difficult to control, the risk of accidental ingestion of poison bait and powder, and the environmental pollution of aerosol and smoke methods, this gel does not require frequent application and acts continuously through volatilization, which can effectively solve the problem of repeated cockroach breeding and spread, and avoid the safety hazards and environmental pollution problems of traditional chemical control methods.

[0012] 2. In the volatile cockroach-killing solid gel containing S-methoprene, a mixed solvent system of ethanol and propylene glycol in a ratio of 1:1 is used to dissolve S-methoprene, and a stable dispersion system is formed through the emulsification effect of Tween-80. At the same time, agar and K-type carrageenan are compounded to construct a gel matrix, so that S-methoprene is evenly wrapped in the three-dimensional network structure of the gel matrix. This can not only improve the solubility of the active ingredient, regulate the volatilization rate, and avoid rapid precipitation, but also effectively improve its diffusion uniformity and sustained release effect in the air, so that the drug efficacy can be stably maintained for 10-12 weeks, thereby achieving long-term control of cockroach populations.

[0013] 3. This volatile cockroach-killing solid gel containing S-methoprene utilizes an optimized step-by-step mixing and slow cooling process. The gel matrix is ​​first dissolved and cooled before the active ingredient solution is added, preventing high-temperature damage to the active ingredients. Furthermore, the gel is cured by allowing the gel to set at room temperature or refrigerated to minimize shrinkage cracks and ensure the stability of the gel structure. After forming, the gel is placed in a volatile cartridge with air holes. The volatile rate is precisely controlled by controlling the contact area with air. The product does not require heating or power. When in use, it can be placed in cockroach-prone areas such as kitchens and bathrooms, where it evaporates automatically, making it easy to operate. The sealed storage design prevents moisture loss, ensuring the product's effectiveness throughout its lifespan, thereby enhancing its practicality and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a flowchart of the preparation process of the volatile cockroach-killing solid gel containing S-methoprene of the present invention; Figure 2 It is a schematic structural diagram of the volatilization box of the present invention.

[0015] The meaning of each number in the figure is: A. Pallet; B. Square box; C. Small door; D. Big door; E. Bracket; F. Insect hole. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0017] Example 1 Dissolve 25g of S-methoprene in a mixed solvent of 4g of ethanol and 4g of propylene glycol. Slightly heat and stir at no more than 40°C until the solution is transparent, then add 2g of Tween-80 and stir evenly. Add 40ml of deionized water to a beaker, heat to 80°C, then add 10g of agar and 2g of carrageenan (type K), and continue stirring until completely dissolved and free of particles. After the gel matrix solution is cooled to 50°C, add 12g of glycerol and 1g of sodium benzoate and mix evenly. When the base liquid temperature drops below 45°C, slowly pour the S-methoprene solution and stir rapidly. Then pour it into a mold and let it stand at room temperature for 2h to set. After demolding, ventilate and air dry for 12h to remove residual ethanol. Finally, store in a sealed bag and place in a volatilization box when used.

[0018] Example 2 Dissolve 15g of S-methoprene in a mixture of 4g of ethanol and 4g of propylene glycol, heat and stir at ≤40°C until transparent, then add 2g of Tween-80 and stir evenly. Heat 40ml of deionized water to 80°C, add 8g of agar and 2g of carrageenan (type K), and stir until completely dissolved. Allow the matrix solution to cool to 50°C, then add 10g of glycerol and 1g of sodium benzoate and mix. When the matrix solution temperature is below 45°C, pour the S-methoprene solution into the mixture and stir rapidly. Pour the mixture into a mold and let it stand at room temperature for 2 hours to set. After demolding, ventilate and air-dry for 12 hours, store in a sealed bag, and place in a volatilization box when in use.

[0019] Example 3 Dissolve 35g of S-methoprene in a mixed solvent of 5g of ethanol and 5g of propylene glycol, heat and stir at no more than 40°C until transparent, then add 2g of Tween-80 and stir evenly. Heat 40ml of deionized water in a beaker to 80°C, add 15g of agar and 5g of carrageenan (type K), and stir until completely dissolved and free of particles. When the base solution is cooled to 50°C, add 12g of glycerol and 1g of sodium benzoate and mix. When the base solution temperature drops below 45°C, pour the S-methoprene solution into the mold and stir rapidly. Pour the solution into a mold and refrigerate at 4°C for 30 minutes to set. After demolding, ventilate and air-dry for 12 hours, store in a sealed bag, and place in a volatilization box when in use.

[0020] Table 1 Amounts of raw materials used in Examples 1-3

[0021] In order to verify that the cockroach-killing solid gel prepared in the embodiment of the present invention has good cockroach-killing activity and long-lasting effect, the cockroach-killing solid gel provided in the embodiment of the present invention is described through the following test examples.

[0022] Test example The purpose of this test group is to explore the effects of different component ratios on the cockroach-killing solid gel and to detect the cockroach population inhibition effect, volatilization rate and duration of efficacy of the cockroach-killing solid gel of the present invention.

[0023] Test objectives: Test groups A, B, and C respectively used the component ratios of the cockroach-killing solid gel provided in Examples 1-3; the control examples used control groups A, B, C, D, E, and F, wherein: Control group A Use cardboard as the base, and evenly apply a sticky glue layer made by heating natural rubber, resin and paraffin in a ratio of 3:2:1 on its surface. The thickness of the glue layer is controlled at 0.5-1mm. Then sprinkle a small amount of flour on the surface of the glue layer as an attractant, cut it into 10cm×15cm sheets, and store it in a waterproof packaging bag. When in use, place it directly in the corner where cockroaches are infested.

[0024] Control group B Mix 90g flour and 5g sucrose evenly, add 4g cypermethrin and 1g attractant (ethyl levulinate), then slowly add appropriate amount of water and stir into a paste. Use an extruder to make granular poison bait with a diameter of about 5mm. Dry it at 30-40℃ until the moisture content is less than 5%. Put 5g of poison bait into a small plastic box, open a feeding hole with a diameter of 5mm on the lid of the box, and place the poison bait box in the cockroach activity area when using.

[0025] Control group C Add 80ml of deionized water to a reactor, followed by 5g of permethrin, 3g of an emulsifier (sodium dodecylbenzenesulfonate), and 10g of ethanol. Stir at 200 rpm for 30 minutes until thoroughly mixed to create an insecticide solution. Fill the solution into a metal can with a pressure valve and fill the can with a mixture of propane and butane as a propellant (propellant to solution ratio of 1:4 by volume). After filling, install a nozzle to create an insecticide aerosol. Spray directly onto cockroach activity areas.

[0026] Control group D Add 10g of agar to 40ml of deionized water, heat to 80°C, and stir until dissolved. When the temperature drops to 50°C, add 12g of glycerin and 1g of sodium benzoate and mix. Once the base solution temperature drops below 45°C, add 25g of cypermethrin emulsifiable concentrate and stir rapidly. Pour the mixture into a mold and let it sit at room temperature for 2 hours to set. After demolding, store the mixture in a sealed bag. When using, apply the gel to crevices where cockroaches inhabit to form a film.

[0027] Control group E Dissolve 25g of S-methoprene in a mixture of 4g of ethanol and 4g of propylene glycol. Heat and stir at ≤40°C until transparent. Add 2g of Tween-80 and stir thoroughly. Heat 40ml of deionized water to 80°C and add 12g of agar and stir until completely dissolved. When the base solution cools to 50°C, add 12g of glycerol and 1g of sodium benzoate and mix. When the base solution temperature is below 45°C, pour the S-methoprene solution into the mold and stir rapidly. Pour the mold into the mold and let it stand at room temperature for 2 hours to set. After demolding, air dry for 12 hours. Store in a sealed bag and place in a volatilization box before use.

[0028] Control group F Dissolve 25g of S-methoprene in a mixed solvent of 4g of ethanol and 4g of propylene glycol, heat and stir at no more than 40°C until transparent, then add 2g of Tween-80 and stir evenly. Heat 40ml of deionized water in a beaker to 80°C, add 10g of agar and 2g of carrageenan (K-type), and stir until completely dissolved. When the base solution cools to 50°C, add 1g of sodium benzoate and mix. When the base solution temperature drops below 45°C, pour the S-methoprene solution into the mixture and stir rapidly. Pour the mixture into a mold and refrigerate at 4°C for 30 minutes to set. After demolding, ventilate and air dry for 12 hours. Store in a sealed bag and place in a volatilization box when in use.

[0029] Test method: According to the cockroach population inhibition effect, volatilization rate and duration of efficacy of the cockroach killing solid gel of the present invention, tests were conducted respectively. The specific test methods are as follows: Cockroach population suppression effect: A glass box apparatus (length × width × height = 1000 mm × 1000 mm × 1000 mm) was used. 30 V-stage German cockroach adults were placed into the box through the insect release hole. After sealing, the box was respectively placed with gel samples of test group A (Example 1), test group B (Example 2), and test group C (Example 3) and samples of each control group. The experimental conditions were controlled at a temperature of (26±1)°C and a relative humidity of 60%±10%. After 90 minutes, the test cockroaches were transferred to clean insect cages and fed with mixed feed blocks and soaked cotton balls. After 25 days, the number of dead and deformed cockroaches was counted. Three replicates were set for each group, and a blank group (no drug) was used as a control. Where: mortality rate (%) = (number of dead cockroaches / total cockroaches) × 100%; deformity rate (%) = (number of deformed cockroaches / total cockroaches) × 100%; corrected mortality rate (%) = [(death rate of test group - death rate of blank group) / (1 - death rate of blank group)] × 100%.

[0030] Table 2 is the cockroach population suppression effect detection index

[0031] As shown in Table 2, the corrected mortality rates of test groups A, B, and C were 87%, 81%, and 95%, respectively, all higher than those of the blank control group. Among them, the corrected mortality rate of test group C (S-methoprene content 35%) was the highest, and the deformity rate reached 10%, indicating that high concentrations of active ingredients can more effectively inhibit cockroach reproduction and cause deformities in offspring. This verifies that S-methoprene can control the population size at the source after being contacted or inhaled by cockroaches through volatilization, and that the gel matrix of agar and carrageenan can stably carry high concentrations of active ingredients, thereby improving the efficacy of the drug.

[0032] Volatility rate: Take 20g of gel sample and place it in an open glass culture dish with a diameter of 5cm. Place it in a constant temperature and humidity chamber (temperature 26℃, humidity 60%). Weigh the gel mass change with an analytical balance every 7 days and continuously monitor for 12 weeks. At the same time, set up an air circulation device (wind speed 0.5m / s) 10cm above the culture dish to simulate the indoor air flow environment. The formula is: Volatility rate (g / week) = (initial mass - residual mass) / number of monitoring weeks.

[0033] Table 3 is the volatilization rate detection index

[0034]

[0035] As shown in Table 3, the volatilization rates of test groups A, B, and C were stable at 1.5 g / week, 1.0 g / week, and 1.8 g / week, respectively, indicating that the volatilization rate can be precisely controlled by adjusting the S-methoprene content and the gel matrix ratio. Test group C had the fastest volatilization rate due to its higher S-methoprene content, while test group B had the slowest volatilization rate due to its lower active ingredient content. This confirms that the solvent system of ethanol and propylene glycol can regulate the volatilization rate and prevent rapid precipitation of the active ingredient, while the matrix of agar and carrageenan can support different concentrations of the active ingredient, achieving sustained and stable release.

[0036] Effect of drug duration: within 20m 2 In a sealed test chamber (temperature 26℃, humidity 60%), gel samples of the test group and the control group were placed and tested at a rate of 10m 2 Place 1 piece (20g) at a density of 1; release 10 V-stage German cockroach adults into the cabin every week for 12 weeks, and count the mortality and deformity rates of the test insects 25 days after each release, and record the time point when the efficacy of each agent first shows a significant decline (corrected mortality rate <70%). Among them, the long-term effect period is the number of weeks from application of the agent to the first time the corrected mortality rate is <70%.

[0037] Table 4 is the volatilization rate detection index

[0038]

[0039] As shown in Table 4, the long-term effects of test groups A, B, and C all reached 12 weeks, which was superior to the control group (the longest being 11 weeks). Among them, the corrected mortality rate of test group C still reached 88% after 12 weeks, indicating that the combination of high-concentration S-methoprene and an optimized gel matrix can prolong the duration of efficacy. The long-term effects of control groups A (cockroach sticky paper) and B (poison bait) were only 4-6 weeks, with rapid attenuation of efficacy due to physical trapping or degradation of the agent. The long-term effects of control groups C (aerosol) and D (cypermethrin gel) were also shorter due to chemical resistance or poor matrix stability. This demonstrates that the present invention, through the synergistic effect of S-methoprene and the gel matrix, can achieve long-term cockroach control for 10-12 weeks, resolving the problem of short duration of efficacy of traditional methods.

[0040] In summary, the corrected mortality rate of cockroach-killing solid gels with different formulas reached 81%-95%. Among them, the test group C with a high concentration of active ingredients not only had the highest corrected mortality rate, but also caused 10% of cockroach offspring to become deformed, inhibiting the population reproduction from the source; the volatilization rate can be precisely controlled at 1.0-1.8g / week through the proportion of ingredients, ensuring the continuous and stable release of active ingredients; the long-term efficacy lasts up to 12 weeks, which is superior to traditional physical killing, chemical poison bait and other methods, and avoids environmental pollution and the risk of accidental ingestion, providing a safe, efficient and convenient solution for indoor cockroach control.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A volatile cockroach-killing solid gel containing S-methoprene, characterized in that: The method comprises S-methoprene, agar, carrageenan, glycerin, ethanol, propylene glycol, sodium benzoate, an emulsifier and deionized water, and further comprises the following steps of preparing the cockroach-killing solid gel: S1. Add ethanol and propylene glycol to a reaction vessel and mix them to form a mixed solvent. Then, add S-methoprene to the mixed solvent, gently heat at ≤40°C to assist dissolution, and continue stirring until the solution is transparent and clear. Then, add an emulsifier to the solution and continue stirring to form a stable emulsion. S2. After adding deionized water to a beaker, add agar and carrageenan in sequence and stir with a stirrer until the colloids are completely dissolved to form a gel matrix solution; then, add glycerol and sodium benzoate and stir with a stirrer to allow the two to work synergistically to form a stable three-dimensional network structure; S3. Pour the S-methoprene emulsion into the gel base liquid and stir with a blender to evenly mix the active ingredient and the gel base. Then, pour the mixture into a mold to shape it to reduce the shrinkage of the gel and cracks, thereby forming a solid gel. S4. After the shaped gel is demoulded and placed in a ventilated environment for 12-14 hours, the gel is placed in a volatilization box with air holes. The air holes are used to control the contact area between the gel and the air, so that the S-methoprene in the solid gel can be volatilized.

2. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: The S-methoprene accounts for 15%-35% of the total weight of the formula; the agar accounts for 8%-15% of the total weight of the formula. Agar can form a three-dimensional network structure after cooling after heating and dissolving, supporting a high concentration of active ingredients; the carrageenan accounts for 2%-5% of the total weight of the formula. K-type carrageenan is used and can be compounded with agar to make the gel structure more stable; the glycerin accounts for 10%-12% of the total weight of the formula; the ethanol accounts for 4%-5% of the total weight of the formula; the propylene glycol accounts for 4%-5% of the total weight of the formula and can be used in conjunction with ethanol as a solvent to improve the solubility of S-methoprene; the sodium benzoate accounts for 1% of the total weight of the formula; the emulsifier accounts for 2% of the total weight of the formula. Tween-80 is used to help S-methoprene be evenly dispersed in the solvent to prevent the active ingredients from precipitating; and the deionized water accounts for the balance of the total weight of the formula.

3. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: In the S1, ethanol and propylene glycol are mixed in a ratio of 1:1 and stirred; the solution after the emulsifier is added is stirred in the reaction container at a speed of 200-300 r / min for 10-15 minutes.

4. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: In the above-mentioned S2, before adding agar and carrageenan, the temperature of the deionized water is heated to 80° C., and the stirrer is continuously stirred at a speed of 150-200 r / min for 10-15 minutes.

5. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: In the step S2, before adding glycerol and sodium benzoate, the gel matrix solution is naturally cooled to 50°C and stirred at a speed of 150-200 r / min for 5-8 minutes.

6. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: In the step S3, before adding the S-methoprene emulsion, the temperature of the gel base liquid is lowered to below 45° C., and the agitator is rapidly stirred at a speed of 300-400 r / min for 3-5 minutes.

7. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: In the S3, the mold is a silicone mold or a plastic mold.

8. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: In the above-mentioned S3, the shaping is performed by placing the mixture at room temperature for 2 hours or by refrigerating the mixture at 4° C. for 30-35 minutes.

9. The volatile cockroach-killing solid gel containing S-methoprene according to claim 1, characterized in that: The volatilization box includes a square box (B), a bracket (E) is provided below the square box (B), a tray (A) is placed inside the square box (B), and the tray (A) is used to place solid gel. The square box (B) has a small door (C) at any lower corner of one side, and an insect hole (F) is also provided above the side. The other side of the square box (B) is a large door (D).

10. The volatile cockroach-killing solid gel containing S-methoprene according to claim 9, characterized in that: The square box (B) is made of glass, and the length, width and height of the inner diameter of the square box (B) are all 1000 mm; the width and height of the small door (C) are both 100 mm; and the diameter of the insect hole (F) is 50 mm.

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