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Preparation method of botanical herbicide water aqua

A technology of botanical herbicides, applied in the field of botanical pesticides, can solve the problems of no botanical herbicides, affecting field operation efficiency, slow powder dissolution, etc., to achieve good promotion and application prospects, good interface wettability, No pesticide residue effect

Inactive Publication Date: 2018-12-14
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problems of the powders mentioned in the above-mentioned patents and papers or the preparation of water preparations from powders are as follows: (1) the water preparations mentioned in the papers are only the solution after stirring and mixing the Sapindus chinensis extract and water. Ineffective components such as free sugar in the extract of Sagittarius are separated and removed. In the experiment, it was found that after the extract containing sugar was mixed with water and placed at room temperature for 2-3 days, colonies would grow, resulting in the instability of the solution. And other issues
(2) The powder contains invalid ingredients such as free sugar. In order to achieve a certain drug effect, it is necessary to increase the dosage of the preparation in production, which affects the operating efficiency in the field; In the case of the soluble powder of the extract of Sagittarius, it was found that the dissolution rate of the powder in water was slow, which seriously affected the work efficiency. The user put forward suggestions to improve the problem of the preparation
[0006] Further search shows that there is no product of herbicide water agent of botanical origin with the chromatographic fraction of Sapindus chinensis extract as the active ingredient so far

Method used

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  • Preparation method of botanical herbicide water aqua
  • Preparation method of botanical herbicide water aqua
  • Preparation method of botanical herbicide water aqua

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of 20% Herbicidal Active Fraction Water of Sapindus Sapindus Extract

[0025] The seed coat of Soappindus vulgaris is air-dried or dried at 40-60℃, pulverized, and the extraction solvent is added according to the ratio of material to liquid (the specific extraction solvent is 95% ethanol), and the extraction is immersed for 4 hours. Repeated 3 times, and the extracts are combined. Concentrate to remove the organic solvent, and then use a macroporous resin column for further separation. Use ethanol aqueous solution (the volume ratio of ethanol: water is 0:100~95:5) (specifically, use pure water, 30% ethanol aqueous solution, 50% ethanol in sequence) Aqueous solution, 70% ethanol aqueous solution and 95% ethanol aqueous solution) for gradient elution. The eluted fractions eluted with 70% ethanol aqueous solution are concentrated and freeze-dried, which is the chromatographic fraction of Sapindus extract with herbicidal activity. Weigh 20g of the chroma...

Embodiment 2

[0034] Example 2 Screening and comparison of different surfactants

[0035] Purchase different surfactants from the market for comparison, including lignin (Sunamd106), sodium dodecylbenzene sulfonate, cocoamidopropyl betaine (CAB), alkyl glycoside (APG), fatty alcohol ethylene Ether (AEO), polycarboxylate (TERSPERSE 2700), etc. are the test materials, and 20% soapberry extract water is prepared respectively. By observing the appearance, surface tension and other indicators of the preparation, optimize the screening of surfactants. The results are shown in Table 2.

[0036] Table 2 Screening comparison of surfactants

[0037]

[0038] It can be seen from Table 2 that without surfactant, the formulation will appear flocculent and the solution will become turbid. After comparing the effects of different surfactants, it was found that adding 2% sodium dodecylbenzene sulfonate, the solution looks uniform, transparent, and has good fluidity and dilution stability, which is better than o...

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Abstract

The invention relates to a preparation method of a botanical herbicide water aqua, and belongs to the field of botanical pesticides. The botanical herbicide water aqua disclosed by the invention is composed of the following components by mass: 5-40% of an effective component, which is an herbicide active component obtained through column chromatography of an extract of sapindus mukorossi exotesta,1-5% of an anti-freezing agent, 2-6% of a surfactant and the balance of water, wherein the total amount of the components is 100%. The herbicide disclosed by the invention can be used for soil treatment after seeding is carried out and before seedlings grow out, root growth of weeds can be effectively inhibited, and prevention and removal of field weeds can be realized. Compared with the prior art, the botanical herbicide disclosed by the invention has the advantages of safety, high efficiency, low toxicity, no pollution, environment friendliness, no easy generation of herbicide resistance, and the like, and has a wide application prospect.

Description

Technical field [0001] The invention belongs to the field of plant-derived pesticides, in particular to a plant-derived herbicide aqua and a preparation method thereof by processing the herbicidal active fraction of a Sapindus extract through a macroporous resin column as a raw material. Background technique [0002] Farmland weeds are very harmful, and the world’s annual crop production is reduced by about 14% due to weeds. At present, the control methods of farmland weeds mainly rely on chemical herbicides. With the large-scale application of chemical herbicides, problems such as environmental water pollution and food safety have become increasingly serious. Plant-derived pesticides have the characteristics of safety, efficiency, low toxicity and low pollution. Therefore, the development of ecologically safe, efficient and low-toxic plant-based herbicides is an important direction for the development of herbicides. [0003] Sapindus mukurossi Gatren (Sapindus mukurossi Gatren) i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/08A01N25/02A01P13/00
CPCA01N25/02A01N65/00A01N65/08
Inventor 王进马晓江汤锋姚曦刘伟
Owner INT CENT FOR BAMBOO & RATTAN
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