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Ginkgo snail-killing micro emulsion and preparation method thereof

A technology of snail microemulsion and ginkgo, which is applied in the field of ginkgo molluscicide microemulsion and its preparation, can solve the problems of poor compatibility and inability to fully reflect the advantages of ginkgo molluscicide, and achieve low cost, easy promotion, use, and production The effect of simple process

Inactive Publication Date: 2008-02-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the environmental compatibility of its preparation form is poor, it will not be able to fully reflect the advantages of ginkgo molluscicide

Method used

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  • Ginkgo snail-killing micro emulsion and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the preparation of 2% ginkgo molluscicide microemulsion

[0030] The preparation process of the Ginkgo biloba testa extract containing ginkgolic acid: the Ginkgo biloba testa was dried at 60°C, crushed, passed through a 20-mesh sieve, added petroleum ether (boiling range 60-90°C) and ultrasonically assisted to extract at 30°C. Once, each time for 1 hour, the ratio of the volume and weight of petroleum ether to Ginkgo testa pulverized material is 5: 1 (ml / g); filter under reduced pressure, combine the extracts for 3 times, concentrate under reduced pressure at 60°C, and evaporate Solvent to obtain Ginkgo biloba exocarp petroleum ether extract.

[0031] The preparation process of 2% ginkgolic acid microemulsion: in a 1000 ml there-necked bottle equipped with a stirrer, 20 g of ginkgo exocarp petroleum ether extract, 80 g of absolute ethanol, 80 g of n-butanol, DBS- Ca100g and NP-10100g, after mixing, add 620g deionized water and mix evenly, stir at 50-60°C ...

Embodiment 2

[0032] Embodiment 2: the preparation of 6% ginkgo oncomelania microemulsion

[0033] The preparation process of the Ginkgo biloba testa extract containing ginkgolic acid: the Ginkgo biloba testa was dried at 60°C, crushed, passed through a 20-mesh sieve, and extracted 3 times with ethyl acetate ultrasound at 30°C, 1 hour each time, The volume and weight ratio of ethyl acetate and ginkgo exocarp pulverization is 5:1 (ml / g); filter under reduced pressure, combine 3 extracts, concentrate under reduced pressure at 60°C, and evaporate the solvent to obtain ginkgo exocarp Piper ethyl acetate extract.

[0034] The preparation process of 6% ginkgolic acid microemulsion: in a 1000 ml there-necked bottle equipped with a stirrer, add 60 g of ethyl acetate extract of ginkgo testa, 80 g of absolute ethanol, 80 g of n-butanol, DBS successively under high-speed stirring - Ca100g and NP-10100g, after mixing, add 580g deionized water and mix evenly, stir at 50-60°C at high speed until it beco...

Embodiment 3

[0035] Embodiment 3: the preparation of 10% ginkgo oncomelania microemulsion

[0036] The preparation process of the Ginkgo biloba testa extract containing ginkgolic acid: the Ginkgo biloba testa was dried at 60°C, crushed, passed through a 20-mesh sieve, extracted 3 times with ethanol ultrasound at 30°C, and the ethanol and Ginkgo biloba testa were crushed The ratio of volume to weight of the product is 5:1 (ml / g); filter under reduced pressure, combine 3 extracts, concentrate under reduced pressure at 60°C, and evaporate the solvent to obtain ethanol extract of Ginkgo biloba exocarp.

[0037] The preparation process of 10% ginkgolic acid microemulsion: In a 1000 ml there-necked bottle equipped with a stirrer, add 100 g of ginkgo exocarp ethanol extract, 80 g of absolute ethanol, 80 g of n-butanol, and 100 g of DBS-Ca successively under high-speed stirring and 100g of NP-10, after mixing, add 540g of deionized water and mix evenly, stir at 50-60°C at high speed until it becom...

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Abstract

The invention discloses a gingko snail killing microemulsion agent and a preparing method, which relates to the technical field of plant source agricultural drug production. The invention takes the seed shell extract of the gingko containing a ginkgoic acid as the source drug, and the invention is made by configuring auxiliary surface active agents, solution agent and antifreeze agent as well as water. The producing method comprises the following operating steps: the gingko external seed shell extract, the microemulsion agent and the solution agent are blended to be an even and transparent oil phase; the steamed water or the deionized water are added slowly to form an oil enclosed water type emulsion during the agitating process; through agitating and heating, the emulsion is rapidly converted into a water enclosed oil type; a steady O or W type emulsion after being cooled to reach the constant indoor temperature is obtained. The invention has fine environmental compatibility of the emulsion conformation, also completely realizes the advantages of the gingko snail killing agent with high efficiency to the snail and safety to people and animals. The microemulsion agent takes water as the main solvent with slight influence to environment. In addition, the invention has remarkable synergism; the LC 50 and LC 90 of the 24h respectively are 0.56mg per liter and 3.5mg per liter, which are obviously better than that of the 24h snail killing effect (LC50 is equal to 1.35mg per liter and the LC90 is equal to 3.85mg per liter) of the external seed shell extract of the original drug.

Description

technical field [0001] The invention relates to the technical field of preparation of botanical pesticides, in particular to a ginkgo oncomelania microemulsion with ginkgolic acid in the ginkgo exotesta extract as an active ingredient and a preparation method thereof. Background technique [0002] Microemulsion (ME) is a pesticide formulation dispersed in water with tiny pesticide droplets, and is an oil-in-water (O / W) or water-in-oil (W / O) emulsion dispersion. It is a pesticide preparation formed by stably dispersing the solution (or molten state) of tiny pesticide droplets or solid original drug in water with the help of various auxiliaries and proper preparation process. The appearance is transparent or translucent. Microemulsions use water as the main component, without or less use of organic solvents, less environmental pollution, good compatibility with the environment, and the dispersion of pesticides in the preparation is very fine (0.01-0.1μm), more effective than e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/00A01N25/02A01P9/00A01N25/30A01N65/06
CPCY02A50/30
Inventor 杨小明陈盛霞夏磊
Owner JIANGSU UNIV
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