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A kind of turmeric active extract, bactericidal preparation and application thereof

An extractant and extract technology, which is applied in the directions of fungicides, applications, biocides, etc., can solve the problems of chemical pesticide residues causing great harm to the environment, and achieve the effects of no pollutant residues, simple preparation methods, and expanded comprehensive utilization.

Inactive Publication Date: 2018-11-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The primary purpose of the present invention is to provide an active extract of turmeric, which aims to solve the problem that chemical pesticide residues are harmful to the environment

Method used

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  • A kind of turmeric active extract, bactericidal preparation and application thereof
  • A kind of turmeric active extract, bactericidal preparation and application thereof
  • A kind of turmeric active extract, bactericidal preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dry and pulverize 1g of fresh turmeric stems and leaves with 20ml 98wt% methanol for 8h, then leaching for 2h under 60KHz frequency ultrasonic waves at 40°C, filter under negative pressure with a Buchner funnel, remove the residue, and obtain leaching extract;

[0038] (2) Concentrate the extract obtained in step (1) with a rotary evaporator in a water bath at 45°C, and separate the methanol to obtain an extract-like turmeric active extract 1, which is stored at 4°C.

Embodiment 2

[0040] (1) The residue obtained in Example 1 step (1) is further stirred with 98wt% methanol equivalent to about 6 times the volume of the raw material mass, and leached for 1.0h under 60KHz frequency ultrasonic waves at 40°C to make the activity in turmeric The ingredients are fully extracted, filtered with a Buchner funnel under negative pressure, the residue is removed, and the extract is collected;

[0041] (2) The extract obtained in step (1) of Example 1 is combined with the extract obtained in step (1) of this example, and the combined extract is concentrated by rotary evaporation with a rotary evaporator in a water bath at 35°C, Extraction-like active extract 2 of Curcuma curcuma was obtained after methanol was separated.

Embodiment 3

[0043] (1) Dry and pulverize 1g of fresh curcuma tuber root in the shade and extract it with 5ml 85wt% ethanol for 24h, then extract it under 30KHz frequency ultrasonic waves at 40°C for 0.5h, filter it with a Buchner funnel under negative pressure, remove the residue, and obtain the tuber root Extraction solution;

[0044] (2) Concentrate the extract solution obtained in step (1) with a rotary evaporator in a water bath at 35° C., and separate ethanol to obtain active extract 3 of Curcuma curcuma in extract form.

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Abstract

The invention provides an active extract of turmeric, a bactericidal preparation and its application. The dried and crushed turmeric stems and leaves or tubers are leached with an extractant for 8 to 24 hours, and then heated at 30 to 50°C at 30 to 60 Hz. Extract under frequency ultrasonic waves for 0.5-2 hours, collect the extract solution; concentrate the extract solution by rotary evaporation at 30-55°C, separate the extractant to obtain the extract-like active extract of Curcuma officinalis, and then extract the active extract of Curcuma officinalis The extract is extracted and separated with an extractant to obtain the finished turmeric active extract. Both the extract-like turmeric active extract and the finished turmeric active extract of the invention can be used to inhibit and kill plant pathogenic fungi, and can be used to prepare fungicides. The preparation method of the present invention is simple, and can effectively inhibit and kill various plant pathogenic fungi; the bactericide of the present invention has wider sources of raw materials, high biological activity, no residual pollutants, ultrasonic extraction, and more comprehensive release of active substances.

Description

technical field [0001] The invention belongs to plant pesticide technology, and in particular relates to an active extract of turmeric, a bactericidal preparation and application thereof. Background technique [0002] The importance of pesticides to agricultural production is unquestionable. Pesticides can be used to kill insects, fungi and other organisms that harm crop growth. The earliest pesticides used were DDT, HCH, etc. They can eliminate pests in large quantities, but they are stable, can exist in the environment for a long time, and accumulate continuously in animals, plants and humans, so they were eliminated. [0003] Later, organophosphorus pesticides, such as dichlorvos, were used instead of the original pesticides. However, they contain phosphorus, which can easily cause eutrophication of aquatic organisms. [0004] It can be seen that the use of pesticides, on the one hand, does bring economic benefits to human beings, but on the other hand, it also brings g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N65/48A01P3/00
CPCA01N65/48
Inventor 龙章富陈琴刘庆亚陈次琼陈子柱
Owner SICHUAN UNIV
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