Insecticidal pesticide synergistic additive containing plant essential oil and preparation method thereof

Abstract

The invention provides an insecticidal pesticide synergistic additive containing plant essential oil and a preparation method thereof, and belongs to the technical field of pesticide synergists. The insecticidal pesticide synergistic aid containing the plant essential oil comprises a synergist matrix, a penetrating agent, an emulsifying agent, a thickening agent, an anti-freezing agent and the plant essential oil. The main component of the synergistic additive is esterified vegetable oil or fatty acid alkyl ester, and the synergistic additive has the advantages of low toxicity, difficult generation of drug resistance of target organisms, environmental friendliness and the like, and can be mixed with a penetrant, an emulsifier and a thickener for use, so that the wetting and infiltration capacity of pesticide liquid can be remarkably enhanced, a wax layer structure can be destroyed, the permeability of the pesticide liquid can be improved, and the pesticide effect can be improved. The added plant essential oil belongs to a natural active substance, has the characteristics of being green and environment-friendly, and can be matched with different pesticide formulations such as insecticides, bactericides, herbicides and the like for use.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticide synergists, in particular to an insecticide synergist auxiliary containing plant essential oil and a preparation method thereof. Background Art

[0002] Pesticides are a class of drugs used in agricultural production to kill insects, fungicides, and harmful animals (or weeds) to protect and promote the growth of plants and crops. Crops are widely cultivated worldwide, and pesticides are used in high quantities, but the effective utilization rate of traditional pesticide application methods is less than 30%. Large amounts of pesticides are lost into water bodies, soil, and other environmental environments during spraying, causing serious pollution. Excessive pesticide application has also led to a significant increase in pest resistance, compromising control effectiveness. To promote pesticide reduction and efficiency, improve pesticide reduction mechanisms, and ensure agricultural production safety, agricultural product quality safety, and ecological and environmental safety, it is particularly important to promote the reduction of chemical pesticides, strengthen their scientific and rational use, and improve their efficiency.

[0003] Plant leaves and pests have a dense waxy layer on their surfaces, making it difficult for pesticide droplets to wet the target surface, causing them to bounce and slide. Therefore, improving the wettability of the pesticide solution on the target organism and promoting its penetration and absorption is the key to solving the problem of low pesticide utilization.

[0004] Studies have found that pesticide synergists can improve the physical and chemical properties of the solution, enhance the target adsorption capacity, and regulate the release behavior. The rational use of synergists can reduce the amount of pesticide used by 20%-50%, while improving the prevention and control effect and effectively solving problems such as solution loss and increased target resistance.

[0005] Essential oils are volatile aromatic substances obtained through distillation or solvent extraction from various parts of plants, including flowers, leaves, branches, and seeds. Essential oils extracted from the leaves of mint and tea trees, for example, contain cooling or antibacterial properties. Citrus essential oils, derived from fruit peels, have become important synergists in agriculture due to their unique composition and mechanism of action. For example, D-limonene can dissolve the waxy layer on the surface of pests or the cell membranes of pathogens, promoting the rapid penetration of active pesticide ingredients. Therefore, the development of pesticide synergists containing plant essential oils is crucial for addressing poor wetting and penetration of pesticides and improving their utilization.

[0006] Chinese patent CN114081044A discloses a pesticide synergist containing holly plant essential oil and a preparation method thereof. The pesticide synergist is composed of holly plant essential oil, a surfactant, and water, and can significantly improve the efficacy of botanical pesticides and microbial pesticides. However, the amount of synergist added is relatively high, and the disclosure only shows a 25% increase in the control efficiency of rice blast, and the synergistic effect is still not high.

[0007] Therefore, further improving the synergistic effect of pesticide synergistic adjuvants is the main problem to be solved at present. Summary of the Invention

[0008] In view of this, the present invention provides an insecticide synergistic adjuvant containing plant essential oil, which can effectively destroy the wax layer structure, improve the permeability of the pesticide solution, improve the pesticide utilization rate and pesticide control effect, reduce the amount of pesticide used, and alleviate environmental pollution.

[0009] The insecticide synergistic adjuvant containing plant essential oil of the present invention comprises the following raw materials: synergist base, penetrant, emulsifier, thickener, antifreeze agent, plant essential oil;

[0010] The synergist matrix is ​​esterified vegetable oil or fatty acid alkyl ester.

[0011] Preferably, the insecticide pesticide synergistic adjuvant containing plant essential oil comprises the following raw materials in percentage by mass:

[0012]

[0013] Preferably, the esterified vegetable oil is one or more of esterified soybean oil, esterified peanut oil, esterified corn oil, esterified castor oil, esterified rapeseed oil, esterified sunflower oil, esterified coconut oil, esterified sesame oil, and esterified linseed oil; and the fatty acid alkyl ester is one or more of methyl oleate, methyl linoleate, butyl oleate, methyl laurate, ethyl laurate, ethyl myristate, isopropyl myristate, methyl hexadecanoate, isopropyl hexadecanoate, methyl octadecanoate, ethyl octadecanoate, and butyl octadecanoate.

[0014] Preferably, the emulsifier is one or more of octylphenol polyoxyethylene ether, tallow amine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, castor oil sodium sulfonate, fatty acid methyl ester ethoxylate, stearic acid polyoxyethylene ester, fatty alcohol polyoxyethylene ether sodium sulfate, isomeric tridecyl alcohol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, benzylphenol polyoxyethylene ether, and calcium dodecylbenzenesulfonate.

[0015] More preferably, the emulsifier is a mixture of castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether and castor oil sodium sulfonate.

[0016] More preferably, the mass ratio of ricinol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and castor oil sodium sulfonate in the emulsifier is 1-100:1-100:1-50.

[0017] Preferably, the penetrant is one or more of polyether-modified trisiloxane and JFC fatty alcohol polyoxyethylene ether; and the thickener is one or more of sodium dioctyl sulfosuccinate and coconut oil methyl monoethanolamide.

[0018] Preferably, the antifreeze agent is one or more of ethylene glycol, propylene glycol, and glycerol.

[0019] Preferably, the plant essential oil is at least one of citronellol, geraniol, rhodiol and farnesol.

[0020] The preparation method of the pesticide synergistic adjuvant of the present invention comprises the following steps: firstly, adding an emulsifier and a penetrant into esterified vegetable oil and mixing them uniformly; then, adding a thickener and an antifreeze agent thereto, and mechanically stirring at 25-50° C. until transparent; and after cooling, adding plant essential oil, and continuing to stir uniformly to obtain the pesticide synergistic adjuvant.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The insecticide synergistic adjuvant containing plant essential oil provided by the present invention is mainly composed of esterified plant oil or fatty acid alkyl ester, which has the advantages of low toxicity, low resistance of target organisms to drug resistance, and environmental friendliness.

[0023] 2. The insecticide synergistic adjuvant containing plant essential oil provided by the present invention can significantly enhance the wetting and penetration ability of the pesticide solution, effectively destroy the wax layer structure, increase the permeability of the pesticide solution, improve the utilization rate of the pesticide and the pesticide control effect, reduce the amount of pesticide used, and reduce environmental pollution.

[0024] 3. The plant essential oils of the present invention are natural active substances that are environmentally friendly and can be used in conjunction with various pesticide formulations, such as insecticides, fungicides, and herbicides. Furthermore, the present invention expands the uses of citronellol, geraniol, rhodiol, and farnesol. As components of pesticide synergists, they enhance the insecticidal activity of pesticides, providing a new direction for the preparation of plant-friendly pesticide synergists. DETAILED DESCRIPTION

[0025] The present invention provides an insecticide synergistic adjuvant containing plant essential oil, which comprises the following raw materials:

[0026]

[0027] The synergist matrix is ​​esterified vegetable oil or fatty acid alkyl ester.

[0028] The esterified vegetable oil is one or more of esterified soybean oil, esterified peanut oil, esterified corn oil, esterified castor oil, esterified rapeseed oil, esterified sunflower oil, esterified coconut oil, esterified sesame oil, and esterified linseed oil; the fatty acid alkyl ester is one or more of methyl oleate, methyl linoleate, butyl oleate, methyl laurate, ethyl laurate, ethyl myristate, isopropyl myristate, methyl hexadecanoate, isopropyl hexadecanoate, methyl octadecanoate, ethyl octadecanoate, and butyl octadecanoate.

[0029] In a specific embodiment of the present invention, the esterified vegetable oil and fatty acid alkyl ester are both conventional commercial products.

[0030] The present invention will be further described below with reference to specific examples and comparative examples.

[0031] Example 1

[0032] A synergistic adjuvant for insecticide containing plant essential oil, which is composed of the following raw materials in percentage by mass:

[0033]

[0034] Preparation method: Take each component according to the above ratio, add the synergist base, emulsifier and penetrant in sequence, mix evenly under constant temperature magnetic stirring at 30°C, then add the thickener and antifreeze agent, stir until transparent, finally add the essential oil, and continue stirring to obtain the pesticide synergistic adjuvant.

[0035] Example 2

[0036] A synergistic adjuvant for insecticide containing plant essential oil, which is composed of the following raw materials in percentage by mass:

[0037]

[0038] Preparation method: Take each component according to the above ratio, add the synergist base, emulsifier and penetrant in sequence, mix evenly under constant temperature magnetic stirring at 40°C, then add the thickener and antifreeze agent, stir until transparent, finally add the essential oil, and continue stirring to obtain the pesticide synergistic adjuvant.

[0039] Example 3

[0040] A synergistic adjuvant for insecticide containing plant essential oil, which is composed of the following raw materials in percentage by mass:

[0041]

[0042]

[0043] Preparation method: Take each component according to the above ratio, add the synergist base, emulsifier and penetrant in sequence, mix evenly under constant temperature magnetic stirring at 30°C, then add the thickener and antifreeze agent, stir until transparent, finally add the essential oil, and continue stirring to obtain the pesticide synergistic adjuvant.

[0044] Example 4

[0045] A synergistic adjuvant for insecticide containing plant essential oil, which is composed of the following raw materials in percentage by mass:

[0046]

[0047] Preparation method: Take each component according to the above ratio, add the synergist base, emulsifier and penetrant in sequence, mix evenly under constant temperature magnetic stirring at 40°C, then add the thickener and antifreeze agent, stir until transparent, finally add the essential oil, and continue stirring to obtain the pesticide synergistic adjuvant.

[0048] Example 5

[0049] A synergistic adjuvant for insecticide containing plant essential oil, which is composed of the following raw materials in percentage by mass:

[0050]

[0051] Preparation method: Take each component according to the above ratio, add the synergist base, emulsifier and penetrant in sequence, mix evenly under constant temperature magnetic stirring at 40°C, then add the thickener and antifreeze agent, stir until transparent, finally add the essential oil, and continue stirring to obtain the pesticide synergistic adjuvant.

[0052] Example 6

[0053] A synergistic adjuvant for insecticide containing plant essential oil, which is composed of the following raw materials in percentage by mass:

[0054]

[0055] Preparation method: Take each component according to the above ratio, add the synergist base, emulsifier and penetrant in sequence, mix evenly under constant temperature magnetic stirring at 40°C, then add the thickener and antifreeze agent, stir until transparent, finally add the essential oil, and continue stirring to obtain the pesticide synergistic adjuvant.

[0056] Comparative Example 1

[0057] A synergistic adjuvant for insecticides containing plant essential oils. The original drug composition is similar to that of Example 1, except that an equal amount of polyoxyethylene hydrogenated castor oil is used instead of sodium castor oil sulfonate.

[0058] Comparative Example 2

[0059] A synergistic adjuvant for insecticide containing plant essential oil, wherein the original drug composition is similar to that of Example 2, except that coconut methyl monoethanolamide and fatty alcohol polyoxyethylene ether are not added in Example 2.

[0060] Comparative Example 3

[0061] A synergistic adjuvant for insecticide containing plant essential oil, wherein the original drug composition is similar to that of Example 3, except that geraniol is not added in Example 3.

[0062] Comparative Example 4

[0063] A synergistic adjuvant for insecticide containing plant essential oils, wherein the original drug composition is similar to that of Example 4, except that citronellol and geraniol are not added in Example 4.

[0064] Comparative Example 5

[0065] A synergistic adjuvant for insecticide containing plant essential oil, wherein the original drug composition is similar to that of Example 5, except that farnesol and polyether-modified trisiloxane are not added in Example 5.

[0066] Comparative Example 6

[0067] A synergistic adjuvant for insecticide containing plant essential oils, wherein the original drug composition is similar to that of Example 5, except that lauryl alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and farnesol are not added in Comparative Example 6.

[0068] Comparative Example 7

[0069] A synergistic adjuvant for insecticides containing plant essential oils. The original drug composition is similar to that of Example 6, except that, in Comparative Example 7, no rose alcohol is added, and an equal amount of polyethylene glycol is used instead of polyether-modified trisiloxane.

[0070] Comparative Example 8

[0071] A synergistic adjuvant for insecticides containing plant essential oils, wherein the original drug composition is the same as that of Example 6, except that polyether-modified trisiloxane and coconut oil methyl monoethanolamide are not added in Comparative Example 8.

[0072] Performance tests were performed on the embodiments and comparative examples, as well as commercially available synergists. In the following experiments, the vegetable oil synergist was the methylated ethylated vegetable oil adjuvant "Invteng" 2020 / 08 / 21 / 01 produced by Victoria Chemicals, Australia; the organosilicon synergist was "Effective King" 2021 / 09 / 15 / 01 produced by Shandong Bestway Crop Protection Co., Ltd.

[0073] Experiment 1: The wetting and penetration properties of the synergists prepared in the Examples and Comparative Examples were tested. The synergist was diluted 2000 times and the wetting power of the solution was measured using a pure cotton canvas according to the method of GB / T 11983-2008. The time required for the cotton canvas to contact the liquid surface and begin to settle was recorded as the wetting time of the cotton canvas in the solution. The results are shown in Table 1.

[0074] Table 1

[0075]

[0076]

[0077] As can be seen from Table 1, the wetting and penetration properties of the synergist prepared by the present invention are better than those of the commercially available vegetable oil synergist, organosilicon synergist and comparative example.

[0078] Experiment 2: A 20% acetamiprid soluble solution was prepared into a solution with a mass concentration of 170 mg / L. A synergist was added to the solution at a mass concentration of 0.1%. The surface tension of the solution and the contact angle on weed leaves and wheat leaves were measured. The results are shown in Table 2.

[0079] Table 2

[0080]

[0081] As can be seen from Table 2, after the synergistic adjuvant of the embodiment of the present invention is added to the acetamiprid solution, the surface tension and contact angle of the solution are reduced, and the wetting performance is better than that of the commercially available vegetable oil synergistic adjuvant and the comparative example synergistic adjuvant.

[0082] Experiment 3: Results of the synergistic effect of acetamiprid on wheat aphids

[0083] 20% acetamiprid soluble concentrate was prepared with water to a solution with a mass concentration of 170 mg / L. A synergistic adjuvant with a mass concentration of 0.1% was added to the solution. The solution was sprayed at a spray volume of 40 L / mu during the wheat aphid infestation period. The control effect on wheat aphids was recorded 24 hours and 48 hours after spraying. The results are shown in Table 3.

[0084] Table 3

[0085]

[0086]

[0087] As can be seen from Table 3, after adding the synergistic adjuvant of the embodiment of the present invention to the acetamiprid solution, the control effect on wheat aphids was significantly improved, and the synergistic performance was better than that of the commercially available vegetable oil synergistic adjuvant and the comparative example synergistic adjuvant.

[0088] Experiment 4: Results of the test on the effect of synergistic adjuvant on the control of cotton aphids with flupyralid soluble concentrate

[0089] A synergistic adjuvant with a mass concentration of 0.1% was added to a 17% flupyralid soluble concentrate, and the cotton seedlings were sprayed at a rate of 30 mL / mu and a water volume of 30 L / mu. The control effect on cotton aphids was recorded 24 h and 48 h after spraying. The results are shown in Table 4.

[0090] Table 4

[0091] sample 24h protective effect after medication / % 48h protective effect after medication / % Flupyralidone 24.0 57.1 Flupyralidone+synergistic aid of Example 1 78.7 96.6 Flupyralidone+Example 2 synergistic aid 70.9 89.2 Flupyralidone+Example 3 synergistic aid 67.3 90.1 Flupyralidone+synergistic aid of comparative example 1 63.5 77.4 Flupyralidone+Comparative Example 2 synergistic aid 57.5 66.3 Flupyralidone+Comparative Example 3 synergistic aid 51.2 65.0 Flupyralidone + vegetable oil synergist (commercially available) 56.8 79.5

[0092] As can be seen from Table 4, the addition of the synergistic adjuvant of the present invention to the flupyralidone solution greatly improved the control effect on cotton aphids. The synergistic performance of the synergistic adjuvant of the present invention is better than that of the commercially available vegetable oil synergistic adjuvant and the comparative example synergistic adjuvant.

[0093] Experiment 5: Results of the synergistic test on the effect of flupyrazone on the control of cotton aphids

[0094] After dissolving the flupyralidone stock drug in a small amount of acetone, it was diluted with Tween 80 to a series of concentrations. A synergist with a mass concentration of 0.1% was added to each concentration. The cotton aphid was tested indoors using the insect and leaf immersion method. The mortality of the cotton aphid after 24 hours was recorded and the LC was calculated. 50 The results are shown in Table 5.

[0095] Table 5

[0096] sample <![CDATA[24hLC 50 / mg / L]]> Efficiency ratio Flupyralidone 9.66 — Flupyralidone+Example 3 synergistic aid 7.21 1.34 Flupyralidone+Example 4 synergistic aid 6.70 1.44 Flupyralidone+Example 5 synergistic aid 6.60 1.46 Flupyralidone+synergistic aid of Example 7 4.65 2.08 Flupyralidone+Comparative Example 3 synergistic aid 8.52 1.16 Flupyralidone+Comparative Example 4 synergistic aid 8.98 1.10 Flupyralidone+Comparative Example 5 synergistic aid 8.45 1.14 Flupyralidone+Comparative Example 7 synergistic aid 9.03 1.07

[0097] As can be seen from Table 5, the LC value of flupyrazone original drug on cotton aphids at 24h is 50 The LC value of the synergistic adjuvant of the present invention is 9.66 mg / L. 50 The concentrations of fluoropyraclostrobin and fluoropyraclostrobin in the mixture were respectively reduced to 4.65 mg / L-7.21 mg / L. It can be seen that the synergistic adjuvant enhances the toxicity to cotton aphids, and the synergistic ratio is 1.34-2.08. The synergistic effect of the synergistic adjuvant of the present invention on flupyraclostrobin is better than that of the synergistic adjuvant of the comparative example.

[0098] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pesticide synergistic adjuvant containing plant essential oil, characterized in that: Including the following raw materials: synergist base, penetrant, emulsifier, thickener, antifreeze agent, plant essential oil; The synergist matrix is ​​esterified vegetable oil or fatty acid alkyl ester.

2. The insecticide synergistic adjuvant containing plant essential oil according to claim 1, characterized in that Calculated by mass percentage, it includes the following raw materials:

3. The insecticide synergistic adjuvant containing plant essential oil according to claim 1, characterized in that The esterified vegetable oil is one or more of esterified soybean oil, esterified peanut oil, esterified corn oil, esterified castor oil, esterified rapeseed oil, esterified sunflower oil, esterified coconut oil, esterified sesame oil, and esterified linseed oil; the fatty acid alkyl ester is one or more of methyl oleate, methyl linoleate, butyl oleate, methyl laurate, ethyl laurate, ethyl myristate, isopropyl myristate, methyl hexadecanoate, isopropyl hexadecanoate, methyl octadecanoate, ethyl octadecanoate, and butyl octadecanoate.

4. The insecticide synergistic adjuvant containing plant essential oil according to claim 1, characterized in that The emulsifier is one or more of octylphenol polyoxyethylene ether, tallow amine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether sodium sulfate, castor oil sodium sulfonate, fatty acid methyl ester ethoxylate, stearic acid polyoxyethylene ester, fatty alcohol polyoxyethylene ether sodium sulfate, isomeric tridecyl alcohol polyoxyethylene ether, lauryl alcohol polyoxyethylene ether, benzylphenol polyoxyethylene ether, and calcium dodecylbenzenesulfonate.

5. The insecticide synergistic adjuvant containing plant essential oil according to claim 4, characterized in that The emulsifier is a mixture of castor oil polyoxyethylene ether, fatty alcohol polyoxyethylene ether and castor oil sodium sulfonate.

6. The insecticide synergistic adjuvant containing plant essential oil according to claim 5, characterized in that: The mass ratio of ricinol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and castor oil sodium sulfonate in the emulsifier is 1-100:1-100:1-50.

7. The insecticide synergistic adjuvant containing plant essential oil according to claim 1, characterized in that: The penetrant is one or more of polyether-modified trisiloxane and JFC fatty alcohol polyoxyethylene ether; the thickener is one or more of sodium dioctyl sulfosuccinate and coconut oil methyl monoethanolamide.

8. The insecticide synergistic adjuvant containing plant essential oil according to claim 1, characterized in that: The antifreeze agent is one or more of ethylene glycol, propylene glycol and glycerol.

9. The insecticide synergistic adjuvant containing plant essential oil according to claim 1, characterized in that: The plant essential oil is at least one of citronellol, geraniol, rhodiol and farnesol.

10. The method for preparing the insecticide synergistic adjuvant containing plant essential oil according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: firstly, adding an emulsifier and a penetrant into esterified vegetable oil and mixing them evenly; then adding a thickener and an antifreeze agent thereto, and mechanically stirring at 25-50 DEG C until transparent; after cooling, adding plant essential oil, and continuing to stir evenly to obtain a pesticide synergistic adjuvant.

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