A herbicide composition with reduced dosage and increased efficiency and its use in controlling weeds in corn fields

Abstract

The present invention discloses a dosage-reducing and synergistic herbicide composition and use thereof in controlling weeds in corn fields, belonging to the technical field of agricultural chemistry. The herbicide composition comprises the following raw materials, measured in percentage by weight: 18-20 wt% of mesotrione, 2-8 wt% of seaweed extract, 1-3 wt% of sulfamethoxam, 5-7 wt% of a filler, 5-15 wt% of a surfactant, and the balance being a solvent. Through the synergistic effect between the raw material components defined in the present invention, a small amount of the herbicide composition can be applied to effectively control weeds in corn fields and reduce pollution to the environment, and further increase corn yield, thus achieving the purpose of dosage-reduction and synergistic effect. This further proves that the herbicide composition of the present invention has excellent prospects for use in weed control.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural chemistry, and in particular relates to a herbicide composition with reduced dosage and increased efficacy and its use in preventing and controlling weeds in corn fields. Background Art

[0002] Corn is one of my country's most important food crops, widely grown across the country. However, the growth of weeds in corn fields seriously impacts corn yield and quality. While traditional herbicides can control weeds to a certain extent, they pose challenges such as high dosage, severe environmental pollution, and the development of resistance.

[0003] Commonly used herbicides on the market today primarily include selective herbicides (such as atrazine and nicosulfuron) and non-selective herbicides (such as glyphosate). While these herbicides have some weed control effects, long-term use can easily lead to weed resistance and negatively impact the environment and non-target plants. Furthermore, existing herbicides also present the following problems:

[0004] 1. Traditional herbicides require large amounts of water, which increases farmers' production costs and pollutes the soil, water, and air.

[0005] 2. Long-term use of a single herbicide can easily lead to weed resistance, reducing the effectiveness of the herbicide;

[0006] 3. Traditional herbicides are toxic to non-target plants (such as corn itself), which may affect the growth and development of corn and reduce its yield and quality.

[0007] Therefore, there is an urgent need to provide a herbicide composition with reduced dosage and increased efficiency, which can reduce production costs and pollution while increasing corn yield. Summary of the Invention

[0008] In response to the above technical problems, the present invention provides a herbicide composition with reduced dosage and increased efficacy and its use in preventing and controlling weeds in corn fields.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] One of the technical solutions of the present invention:

[0011] A herbicide composition with reduced dosage and increased efficacy, comprising the following raw materials, calculated by weight percentage:

[0012] 18-20 wt% of mesotrione, 2-8 wt% of seaweed extract, 1-3 wt% of sulfamethoxam, 5-7 wt% of filler, 5-15 wt% of surfactant, and the balance is solvent.

[0013] Beneficial effects: The above-mentioned herbicide composition defined by the present invention can not only effectively control weeds in corn fields, but also reduce the amount of herbicides used, reduce environmental pollution, and meet the development requirements of green agriculture. Among them, mesotrione is a systemic selective herbicide that mainly inhibits the activity of hydroxyphenylpyruvate dioxygenase (HPPD) to prevent the synthesis of carotenoids in plants, resulting in damage to plant cell membranes and ultimately killing weeds. It has high selectivity for corn and can effectively control weeds without causing obvious drug damage to corn. In addition, when compounded with other herbicides such as sulfamethoxam, mesotrione can enhance the killing effect on stubborn weeds, reduce the amount of a single herbicide used, and delay the development of weed resistance. The seaweed extract obtained by the preparation method of the present invention is rich in a variety of bioactive ingredients, such as polysaccharides, amino acids, minerals, vitamins, etc., which can promote plant growth and development and enhance the stress resistance of crops. In addition, certain components in the seaweed extract can regulate the physiological metabolism of plants, enhance corn's tolerance to herbicides, reduce the damage of herbicides to corn, and ensure that corn is safe during the weeding process. Normal growth; Sulfonamide is a sulfonylurea herbicide, which mainly inhibits the synthesis of branched-chain amino acids by inhibiting acetolactate synthase in plants, thereby blocking protein synthesis in plants and ultimately leading to plant death, that is, Sulfonamide has good control effects on a variety of annual and perennial broad-leaved weeds and some grass weeds; and it can be used in combination with mesotrione to significantly synergistically improve the herbicide effect, expand the control spectrum, and reduce the risk of resistance development; the main function of the filler is to serve as a carrier to help the active ingredients of the herbicide to be evenly dispersed in the preparation, and it also has a certain stabilizing effect, which can extend the storage period of the preparation and prevent the active ingredients from decomposing or failing; the surfactant reduces the surface tension, enhances the permeability and adhesion of the herbicide, reduces drift, and improves the application effect; the solvent acts as a dissolving medium to ensure the uniform distribution and good fluidity of the active ingredient, thereby improving the effect of the herbicide. In summary, the present invention synergistically plays the role of reducing the amount and increasing the effect through the interaction between the above-mentioned raw materials.

[0014] In a preferred embodiment, a herbicide composition with reduced dosage and increased efficacy comprises the following raw materials in percentage by weight:

[0015] 20 wt% of mesotrione, 8 wt% of seaweed extract, 3 wt% of sulfamethoxam, 7 wt% of filler, 15 wt% of surfactant, and the balance is solvent.

[0016] In another preferred embodiment, a herbicide composition with reduced dosage and increased efficacy comprises the following raw materials in percentage by weight:

[0017] 19wt% mesotrione, 6wt% seaweed extract, 2wt% sulfamethoxam, 6wt% filler, 11wt% surfactant, and the balance is solvent.

[0018] In another preferred embodiment, a herbicide composition with reduced dosage and increased efficacy comprises the following raw materials in percentage by weight:

[0019] 18wt% mesotrione, 2wt% seaweed extract, 1wt% sulfamethoxam, 5wt% filler, 5wt% surfactant, and the balance is solvent.

[0020] Optionally, the preparation process of the seaweed extract is:

[0021] The seaweed is washed, dried and crushed, and then a microwave-assisted extraction method is used to obtain the seaweed extract.

[0022] Furthermore, the specific process of the microwave-assisted extraction method is as follows:

[0023] Add the crushed seaweed powder into water at a material-liquid ratio of 1g:10-20mL;

[0024] The mixture was placed in a microwave reactor, and the microwave power was set to 300-800 W and the microwave time was 1-10 minutes;

[0025] The seaweed extract containing effective ingredients is obtained by filtering after microwave treatment.

[0026] Optionally, the filler comprises a diatomaceous earth-white carbon black-urea composite, wherein the mass ratio of diatomaceous earth, white carbon black and urea is 3-6:2-5:4.

[0027] Beneficial effects: The present invention defines the diatomaceous earth-white carbon black-urea composite as a filler in the herbicide, which has the following advantages:

[0028] 1. Enhance adhesion and permeability: The porous structure and dispersibility of diatomaceous earth and silica can improve the adhesion of herbicides on plant surfaces, while urea promotes the absorption of herbicides by weeds;

[0029] 2. Improve fluidity: The combination of diatomaceous earth and silica can prevent the active ingredients from agglomerating or settling, while urea adjusts the viscosity of the formulation to ensure moderate fluidity of the spray liquid;

[0030] 3. Improve stability and weather resistance: Diatomaceous earth and white carbon black can protect the active ingredients and prevent them from becoming ineffective due to environmental factors. Urea adjusts the pH value and further improves the chemical stability of the preparation.

[0031] 4. Environmentally friendly: Natural ingredients and biodegradable materials make the compound environmentally friendly and meet the requirements of green agriculture;

[0032] 5. Delaying weed resistance: The synergistic effect of multiple components can change the growth environment and metabolic pathways of weeds, delaying the development of weed resistance;

[0033] 6. Economical and efficient: Low-cost and multifunctional compounds improve the cost-effectiveness of products and reduce production costs.

[0034] In summary, the composite material under the ratio defined in the present invention can not only improve the effect of the herbicide, but also reduce environmental pollution, which meets the requirements of sustainable development of modern agriculture.

[0035] Furthermore, the filler includes a diatomaceous earth-white carbon black-urea composite, wherein the mass ratio of diatomaceous earth, white carbon black and urea is 6:5:4.

[0036] Optionally, the surfactant includes sodium alkylbenzene sulfonate or fatty alcohol polyoxyethylene ether.

[0037] Optionally, the solvent includes any one of ethyl acetate, butyl acetate, methyl ethyl ketone, soybean oil or rapeseed oil.

[0038] The second technical solution of the present invention:

[0039] The preparation method of the above-mentioned herbicide composition comprises the following steps:

[0040] The raw materials are mixed uniformly according to the above dosage ratio to obtain the herbicide composition.

[0041] The third technical solution of the present invention:

[0042] Application of the above-mentioned herbicide composition in the field of preventing and controlling weeds in corn fields.

[0043] Optionally, the application amount of the herbicide composition is 30-35 g / mu.

[0044] Compared with the prior art, the present invention has the following advantages and technical effects:

[0045] Through the compounding effect between the raw materials defined in the present invention, it is possible to reduce the amount of herbicide used while improving the weed control effect, reducing environmental pollution, delaying the development of weed resistance, and having good safety for non-target plants such as corn, and further increasing corn yield. DETAILED DESCRIPTION

[0046] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0047] It should be understood that the terms described herein are intended only to describe particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges herein, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any intermediate value within a stated value or stated range and any other stated value or intermediate value within the stated range is also encompassed by the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0048] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0049] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be illustrative only.

[0050] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0051] The raw materials used in the present invention are all purchased from the market.

[0052] The technical solution of the present invention is further illustrated by the following examples.

[0053] Example 1

[0054] A herbicide composition with reduced dosage and increased efficacy, comprising the following raw materials, calculated by weight percentage:

[0055] 20 wt% mesotrione, 8 wt% seaweed extract, 3 wt% sulfamethoxam, 7 wt% diatomaceous earth-silica-urea complex (mass ratio of 6:5:4), 15 wt% surfactant (sodium alkylbenzene sulfonate), and the balance solvent (ethyl acetate); then, the above raw materials are mixed uniformly to obtain a herbicide composition;

[0056] The preparation process of seaweed extract is as follows:

[0057] Wash the seaweed, then dry and crush it;

[0058] Add the crushed seaweed powder into water at a material-liquid ratio of 1 g:15 mL;

[0059] The mixture was placed in a microwave reactor, and the microwave power was set to 600 W and the microwave time was set to 5 minutes;

[0060] The mixture is treated with microwaves and filtered to obtain an extract containing effective ingredients.

[0061] Example 2

[0062] The difference from Example 1 is that the raw material ratio is:

[0063] 19 wt% mesotrione, 6 wt% seaweed extract, 2 wt% sulfasulfuron-methyl, 6 wt% diatomaceous earth-silica-urea complex (mass ratio of 6:5:4), 11 wt% surfactant (sodium alkylbenzene sulfonate), and the balance solvent (ethyl acetate) were then mixed to obtain a herbicide composition. Other conditions were the same as in Example 1.

[0064] Example 3

[0065] The difference from Example 1 is that the raw material ratio is:

[0066] A herbicide composition with reduced dosage and increased efficacy, comprising the following raw materials, calculated by weight percentage:

[0067] 18 wt% mesotrione, 2 wt% seaweed extract, 1 wt% sulfamethoxam, 5 wt% diatomaceous earth-silica-urea complex (mass ratio of 6:5:4), 5 wt% surfactant (sodium alkylbenzene sulfonate), and the balance solvent (ethyl acetate) were mixed to obtain a herbicide composition. Other conditions were the same as in Example 1.

[0068] Example 4

[0069] The difference from Example 1 is that

[0070] The diatomaceous earth-white carbon black-urea composite material has a mass ratio of diatomaceous earth, white carbon black and urea of ​​5:5:4. Other conditions are the same as those in Example 1.

[0071] Example 5

[0072] The difference from Example 1 is that

[0073] The diatomite-white carbon black-urea composite material has a mass ratio of diatomite, white carbon black and urea of ​​3:5:4. Other conditions are the same as those in Example 1.

[0074] Example 6

[0075] The difference from Example 1 is that

[0076] The preparation process of seaweed extract is as follows:

[0077] Wash the seaweed, then dry and crush it;

[0078] Add the crushed seaweed powder into water at a material-liquid ratio of 1 g:10 mL;

[0079] The mixture was placed in a microwave reactor, and the microwave power was set to 800 W and the microwave time was set to 8 minutes;

[0080] The mixture is treated with microwaves and filtered to obtain an extract containing effective ingredients.

[0081] Other conditions are the same as in Example 1.

[0082] Comparative Example 1

[0083] The difference from Example 1 is that sulfamethoxam is not included in the raw materials. Other conditions are the same as those in Example 1.

[0084] Comparative Example 2

[0085] The difference from Example 1 is that the raw materials do not include seaweed extract. Other conditions are the same as those in Example 1.

[0086] Comparative Example 3

[0087] The difference from Example 1 is that no filler is added to the raw materials. Other conditions are the same as those in Example 1.

[0088] Comparative Example 4

[0089] The difference from Example 1 is that the filler in the raw material is a silica-urea composite (mass ratio is 5:4). Other conditions are the same as those in Example 1.

[0090] Comparative Example 5

[0091] The difference from Example 1 is that the filler in the raw material is a diatomaceous earth-urea composite (mass ratio is 6:4). Other conditions are the same as those in Example 1.

[0092] Effect verification

[0093] Using a backpack sprayer, the herbicides described in Examples 1-6 and Comparative Examples 1-5 were evenly sprayed in corn fields in each planting area at the 3-5 leaf stage using a spray rate of 35 g / mu. A water blank control was also provided. Aside from applying the herbicides as described above, all other planting conditions in each planting area were identical. Forty-five days after spraying, weeds in the planting areas were identified and counted. Yield statistics were collected at harvest time, as detailed in Table 1.

[0094] Note: Plant control efficiency = (number of weeds in the blank treatment planting area - number of weeds in the herbicide treatment planting area) / number of weeds in the blank treatment planting area × 100%.

[0095] Corn yield improvement rate = (corn yield in the herbicide-treated planting area - corn yield in the blank-treated planting area) / corn yield in the blank-treated planting area × 100%.

[0096] Table 1

[0097] Plant control efficacy (%) Corn yield increase rate (%) Example 1 93.4 56.1 Example 2 92.5 53.8 Example 3 89.1 53.4 Example 4 88.9 52.8 Example 5 86.5 51.7 Example 6 86.8 50.5 Comparative Example 1 68.2 21.5 Comparative Example 2 69.4 23.1 Comparative Example 3 65.7 22.6 Comparative Example 4 70.1 26.3 Comparative Example 5 69.8 25.8

[0098] Conclusion: Comparison of the data from Examples 1-6 and Comparative Examples 1-5 demonstrates that the sulfasulfuron-methyl, seaweed extract, and mesotrione in the herbicide of the present invention exhibit a synergistic effect, not only enhancing weed control but also reducing herbicide usage, delaying the development of weed resistance, and further increasing corn yield. Furthermore, the filler composite of diatomaceous earth, silica, and urea, defined in the present invention, can alter the growth environment and metabolic pathways of weeds through the synergistic action of the three components, thereby enhancing weed control.

[0099] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A herbicide composition with reduced dosage and increased efficacy, characterized in that: According to weight percentage, it includes the following raw materials: 18-20wt% mesotrione, 2-8wt% seaweed extract, 1-3wt% sulfamethoxam, 5-7wt% filler, 5-15wt% surfactant, and the balance is solvent; The preparation process of the seaweed extract is as follows: The seaweed is washed, dried, and crushed; then, microwave-assisted extraction is performed by adding the crushed seaweed powder to water at a material-liquid ratio of 1 g:10-20 mL; the mixture is placed in a microwave reactor, the microwave power is set to 300-800 W, and the microwave time is set to 1-10 minutes; after microwave treatment, the seaweed extract is filtered to obtain the seaweed extract; The filler comprises a diatomaceous earth-white carbon black-urea composite, wherein the mass ratio of diatomaceous earth, white carbon black and urea is 3-6:2-5:4; The surfactant is sodium alkylbenzene sulfonate; The solvent is ethyl acetate.

2. A herbicide composition with reduced dosage and increased synergy according to claim 1, characterized in that: According to weight percentage, it includes the following raw materials: 20wt% mesotrione, 8wt% seaweed extract, 3wt% sulfamethoxam, 7wt% filler, 15wt% surfactant, and the balance is solvent.

3. A herbicide composition with reduced dosage and increased synergy according to claim 1, characterized in that: According to weight percentage, it includes the following raw materials: 19wt% mesotrione, 6wt% seaweed extract, 2wt% sulfamethoxam, 6wt% filler, 11wt% surfactant, and the balance is solvent.

4. A herbicide composition with reduced dosage and increased synergy according to claim 1, characterized in that: According to weight percentage, it includes the following raw materials: 18wt% mesotrione, 2wt% seaweed extract, 1wt% sulfamethoxam, 5wt% filler, 5wt% surfactant, and the balance is solvent.

5. Use of the herbicide composition according to any one of claims 1 to 4 in controlling weeds in corn fields.

6. The use according to claim 5, characterized in that The application amount of the herbicide composition is 30-35 g / mu.