Assistant for killing glyphosate resistant weeds and preparation method thereof

Abstract

The invention belongs to the technical field of pesticide adjuvants, and particularly relates to an adjuvant for killing glyphosate-resistant weeds and a preparation method of the adjuvant. The auxiliary agent is prepared by mixing the following raw materials: 1 to 20 percent of fatty alcohol polyoxyethylene ether sodium sulfate, 5 to 25 percent of sodium lauroyl sarcosinate, 5 to 30 percent of cocamidopropyl betaine, 10 to 30 percent of isomeric alkyl glycoside, 0.1 to 2 percent of plant growth regulator, 0.1 to 1.0 percent of polyether modified trisiloxane, 2.0 to 6.0 percent of ammonium sulfate, 0.1 to 1.0 percent of penetrant and the balance of water. According to the invention, the lowest critical micelle concentration of the glyphosate assistant in the preparation is determined by researching the hydrophilic-lipophilic ratio of various surfactants and the interaction parameter beta value among surfactant molecules in the compounded assistant and continuously optimizing and exploring, so that the surface tension of the herbicide liquid is obviously reduced, and the herbicide effect is improved. Compared with the prior art, the herbicide has the advantages that the adhesion amount of the herbicide on leaves is increased, the drug absorption is increased by 0.7-1.5 times, the synergistic effect is achieved, meanwhile, the plant growth regulator is added into the auxiliary agent, the expression of shikimic acid pathways in resistant weeds is interfered, and under the condition that the drug use cost and the drug use amount are not increased, the herbicide can easily penetrate through plant epidermis, so that the weed resistance is improved. Therefore, the biological activity of the pesticide is improved, and the effect of killing resistant weeds is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pesticide adjuvants, and particularly relates to an adjuvant for killing glyphosate-resistant weeds and a preparation method thereof. Background Art

[0002] Due to the long-term and repeated use of glyphosate, dozens of weeds have developed resistance to it. For example, the glyphosate-resistant Conyza canadensis and Eleusine indica in China have become thorny problems in the process of orchard and vegetable planting. On the one hand, the existing non-selective herbicide adjuvants have low activity and poor wetting and penetration, resulting in an increase in the dosage of herbicides per unit area. At the same time, the amount of herbicide received by weeds is not large, resulting in a large amount of the agent being scattered into the soil, which will also cause environmental pollution. On the other hand, a small amount of the herbicide component absorbed by weeds is offset by the increased expression of the glyphosate target enzyme in resistant weeds, resulting in a significant reduction in the herbicidal activity of glyphosate. Therefore, how to improve the activity of non-selective herbicides and solve the problem of resistant weeds has become an important issue in the industry development. Summary of the Invention

[0003] The purpose of the present invention is to provide an adjuvant for killing glyphosate-resistant weeds and a preparation method thereof.

[0004] To achieve the above purpose, the technical scheme adopted by the present invention is: An adjuvant for killing glyphosate-resistant weeds, which is mixed by the following raw materials: 1-20% of sodium lauryl polyoxyethylene ether sulfate, 5-25% of sodium lauroyl sarcosinate, 5-30% of cocamidopropyl betaine, 10-30% of isomeric alkyl glycoside, 0.1-2% of plant growth regulator, 0.1-1.0% of polyether-modified trisiloxane, 2.0-6.0% of ammonium sulfate, 0.1-1.0% of penetrant, and the balance is water.

[0005] Another purpose of the present invention is to provide a preparation method of an adjuvant for killing glyphosate-resistant weeds, including the following steps: adding water to a blending kettle, starting stirring, adding ammonium sulfate and stirring until dissolved and clear, then adding sodium lauryl polyoxyethylene ether sulfate, stirring evenly, adding isomeric alkyl glycoside and cocamidopropyl betaine, then slowly adding sodium lauroyl sarcosinate and plant growth regulator, and polyether-modified trisiloxane, and finally adding penetrant, stirring evenly to form a light yellow to light brownish red transparent solution, completing the blending, discharging and sealing.

[0006] The advantages of the present invention are as follows: By studying the hydrophilic-lipophilic balance ratio (HLB value) of various surfactants and the interaction parameter β value between surfactant molecules in the formulated auxiliary agent, through continuous optimization and exploration, the minimum critical micelle concentration (CMC) of the glyphosate auxiliary agent in the preparation is determined, significantly reducing the surface tension of the herbicide liquid medicine, increasing the adhesion amount of the herbicide on the leaves, increasing the drug absorption by 0.7 - 1.5 times, achieving a synergistic effect. At the same time, a plant growth regulator is added to the auxiliary agent, interfering with the expression of the shikimic acid pathway in resistant weeds. Without increasing the drug cost and dosage, the herbicide can easily penetrate the plant epidermis and accelerate the conduction of the medicament in the organism, thereby improving the biological activity of the pesticide and achieving the effect of killing resistant weeds. Detailed implementation mode Example

[0007] An auxiliary agent for killing glyphosate-resistant weeds, which is prepared by mixing the following raw materials: 1 - 20% of sodium lauryl polyoxyethylene ether sulfate, 5 - 25% of sodium lauroyl sarcosinate, 5 - 30% of cocoamidopropyl betaine, 10 - 30% of isomeric alkyl glycoside, 0.1 - 2% of plant growth regulator, 0.1 - 1.0% of polyether-modified trisiloxane, 2.0 - 6.0% of ammonium sulfate, 0.1 - 1.0% of penetrant, and the balance is water.

[0008] Another object of the present invention is to provide a preparation method of an auxiliary agent for killing glyphosate-resistant weeds, which includes the following steps: Add water to a blending kettle, start stirring, add ammonium sulfate and stir until dissolved and clear, then add sodium lauryl polyoxyethylene ether sulfate, stir evenly, add isomeric alkyl glycoside and cocoamidopropyl betaine, then slowly add sodium lauroyl sarcosinate and plant growth regulator, and polyether-modified trisiloxane, and finally add penetrant, stir evenly, and it becomes a light yellow to light brownish red transparent solution. After the blending is completed, discharge and seal it.

[0009] During specific use, it is formulated with glyphosate aqueous solution according to the ratio shown in the following table: After being formulated, it can be used at a dosage of 600 ml per mu of land.

Claims

1. An adjuvant for killing glyphosate-resistant weeds, characterized in that, This auxiliary agent is prepared by mixing the following raw materials: 1-20% of sodium lauryl polyoxyethylene ether sulfate, 5-25% of sodium lauroyl sarcosinate, 5-30% of cocoamidopropyl betaine, 10-30% of isomeric alkyl glycoside, 0.1-2% of plant growth regulator, 0.1-1.0% of polyether modified trisiloxane, 2.0-6.0% of ammonium sulfate, 0.1-1.0% of penetrant, and the balance is water.

2. The preparation method of the adjuvant for killing glyphosate-resistant weeds according to claim 1, characterized in that: It includes the following steps: Add water to the blending kettle, start stirring, add ammonium sulfate and stir until dissolved and clear, then add sodium lauryl polyoxyethylene ether sulfate, after stirring evenly, add isomeric alkyl glycoside and cocoamidopropyl betaine, then slowly add sodium lauroyl sarcosinate, plant growth regulator, and polyether modified trisiloxane, and finally add penetrant. After stirring evenly, it becomes a light yellow to light brownish red transparent solution. The blending is completed, and then it can be discharged and sealed.

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