Ternary cotton herbicide and preparation method thereof

Abstract

The invention belongs to the field of herbicides, particularly relates to a ternary cotton herbicide and a preparation method thereof, and provides the following scheme aiming at the problem that the existing ternary cotton herbicide can comprehensively prevent and control various weeds in a cotton field, but is relatively weak in permeability and systemic property, so that the weeding effect is limited. The ternary cotton herbicide is prepared from the following raw materials in parts by weight: 27-35 parts of prometryn, 46-50 parts of pendimethalin, 1-3 parts of flumioxazin, 30-35 parts of a solvent, 8-12 parts of an emulsifier, 0.5-1.5 parts of a stabilizer, 0.8-1.2 parts of an antiquing additive and 50-55 parts of water.The ternary cotton herbicide can be used for more comprehensively preventing and controlling various weeds, and meanwhile, the permeability and systemic property of the herbicide are enhanced; the weeding range is wide, the weeding effect is thorough, and the cotton growth is not affected especially for preventing and killing weeds such as solanum nigrum, chenopodium glaucum and convolvulus arvensis.

Description

Technical Field

[0001] The present invention relates to the technical field of herbicides, and particularly to a ternary cotton herbicide and a preparation method thereof; especially a method for controlling weeds in pre-emergence soil sealing of cotton fields. Background Art

[0002] The ternary cotton herbicide is a new type of herbicide combination composed of three herbicides with different action mechanisms; through the synergistic effect of the three herbicides, the ternary cotton herbicide can more comprehensively control various weeds in cotton fields, significantly reduce the impact of weeds on cotton growth, and create a better environment for cotton growth.

[0003] Although the existing ternary cotton herbicides can comprehensively control various weeds in cotton fields, their permeability and systemicity are weak, resulting in limited herbicidal effects. Therefore, we propose a ternary cotton herbicide and a preparation method thereof to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages that although the existing ternary cotton herbicides can comprehensively control various weeds in cotton fields, their permeability and systemicity are weak, resulting in limited herbicidal effects, and to propose a ternary cotton herbicide and a preparation method thereof.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A ternary cotton herbicide, comprising the following raw materials in parts by weight: Prometryn 27 - 35 parts, Pendimethalin 46 - 50 parts, Flumioxazin 1 - 3 parts, Solvent 30 - 35 parts, Emulsifier 8 - 12 parts, Stabilizer 0.5 - 1.5 parts, Penetration Aid 0.8 - 1.2 parts, Water 50 - 55 parts.

[0006] Preferably, it comprises the following raw materials in parts by weight: Prometryn 28 - 34 parts, Pendimethalin 47 - 49 parts, Flumioxazin 1 - 2 parts, Solvent 31 - 34 parts, Emulsifier 9 - 11 parts, Stabilizer 0.8 - 1.2 parts, Penetration Aid 0.9 - 1.1 parts, Water 51 - 54 parts.

[0007] Preferably, it comprises the following raw materials in parts by weight: Prometryn 30 parts, Pendimethalin 48 parts, Flumioxazin 1.5 parts, Solvent 33 parts, Emulsifier 10 parts, Stabilizer 1 part, Penetration Aid 1 part, Water 53 parts.

[0008] Preferably, the solvent is N,N - Dimethylformamide and Urea, and the mass ratio of N,N - Dimethylformamide to Urea is: 10 - 15:4 - 6.

[0009] Preferably, the emulsifier is an anionic emulsifier.

[0010] Preferably, the stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is 3 - 7:5 - 8.

[0011] The present invention also provides a preparation method of a ternary cotton herbicide, comprising the following steps: S1: Mix the measured water and solvent evenly to obtain mixture A. S2: Add the measured prometryn, pendimethalin and flumioxazin to mixture A and mix evenly to obtain mixture B. S3: Add the measured emulsifier, stabilizer and penetration enhancer to mixture B and mix evenly to prepare the ternary cotton herbicide.

[0012] Preferably, in S1, the measured water and solvent are mixed and stirred for 1 - 2 hours to obtain mixture A.

[0013] Preferably, in S2, the measured prometryn, pendimethalin and flumioxazin are added to mixture A and mixed and stirred at 50 - 60 °C for 3 - 5 hours to obtain mixture B.

[0014] Preferably, in S3, the measured emulsifier, stabilizer and penetration enhancer are added to mixture B and mixed and stirred at 70 - 80 °C for 2 - 3 hours to prepare the ternary cotton herbicide.

[0015] In the present invention, the beneficial effects of the ternary cotton herbicide and its preparation method are as follows: In this solution, flumioxazin has a significant contact-killing effect. As a contact-type selective herbicide, once it is sprayed on the leaves of weeds, it can be quickly absorbed by sensitive weed tissues. This absorption will cause the weeds to wilt, turn white, dry out, and finally turn yellow and wither; the contact-killing effect of flumioxazin is usually very rapid, and obvious poisoning symptoms such as wilting and whitening will appear in sensitive weeds within 12 to 48 hours after application, until necrosis and withering; the compound use of flumioxazin and prometryn can achieve the combination of quick effect and long-lasting effect, and also has a good effect on resistant weeds; such a compounding can more comprehensively control various weeds, improve the efficiency and persistence of weed control; to improve the closed effect, flumioxazin is mixed with pendimethalin; such a compounding can more comprehensively control various weeds, and at the same time enhance the permeability and systemicity of the medicament; In this solution, the penetration enhancer can improve the absorption of the herbicide, and the penetration enhancer can increase the permeability of the medicament, thus helping the herbicide to be better absorbed; In this solution, adding dimethylformamide can help with dilution and mixing, thereby enhancing the effectiveness of the herbicide; adding urea can, after the weeds come into contact with the urea solution, promote photosynthesis, making it easier for the weeds to absorb prometryn, thus improving the herbicidal effect; meanwhile, urea can also soften the waxy layer on the weed leaves, allowing the herbicide to better penetrate into the interior of the weeds. In this solution, adding an anionic emulsifier, the anionic emulsifier with a negative charge can combine with the herbicide molecules with a positive charge to form a stable emulsion, enabling it to have strong dispersion and penetration capabilities, which helps the herbicide quickly enter the weeds, thereby improving the herbicidal effect. In this solution, adding hydroquinone and terephthalic acid can absorb ultraviolet light, preventing the herbicide from being degraded by ultraviolet light, and at the same time stabilizing the acidity and alkalinity of the solution. This stabilizing effect helps maintain the activity of the herbicide during storage and use, thereby indirectly increasing the absorption rate of the herbicide.

[0016] The present invention can more comprehensively control various weeds, while enhancing the permeability and systemicity of the medicament; it has a wide weeding area and a thorough weeding effect, especially for the control of weeds such as Solanum nigrum, Chenopodium album, and Convolvulus arvensis, without affecting the growth of cotton. Specific Embodiments

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Example 1

[0018] A ternary cotton herbicide comprises the following raw materials in parts by weight: 27 parts of prometryn, 46 parts of pendimethalin, 1 part of flumioxazin, 30 parts of solvent, 8 parts of emulsifier, 0.5 part of stabilizer, 0.8 part of penetration aid, and 50 parts of water; the solvent is dimethylformamide and urea, and the mass ratio of dimethylformamide to urea is 10:4; the emulsifier is an anionic emulsifier; the stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is 3:5; Its preparation method comprises the following steps: S1: Mix and stir the measured water and solvent for 1 hour to obtain mixture A; S2: Add the measured prometryn, pendimethalin, and flumioxazin to mixture A, mix and stir, and stir at 50 °C for 3 hours to obtain mixture B; S3: Add the measured emulsifier, stabilizer, and penetration aid to mixture B, mix and stir, and stir at 70 °C for 2 hours to prepare the ternary cotton herbicide. Example 2

[0019] A ternary cotton herbicide, comprising the following raw materials in parts by weight: Prometryn 28 parts, Pendimethalin 47 parts, Flumioxazin 1 part, solvent 31 parts, emulsifier 9 parts, stabilizer 0.8 part, penetration aid 0.9 part, water 51 parts; the solvent is dimethylformamide and urea, and the mass ratio of dimethylformamide to urea is: 11:5; the emulsifier is an anionic emulsifier; the stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is: 4:6; Its preparation method comprises the following steps: S1: Mix and stir the measured water and solvent, stir for 1.2 hours to obtain mixture A; S2: Add the measured Prometryn, Pendimethalin and Flumioxazin to mixture A, mix and stir, and stir at 52 °C for 3.5 hours to obtain mixture B; S3: Add the measured emulsifier, stabilizer and penetration aid to mixture B, mix and stir, and stir at 72 °C for 2.2 hours to prepare the ternary cotton herbicide. Example 3

[0020] A ternary cotton herbicide, comprising the following raw materials in parts by weight: Prometryn 30 parts, Pendimethalin 48 parts, Flumioxazin 1.5 parts, solvent 33 parts, emulsifier 10 parts, stabilizer 1 part, penetration aid 1 part, water 53 parts; the solvent is dimethylformamide and urea, and the mass ratio of dimethylformamide to urea is: 13:5; the emulsifier is an anionic emulsifier; the stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is: 5:6; Its preparation method comprises the following steps: S1: Mix and stir the measured water and solvent, stir for 1.5 hours to obtain mixture A; S2: Add the measured Prometryn, Pendimethalin and Flumioxazin to mixture A, mix and stir, and stir at 55 °C for 4 hours to obtain mixture B; S3: Add the measured emulsifier, stabilizer and penetration aid to mixture B, mix and stir, and stir at 75 °C for 2.5 hours to prepare the ternary cotton herbicide. Example 4

[0021] A ternary cotton herbicide, comprising the following raw materials in parts by weight: 34 parts of promethazine, 49 parts of pendimethalin, 2 parts of fluazifop-propyl, 34 parts of solvent, 11 parts of emulsifier, 1.2 parts of stabilizer, 1.1 parts of antoin, and 54 parts of water; the solvent is dimethylformamide and urea, and the mass ratio of dimethylformamide to urea is 14:5; the emulsifier is an anionic emulsifier; the stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is 6:7; The preparation method thereof comprises the following steps: S1: Mix and stir the measured water and solvent for 1.8 hours until the mixture A is obtained; S2: adding measured amounts of prometryn, pendimethalin and fluazifop-butyl to mixture A, mixing and stirring, and stirring at 58° C. for 4.5 hours to obtain mixture B; S3: Add measured emulsifier, stabilizer and anto aid to mixture B, mix and stir, and stir at 78° C. for 2.8 hours to obtain a ternary cotton herbicide. Embodiment 5

[0022] A ternary cotton herbicide comprises the following raw materials in parts by weight: 35 parts of promethazine, 50 parts of pendimethalin, 3 parts of fluazifop-butyl, 35 parts of solvent, 12 parts of emulsifier, 1.5 parts of stabilizer, 1.2 parts of antoin, and 55 parts of water; the solvent is dimethylformamide and urea, and the mass ratio of dimethylformamide to urea is 15:6; the emulsifier is an anionic emulsifier; the stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is 7:8; The preparation method thereof comprises the following steps: S1: Mix and stir the measured water and solvent for 2 hours until the mixture A is obtained; S2: adding measured amounts of prometryn, pendimethalin and fluazifop-butyl to mixture A, mixing and stirring, and stirring at 60° C. for 5 hours to obtain mixture B; S3: Add measured emulsifier, stabilizer and anto aid to mixture B, mix and stir, and stir at 80° C. for 3 hours to obtain a ternary cotton herbicide.

[0023] The ternary cotton herbicides prepared in Examples 1 to 5 were tested for weed control in cotton fields, and the test results were as follows: Example Dosage (ml / mu) Effective duration Total weed control efficacy Example 1 200 10 - 12 weeks 92.7 Example 2 200 9 - 11 weeks 93.5 Example 3 200 13 - 15 weeks 98.9 Example 4 200 11 - 13 weeks 95.6 Example 5 200 8 - 12 weeks 94.5 It can be clearly seen from the above table that this solution can more comprehensively control various weeds while enhancing the permeability and systemicity of the agent, and embodiment 3 is the best embodiment.

[0024] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A ternary cotton herbicide, characterized in that: The invention comprises the following raw materials in parts by weight: 27-35 parts of prometryn, 46-50 parts of pendimethalin, 1-3 parts of fluazifop-propyl, 30-35 parts of solvent, 8-12 parts of emulsifier, 0.5-1.5 parts of stabilizer, 0.8-1.2 parts of antoin, and 50-55 parts of water.

2. A ternary cotton herbicide according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 28-34 parts of promethazine, 47-49 parts of pendimethalin, 1-2 parts of fluazifop-propyl, 31-34 parts of solvent, 9-11 parts of emulsifier, 0.8-1.2 parts of stabilizer, 0.9-1.1 parts of antoin, and 51-54 parts of water.

3. A ternary cotton herbicide according to claim 2, characterized in that: The invention comprises the following raw materials in parts by weight: 30 parts of prometryn, 48 parts of pendimethalin, 1.5 parts of fluazifop-propyl, 33 parts of solvent, 10 parts of emulsifier, 1 part of stabilizer, 1 part of antoin, and 53 parts of water.

4. A ternary cotton herbicide according to claim 1, characterized in that: The solvent is dimethylformamide and urea, and the mass ratio of dimethylformamide to urea is: 10-15:4-6.

5. A ternary cotton herbicide according to claim 1, characterized in that: The emulsifier is an anionic emulsifier.

6. A ternary cotton herbicide according to claim 1, characterized in that: The stabilizer is hydroquinone and terephthalic acid, and the mass ratio of hydroquinone to terephthalic acid is 3-7:5-8.

7. A method for preparing a ternary cotton herbicide, characterized in that: The following steps are involved: S1: Mix the measured water and solvent evenly until the mixture is A; S2: adding measured amounts of prometryn, pendimethalin and fluazifop-butyl to the mixture A, and mixing them evenly to obtain a mixture B; S3: Add measured emulsifier, stabilizer and anto aid to mixture B, mix well, and prepare a ternary cotton herbicide.

8. The method for preparing a ternary cotton herbicide according to claim 7, characterized in that: In S1, the measured water and solvent are mixed and stirred for 1-2 hours to obtain a mixture A.

9. The method for preparing a ternary cotton herbicide according to claim 7, characterized in that: In the above S2, measured amounts of prometryn, pendimethalin and fluazifop-butyl are added to the mixture A, the mixture is mixed and stirred, and stirred at 50-60° C. for 3-5 hours to obtain a mixture B.

10. The method for preparing a ternary cotton herbicide according to claim 7, characterized in that: In the above S3, the measured emulsifier, stabilizer and anto aid are added to the mixture B, the mixture is mixed and stirred, and stirred at 70-80° C. for 2-3 hours to obtain a ternary cotton herbicide.