Pesticide synergist with high bamboo vinegar content, preparation method and application thereof

Abstract

The application discloses a pesticide synergist with high bamboo vinegar content and a preparation method and application thereof, and belongs to the technical field of pesticide adjuvants. The synergist is composed of 80-98% refined bamboo vinegar liquid and 2-20% wetting and spreading agent, and the wetting and spreading agent is at least one of trisiloxane ethoxylate organic silicon surfactant or alkyl polyglycoside. The preparation method is to mix the refined bamboo vinegar liquid with the wetting and spreading agent through low-speed mixing and high-speed homogenization treatment to obtain a uniform and transparent finished product. The application takes natural bamboo vinegar liquid as the main body, cooperates with the wetting and spreading agent to construct a double synergistic system of "super spreading + deep penetration", can significantly improve the deposition rate and penetration efficiency of the effective components of the pesticide, and significantly improves the control effect. The raw materials of the application are environment-friendly, the process is simple, the cost is low, the compatibility is wide, the high-value utilization of the bamboo vinegar liquid is realized, and an effective scheme is provided for green agricultural production.

Description

Technical Field

[0001] This invention relates to the field of pesticide adjuvant technology, and in particular to a pesticide synergist with high bamboo vinegar content, its preparation method, and its application. Background Technology

[0002] Pesticide utilization rate is a core factor determining the effectiveness of pest and disease control, reducing agricultural production costs, and minimizing environmental impact. Currently, in agricultural production, organosilicon-based wetting and spreading agents are widely used to improve pesticide deposition and spreading performance on target plant surfaces. While these adjuvants can effectively reduce the surface tension of pesticide solutions and improve their adhesion to plant surfaces, their function is limited, only optimizing spreading at the physical level. Their role in promoting the penetration of pesticide active ingredients into the plant, combating pests hidden within plant tissues or concealed areas, and enhancing the long-term efficacy of pesticides is very limited.

[0003] Bamboo vinegar is a natural byproduct produced during the pyrolysis of bamboo. Its complex composition contains hundreds of organic active substances and has been proven to possess certain bactericidal, insecticidal, and plant growth-promoting effects. However, due to its strong acidity, distinctive odor, and poor component stability, current technologies only use it as an auxiliary ingredient in pesticide formulations or extract a single active component through complex processes. Its addition amount in formulations is generally low, typically not exceeding 10%, failing to fully leverage its natural penetration, fumigation, and synergistic effects, and thus failing to realize its core value as a comprehensive synergistic agent.

[0004] Currently, there is no existing technology that uses bamboo vinegar as the main component at a high proportion of over 80% to form a synergistic system with a highly effective wetting and spreading agent. This high-proportion compounding approach is also beyond the conventional understanding of those skilled in the art. Furthermore, the compounding of high-proportion bamboo vinegar with wetting and spreading agents faces multiple technical challenges: First, there is the issue of formulation stability, as highly acidic bamboo vinegar easily interacts with surfactants, leading to system stratification and turbidity, affecting product storage and usage efficacy. Second, there is the issue of compatibility with commercial pesticides, as a high proportion of bamboo vinegar may alter the pH value and system stability of the pesticide solution, affecting the activity of the pesticide's active ingredients. Third, there is the issue of synergistic bioactivity, how to achieve an efficient fusion of the natural activity of bamboo vinegar and the physical spreading properties of the wetting and spreading agent to achieve a synergistic effect of 1+1>2 has become a technical bottleneck that urgently needs to be overcome in this field. Summary of the Invention

[0005] This invention aims to overcome the limitations and shortcomings of existing pesticide adjuvants, such as limited functionality, low application rate of bamboo vinegar, and limited synergistic effects. It provides a novel, highly effective, and environmentally friendly pesticide synergist. This invention overturns the traditional design concept of pesticide adjuvants based primarily on synthetic chemicals. For the first time, it uses an ultra-high proportion of bamboo vinegar as the main functional component. Leveraging its natural penetration, fumigation, and activity-regulating properties, combined with a small amount of highly efficient wetting and spreading agent, it constructs a pesticide adjuvant system that deeply integrates physical spreading and biological activity synergistic mechanisms. This achieves multiple goals, including improved pesticide utilization, reduced dosage, and enhanced control efficacy.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a pesticide synergist, which is composed of the following raw materials by volume percentage: Bamboo vinegar: 80%~98%; Wetting and spreading agent: 2%~20%.

[0007] Preferably, the bamboo vinegar is refined bamboo vinegar, which is obtained through sedimentation, filtration and aging, and its pH value is 2.8~3.8.

[0008] Preferably, the wetting and spreading agent is selected from at least one of trisiloxane ethoxylate organosilicon surfactants and alkyl polysaccharides.

[0009] Secondly, the present invention provides a method for preparing the above-mentioned pesticide synergist, comprising the following steps: S1. Preparation of refined bamboo vinegar: The bamboo vinegar is subjected to precipitation, filtration and aging treatment, and the pH value is adjusted to 2.8~3.8 for later use; S2. Low-speed mixing: Place the amount of refined bamboo vinegar liquid in the mixing container, stir at a speed of 100~300 rpm, and slowly add the amount of wetting and spreading agent in the formula; S3. High-speed homogenization: After the addition is complete, increase the speed to 300-500 rpm and continue stirring for 20-30 minutes until the mixture forms a uniform, transparent liquid, which is the pesticide synergist.

[0010] Thirdly, the present invention provides the application of the above-mentioned pesticide synergist in enhancing pesticide efficacy. The application method is as follows: the synergist is added to the pesticide dilution solution, and the volume concentration of the synergist in the final application solution is 0.1% to 1.0%. After mixing evenly, the solution is used for foliar spraying; the pesticide is an insecticide, fungicide, or herbicide.

[0011] The beneficial effects of this invention are as follows: 1. Innovative Formulation, Significant Synergistic Effect: This invention breaks through the limitations of existing technologies on the application ratio of bamboo vinegar, increasing the proportion of bamboo vinegar to over 80% for the first time, transforming it from an auxiliary component into a functional main component. The high-content bamboo vinegar not only possesses fumigation, bactericidal, and insecticidal activities, but its rich organic acids and phenolic small molecules also significantly enhance the penetration ability of the solution. Combined with 2%~20% of a highly efficient wetting and spreading agent, a synergistic effect of "super-spreading + deep penetration" can be achieved—the wetting and spreading agent allows the solution to quickly spread on the target surface, forming a uniform liquid film. The bamboo vinegar, with the help of this film, rapidly penetrates into the plant stomata, epidermis, or insect body wall, "carrying" the active ingredients of the pesticide to the target site. This solves the problem of traditional adjuvants only spreading and not penetrating deeply, achieving a synergistic effect of "1+1 is far greater than 2".

[0012] 2. Significantly enhanced efficacy, achieving reduced pesticide use and increased efficiency: Through the dual effects of physical spreading and biological penetration, the synergist of this invention can significantly improve the effective deposition rate and absorption efficiency of pesticides on the target. Field trials have confirmed that the treatment group with added synergist showed significantly improved control effects against aphids, downy mildew, rice planthoppers, and other pests and weeds.

[0013] 3. Environmentally Friendly and High-Value Resource Utilization: This invention uses bamboo vinegar, a renewable bamboo byproduct, as the main raw material, significantly replacing traditional petroleum-based solvents and synthetic surfactants. The bamboo vinegar is biodegradable, causing no secondary pollution. The wetting and spreading agents are selected from environmentally friendly components, resulting in a high overall product biodegradability rate and no harm to soil, water, or beneficial organisms. Simultaneously, this invention opens up high-value application pathways for bamboo vinegar, an agricultural byproduct, enhancing the added value of the bamboo processing industry chain and promoting resource recycling.

[0014] 4. Simple preparation and significant cost advantage: The synergist of this invention contains only two core components, bamboo vinegar and wetting and spreading agent, without the need to add additional solvents, stabilizers and other excipients. The formula is simple, the raw materials are readily available and the cost is low. The preparation process only involves physical mixing and homogenization steps, without the need for complex equipment and harsh reaction conditions such as high temperature and high pressure. The process is simple, energy consumption is low, and it is easy to realize large-scale industrial production, making it suitable for promotion and application.

[0015] 5. Wide compatibility and broad applicability: The synergist of this invention has good compatibility with various commercial insecticides, fungicides, and herbicides. Its addition will not affect the stability of the active ingredients of pesticides. It can be widely used in various crops such as rice, cucumber, corn, wheat, vegetables, and fruit trees. It has a significant synergistic effect on a variety of pests, diseases, and weeds, and has extremely strong applicability. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a flowchart illustrating the preparation process of the pesticide synergist of the present invention; Figure 2 This is a flowchart illustrating the application process of the pesticide synergist of the present invention. Detailed Implementation

[0018] 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.

[0019] Example 1: Preparation of pesticide synergists Raw material ratio (volume percentage): Refined bamboo vinegar (pH=3.2): 98% Trisiloxane ethoxylate: 2% Preparation method: 1. Add 980L of refined bamboo vinegar liquid to the mixing tank.

[0020] 2. Turn on the stirrer and set the speed to 150 rpm. Slowly and evenly add 20 L of trisiloxane ethoxylate, controlling the dripping time to 12 minutes while stirring.

[0021] 3. After the addition is complete, increase the stirring speed to 350 rpm and continue stirring for 30 minutes until the mixture forms a homogeneous, transparent brown liquid; 4. Sampling and testing are conducted to confirm the absence of stratification and sedimentation, and that the product meets the standards. The material is then discharged, sealed, and packaged to obtain the finished product. Example 2: Preparation of pesticide synergists Raw material ratio (volume percentage): Refined bamboo vinegar (pH=3.2): 90% Trisiloxane ethoxylate: 10% Preparation method: Following the preparation steps of Example 1, only the raw material ratio and the dropping time were adjusted to 15 minutes, and the high-speed stirring time was adjusted to 25 minutes, finally obtaining a uniform, transparent brownish-brown liquid product.

[0022] Example 3: Preparation of pesticide synergists Raw material ratio (volume percentage): Refined bamboo vinegar (pH=3.5): 82% Alkyl polysaccharide glycoside: 18% Preparation method: Following the preparation steps of Example 1, the low-speed stirring speed was 200 rpm and the dropping time was 13 minutes, while the high-speed stirring speed was 400 rpm and the stirring time was 22 minutes, finally obtaining a uniform, transparent brownish-brown liquid product.

[0023] Application effect test case Experimental Example 1: Application in the control of cucumber powdery mildew (fungicide) (1) Experimental materials: The experimental crop was cucumber, which was planted in a greenhouse and was 30 days old. The experiment was conducted at the early stage of powdery mildew. The experimental agent was 50% azoxystrobin water-dispersible granules. The synergist was the finished product prepared in Example 1 and Example 2.

[0024] 2. Experimental Design: The experiment consisted of 3 treatment groups, with 3 replicates per group. The plot area was 10㎡, and the groups were arranged in a randomized block design with a 1m spacing between each group. Isolation rows were set up to avoid cross-contamination.

[0025] Control group: Only sprayed with 3000 times dilution of 50% azoxystrobin water-dispersible granules; Experimental Group A: Spray with 50% azoxystrobin at a dilution of 3000 times + synergist from Example 1, with the synergist having a volume concentration of 0.15% in the final solution; Experimental Group B: Spray with 50% azoxystrobin at a dilution of 3000 times + synergist from Example 2. The volume concentration of the synergist in the final solution was 0.2%.

[0026] 3. Application and Survey Methods: Use a backpack sprayer for uniform spraying. Apply the pesticide on a sunny morning between 9 and 11 am, in calm or light wind conditions. Seven days after application, use a five-point sampling method, surveying 20 leaves at each point, recording the number of diseased leaves and disease severity, and calculating the control effect. Control effect (%) = (Disease index of control group - Disease index of treatment group) / Disease index of control group × 100%.

[0027] 4. Results and Analysis: The control effect was investigated 7 days after application. The control effect in the control group was 76.5%, in experimental group A it was 89.3%, and in experimental group B it was 95.8%. The results indicate that both formulations of the synergist significantly improved the control efficacy. Compared to the control group, the efficacy increases were 16.7% and 25.2%, respectively.

[0028] Experimental Example 2: Application in the control of rice planthoppers (insecticide) 1. Experimental materials: The experimental crop was rice, in the tillering stage; the experimental target was rice planthopper (mainly brown planthopper); the experimental pesticide was 25% pymetrozine suspension; the synergist was the finished product prepared in Examples 2 and 3.

[0029] 2. Experimental design: The experiment consisted of 3 treatment groups, with 3 replicates per group, a plot area of ​​15㎡, randomized block design, and a 3m isolation zone for each group.

[0030] Control group: Only sprayed with 25% pymetrozine suspension at a dilution of 2000 times; Experimental Group C: Sprayed with 25% pymetrozine at a dilution of 2000 times + synergist from Example 2, with a synergist volume concentration of 0.3%; Experimental group D: Spray with 25% pymetrozine at a dilution of 2000 times + synergist from Example 3, with a volume concentration of 0.3% for the synergist.

[0031] 3. Application and survey methods: Electric sprayers were used for spraying. The application time was from 5 pm to 7 pm in windless weather. Seven days after application, the number of insects was investigated using the basin tapping method. Five points were investigated in each plot, with one clump of rice at each point, and the insect population reduction rate (control effect) was calculated.

[0032] 4. Results and Analysis: A survey was conducted 7 days after application. The control efficacy was 78.3% in the control group, 95.6% in experimental group C, and 92.1% in experimental group D. Both experimental groups showed excellent synergistic effects. Compared to the control group, the efficacy increases were 22.1% and 17.6%, respectively.

[0033] Experimental Example 3: Application in weed control (herbicide) in corn fields 1. Experimental materials: The experimental crop was maize, which was in the 3-leaf and 1-heart stage; the experimental objects were annual weeds in the maize field (mainly barnyard grass, barnyard grass, and foxtail grass); the experimental agent was 30% nicosulfuron dispersible oil suspension; the synergist was the finished product prepared in Example 1.

[0034] 2. Experimental design: The experiment consists of two treatment groups, each with three replicates, and a plot area of ​​20㎡, arranged randomly.

[0035] Control group: Sprayed with 30% nicosulfuron dispersible oil suspension at the recommended dose; Experimental Group E: Spray with 30% nicosulfuron recommended dose solution + synergist from Example 1, synergist volume concentration 0.1%.

[0036] 3. Application and Survey Methods: Apply the pesticide evenly using a sprayer between 10:00 AM and 12:00 PM on sunny days. Fifteen days after application, survey the fresh weight of weeds in each plot and calculate the control efficacy. Fresh weight control efficacy (%) = (Fresh weight of weeds in the control group - Fresh weight of weeds in the treatment group) / Fresh weight of weeds in the control group × 100%.

[0037] 4. Results and Analysis: Fresh weight efficacy was assessed 15 days after application. The fresh weight efficacy in the control group was 80.2%, while that in the experimental group E was 94.5%, representing a 17.8% increase in efficacy. This indicates that high-content bamboo vinegar significantly promotes the penetration and translocation of herbicides into the cuticle and wax layer of weed leaves, allowing the active ingredients of the herbicide to fully exert their effects, resulting in more thorough and longer-lasting weed control.

[0038] In summary, the above embodiments and application test examples fully demonstrate that, within the mixing ratio range of 80%~98% bamboo vinegar and 2%~20% wetting and spreading agent, the synergists of this invention exhibit significant synergistic effects on insecticides, fungicides, and herbicides, with efficacy increases reaching over 16%. Furthermore, the formulation is stable, has good compatibility with pesticides, is easy to prepare, and is environmentally friendly. This invention effectively solves the problems of existing pesticide adjuvants having limited function, low utilization rate of bamboo vinegar, and large pesticide dosages, providing a practical technical solution for the development of green agriculture and possessing broad prospects for promotion and application.

[0039] 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. A pesticide synergist with high bamboo vinegar content, characterized in that: It consists of the following raw materials by volume percentage: Bamboo vinegar: 80%~98%; Wetting and spreading agent: 2%~20%.

2. The pesticide synergist with high bamboo vinegar content according to claim 1, characterized in that, The bamboo vinegar is refined bamboo vinegar, obtained through sedimentation, filtration and aging, and its pH value is 2.8~3.

8.

3. The pesticide synergist with high bamboo vinegar content according to claim 1, characterized in that, The wetting and spreading agent is selected from at least one of trisiloxane ethoxylate organosilicon surfactants and alkyl polysaccharides.

4. A method for preparing a pesticide synergist with high bamboo vinegar content as described in any one of claims 1 to 3, characterized in that, Includes the following steps: S1. Preparation of refined bamboo vinegar: The bamboo vinegar is subjected to precipitation, filtration and aging treatment, and the pH value is adjusted to 2.8~3.8 for later use; S2. Low-speed mixing: Place the amount of refined bamboo vinegar liquid in the mixing container, stir at a speed of 100~300 rpm, and slowly add the amount of wetting and spreading agent in the formula; S3. High-speed homogenization: After the addition is complete, increase the speed to 300-500 rpm and continue stirring for 20-30 minutes until the mixture forms a uniform, transparent liquid, which is the pesticide synergist.

5. The application of the pesticide synergist with high bamboo vinegar content as described in any one of claims 1 to 3 in improving pesticide efficacy.

6. The application according to claim 5, characterized in that, The application method is as follows: add the synergist to the pesticide dilution solution, mix well, and then apply as a foliar spray.

7. The application according to claim 6, characterized in that, The volume concentration of the synergist in the final applied solution is 0.1% to 1.0%.

8. The application according to claim 5, characterized in that, The pesticide is an insecticide, fungicide, or herbicide.

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