Reduced and synergistic herbicide composition and application thereof in prevention and control of weeds in corn field

Abstract

The invention discloses a decrement and synergistic herbicide composition and application thereof in prevention and control of weeds in corn fields, and belongs to the technical field of agrochemistry, the herbicide composition comprises the following raw materials by weight: 18-20 wt% of mesotrione, 2-8 wt% of a seaweed extract, 1-3 wt% of rimsulfuron, 5-7 wt% of a filler, 5-15 wt% of a surfactant, and the balance of water. The balance is a solvent; through the synergistic effect of all the raw material components limited by the invention, the effects of effectively preventing and treating weed damage in corn fields and reducing environmental pollution can be achieved by applying a small amount of the herbicide composition, and the corn yield is further improved, namely the purposes of reducing the amount and improving the efficiency are achieved; it is further proved that the herbicide composition has an excellent weed control application prospect.

Description

Technical Field

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

[0002] Corn is one of the important food crops in my country and is widely planted throughout the country. However, the growth of weeds in corn fields seriously affects the yield and quality of corn. Although traditional herbicides can control weeds to a certain extent, they have problems such as large dosage, serious environmental pollution, and prominent drug resistance.

[0003] Commonly used herbicides on the market include selective herbicides (such as atrazine, nicosulfuron, etc.) and non-selective herbicides (such as glyphosate). Although these herbicides have a certain weed control effect, they are prone to cause weed resistance after long-term use, and have adverse effects on the environment and non-target plants. In addition, existing herbicides have the following problems:

[0004] 1. Traditional herbicides are used in large quantities, which increases farmers' production costs and also 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 the yield and quality of corn.

[0007] Therefore, there is an urgent need to provide a herbicide composition with reduced dosage and increased efficiency. On the one hand, a small amount of herbicide can reduce production costs and pollution, and on the other hand, it can also increase corn yield. Summary of the invention

[0008] In view of the above technical problems, the present invention proposes a herbicide composition with reduced dosage and increased efficiency 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 in terms of weight percentage:

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

[0013] Beneficial effects: The above-mentioned herbicide composition defined in 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, which mainly inhibits the activity of hydroxyphenylpyruvate dioxygenase (HPPD), prevents the synthesis of carotenoids in plants, causes damage to plant cell membranes, and ultimately kills weeds. It has high selectivity for corn and can effectively control weeds without causing obvious phytotoxicity 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 biologically active 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 in the weeding process. Normal growth; Sulfonsulfuron 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 eventually leading to plant death, that is, Sulfonsulfuron 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 weed control 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 is used as a dissolving medium to ensure the uniform distribution and good fluidity of the active ingredients, and improves the effect of the herbicide. In summary, the present invention synergistically plays the role of reducing the amount and increasing the efficiency 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 terms of weight percentage:

[0015] 20wt% mesotrione, 8wt% seaweed extract, 3wt% sulfasulfuron-methyl, 7wt% filler, 15wt% 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 terms of weight percentage:

[0017] 19wt% mesotrione, 6wt% seaweed extract, 2wt% sulfasulfuron-methyl, 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 terms of weight percentage:

[0019] 18wt% mesotrione, 2wt% seaweed extract, 1wt% sulfasulfuron-methyl, 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 the seaweed extract is obtained by microwave-assisted extraction.

[0022] Further, the specific process of the microwave-assisted extraction method is:

[0023] Add the crushed seaweed powder into water at a solid-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 set to 1-10 minutes;

[0025] The microwave treatment is followed by filtration to obtain the seaweed extract containing effective ingredients.

[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 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 white carbon black can improve the adhesion of herbicides on the plant surface, while urea promotes the absorption of herbicides by weeds;

[0029] 2. Improve fluidity: The combination of diatomaceous earth and white carbon black can prevent the active ingredients from agglomerating or settling, and urea adjusts the viscosity of the preparation to ensure that the fluidity of the spray liquid is moderate;

[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 degradable 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 specified 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] According to the above dosage ratio, the raw materials are mixed evenly to obtain the herbicide composition.

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

[0042] Application of the above 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, the herbicide dosage can be reduced while improving the weed control effect, reducing environmental pollution, delaying the development of weed resistance, having good safety for non-target plants such as corn, and further increasing the yield of corn. 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 should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

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

[0048] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation 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 a conflict with any incorporated document, the content 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 of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary 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 embodiments.

[0053] Example 1

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

[0055] 20wt% mesotrione, 8wt% seaweed extract, 3wt% sulfasulfuron-methyl, 7wt% diatomaceous earth-white carbon black-urea complex (mass ratio is 6:5:4), 15wt% surfactant (sodium alkylbenzene sulfonate), and the remainder is 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 pulverize it;

[0058] Add the crushed seaweed powder into water at a solid-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] After microwave treatment, the mixture is 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] 19wt% mesotrione, 6wt% seaweed extract, 2wt% sulfamethoxam, 6wt% diatomaceous earth-white carbon-urea complex (mass ratio is 6:5:4), 11wt% surfactant (sodium alkylbenzene sulfonate), and the remainder is solvent (ethyl acetate); then the above raw materials are mixed uniformly to obtain a herbicide composition. Other conditions are the same as those 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 in terms of weight percentage:

[0067] 18wt% mesotrione, 2wt% seaweed extract, 1wt% sulfamethoxam, 5wt% diatomaceous earth-white carbon-urea complex (mass ratio is 6:5:4), 5wt% surfactant (sodium alkylbenzene sulfonate), and the remainder is solvent (ethyl acetate); then the above raw materials are mixed uniformly to obtain a herbicide composition. Other conditions are the same as those in Example 1.

[0068] Example 4

[0069] The difference from Example 1 is that

[0070] The diatomite-white carbon black-urea composite material has a mass ratio of diatomite, 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] Diatomaceous earth-white carbon black-urea composite, wherein the mass ratio of diatomaceous earth, white carbon black and urea is 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:

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

[0078] Add the crushed seaweed powder into water at a solid-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] After microwave treatment, the mixture is 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 sulfasulfuron-methyl 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 white carbon black-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 in Examples 1-6 and Comparative Examples 1-5 were evenly sprayed on the corn fields in each planting area at the 3-5 leaf stage of corn at an application rate of 35 g / mu, and a water blank control was set. In addition to applying the herbicides according to the above scheme, the other planting conditions in each planting area were exactly the same. 45 days after spraying the herbicides, the weeds in the planting area were identified and counted. When the corn was harvested, the yield was counted, and the specific data are shown in Table 1.

[0094] Note: Plant control effect = (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: By comparing the data of Examples 1-6 and Comparative Examples 1-5, it can be seen that the sulfasulfuron-methyl, seaweed extract and mesotrione in the herbicide of the present invention play a synergistic role, which can not only improve the weed control effect, but also reduce the amount of herbicide used, delay the development of weed resistance, and further increase the yield of corn. In addition, the filler composite diatomaceous earth-white carbon black-urea with a certain mass ratio specified in the present invention can change the growth environment and metabolic pathway of weeds through the synergistic effect of the three components, thereby improving the weed removal effect.

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

Claims

1. A herbicide composition with reduced dosage and increased efficiency, 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.

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

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

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

5. The herbicide composition with reduced dosage and increased efficiency according to claim 1, characterized in that: The preparation process of the seaweed extract is as follows: The seaweed is washed, dried and crushed; and then the seaweed extract is obtained by microwave-assisted extraction.

6. A herbicide composition with reduced dosage and increased efficiency according to claim 5, characterized in that: The specific preparation process of the microwave-assisted extraction method is as follows: Add the crushed seaweed powder into water at a solid-liquid ratio of 1g:10-20mL; The mixture was placed in a microwave reactor, and the microwave power was set to 300-800 W and the microwave time was set to 1-10 minutes; The seaweed extract is obtained by filtering after microwave treatment.

7. A herbicide composition with reduced dosage and increased efficiency according to claim 1, characterized in that: The filler comprises a diatomaceous earth-white carbon black-urea composite, wherein the mass ratio of the diatomaceous earth, white carbon black and urea is 3-6:2-5:

4.

8. The herbicide composition with reduced dosage and increased efficiency according to claim 1, characterized in that: The surfactant comprises sodium alkylbenzene sulfonate or fatty alcohol polyoxyethylene ether; and / or The solvent includes any one of ethyl acetate, butyl acetate, methyl ethyl ketone, soybean oil or rapeseed oil.

9. Use of the herbicide composition according to any one of claims 1 to 8 in the field of controlling weeds in corn fields.

10. The use according to claim 9, characterized in that: The application amount of the herbicide composition is 30-35 g / mu.