A composition for insecticidal use, its preparation and use
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-15
- Publication Date
- 2026-08-11
AI Technical Summary
[0004]本发明的目的在于提供一种用于杀虫的组合物及其制备方法和应用，旨在解决现有植物源农药杀虫谱窄、单一组分药效偏弱，难以同时防治螨类、蚧类、蓟马类害虫的问题，同时规避化学农药易引发害虫抗药性、农药残留超标的弊端
本发明首次将印楝籽提取物、紫茎泽兰提取物与白花鬼针草提取物三元复配，白花鬼针草提取物虽单用无杀虫活性却可显著提升渗透与杀虫效果，三者协同增效，突破了传统二元复配及单一植物源农药杀虫谱窄、防效弱的局限；融合印楝籽提取物对蓟马的专属防效与紫茎泽兰提取物对红蜘蛛的靶向灭杀优势，实现螨类、蚧类、缨翅目害虫协同防治，杀虫谱广；以紫茎泽兰、白花鬼针草两种入侵植物为核心原料，变害为宝，生态经济价值突出；优化分散、湿润、增稠、抗冻等助剂体系，药效稳定性强，耐雨水冲刷；原料全为天然提取物与环保助剂，安全低毒，无残留，无药害，适合绿色及有机农产品生产；制备工艺简单，易于工业化量产，推广应用价值高。
Abstract
Description
Technical Field
[0001] This invention relates to the field of pesticide technology, and more particularly to an insecticidal composition, its preparation method, and its application. Background Technology
[0002] Spider mites and scale insects are typical and persistent pests in agricultural production. These tiny insects have a waxy protective layer on their bodies, making it difficult for conventional chemical pesticides to penetrate and exert their effects. Long-term use of chemical pesticides not only easily induces high pesticide resistance in pests but also results in pesticide residues, polluting the soil and crops, damaging the farmland ecosystem, and failing to meet the requirements for developing pollution-free agriculture. Thrips, such as rose thrips and cowpea thrips, damage young crop tissues by rasping and sucking, and can also transmit various plant viruses. In recent years, the frequency of pest outbreaks has been continuously increasing, severely reducing the yield and quality of flowers and vegetables, and even causing total crop failure in some production areas.
[0003] Currently used single pesticides generally have a narrow insecticidal spectrum and poor efficacy, failing to effectively control the aforementioned multiple types of pests. Therefore, there is an urgent need in this field for a compound pesticide product with a broad insecticidal spectrum, excellent efficacy, and green safety to meet the actual needs of modern agricultural pest control. Summary of the Invention
[0004] The purpose of this invention is to provide an insecticidal composition, its preparation method, and its application, aiming to solve the problems of narrow insecticidal spectrum, weak efficacy of single components, and difficulty in simultaneously controlling mites, scale insects, and thrips in existing plant-derived pesticides, while avoiding the drawbacks of chemical pesticides, such as pest resistance and excessive pesticide residues. This invention scientifically combines extracts from three natural plants—neem seeds, purple-stemmed eupatorium, and white-flowered beggar-ticks—with each component producing a synergistic effect, providing multiple effects of killing mites, scale insects, and thrips. The product uses readily available raw materials, has a simple preparation process, stable efficacy, and is safe for crops after application, achieving both resource utilization of invasive plants and meeting the needs of green pest control in agriculture and forestry.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: The present invention provides an insecticidal composition prepared from the following raw materials in parts by weight: 1-3 parts of neem seeds, 5-7 parts of purple-stemmed eupatorium, 2-4 parts of white-flowered beggar-ticks, and 8-30 parts of adjuvants.
[0006] Preferably, the additive contains the following raw materials in parts by weight: 2-12 parts dispersant, 2-6 parts wetting agent, 0.1-1.2 parts thickener, 1-5 parts preservative, 1-6 parts antifreeze agent, and 0.1-0.3 parts emulsifier.
[0007] Preferably, the dispersant is one or both of ammonium polyacrylate and sodium methylene dinaphthalene sulfonate; the wetting agent is one or both of isomeric alcohol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether; the thickener is xanthan gum; the preservative is potassium sorbate; the antifreeze agent is ethylene glycol; and the emulsifier is Tween 80.
[0008] The present invention also provides a method for preparing the composition, comprising the following steps: (1) Mix neem seeds with 70-80 wt% ethanol, extract and filter to obtain extract 1; (2) Mix Agastache rugosa with 70-80% ethanol, extract and filter to obtain extract 2; (3) Mix white beggar-ticks with 70-80% ethanol, extract and filter to obtain extract 3; (4) Mix the dispersant, wetting agent, preservative, antifreeze and water, and stir at 200~500 rpm for 10~15 min to obtain an aqueous solution of the additives; (5) Mix extract 1, extract 2, extract 3 and the aqueous solution of the auxiliary agent, then add thickener and emulsifier, and stir for 25~35 minutes to obtain the final product.
[0009] Preferably, in step (1), the ratio of neem seeds to ethanol is 0.8~1.0g:7~11mL; the extraction method is reflux extraction; the extraction time is 1.5~2.5h; and the extraction temperature is 40~60℃.
[0010] Preferably, in step (2), the ratio of the amount of *Eupatorium fortunei* and ethanol is 0.8-1.2 g: 8-12 mL; the extraction method is reflux extraction; the extraction time is 1-2 h; and the extraction temperature is 50-70 °C.
[0011] Preferably, in step (3), the ratio of Bidens pilosa to ethanol is 0.8~1.2g:8~10mL; the extraction method is reflux extraction; the extraction time is 1~2h; and the extraction temperature is 50~70℃.
[0012] Preferably, in step (5), the volume ratio of the mixture of extract 1, extract 2, extract 3 and the aqueous solution of the adjuvant is (1~3):(5~7):(2~4):(80~120); the mixing speed is 200~500 rpm; the mixing time is 5~15 min; and the stirring speed after adding the thickener and emulsifier is 200~500 rpm.
[0013] The present invention also provides the application of the composition in the control of agricultural and forestry pests, including spider mites, scale insects, rose thrips, and cowpea thrips.
[0014] The beneficial effects of this invention are as follows: This invention is the first to combine neem seed extract, Amorphophallus purpurea extract, and Bidens pilosa extract in a ternary compound. While Bidens pilosa extract alone has no insecticidal activity, it can significantly improve penetration and insecticidal effects. The three compounds work synergistically, overcoming the limitations of traditional binary compound pesticides and single-plant-derived pesticides, which have narrow insecticidal spectra and weak efficacy. It integrates the specific control efficacy of neem seed extract against thrips with the targeted killing advantage of Amorphophallus purpurea extract against spider mites, achieving synergistic control of mites, scale insects, and Thysanoptera pests with a broad insecticidal spectrum. Using Amorphophallus purpurea and Bidens pilosa as core raw materials, it transforms pests into valuable resources, demonstrating significant ecological and economic value. The optimized system of dispersants, humidifiers, thickeners, and antifreeze agents ensures strong efficacy stability and resistance to rain washout. All raw materials are natural extracts and environmentally friendly additives, making them safe, low in toxicity, residue-free, and phytotoxic, suitable for green and organic agricultural production. The preparation process is simple, easy to industrialize, and has high application value. Detailed Implementation
[0015] The present invention provides an insecticidal composition prepared from the following raw materials in parts by weight: 1-3 parts of neem seeds, 5-7 parts of purple-stemmed eupatorium, 2-4 parts of white-flowered beggar-ticks, and 8-30 parts of adjuvants.
[0016] In this invention, the composition is further preferably prepared from the following raw materials in parts by weight: 2 parts of neem seeds, 6 parts of purple-stemmed eupatorium, 3 parts of white-flowered beggar-ticks, and 19 parts of adjuvants.
[0017] In this invention, the additive preferably contains the following raw materials in parts by weight: 2-12 parts of dispersant, 2-6 parts of wetting agent, 0.1-1.2 parts of thickener, 1-5 parts of preservative, 1-6 parts of antifreeze agent, and 0.1-0.3 parts of emulsifier; more preferably, it contains the following raw materials in parts by weight: 10 parts of dispersant, 4 parts of wetting agent, 0.7 parts of thickener, 3 parts of preservative, 4 parts of antifreeze agent, and 0.2 parts of emulsifier.
[0018] In this invention, the dispersant is preferably one or two of ammonium polyacrylate and sodium methylene dinaphthalene sulfonate, more preferably ammonium polyacrylate; the wetting agent is preferably one or two of isomeric alcohol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether, more preferably isomeric alcohol polyoxyethylene ether; the thickener is preferably xanthan gum; the preservative is preferably potassium sorbate; the antifreeze agent is preferably ethylene glycol; and the emulsifier is preferably Tween 80.
[0019] The present invention also provides a method for preparing the composition, comprising the following steps: (1) Mix neem seeds with 70-80 wt% ethanol, extract and filter to obtain extract 1; (2) Mix Agastache rugosa with 70-80% ethanol, extract and filter to obtain extract 2; (3) Mix white beggar-ticks with 70-80% ethanol, extract and filter to obtain extract 3; (4) Mix the dispersant, wetting agent, preservative, antifreeze and water, and stir at 200~500 rpm for 10~15 min to obtain an aqueous solution of the additives; (5) Mix extract 1, extract 2, extract 3 and the aqueous solution of the auxiliary agent, then add thickener and emulsifier, and stir for 25~35 minutes to obtain the final product.
[0020] In this invention, the preferred ratio of neem seeds to ethanol in step (1) is 0.8~1.0g:7~11mL, more preferably 1g:10mL; the preferred extraction method is reflux extraction; the preferred extraction time is 1.5~2.5h, more preferably 2h; the preferred extraction temperature is 40~60℃, more preferably 50℃.
[0021] In this invention, the preferred ratio of the amount of *Agastache rugosa* and ethanol in step (2) is 0.8-1.2g:8-12mL, more preferably 1g:10mL; the preferred extraction method is reflux extraction; the preferred extraction time is 1-2h, more preferably 1.5h; the preferred extraction temperature is 50-70℃, more preferably 60℃.
[0022] In this invention, the preferred ratio of Bidens pilosa and ethanol in step (3) is 0.8~1.2g:8~10mL, more preferably 1g:10mL; the preferred extraction method is reflux extraction; the preferred extraction time is 1~2h, more preferably 1.5h; the preferred extraction temperature is 50~70℃, more preferably 60℃.
[0023] In this invention, the stirring speed in step (4) is preferably 300-400 rpm, and the stirring time is preferably 12 min.
[0024] In this invention, the volume ratio of the mixture of extract 1, extract 2, extract 3 and the aqueous solution of the adjuvant in step (5) is preferably (1~3):(5~7):(2~4):(80~120), and more preferably (1~3):(5~7):(2~4):(80~120); the mixing speed is preferably 200~500 rpm, more preferably 300~400 rpm, and the mixing time is preferably 5~15 min, more preferably 10 min; the stirring speed after adding the thickener and emulsifier is preferably 200~500 rpm, more preferably 300~400 rpm.
[0025] The present invention also provides the application of the composition in the control of agricultural and forestry pests, including spider mites, scale insects, rose thrips, and cowpea thrips.
[0026] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.
[0027] Example 1
[0028] 1. Raw material preparation
[0029] The ingredients are: 2 parts by weight of neem seeds, 6 parts by weight of purple-stemmed eupatorium, 3 parts by weight of white-flowered beggar-ticks, and 19 parts by weight of adjuvants. The adjuvants consist of 10 parts by weight of dispersant, 4 parts by weight of wetting agent, 0.7 parts by weight of thickener, 3 parts by weight of preservative, 4 parts by weight of antifreeze agent, and 0.2 parts by weight of emulsifier. Among them, the dispersant is ammonium polyacrylate, the wetting agent is isomeric alcohol polyoxyethylene ether, the thickener is xanthan gum, the preservative is potassium sorbate, the antifreeze agent is ethylene glycol, and the emulsifier is Tween 80.
[0030] 2. Preparation method
[0031] (1) Mix neem seeds with 75% ethanol at a solid-liquid ratio of 1 g: 10 mL and reflux extract at 50°C for 2 h. After extraction, filter to obtain extract 1.
[0032] (2) Mix Agastache rugosa with 75% ethanol at a solid-liquid ratio of 1 g: 10 mL and reflux extract at 60°C for 1.5 h. After extraction, filter to obtain extract 2.
[0033] (3) Mix white beggar-ticks with 75% ethanol at a solid-liquid ratio of 1 g: 10 mL and reflux extract at 60°C for 1.5 h. After extraction, filter to obtain extract 3.
[0034] (4) Mix the dispersant, wetting agent, preservative, antifreeze agent and deionized water, and stir at 350 rpm for 12 min to obtain an aqueous solution of the additives.
[0035] (5) Mix extract 1, extract 2, extract 3 and the aqueous solution of the adjuvant in a volume ratio of 2:6:3:100, stir at 350 rpm for 10 min, then add xanthan gum and Tween 80, and continue stirring at 350 rpm for 30 min to obtain the composition.
[0036] The corrected mortality rates of the pesticide obtained in this embodiment for spider mites, scale insects, rose thrips, and cowpea thrips after 48 hours were 92.41%, 89.65%, 90.22%, and 88.57%, respectively. No phytotoxicity phenomena such as stunting, chlorosis, or deformity were observed in the crops after field application, and the pesticide's effective period lasted up to 12 days.
[0037] Example 2
[0038] 1. Raw material preparation
[0039] The ingredients are: 1 part by weight of neem seeds, 5 parts by weight of purple-stemmed eupatorium, 2 parts by weight of white-flowered beggar-ticks, and 8 parts by weight of adjuvants. The adjuvants consist of 2 parts by weight of dispersant, 2 parts by weight of wetting agent, 0.1 parts by weight of thickener, 1 part by weight of preservative, 1 part by weight of antifreeze agent, and 0.1 parts by weight of emulsifier. The dispersant is ammonium polyacrylate, the wetting agent is isomeric alcohol polyoxyethylene ether, the thickener is xanthan gum, the preservative is potassium sorbate, the antifreeze agent is ethylene glycol, and the emulsifier is Tween 80.
[0040] 2. Preparation method
[0041] (1) Mix neem seeds with 70% ethanol at a solid-liquid ratio of 0.8 g: 7 mL and reflux extract at 40°C for 1.5 h. After extraction, filter to obtain extract 1.
[0042] (2) Mix Agastache rugosa with 70% ethanol at a solid-liquid ratio of 0.8 g: 8 mL and reflux extract at 50°C for 1 h. After extraction, filter to obtain extract 2.
[0043] (3) Mix white beggar-ticks with 70% ethanol at a solid-liquid ratio of 0.8 g: 8 mL and reflux extract at 50°C for 1 h. After extraction, filter to obtain extract 3.
[0044] (4) Mix the dispersant, wetting agent, preservative, antifreeze agent and deionized water, and stir at 200 rpm for 10 min to obtain an aqueous solution of the additives.
[0045] (5) Mix extract 1, extract 2, extract 3 and the aqueous solution of the adjuvant in a volume ratio of 1:5:2:80, stir at 200 rpm for 5 min, then add xanthan gum and Tween 80, and continue stirring at 200 rpm for 25 min to obtain the composition.
[0046] The corrected mortality rates of the pesticide obtained in this embodiment for spider mites, scale insects, rose thrips, and cowpea thrips after 48 hours were 81.26%, 77.33%, 79.51%, and 76.82%, respectively. The pesticide system was stable, with a field residual effect of up to 10 days, and no phytotoxicity was observed in crops during field application.
[0047] Example 3
[0048] 1. Raw material preparation
[0049] The ingredients are: 3 parts by weight of neem seeds, 7 parts by weight of purple-stemmed eupatorium, 4 parts by weight of white-flowered beggar-ticks, and 30 parts by weight of adjuvants. The adjuvants consist of 12 parts by weight of dispersant, 6 parts by weight of wetting agent, 1.2 parts by weight of thickener, 5 parts by weight of preservative, 6 parts by weight of antifreeze agent, and 0.3 parts by weight of emulsifier. The dispersant is ammonium polyacrylate, the wetting agent is isomeric alcohol polyoxyethylene ether, the thickener is xanthan gum, the preservative is potassium sorbate, the antifreeze agent is ethylene glycol, and the emulsifier is Tween 80.
[0050] 2. Preparation method
[0051] (1) Mix neem seeds with 80 vt% ethanol at a solid-liquid ratio of 1.0 g: 11 mL and reflux extract at 60 °C for 2.5 h. After extraction, filter to obtain extract 1.
[0052] (2) Mix Agastache rugosa with 80 t% ethanol at a solid-liquid ratio of 1.2 g: 12 mL and reflux extract at 70 °C for 2 h. After extraction, filter to obtain extract 2.
[0053] (3) Mix white beggar-ticks with 80% ethanol at a solid-liquid ratio of 1.2 g: 10 mL and reflux extract at 70°C for 2 h. After extraction, filter to obtain extract 3.
[0054] (4) Mix the dispersant, wetting agent, preservative, antifreeze agent and deionized water, and stir at 500 rpm for 15 min to obtain an aqueous solution of the additives.
[0055] (5) Mix extract 1, extract 2, extract 3 and the aqueous solution of the adjuvant in a volume ratio of 3:7:4:120, stir at 500 rpm for 15 min, then add xanthan gum and Tween 80, and continue stirring at 500 rpm for 35 min to obtain the composition.
[0056] The corrected mortality rates of the pesticide obtained in this embodiment for spider mites, scale insects, rose thrips, and cowpea thrips after 48 hours were 90.18%, 88.24%, 89.36%, and 87.91%, respectively. The pesticide solution exhibits excellent foliar adhesion and resistance to rain washout, good storage stability, and a field residual effect of up to 10 days, without causing any phytotoxicity to crops throughout the process.
[0057] Comparative Example 1
[0058] Compared with Example 1, only the raw material was adjusted to "single purple stem eupatorium", the total number of active raw materials remained at 11 parts, and the other components and preparation process were the same.
[0059] Beneficial effects: The corrected mortality rates of the pesticide obtained in this comparative example after 48 hours against spider mites, scale insects, rose thrips, and cowpea thrips were 65.28%, 42.15%, 38.62%, and 37.94%, respectively. It only showed some control effect against spider mites, and the control effect against scale insects and the two types of thrips was poor. The field residual effect was 6 days, and no phytotoxicity was observed in the crops.
[0060] Comparative Example 2
[0061] Compared with Example 1, only the raw material was adjusted to "single white Bidens pilosa", the total number of active raw materials remained at 11 parts, and the other components and preparation process were the same.
[0062] Beneficial effects: The pesticide obtained in this comparative example showed a corrected mortality rate of less than 30% against spider mites, scale insects, rose thrips, and cowpea thrips after 48 hours, indicating that it had virtually no insecticidal activity. The pesticide system was stable and no phytotoxicity was caused to crops.
[0063] Comparative Example 3
[0064] Compared with Example 1, only the raw material was adjusted to "single neem seed", the total number of active raw materials remained at 11 parts, and the other components and preparation process were the same.
[0065] Beneficial effects: The corrected mortality rates of the pesticide obtained in this comparative example for spider mites, scale insects, rose thrips, and cowpea thrips after 48 hours were 48.71%, 45.36%, 72.35%, and 71.89%, respectively. It was only effective against thrips, with a field residual effect of 8 days. It was not effective against spider mites and scale insects, and the pesticide was safe for crops in the field without causing phytotoxicity.
[0066] Comparative Example 4
[0067] Compared with Example 1, only the raw materials were adjusted to a "binary combination of neem seeds and purple stem eupatorium", with the ratio of the two remaining unchanged, the total number of active raw materials remaining at 11 parts, and the other components and preparation processes being the same.
[0068] Beneficial effects: The corrected mortality rates of the pesticide obtained in this comparative example against spider mites, scale insects, rose thrips, and cowpea thrips after 48 hours were 76.53%, 68.17%, 81.42%, and 80.65%, respectively. The control efficacy was better than that of single-raw material formulations. The field residual effect was 7 days, but it was much lower than that of the ternary compound system in Example 1. It only showed an additive effect of pesticide efficacy and had no synergistic effect. There was no pesticide damage to the crops throughout the entire process.
[0069] in conclusion
[0070] Using *Eupatorium adenophorum* alone only has a certain control effect on spider mites, with weak effects on thrips and scale insects; using *Neemia stenoptera* seeds alone is only effective in controlling two types of thrips, and is difficult to effectively kill spider mites and scale insects; using *Bidens pilosa* alone has virtually no insecticidal ability and cannot be used alone for pest control. The binary combination of *Neemia stenoptera* seeds and *Eupatorium adenophorum* only achieves a simple superposition of efficacy, although it broadens the insecticidal spectrum and improves the overall control effect, it does not produce a synergistic effect, and the comprehensive control capability is still quite limited. This invention adopts a ternary compound scheme of *Neemia stenoptera* seeds, *Eupatorium adenophorum*, and *Bidens pilosa*. The three raw materials work synergistically to produce a significant synergistic effect, making up for the deficiencies of individual components and binary combinations, and can simultaneously and effectively control four types of agricultural and forestry pests: spider mites, scale insects, rose thrips, and cowpea thrips. This ternary compound pesticide formulation has stable physicochemical properties, is safe for crops after application without causing phytotoxicity, and has the advantages of broad insecticidal spectrum, outstanding control efficacy, and green environmental protection, making it of good value for field promotion and application.
[0071] As shown in the above embodiments, the present invention provides an insecticidal composition, its preparation method, and its application. The composition is prepared from the following raw materials in parts by weight: 1-3 parts of neem seeds, 5-7 parts of *Eupatorium adenophorum*, 2-4 parts of *Bidens pilosa*, and 8-30 parts of adjuvants. The present invention extracts and scientifically combines the effective components of the three plants, resulting in a synergistic effect among the effective components of each raw material, effectively expanding the insecticidal range. The preparation obtained by the present invention has stable physicochemical properties, a simple preparation process, and is safe for crops after application, without causing phytotoxicity. It can effectively control various agricultural and forestry pests such as spider mites, scale insects, rose thrips, and cowpeas. The raw materials used in the present invention are readily available. While achieving green control of agricultural and forestry pests, it also realizes the resource utilization of invasive plants, possessing both ecological and practical value, and has broad application prospects.
[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A composition for insecticidal purposes, characterized in that, It is prepared from the following raw materials in parts by weight: 1-3 parts of neem seeds, 5-7 parts of purple-stemmed eupatorium, 2-4 parts of white-flowered beggar-ticks, and 8-30 parts of adjuvants.
2. The composition of claim 1, wherein, The additive contains the following raw materials in parts by weight: 2-12 parts dispersant, 2-6 parts wetting agent, 0.1-1.2 parts thickener, 1-5 parts preservative, 1-6 parts antifreeze agent, and 0.1-0.3 parts emulsifier.
3. The composition of claim 2, wherein, The dispersant is one or both of ammonium polyacrylate and sodium methylene dinaphthalene sulfonate; the wetting agent is one or both of isomeric alcohol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether; the thickener is xanthan gum; the preservative is potassium sorbate; the antifreeze agent is ethylene glycol; and the emulsifier is Tween 80.
4. A process for the preparation of a composition according to claim 3, characterized in that, Includes the following steps: (1) Mix neem seeds with 70-80 wt% ethanol, extract and filter to obtain extract 1; (2) Mix Agastache rugosa with 70-80% ethanol, extract and filter to obtain extract 2; (3) Mix white beggar-ticks with 70-80% ethanol, extract and filter to obtain extract 3; (4) Mix the dispersant, wetting agent, preservative, antifreeze and water, and stir at 200~500 rpm for 10~15 min to obtain an aqueous solution of the additives; (5) Mix extract 1, extract 2, extract 3 and the aqueous solution of the auxiliary agent, then add thickener and emulsifier, and stir for 25~35 minutes to obtain the final product.
5. The production method according to claim 4, characterized by, In step (1), the ratio of neem seeds to ethanol is 0.8~1.0g:7~11mL; the extraction method is reflux extraction; the extraction time is 1.5~2.5h; and the extraction temperature is 40~60℃.
6. The production method according to claim 5, wherein In step (2), the ratio of Agastache rugosa to ethanol is 0.8~1.2g:8~12mL; the extraction method is reflux extraction; the extraction time is 1~2h; and the extraction temperature is 50~70℃.
7. The preparation method according to claim 6, characterized in that, In step (3), the ratio of Bidens pilosa to ethanol is 0.8~1.2g:8~10mL; the extraction method is reflux extraction; the extraction time is 1~2h; and the extraction temperature is 50~70℃.
8. The preparation method according to claim 7, characterized in that, In step (5), the volume ratio of extract 1, extract 2, extract 3 and the aqueous solution of the auxiliary agent is (1~3):(5~7):(2~4):(80~120); the mixing speed is 200~500 rpm, the mixing time is 5~15 min; and the stirring speed after adding the thickener and emulsifier is 200~500 rpm.
9. The application of the composition according to any one of claims 1 to 3 in the control of agricultural and forestry pests, characterized in that, The pests include spider mites, scale insects, rose thrips, and cowpea thrips.