Spreading oil sanitary insecticide for spawning female mosquitoes and water breeding environment larvae and preparation method of spreading oil sanitary insecticide

Abstract

The invention discloses a spreading oil sanitary insecticide for spawning female mosquitoes and water breeding environment larvae, which is composed of 5-20% by mass of polydimethylsiloxane, 5-20% by mass of surfactant, 5-20% by mass of film-forming agent, 5-20% by mass of film stabilizer and the balance of edible oil, and the spreading oil sanitary insecticide comprises the following components in percentage by mass: 5-20% by mass of surfactant, 5-20% by mass of film-forming agent, 5-20% by mass of film stabilizer and the balance of edible oil. The mass percentage concentration of the surfactant is 2%-15%, the mass percentage concentration of the film-forming agent and the film stabilizer is 10%-40%, and the balance is edible oil substances. The invention also provides a preparation method of the spreading oil agent. After being dripped on the water surface, the mosquito killer disclosed by the invention can quickly diffuse, float and spread on the water surface to form a layer of oil film without medicine components, and after mosquito larvae are in contact with the oil film on the water surface during breathing, the mosquito larvae at all stages can be quickly killed, spawning female mosquitoes can also be actively killed, and hatching of newly-laid mosquito eggs can also be prevented for a long time.

Description

Technical Field

[0001] This invention belongs to the field of biology and relates to an insecticide, specifically a film-spreading oil-based sanitary insecticide for oviposition female mosquitoes and larvae in aquatic breeding environments, and its preparation method. It is a novel, environmentally friendly formulation technology for the control of adult mosquitoes and larvae without drug components. Background Technology

[0002] Environmental remediation and the introduction of insecticides to mosquito breeding grounds to block breeding routes and kill egg-laying female mosquitoes are effective means of reducing mosquito density.

[0003] Existing technologies have the following shortcomings: Currently used sanitary insecticides, applied by spraying pesticides to control adult mosquitoes in designated spaces, are passive methods of control because the mosquitoes are stimulated and escape, thus only reducing mosquito density. Sanitary pesticides for mosquito larvae control are primarily highly toxic organophosphates (or chlorine), mainly in granular form. Their advantages include convenient application and some slow-release effect, but require large dosages (e.g., 30g / m² of thiophanate-methyl). 2 Furthermore, it is ineffective against adult mosquitoes that lay eggs, and the drug is diluted during the rainy season, affecting its efficacy in water bodies where larvae breed and causing significant environmental pollution. Mosquitoes are also prone to developing drug resistance. Summary of the Invention

[0004] The purpose of this invention is to provide a film-spreading oil-based sanitary insecticide for oviparous female mosquitoes and larvae in aquatic breeding environments, and its preparation method. This film-spreading oil-based sanitary insecticide and its preparation method aim to solve the technical problems of poor efficacy, environmental pollution, and drug resistance in existing technologies for controlling adult mosquitoes and larvae at various stages.

[0005] This invention provides a film-spreading oil-based sanitary insecticide for oviposition female mosquitoes and larvae in aquatic breeding environments. It comprises polydimethylsiloxane, a surfactant, a film-forming agent and a film stabilizer, and edible oil. In the film-spreading oil, the polydimethylsiloxane has a mass percentage concentration of 5%–20%, the surfactant has a mass percentage concentration of 2%–15%, the film-forming agent and film stabilizer have a mass percentage concentration of 10%–40%, and the edible oil is the remainder.

[0006] Furthermore, in the film-spreading oil, the mass percentage concentration of polydimethylsiloxane is 12%, the mass percentage concentration of the surfactant is 5.5%, the mass percentage concentration of the film-forming agent and film stabilizer is 28.5%, and the edible oil substance is the balance.

[0007] Furthermore, the edible oil is soybean oil.

[0008] Furthermore, the surfactant is a mixture of emulsifier OP-4 and emulsifier OP-10, wherein the weight ratio of emulsifier OP-4 to emulsifier OP-10 is 1-10:0.5-5.

[0009] Furthermore, in the mixture of film-forming agent and film stabilizer, the mass ratio of film-forming agent to film stabilizer is 6:(5~15).

[0010] Furthermore, the film-forming agent is a dodecyl alcohol ester, and in the film-spreading oil, the mass percentage concentration of the dodecyl alcohol ester is 1-15%.

[0011] Furthermore, the film stabilizer is a mixture of diesel oil, turpentine, and methyl laurate, wherein the weight ratio of diesel oil, turpentine, and methyl laurate is 2-13:2-12:5-20.

[0012] The present invention also provides the above-mentioned film-spreading oil-based sanitary insecticide for oviposition female mosquitoes and larvae in aquatic breeding environments, comprising the following steps: Weigh out polydimethylsiloxane, surfactant, film-forming agent and film stabilizer, and edible oil according to their mass percentage concentrations; Then, in a reaction vessel, polydimethylsiloxane, film-forming agent and film stabilizer and edible oil are added in sequence under stirring, and stirred until well mixed. Finally, add the surfactant, stir and mix well, take a sample for analysis, and proceed to the packaging process after passing the test.

[0013] This invention provides a polydimethylsiloxane spreading oil formulation that actively kills egg-laying female mosquitoes and larvae in aquatic breeding environments. Polydimethylsiloxane is almost insoluble in water at room temperature but soluble in many organic solvents, and is stable to light and air. It is safe for humans and animals, non-toxic, and is a raw material in cosmetics, providing a soft feel. It can also be used in sunscreens for its water-retaining properties. When this spreading oil is applied to the water surface, it floats and spreads rapidly. Mosquito larvae, pupae, and other stages periodically float to the surface to breathe. When a layer of this oil film spreads on the water surface, the larvae come into contact with the oil film, causing their respiratory tracts to become blocked, leading to suffocation and death. When adult mosquitoes lay eggs on the water surface, the spreading oil reduces the surface tension, causing the adult mosquitoes to sink to the surface and drown. It can also prevent the hatching of new larvae for a relatively long time. When placed in rainwater wells, it can quickly extend a long distance in case of rain. The water surface in basement sump wells usually remains still, and the inflow and outflow of water do not affect the stability of the water surface. This invention can be applied to small water-collecting containers, rainwater wells, sump wells, and even paddy fields, ditches, ponds, and swamps at a dosage of 1 ml / m³. 2 It can rapidly and significantly reduce costs, improve work efficiency, and save a lot of social resources. All formula ingredients are biodegradable and do not pollute the environment.

[0014] This invention discloses a novel formulation and method for mosquito control containing polydimethylsiloxane spreading oil, which targets the mosquito's egg-laying and breeding environment to kill female mosquitoes and larvae. The spreading oil remains effective for about 15 days after application, and the mortality rate of mosquito larvae at all stages is 100%. It is an environmentally friendly new formulation technology for the control of adult mosquitoes and larvae without any drug components.

[0015] Basis for selecting main raw materials: Polydimethylsiloxane has moderate adhesiveness and good ductility, which can easily block the respiratory tubes of mosquito larvae, causing them to suffocate.

[0016] Diesel fuel has a synergistic effect, and it, along with turpentine, has an auxiliary effect on the stability of the film.

[0017] Soybean oil is an environmentally friendly solvent.

[0018] Methyl lauryl is the most widely used solvent in film spreading agents and can increase film stability.

[0019] Dodecyl alcohol esters are film-forming agents, and are the most widely used film-forming agents among film-spreading agents.

[0020] OP4 and OP10 are well-established agricultural surfactants. Their components are: OP4 is octylphenol polyoxyethylene (n=4) ether, and OP10 is octylphenol polyoxyethylene (n=10) ether. They can reduce the surface tension of water.

[0021] Compared with existing technologies, the present invention represents a significant technological advancement.

[0022] 1. The polydimethylsiloxane screened in this invention is non-toxic to humans and animals for external use, with a dosage of 10 ml / m². 3 It is safe for fish (see fish toxicity test), contains no pesticides, is very environmentally friendly, and the selected surfactants are all eco-friendly. When this formulation is dripped into water, it spreads rapidly and forms a film on the surface of water bodies where mosquitoes breed.

[0023] 2. This invention targets mosquito breeding grounds and the oviposition habits of female mosquitoes. The drug film spreads naturally and evenly on the water surface. When mosquito larvae at various stages float to the surface and come into contact with the oil film, the polydimethylsiloxane blocks their respiratory tubes, causing them to suffocate and die. When female mosquitoes lay eggs on the water surface, the oil film reduces the surface tension of the water, causing the female mosquitoes to become trapped in the film and drown. This can actively reduce the density of female mosquitoes and quickly control dengue fever and malaria pathogens.

[0024] 3. After application, this mosquito-controlling oil quickly spreads across the water surface, forming a film that adheres to various aquatic plants or floating objects, creating mutual tension. When it rains or water is used, the water flows away from under the film. Therefore, for approximately 15 days after application, regardless of whether it is sunny or rainy, the mosquito control effect is not affected. Thus, this invention can quickly kill larvae and actively kill egg-laying female mosquitoes, and new eggs produced during this period cannot hatch.

[0025] 4. This invention is particularly suitable for rapid emergency response to outbreaks of mosquito-borne infectious diseases such as dengue fever and malaria. The dosage is 1 ml / m² based on the mosquito breeding water area. 2 The calculation shows that the open water automatically diffuses from upstream to downstream to form a film, which is simple and convenient, and improves the work efficiency of mosquito control teams.

[0026] 5. Drainage channels such as rainwater wells, sump wells, septic tanks, and sewage wells are usually difficult points for mosquito control. After the product of this invention is placed, it can spread rapidly and extend a long distance. The water surface of the basement sump well usually remains still, and the inflow and outflow of water do not affect the stability of the water surface. Placing this invention in the sump well can significantly reduce the amount of drug used per unit area, save a lot of social resources, and reduce environmental pollution.

[0027] 6. This product contains no pesticide ingredients. Its main ingredients are the raw materials commonly used in cosmetics, which are low in toxicity or non-toxic to mammals, birds, fish and bees, making it very safe and environmentally friendly. The raw materials used are all environmentally friendly, which has a more positive significance for protecting ecological health. Attached Figure Description

[0028] Figure 1 The KT50 of the environmentally friendly polydimethylsiloxane spreading oil and deltamethrin spreading oil groups in killing Culex pipiens mosquito larvae are shown. A is the environmentally friendly polydimethylsiloxane spreading oil group (Example 1), and B is the 0.5% deltamethrin spreading oil group.

[0029] Figure 2 The study shows the 12-hour mortality rate of Culex mosquito larvae killed by the environmentally friendly polydimethylsiloxane spreading oil and deltamethrin spreading oil groups. A represents the environmentally friendly polydimethylsiloxane spreading oil group (Example 1), and B represents the 0.5% deltamethrin spreading oil group.

[0030] Figure 3 The results show the effect of the environmentally friendly polydimethylsiloxane spreading oil (Example 1) in a sewage well.

[0031] Figure 4This paper shows the mosquito larvae density monitoring results of an environmentally friendly polydimethylsiloxane spreading oil (Example 1) in a demonstration application in Luohu District, Shenzhen. A represents the environmentally friendly polydimethylsiloxane spreading oil group (Example 1), B represents the 0.5% deltamethrin spreading oil group 2.0, C represents the 0.5% deltamethrin spreading oil group 1.0, D represents the blank control group, and E represents the fenthion group.

[0032] Figure 5 This paper shows the pupal density monitoring results of an environmentally friendly polydimethylsiloxane spreading oil (Example 1) in a demonstration application in Luohu District, Shenzhen. A represents the environmentally friendly polydimethylsiloxane spreading oil group (Example 1) (referred to as spreading oil A), B represents the 0.5% deltamethrin spreading oil 2.0 group (referred to as spreading oil B), C represents the 0.5% deltamethrin spreading oil 1.0 group (referred to as spreading oil C), D represents the blank control group, and E represents the phosmet group (referred to as phosmet group E).

[0033] Figure 6 This paper shows the adult mosquito density monitoring results of an environmentally friendly polydimethylsiloxane spreading oil (Example 1) in a demonstration application in Luohu District, Shenzhen. A represents the environmentally friendly polydimethylsiloxane spreading oil group (referred to as spreading oil A) (Example 1), B represents the 0.5% deltamethrin spreading oil 2.0 group (referred to as spreading oil B), C represents the 0.5% deltamethrin spreading oil 1.0 group (referred to as spreading oil C), D represents the blank control group, and E represents the phosmet group (referred to as phosmet group E).

[0034] Figure 7 The results of the acute toxicity evaluation test of the environmentally friendly polydimethylsiloxane spreading oil (Example 1) are shown. Detailed Implementation Example 1:

[0035] This invention provides a film-forming oil-based sanitary insecticide for oviposition female mosquitoes and larvae in aquatic breeding environments, wherein the main ingredient, polydimethylsiloxane, accounts for 12.00% (by weight percentage, the same below), surfactant accounts for 5.50%, film-forming agent and film stabilizer account for 28.50%, and the balance is edible oils accounting for 54.00% (see Table 1).

[0036]

[0037] Preparation steps for spreading oil: First, weigh each substance according to its mass percentage. While stirring, add polydimethylsiloxane, diesel oil, turpentine, soybean oil, methyl laurate, and dodecyl alcohol ester in that order. Stir for ten minutes, then add OP4 and OP10, stir for 15 minutes, take a sample for analysis, and proceed with the packaging process after passing the test.

[0038] The application method for this protective insecticide, specifically the spreading oil-based formulation used for egg-laying female mosquitoes and larvae in aquatic breeding environments, is as follows: Apply at a concentration of 1.0 ml / m³. 2 When dropped onto the water surface, it naturally diffuses to form a film with a thickness of 1.0 micrometers.

[0039] The emulsion oil formulation for controlling female mosquitoes and larvae prepared in this embodiment is characterized by high efficiency, low dosage, long-lasting effect, safety for non-target organisms, and minimal impact on the ecological environment. In malaria-endemic areas, this formulation can be applied in conjunction with rice cultivation to effectively control Anopheles mosquito breeding in water bodies while simultaneously eliminating rice pests. It has a broader insecticidal spectrum and rapid killing effect on pests. This product does not contain pesticide components; its main component is polydimethylsiloxane, commonly used in cosmetics. The selected solvent and dispersion dosage are small and biodegradable, without affecting the environmental ecology.

[0040] In this embodiment, the insecticidal effect of the spreading oil formulation product for controlling female mosquitoes and larvae was tested both indoors and outdoors. After application, at a concentration of 1.0 ml / m², the insecticidal effect was assessed. 2 When placed on the water surface, the product can quickly spread and float on the surface, and its good extensibility with the water flow forms a film. Larvae at all stages float to the surface due to lack of oxygen and passively come into contact with the film. After 24 hours, the larval mortality rate is 100%. After 72 hours, various gases (such as biogas) in septic tanks and sewage wells cannot pass through the film and form many bubbles. The average effective time is 12-15 days. The test results show that the positive rate of mosquito larvae is 0. Indoor observation shows that after laying eggs, female mosquitoes automatically come into contact with the water surface, the mortality rate is 100%, and the insecticidal effect is excellent.

[0041] The environmentally friendly polydimethylsiloxane spreading oil of this invention has an application dosage of 1 ml / m³. 2 The KT50 (time required to knock down 50% of the test insects) value (taking Culex pipiens quinquefolius larvae as an example) was 18.1 min, while the application rate of 0.5% deltamethrin spreading oil was 1 ml / m². 2 The KT50 (time required to knock down 50% of the test insects) value (taking Culex pipiens quinquefolius larvae as an example) was 9.5 min; 12 h after application, the dosage of the environmentally friendly polydimethylsiloxane spreading oil was 1 ml / m³. 2 The larval mortality rate was 98% (49 / 50), while the application rate of 0.5% deltamethrin spreading oil was 1 ml / m². 2 The larval mortality rate was 100% (50 / 50); after 24 hours, the larval mortality rate in both groups was 100%, while all larvae in the control group survived, as shown below. Figure 1-2 As shown in the image.

[0042] As shown in Table 2, the oil film carrier formulation of the environmentally friendly polydimethylsiloxane spreading oil agent of this application uses diesel oil and other oil film carrier formulation components in a synergistic effect. Compared with the experimental group without diesel oil, it increases the oil film diffusion rate and the duration of the formed dense oil film layer, thereby improving stability.

[0043]

[0044] As shown in Table 3, the application dosage of the film-spreading oil-based sanitary insecticide in this application is 1 ml / m². 2 The KT50 (time required to knock down 50% of the test insects) value (taking Culex pipiens quinquefolius larvae as an example) was 18.1 min, with a duration of action of 15 days; the dosage of 0.5% deltamethrin spreading oil was 1 ml / m². 2 The KT50 (time required to knock down 50% of the test insects) value (taking Culex pipiens quinquefolius larvae as an example) is 9.5 min, with a duration of action of 15 days; while the drug-free and polydimethylsiloxane-free spreading oil 1 ml / m 2 At the specified dosage, it still has a certain physical asphyxiation effect on the larvae of Culex pipiens quinquefolius, Aedes albopictus, and Anopheles sinensis, with an effective duration of about 3 days. Therefore, the environmentally friendly polydimethylsiloxane spreading oil-based sanitary insecticide of this application has a highly efficient physical killing effect, and its KT50 is significantly better than that of a single drug-free and non-polydimethylsiloxane spreading oil.

[0045] Example 2:

[0046] In August 2021, the environmentally friendly polydimethylsiloxane spreading oil agent of this invention (Example 1) was applied in three pilot communities in three mosquito breeding areas in Sungang, Dongxiao and Donghu subdistricts of Luohu District, Shenzhen, to observe its effect on controlling Aedes and Culex mosquito larvae. The environmentally friendly polydimethylsiloxane spreading oil agent (Example 1), a spreading oil agent containing 0.5% deltamethrin (product manufactured in May 2021, formula same as "0.5% deltamethrin spreading oil agent formula table"), a spreading oil agent containing 0.5% deltamethrin (product manufactured in May 2020, formula same as "0.5% deltamethrin spreading oil agent formula table"), and fenthion were applied in the three pilot communities, once every half month (1.0 ml / m³ for the three spreading oil agent groups). 2 The concentration of thiophanate-methyl is 30 g / m³.2 The study included a water surface and a blank control group (without the relevant drug). Larvae (wrigglers and pupae) and female mosquitoes were monitored at four time points: August 2 (day 1, before drug application), August 17, September 2, and September 30.

[0047] Analysis of the monitoring results showed that the environmentally friendly polydimethylsiloxane spreading oil, 0.5% deltamethrin spreading oil 2.0, 0.5% deltamethrin spreading oil 1.0, and fenthion group all had good killing effects on mosquito larvae and pupae, and all showed significant differences compared with the control group (P<0.001). There were no significant differences in the killing effects on mosquito larvae and pupae among the four groups (environmentally friendly polydimethylsiloxane spreading oil, 0.5% deltamethrin spreading oil 2.0, 0.5% deltamethrin spreading oil 1.0, and fenthion group). The results indicate that all four groups (environmentally friendly polydimethylsiloxane spreading oil, 0.5% deltamethrin spreading oil 2.0, 0.5% deltamethrin spreading oil 1.0, and fenthion group) have good killing effects, as shown in Tables 6-7 below. Figure 3-5 As shown in Table 8 below. Furthermore, the environmentally friendly polydimethylsiloxane spreading oils exhibited significantly different killing effects on adult mosquitoes, as shown in Table 8 below. Figure 6 As shown in the image.

[0048] A is the environmentally friendly polydimethylsiloxane spreading oil group (hereinafter referred to as spreading oil A), and the formula is shown in "Table 1 12% Organosilicon Spreading Oil Formulation Table"; B is the 0.5% deltamethrin spreading oil group 2.0 (hereinafter referred to as spreading oil B), and the formula is shown in "0.5% deltamethrin Spreading Oil Formulation Table" (product manufactured in May 2021); C is the 0.5% deltamethrin spreading oil group 1.0 (hereinafter referred to as spreading oil C), and the formula is shown in "0.5% deltamethrin Spreading Oil Formulation Table" (product manufactured in May 2020); D is the blank control group; E is the phosmet group (hereinafter referred to as phosmet group E), which is a commercially available product with a phosmet content of 5%.

[0049]

[0050] Conclusion: Based on the field experimental results, the environmentally friendly polydimethylsiloxane spreading oil has a good killing effect on Aedes and Culex mosquito larvae (wrigglers and pupae) and adult mosquitoes. Therefore, it is particularly suitable for mosquito control in areas with high prevalence of mosquito-borne infectious diseases such as dengue fever and malaria, reducing the incidence of mosquito-borne infectious diseases and the possibility of local transmission caused by imported cases, thereby protecting public health.

[0051] Example 3: The environmentally friendly polydimethylsiloxane spreading oil of this invention (Example 1) underwent an acute toxicity evaluation experiment conducted by our project team. The test animal was the medaka (Oryzias latipes), an internationally recognized medical fish that is particularly sensitive to changes in water quality and environment, and is a model aquatic organism similar to zebrafish. Acute toxicity exposure experiments were conducted for 7 days on both the environmentally friendly polydimethylsiloxane spreading oil group (Example 1) and the 0.5% deltamethrin spreading oil group (a product manufactured in May 2021). Ten fish were used in each group, with four parallel control groups. Fresh aquaculture water containing the spreading oil was prepared daily to ensure consistent concentration.

[0052] The results showed that at exposure doses of 1 μL / L and 10 μL / L, neither the environmentally friendly polydimethylsiloxane spreading oil (Example 1) nor the 0.5% deltamethrin spreading oil (a product manufactured in May 2021) caused fish mortality within 7 days. However, an exposure dose of 100 μL / L began to cause some harm to fish survival from the 3rd day onwards. Deltamethrin, as a pesticide, was particularly sensitive to fish, resulting in a higher mortality rate. The study also indicated that an exposure dose of 10 μL / L (i.e., 10 ml / m³) was effective. 3 The exposure dose is considered relatively safe, and the concentration of the environmentally friendly polydimethylsiloxane spreading oil is 1 μL / L, making it even more green and environmentally friendly, as follows: Figure 7 As shown in the image.

[0053] In summary, this invention, when applied to the water surface, rapidly diffuses and floats, forming an oil film containing polydimethylsiloxane. When mosquito larvae float on the surface to breathe, contact with this film, the active ingredient, polydimethylsiloxane, blocks their respiratory tract, causing them to suffocate. Simultaneously, this film reduces the surface tension of the water, causing adult mosquitoes laying eggs to become unstable and drown, thus preventing the hatching of new larvae for a longer period. When applied to sewage wells, rainwater wells, and septic tanks, it forms a tensile film with floating debris such as garbage. When gases such as biogas are released from the sewage, bubbles of varying sizes are visible forming on the film, which rupture and release gas only when the tension dissipates. During rainy weather, the water in wells flows under the film into the horizontal drainage pipes, having minimal impact on the chemical film. In basement sump wells, the water surface is usually still, so inflow and outflow do not affect the stability of the water surface. Applying this invention to sump wells can significantly reduce the frequency of application, saving substantial social resources.

Claims

1. A film-spreading oil-based sanitary insecticide for oviposition of female mosquitoes and larvae in aquatic breeding environments, and its preparation method, characterized in that: It is composed of polydimethylsiloxane, surfactant, film-forming agent and film stabilizer, and edible oil. In the film-spreading oil, the mass percentage concentration of polydimethylsiloxane is 5% to 20%, the mass percentage concentration of surfactant is 2% to 15%, the mass percentage concentration of film-forming agent and film stabilizer is 10% to 40%, and the edible oil is the balance.

2. The protective oil-based insecticide according to claim 1 for oviposition of female mosquitoes and larvae in aquatic breeding environments, characterized in that: In the film-spreading oil, the mass percentage concentration of polydimethylsiloxane is 12%, the mass percentage concentration of the surfactant is 5.5%, the mass percentage concentration of the film-forming agent and film stabilizer is 28.5%, and the edible oil is the balance.

3. The protective oil-based insecticide according to claim 1 for oviposition of female mosquitoes and larvae in aquatic breeding environments, characterized in that: The edible oil mentioned is soybean oil.

4. The protective oil-based insecticide according to claim 1 for oviposition of female mosquitoes and larvae in aquatic breeding environments, characterized in that: The surfactant is a mixture of emulsifier OP-4 and emulsifier OP-10, wherein the weight ratio of emulsifier OP-4 to emulsifier OP-10 is 1-10:0.5-5.

5. The protective oil-based insecticide according to claim 1 for oviposition of female mosquitoes and larvae in aquatic breeding environments, characterized in that: In the mixture of film-forming agent and film stabilizer, the mass ratio of film-forming agent to film stabilizer is 6:(5-15).

6. The protective oil-based insecticide according to claim 1 for oviposition of female mosquitoes and larvae in aquatic breeding environments, characterized in that: The film-forming agent is a dodecyl alcohol ester, and the mass percentage concentration of the dodecyl alcohol ester in the film-spreading oil is 1-15%.

7. The protective oil-based insecticide according to claim 1 for oviposition of female mosquitoes and larvae in aquatic breeding environments, characterized in that: The membrane stabilizer is a mixture of diesel oil, turpentine, and methyl laurate, wherein the weight ratio of diesel oil, turpentine, and methyl laurate is 2-13:2-12:5-20.

8. The film-spreading oil-based sanitary insecticide according to claim 1 for use against oviposition female mosquitoes and larvae in aquatic breeding environments, characterized in that... The steps include: 1) Weigh out polydimethylsiloxane, surfactant, film-forming agent and film stabilizer, and edible oil substances according to their mass percentage concentrations; 2) Then, in a reaction vessel, polydimethylsiloxane, film-forming agent and film stabilizer and edible oil are added in sequence under stirring, and stirred until well mixed; 3) Finally, add the surfactant, stir and mix well, take a sample for analysis, and proceed to the packaging process after passing the test.

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