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Ligularia virgaurea extract nano insecticide and preparation method thereof

A technology of extracts and insecticides, applied in the field of nano-pesticides of Ligularia pratense extract and its preparation, can solve the problems of weak adhesion and dispersion, large particle size, etc. Energy and equipment saving effect

Active Publication Date: 2018-11-23
GANSU ACAD OF SCI INST OF BIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Suspoemulsions and microcapsules with better control ability have been developed in the previous research on the extract of Ligularia pratense. Large, relatively weak adhesion dispersion, better effect of direct application, application has certain limitations

Method used

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  • Ligularia virgaurea extract nano insecticide and preparation method thereof
  • Ligularia virgaurea extract nano insecticide and preparation method thereof
  • Ligularia virgaurea extract nano insecticide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0042] Examples 1-10: See Table 1 for the distribution ratio of each component of the extract of Ligularia fruticosa nanopesticide.

[0043]

[0044] The preparation method of the nano-carrier material in embodiment 1-10 is as follows:

[0045] 1. Preparation method of cyclodextrin-immobilized chitosan polymer nanomaterial (nano carrier material):

[0046] (1) Preparation of mono-6-p-toluenesulfonyl-β-cyclodextrin ester

[0047] Slowly add a certain amount of NaOH solution dropwise to the aqueous solution containing 12% (w / v) β-cyclodextrin and its derivatives to dissolve it completely, stir vigorously at 25°C for 2 hours, then ice-water bath, and simultaneously add p-toluenesulfonate Acyl chloride (TsCI) acetonitrile solution was slowly added to the above ice bath solution, wherein the ratio of β-cyclodextrin and its derivatives to p-toluenesulfonyl chloride was 1:4 (weight ratio), let it stand for 30 minutes, and continued to stir at room temperature for 2 hours After f...

Embodiment 11

[0056] Example 11: Nano-pesticide of Ligularia fruticosa extract, the preparation method is as follows:

[0057] 1. Preparation method of cyclodextrin-immobilized chitosan polymer nanomaterial (nano carrier material):

[0058] (1) Preparation of mono-6-p-toluenesulfonyl-β-cyclodextrin ester

[0059] Slowly add a certain amount of NaOH solution dropwise to the aqueous solution containing 10% (w / v) β-cyclodextrin and its derivatives to dissolve it completely, stir vigorously at 20°C for 1 hour, then take an ice-water bath, and simultaneously add p-toluenesulfonate Acyl chloride (TsCI) acetonitrile solution was slowly added to the above ice bath solution, wherein the ratio of β-cyclodextrin and its derivatives to p-toluenesulfonyl chloride was 1:8 (weight ratio), let stand for 20min, and continue to stir at room temperature for 1h After filtering, collect the precipitate, adjust the pH of the filtrate to 8 with dilute HCl solution, place it at 3°C ​​for 10 h, filter, combine the...

Embodiment 12

[0068] Example 12: Nano-pesticide of Ligularia fruticosa extract, the preparation method is as follows:

[0069] 1. Preparation method of cyclodextrin-immobilized chitosan polymer nanomaterial (nano carrier material):

[0070] (1) Preparation of mono-6-p-toluenesulfonyl-β-cyclodextrin ester

[0071] Slowly add a certain amount of NaOH solution dropwise to the aqueous solution containing 15% (w / v) β-cyclodextrin and its derivatives to dissolve it completely, stir vigorously at 28°C for 3 hours, then take an ice-water bath, and simultaneously add p-toluenesulfonate Acyl chloride (TsCI) acetonitrile solution was slowly added to the above ice bath solution, wherein the ratio of β-cyclodextrin and its derivatives to p-toluenesulfonyl chloride was 1:3 (weight ratio), let stand for 40min, and continue to stir at room temperature for 3h After filtering, collect the precipitate, adjust the pH of the filtrate to 9 with dilute HCl solution, place it at 6°C for 20 hours, filter, combine ...

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Abstract

The invention discloses a ligularia virgaurea extract nano insecticide and a preparation method thereof, and belongs to the field of pesticides. The ligularia virgaurea extract nano insecticide is prepared from the following raw materials in percentage by weight: 50.4 to 68.25 percent of main active ingredient, 21.0 to 36.4 percent of nano-carrier material, 8.0 to 13.0 percent of solubilizer and 1.0 to 3.0 percent of dispersing agent; the main active ingredient is the ligularia virgaurea extract, wherein the total content of terpenoids, aromatic species, alkaloids, alcohol of small molecule, phenols and other compounds is greater than 86.3 percent; the nano-carrier material is selected from a cyclodextrin immobilized chitosan polymer formed by beta-cyclodextrin and derivatives thereof andchitosa. The ligularia virgaurea extract nano insecticide disclosed by the invention belongs to a plant-derived biological pesticide and is a high-efficiency nano-controlled slow release biological insecticide which takes a novel biodegradable polymer composite material as the carrier and takes the toxic plant ligularia virgaurea as the main active ingredient raw material.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a nanopesticide extracted from Ligularia chinensis and a preparation method thereof. Background technique [0002] After nearly 30 years of development in my country's biopesticide research and industry, the number of registered biopesticide active ingredients has reached 104, and the total number of registered products has reached 3335, accounting for about 11% to 13% of the total number of registered pesticides in my country, of which antibiotic products account for about 70% of the total number of registered products, and botanical pesticides account for about 30% of the total number of registered products. my country's plant pesticide resources are very rich, and "China Poisonous Plants" has listed more than 1,300 kinds of poisonous plants. However, the literature statistics in 2017 show that there are 19 registered active ingredients of botanical pesticides, accounting f...

Claims

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Application Information

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IPC IPC(8): A01N65/12A01N25/10A01N25/14A01P7/04B82Y30/00B82Y40/00
CPCA01N25/10A01N25/14A01N65/00A01N65/12B82Y30/00B82Y40/00
Inventor 刘锦霞李晶李娜丁品武建荣杜文静张建军
Owner GANSU ACAD OF SCI INST OF BIOLOGY
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