Rhubarb free anthraquinone nanometer emulsion preparation for preventing and treating plant red spider disease

A technology of free anthraquinone and anthraquinone nanometers, which is applied in the field of pesticides, can solve the problem that rhubarb free anthraquinone nanoemulsions have no anti-plant red spider disease activity, etc., and achieve easy mass production, simple preparation process, and significant control effect Effect

Active Publication Date: 2015-12-09
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no technical publication has been found on the anti-plant spider mite activity of rhubarb free anthraquinone nanoemulsion preparations

Method used

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  • Rhubarb free anthraquinone nanometer emulsion preparation for preventing and treating plant red spider disease
  • Rhubarb free anthraquinone nanometer emulsion preparation for preventing and treating plant red spider disease
  • Rhubarb free anthraquinone nanometer emulsion preparation for preventing and treating plant red spider disease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the extraction of rhubarb free anthraquinone

[0018] Experimental conditions

[0019] Rhubarb was purchased from Lixian Xinshengyuan Biotechnology Development Co., Ltd. The crushed and sieved rhubarb powder was added to 20% sulfuric acid for acid hydrolysis, and the dregs were washed with water until neutral and then dried. Rhubarb hydrolyzed dry powder is mixed according to the raw material drug: 90% ethanol = 1:30 (w / v), ultrasonically extracted, suction filtered while hot, the filtrate is concentrated under reduced pressure until it has no alcohol smell, extracted with chloroform, and the chloroform extract is then 5% NaOH Extract until the supernatant is colorless, combine the alkaline extracts, adjust the pH to about 2, centrifuge to collect the precipitate, and wash with water until neutral to obtain the crude rhubarb free anthraquinone. After the crude product is dried, add methanol for ultrasonic dissolution according to the ratio of crude drug: ...

Embodiment 2

[0020] Embodiment 2: Prescription and preparation of rhubarb free anthraquinone nanoemulsion

[0021] Prescription one:

[0022] Rhubarb free anthraquinone 0.130g, oil phase 19.5g, emulsifier 16.5g, co-emulsifier 4.5g, stabilizer 1.0g, preservative 0.1g, adhesive agent 0.1g, purified water 58.4g, total weight about 100.0g.

[0023] Prescription two:

[0024] Rhubarb free anthraquinone 0.098g, oil phase 18.4g, emulsifier 16.0g, co-emulsifier 4.0g, stabilizer 1.0g, preservative 0.1g, adhesive agent 0.1g, purified water 60.5g, total weight about 100.0g.

[0025] In the prescription: rhubarb free anthraquinone is the main drug, the oil phase is propylene glycol monocaprylate (prescription 2) or its mixture with ethyl oleate (prescription 1), the emulsifier is polyoxyethylene-40-hydrogenated castor oil, The auxiliary emulsifier is diethylene glycol monoethyl ether, the stabilizer is oleic acid, the preservative is sodium benzoate, and the adhesive agent is silicon trioxide.

[0...

Embodiment 3

[0028] Embodiment 3: Type, property, content determination and stability of rhubarb free anthraquinone nanoemulsion

[0029] Test condition: to the nanoemulsion that embodiment 2 prescription one obtains, carry out following test:

[0030] Identification of nanoemulsion type: the type of nanoemulsion is identified by dyeing method, and the type of nanoemulsion is judged by the diffusion speed of oil-soluble dye Sudan red and water-soluble dye methylene blue in nanoemulsion.

[0031] Properties of nanoemulsion: appearance, light transmittance, pH value, viscosity, particle size and Zeta potential.

[0032] Content determination: take 1 ml of rhubarb free anthraquinone nanoemulsion, add 10 ml of methanol, ultrasonically break the emulsion, filter through a 0.45 μm microporous membrane, analyze with high performance liquid chromatography (HPLC), and calculate the total free anthraquinone in rhubarb free anthraquinone nanoemulsion. Anthraquinone content.

[0033] Stability inves...

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Abstract

The invention belongs to the technical field of biopesticide, and particularly relates to a recipe and a preparation process of a rhubarb free anthraquinone nanometer emulsion preparation, and application of the rhubarb free anthraquinone nanometer emulsion preparation to the prevention and the treatment of the plant red spider disease. The rhubarb free anthraquinone is extracted from traditional Chinese medicine sorrel, rheum tanguticum or rheum officinale. Through being metered by the mass percentage of each ingredient contained in the nanometer emulsion, the content of the rhubarb free anthraquinone in the nanometer emulsion accounts for 0.05 to 0.16 percent; the oil phase in the nanometer emulsion accounts for 18 to 22 percent; the emulsifiers account for 16 to 20 percent; co-emulsifiers account for 4 to 6 percent; water accounts for 50 to 61 percent; stabilizing agents account for 1.0 percent; preservatives account for 0.1 percent; attaching agents account for 0.1 percent. The rhubarb free anthraquinone nanometer emulsion preparation can be used for preventing and treating the plant red spider disease. The free anthraquinone from the rhubarb free anthraquinone nanometer emulsion preparation disclosed by the invention is from the traditional chinese medicine rhubarb; the applicability of the extraction process is high; the raw material obtaining cost is low; the nanometer emulsion preparation is automatically formed; the process is simple; the quality is controllable; the mass production can be easily realized; excellent prevention and treatment effects are achieved on the plant red spider disease.

Description

technical field [0001] The invention belongs to the field of pesticides, in particular to a rhubarb free anthraquinone nanoemulsion preparation for preventing and treating plant red spider disease. Background technique [0002] Plant spider mite disease widely exists on the stems and leaves of various crops, vegetables, flowers, trees and other plants, and mainly harms crops such as Solanaceae, Cucurbitaceae, Leguminosae, Liliaceae and Gramineae. The species of spider mite in my country is dominated by Tetranychus cinnabarinidae, belonging to Arachnida, Acaridae, and Tetranychidae. It has a wide distribution area and miscellaneous feeding habits, and can harm more than 110 kinds of plants. The red spider has a large reproduction rate, and the insects are small and difficult to find. Once the damage is found, the transfer speed is fast, the pest area is large, and the crops are repeatedly infested. The way of harm is that the mouthparts penetrate into the leaves to suck the ...

Claims

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Application Information

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IPC IPC(8): A01N65/30A01N35/06A01N25/04A01P7/02
Inventor 史彦斌李金成李红玉
Owner LANZHOU UNIVERSITY
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