Insect repellent as well as preparation method and application thereof
The insect repellent prepared by compounding multiple plant-derived active ingredients solves the problems of environmental pollution and pest resistance caused by chemical pesticides. It provides a broad-spectrum, highly effective, and non-toxic insect repellent suitable for the control of a variety of pests and pathogens, and is applicable to large-scale agricultural production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 吕国荣
- Filing Date
- 2026-01-28
- Publication Date
- 2026-05-12
AI Technical Summary
Existing chemical pesticides pollute the environment, harm human health, and pests easily develop resistance. Furthermore, existing plant-based insect repellent products have limited coverage and unstable effectiveness.
It is formulated with a variety of plant-derived active ingredients, including citral, camellia oil, lemongrass essential oil, cinnamaldehyde and GL-35, to make an insect repellent liquid. With the addition of environmentally friendly adjuvants, it forms a broad-spectrum, highly effective, non-toxic and residue-free insect repellent liquid, which also has antibacterial and disease-fighting effects.
It achieves broad-spectrum insecticidal effects, controls a variety of crop pests, eliminates pathogens, reduces the risk of pesticide resistance, is environmentally friendly, and is suitable for large-scale agricultural production.
Smart Images
Figure CN122004257A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of biopesticide technology, and in particular to an insect repellent liquid, its preparation method, and its application. Background Technology
[0002] In agricultural production, pest infestation is a significant factor affecting crop yield and quality. Currently, most insect repellent products on the market are chemically synthesized pesticides. While these pesticides can kill and repel insects to some extent, long-term use leads to several drawbacks: First, pests easily develop resistance, causing the pesticide's effectiveness to gradually decline, requiring increasingly higher dosages or changes in pesticide types, further exacerbating environmental pollution. Second, chemical pesticides have a certain degree of toxicity, and their residues accumulate on crop surfaces and in the soil, entering the human body through the food chain and harming human health. Third, the use of chemical pesticides disrupts the ecological balance, killing pests while also harming beneficial organisms, affecting the stability of the farmland ecosystem.
[0003] To address the aforementioned issues, biopesticides derived from plants have gradually become a research hotspot in the pesticide field due to their advantages such as broad spectrum, high efficiency, non-toxicity, no residue, and low likelihood of inducing resistance. Plant-derived pesticides are made from active ingredients extracted from the roots, stems, leaves, flowers, and fruits of plants. These active ingredients are mostly natural compounds, making them environmentally friendly and relatively safe for humans and beneficial organisms.
[0004] Currently, existing plant-based insect repellent products suffer from problems such as single ingredients, limited insecticidal range, and unstable insecticidal effects, making it difficult to meet the integrated pest management needs of agricultural production. For example, some plant-based insect repellents are only effective against a few specific pests, and their control effect on many common pests such as caterpillars, stem borers, fruit flies, and aphids is poor. Furthermore, some products suffer from problems such as unreasonable ingredient ratios and complex preparation processes, resulting in poor product stability and short-lasting efficacy. Therefore, this invention proposes a plant-based insect repellent with good synergistic effects, a broad insecticidal range, stable efficacy, and simple preparation. Summary of the Invention
[0005] To address the problems of existing chemical pesticides, such as environmental pollution, harm to human health, easy development of pesticide resistance in pests, and limited range and unstable efficacy of existing plant-based insect repellents, this invention provides an insect repellent liquid, its preparation method, and its application. This insect repellent liquid is a compound of multiple plant-derived active ingredients, supplemented with environmentally friendly adjuvants. It features broad-spectrum, high efficiency, non-toxicity, no pesticide resistance, no residue, and organic environmental friendliness. It can effectively control various crop pests, while also possessing antibacterial and disease-resistant effects. Furthermore, the preparation method is simple and cost-controllable, making it suitable for large-scale agricultural production applications.
[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:
[0007] An insect repellent liquid comprises the following ingredients in weight percentage: 5.0% citral, 10.0% camellia oil, 8.0% lemongrass essential oil, 12.0% cinnamaldehyde, 15.0% GL-35, and 52.0% water.
[0008] Furthermore, the citral purity is ≥98%, the camellia oil is cold-pressed first-grade camellia oil, the lemongrass essential oil has an active ingredient content of ≥95%, the cinnamaldehyde purity is ≥99%, the GL-35 is a food-grade nonionic surfactant, and the water is deionized water or purified water.
[0009] A method for preparing an insect repellent liquid includes the following steps:
[0010] (1) Raw material pretreatment: The purity of citral, camellia oil, lemongrass essential oil and cinnamaldehyde were tested respectively; GL-35 was placed in a dry and ventilated environment for later use; the water was filtered and disinfected.
[0011] (2) Mixing and stirring: According to the weight percentage, add citral, camellia oil, lemongrass essential oil and cinnamaldehyde to the mixing container in sequence, and stir at 300-500 r / min for 15-20 minutes to obtain a mixed oil phase;
[0012] (3) Emulsification and dispersion: Under continuous stirring, GL-35 is slowly added to the mixed oil phase and stirred at 300-500 r / min for 10-15 minutes to form an emulsion;
[0013] (4) Add water for dilution: While stirring, slowly add the pretreated water to the emulsion at a speed of 50-100 ml / min. After adding water, increase the speed to 600-800 r / min and continue stirring for 20-30 minutes to form a uniform aqueous solution.
[0014] (5) Filtration and filling: The above aqueous solution is filtered through a 0.22-0.45μm precision filter to obtain the finished product and then filled.
[0015] Furthermore, the stirring processes in steps 2, 3, and 4 are all carried out under normal temperature and pressure conditions.
[0016] An application of an insect repellent liquid, wherein the insect repellent liquid is a biological plant-derived pesticide used to control caterpillars, stem borers, fruit flies, aphids, lice, spider mites, scale insect larvae, thrips, and tea green leafhoppers, and also has antibacterial and disease-resistant effects.
[0017] Furthermore, the insect repellent solution is to be diluted 60-100 times with water before spraying. The dilution concentration can be adjusted according to different crops, different growth stages, and different application methods.
[0018] Furthermore, the insect repellent solution should not be mixed with alkaline fertilizers or pesticides; shake well before use if separation occurs; it is recommended to spray on sunny evenings or according to the pest's activity patterns, avoiding high temperatures and rain / dew; ensure atomization during spraying so that the solution comes into contact with the insects; store in a cool, ventilated, and dark environment.
[0019] The beneficial effects of this invention are as follows:
[0020] Wide-ranging and highly effective insect repellent: This invention uses a compound of four plant-derived active ingredients—citral, camellia oil, lemongrass essential oil, and cinnamaldehyde—which have a synergistic effect, effectively controlling a variety of crop pests such as caterpillars, stem borers, fruit flies, aphids, lice, spider mites, scale insect larvae, thrips, and tea green leafhoppers, with a control efficiency of over 90%. It also has antibacterial and disease-resistant properties, reducing the occurrence of crop diseases and further improving crop yield and quality.
[0021] Non-toxic, residue-free, environmentally friendly and safe: The insect repellent liquid of this invention is made from natural plant extracts or environmentally friendly additives, and does not contain harmful ingredients such as organophosphates and heavy metals. It is safe for humans, livestock, and beneficial organisms such as bees and ladybugs. After use, it leaves no residue on the surface of crops and in the soil, and will not cause environmental pollution, which meets the requirements of organic agricultural production.
[0022] Less likely to develop drug resistance: The insect repellent liquid of this invention achieves its insect repellent effect through the synergistic effect of multiple active ingredients. With diverse mechanisms of action, it can effectively reduce the probability of pests developing drug resistance compared with single-ingredient insect repellent products, and can be used continuously for a long time.
[0023] The preparation method is simple and the cost is controllable: the insect repellent liquid preparation process of the present invention does not require complicated equipment and harsh reaction conditions, and can be completed at room temperature and pressure. It is easy to operate and easy to scale up production. The raw materials are widely available and the cost is relatively low, which has high economic benefits and market competitiveness. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a flowchart illustrating the preparation process of the insect repellent solution of this invention.
[0026] Figure 2 This is a flowchart illustrating the use of the insect repellent solution of this invention. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0028] An insect repellent liquid, characterized in that it is compounded from the following raw materials in weight percentage: 5.0% citral, 10.0% camellia oil, 8.0% lemongrass essential oil, 12.0% cinnamaldehyde, 15.0% GL-35, and 52.0% water.
[0029] Citral is naturally extracted citral with a purity of ≥98%; camellia oil is cold-pressed first-grade camellia oil, free of impurities and odors; lemongrass essential oil is distilled natural lemongrass essential oil with an active ingredient content of ≥95%; cinnamaldehyde is extracted from natural cinnamon with a purity of ≥99%; GL-35 is a food-grade nonionic surfactant with good emulsifying and dispersing properties; water is deionized water or purified water to ensure the absence of heavy metal ions and other harmful impurities.
[0030] The present invention also provides a method for preparing the above-mentioned insect repellent solution, comprising the following steps:
[0031] Raw material pretreatment: The purity of citral, camellia oil, lemongrass essential oil and cinnamaldehyde were tested to ensure that they met the preset standards; GL-35 was placed in a dry and ventilated environment for later use; the water was filtered and disinfected to remove impurities and harmful microorganisms.
[0032] Mixing and stirring: According to the weight percentage, first add citral, camellia oil, lemongrass essential oil and cinnamaldehyde into the mixing container in sequence, turn on the stirring device and stir at a speed of 300-500r / min for 15-20 minutes to fully mix the four plant-derived active ingredients to obtain a mixed oil phase.
[0033] Emulsification and dispersion: While continuously stirring, slowly add GL-35 to the above mixed oil phase, and continue stirring at a speed of 300-500 r / min for 10-15 minutes to fully integrate GL-35 with the mixed oil phase and form an emulsion.
[0034] Diluting with water: Keep the stirring device running and slowly add the pretreated water to the emulsion, controlling the water addition rate to 50-100 ml / min. After the water addition is complete, increase the stirring speed to 600-800 r / min and continue stirring for 20-30 minutes to fully disperse and emulsify the components and form a uniform aqueous solution.
[0035] Filtration and filling: The above uniform aqueous solution is filtered through a precision filter with a filtration accuracy of 0.22-0.45μm to ensure the purity and stability of the finished product, remove any possible small amounts of impurities and incompletely emulsified particles, and obtain the insect repellent liquid product; then it is filled as needed to produce products of different specifications.
[0036] The present invention also provides the application of the above-mentioned insect repellent, which is a biological plant-derived pesticide (cinnamaldehyde insect repellent preparation), mainly used to control crop pests such as caterpillars, stem borers, fruit flies, aphids, lice, spider mites, scale insect larvae, thrips, and tea green leafhoppers, while also having antibacterial and disease-resistant effects.
[0037] The dosage and usage of the insect repellent are as follows: For regular use, dilute the insect repellent with water 60-100 times before spraying; the dilution concentration can be adjusted appropriately according to different crops, different growth stages and different application methods.
[0038] Precautions for using insect repellent include:
[0039] This product should not be mixed with alkaline fertilizers or pesticides, as this may affect its efficacy.
[0040] If the product separates into layers, simply shake well before use; this will not affect the efficacy.
[0041] It is recommended to spray on a sunny evening, or according to the pest's activity patterns, and avoid spraying in hot or rainy weather.
[0042] This product is a physical contact pesticide. When spraying, try to ensure atomization so that the pesticide can fully contact the insect body.
[0043] The insect repellent solution should be stored in a cool, ventilated, and dark environment, away from fire and heat sources, and should not be stored with food or beverages.
[0044] Example 1: Preparation of an insect repellent solution
[0045] The insect repellent solution in this embodiment is composed of the following ingredients by weight percentage: citral 5.0%, camellia oil 5.0%, lemongrass essential oil 12.0%, cinnamaldehyde 12.0%, GL-35 15.0%, and water 52.0%. The total volume of this trial production is 1000ml. The specific dosage, price, and cost of each ingredient are shown in the table below:
[0046] Table 1 Raw Material Data
[0047]
[0048] The preparation method includes the following steps:
[0049] Raw material pretreatment: The purity of citral was tested to be 98.5%, the camellia oil was cold-pressed grade 1, the active ingredient content of lemongrass essential oil was 96%, and the purity of cinnamaldehyde was 99.2%, all of which met the preset standards; GL-35 was placed in a dry and ventilated place for later use; the water was treated through a quartz sand filter and an ultraviolet sterilizer to obtain deionized water.
[0050] Mixing and stirring: Add 0.05 kg citral, 0.05 kg camellia oil, 0.12 kg lemongrass essential oil and 0.12 kg cinnamaldehyde to a stainless steel mixing container in sequence, turn on the stirring device and stir at 400 r / min for 18 minutes to obtain a mixed oil phase.
[0051] Emulsification and dispersion: While continuously stirring, slowly add 0.15 kg GL-35 to the mixed oil phase and continue stirring at 400 r / min for 12 minutes to form a uniform emulsion.
[0052] Diluting with water: Keep the stirring device running and slowly add 0.52 kg of pretreated deionized water to the emulsion at a rate of 80 ml / min. After the water is added, increase the stirring speed to 700 r / min and continue stirring for 25 minutes to obtain a uniform aqueous solution.
[0053] Filtration and Filling: The above aqueous solution is filtered through a 0.3μm precision filter to remove a small amount of impurities, yielding the finished insect repellent solution. It is then filled into 250ml and 1000ml sizes. Four 250ml bottles can be filled, one 1000ml bottle can be filled, and 0.2 bottles can be filled into a 5000ml solution (i.e., 2.5 parts of 1000ml finished product are needed for every 5000ml). The raw material unit price for each size is shown in the table below.
[0054] Table 2 Unit Price Data
[0055]
[0056] Example 2: Test of the insect repellent effect of the insect repellent solution
[0057] Three common crops—tomato, cucumber, and tea—were selected and divided into experimental and control groups. Each group had a planting area of 100 square meters and the planting conditions were identical. The experimental group used the insect repellent solution prepared in Example 1 of this invention, diluted 80 times with water according to conventional usage, and sprayed during the peak pest season (peak season for tomato caterpillars, cucumber aphids, and tea green leafhoppers) once every 7 days for 3 consecutive applications. The control group used a commercially available synthetic chemical insect repellent pesticide, sprayed according to its instructions. The blank control group was not sprayed with any insect repellent product.
[0058] Fifteen days after spraying, the number and severity of pests on each group of crops were counted, and the pest control rate was calculated. The test results are shown in the table below:
[0059] Table 3 Test Results
[0060]
[0061] The test results above show that the insect repellent of the present invention has a repellency rate of over 90% against pests such as tomato caterpillars, cucumber aphids, and tea green leafhoppers, which is comparable to the insect repellency effect of commercially available chemically synthesized insect repellents. Furthermore, the damage to crops in the experimental group was significantly lower than that in the blank control group, and no phytotoxicity or pesticide residues were detected in the crops in the experimental group throughout the entire test. In addition, a statistical analysis of beneficial organisms in the sprayed area of the experimental group revealed no significant change in the number of beneficial organisms such as bees and ladybugs compared to the blank control group, indicating that the insect repellent of the present invention is safe for beneficial organisms.
[0062] Example 3: Test on the antibacterial and antiviral effects of insect repellent solution
[0063] Two crops, wheat and cabbage, were selected and set up as experimental and blank control groups, with each group having a planting area of 100㎡ and the same planting conditions. The experimental group used the insect repellent prepared in Example 1 of this invention, diluted 80 times with water according to conventional usage, and sprayed once each during the seedling stage and the growth stage of the crops; the blank control group was not sprayed with any insect repellent or fungicide products.
[0064] After the growth cycle was completed, the incidence of diseases in each group of crops was statistically analyzed, and the disease prevention rate was calculated. The test results are shown in the table below:
[0065] Table 4 Test Results
[0066]
[0067] The test results above show that the insect repellent of the present invention has a good control effect on crop diseases such as wheat powdery mildew and cabbage soft rot, with a disease prevention rate of over 85%. This indicates that it has both antibacterial and anti-disease effects, which can effectively reduce the occurrence of crop diseases and further ensure the yield and quality of crops.
[0068] In summary, the insect repellent of this invention is a biological plant-derived pesticide with broad-spectrum, high-efficiency, non-toxic, non-resistant, residue-free, organic and environmentally friendly characteristics. It can effectively control various crop pests such as caterpillars, stem borers, fruit flies, and aphids, while also having antibacterial and disease-resistant effects. It is suitable for large-scale agricultural production and has significant economic and ecological benefits.
[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An insect repellent liquid, characterized in that, The product is a blend of the following ingredients in weight percentage: citral 5.0%, camellia oil 10.0%, lemongrass essential oil 8.0%, cinnamaldehyde 12.0%, GL-35 15.0%, and water 52.0%.
2. The insect repellent liquid according to claim 1, characterized in that, The citral purity is ≥98%, the camellia oil is cold-pressed first-grade camellia oil, the lemongrass essential oil has an active ingredient content of ≥95%, the cinnamaldehyde purity is ≥99%, the GL-35 is a food-grade nonionic surfactant, and the water is deionized water or purified water.
3. A method for preparing the insect repellent liquid as described in claim 1 or 2, characterized in that, Includes the following steps: (1) Raw material pretreatment: The purity of citral, camellia oil, lemongrass essential oil and cinnamaldehyde were tested respectively; GL-35 was placed in a dry and ventilated environment for later use; the water was filtered and disinfected. (2) Mixing and stirring: According to the weight percentage, add citral, camellia oil, lemongrass essential oil and cinnamaldehyde to the mixing container in sequence, and stir at 300-500 r / min for 15-20 minutes to obtain a mixed oil phase; (3) Emulsification and dispersion: Under continuous stirring, GL-35 is slowly added to the mixed oil phase and stirred at 300-500 r / min for 10-15 minutes to form an emulsion; (4) Add water for dilution: While stirring, slowly add the pretreated water to the emulsion at a speed of 50-100 ml / min. After adding water, increase the speed to 600-800 r / min and continue stirring for 20-30 minutes to form a uniform aqueous solution. (5) Filtration and filling: The above aqueous solution is filtered through a 0.22-0.45μm precision filter to obtain the finished product and then filled.
4. The preparation method according to claim 3, characterized in that, The stirring processes in steps 2, 3, and 4 were all carried out under normal temperature and pressure conditions.
5. An application of the insect repellent liquid as described in claim 1 or 2, characterized in that, The insect repellent is a biological plant-derived pesticide used to control caterpillars, stem borers, fruit flies, aphids, lice, spider mites, scale insect larvae, thrips, and tea green leafhoppers, and also has antibacterial and disease-resistant effects.
6. The application according to claim 5, characterized in that, The insect repellent solution is to be diluted 60-100 times with water before spraying. The dilution concentration can be adjusted according to different crops, different growth stages, and different application methods.
7. The application according to claim 5, characterized in that, The insect repellent solution should not be mixed with alkaline fertilizers or pesticides; shake well before use if separation occurs; it is recommended to spray on sunny evenings or according to the pest's activity patterns, avoiding high temperatures and rain / dew; ensure atomization during spraying so that the solution comes into contact with the insects; store in a cool, ventilated, and dark environment.