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Insecticide prepared from active ingredients of ginkgo biloba testa and preparation method of insecticide

A technology for ginkgo biloba seed coat and preparation of pesticides, which can be used in pesticides, botanical equipment and methods, acaricides, etc., and can solve the problems of insufficient utilization of material components, high cost of raw materials, and low insecticidal efficiency. , to achieve the effect of being beneficial to the protection of ecological balance, the preparation of products is simple, and the raw materials are environmentally friendly and easy to obtain.

Inactive Publication Date: 2018-05-18
平昌县西兴小学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The formula components are too complex and the cost of raw materials is high
[0005] 2. There is no targeted research and extraction of highly effective insecticidal active ingredients in Ginkgo biloba exotesta extract, resulting in low insecticidal efficiency of existing Ginkgo biloba exotesta extract. underutilized
[0006] 3. The existing preparation technology and preparation method of insecticides prepared by using Ginkgo biloba exotesta extract failed to effectively protect the high-efficiency insecticidal active ingredients in Ginkgo biloba exotesta, and its products failed to achieve the ideal insecticidal effect. bug effect

Method used

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  • Insecticide prepared from active ingredients of ginkgo biloba testa and preparation method of insecticide
  • Insecticide prepared from active ingredients of ginkgo biloba testa and preparation method of insecticide

Examples

Experimental program
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Effect test

Embodiment 1

[0039] S1: Ginkgo biloba plant component paste crude extract preparation: take 2 kg of air-dried Ginkgo biloba, put it in a constant temperature blast drying oven at 60°C and dry it until it becomes brittle, and then dry the dried Ginkgo biloba The seed coat is pulverized with a plant pulverizer, and passed through a 30-mesh sieve to obtain dry ginkgo testa powder; then, the prepared ginkgo testa dry powder is leached with 2 times the amount of methanol at room temperature for 35 hours, and filtered to remove impurities. The obtained filtrate was pressurized, concentrated, and evaporated to dryness to obtain 1.6 kg of ginkgo exocarp plant component paste crude extract.

[0040] S2: The obtained ginkgo exocarp plant component paste crude extract is subjected to the following multiple column analysis:

[0041] S201: Dissolve the paste-like crude extract with 50:50 chloroform-methanol, put it on a macroporous resin column, elute with chloroform for 15 seconds, then elute with met...

Embodiment 2

[0046] S1: Ginkgo biloba plant component paste crude extract preparation: take 3 kg of air-dried Ginkgo biloba, put it in a constant temperature blast drying oven at 85°C and dry it until it becomes brittle, and then dry the dried Ginkgo biloba The seed coat is pulverized with a plant pulverizer, and passed through a 40-mesh sieve to obtain dry ginkgo testa powder; then, the prepared ginkgo testa dry powder is leached with 5 times the amount of methanol at room temperature for 48 hours, filtered to remove impurities, The obtained filtrate was pressurized, concentrated, and evaporated to dryness to obtain 2.0 kg of ginkgo exocarp plant component paste crude extract.

[0047] S2: The obtained Ginkgo biloba testa plant component paste crude extract is subjected to multiple column chromatography analysis:

[0048] S201: Dissolve the paste-like crude extract with 50:50 chloroform-methanol, put it on a macroporous resin column, elute with chloroform for 10 seconds, then elute with m...

Embodiment 3

[0053] S1: Ginkgo biloba plant component paste crude extract preparation: Take 4 kg of air-dried Ginkgo biloba, put it in a constant temperature blast drying oven at 80°C and dry it until it becomes brittle, and then dry the dried Ginkgo biloba The seed coat is pulverized with a plant pulverizer, and passed through a 35-mesh sieve to obtain dry ginkgo testa powder; then, the prepared ginkgo testa dry powder is leached with 3 times the amount of methanol at room temperature for 40 hours, filtered to remove impurities, The obtained filtrate was pressurized, concentrated, and evaporated to dryness to obtain 2.6 kg of ginkgo exocarp plant component paste crude extract.

[0054] S2: The obtained Ginkgo biloba testa plant component paste crude extract is subjected to multiple column chromatography analysis:

[0055] S201: Dissolve the paste-like crude extract with 50:50 chloroform-methanol, put it on a macroporous resin column, elute with chloroform for 12 seconds, then elute with m...

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Abstract

The invention discloses an insecticide prepared from active ingredients of ginkgo biloba testa. The insecticide mainly comprises two active ingredients including ginkgolic acid and tartaric acid whichare extracted from the ginkgo biloba testa. By limiting a dosage relationship between the two active ingredients of ginkgolic acid and tartaric acid and regulating and adjusting a pH value of a finally prepared insecticide solution, the prepared insecticide has a significantly enhanced killing effect on plant, fruit and vegetable pests, such as lipaphis erysimi, plutella xylostella, panonychus citri and the like. In addition, the invention also provides a method for preparing the insecticide from the active ingredients of the ginkgo biloba testa, high-purity selective extraction of high-efficiency insecticidal components including ginkgolic acid and tartaric acid from the ginkgo biloba testa can be achieved, and meanwhile protection of bioactivity of ginkgolic acid and tartaric acid in the production process is ensured, so that the highly effective and environmentally friendly organic insecticide is prepared. The method is simple in operation, raw materials are environmentally friendly and easy to obtain, and the formula for preparing a product is simple. In addition, the insecticide has high efficiency, low toxicity, no residues and no pollution and is more conducive to ecological balance protection.

Description

technical field [0001] The invention relates to an insecticide for vegetables and fruits, in particular to an insecticide prepared from ginkgo exocarp active ingredients and a preparation method thereof. Background technique [0002] At present, people usually use high-concentration pesticide spraying to kill vegetable insects. Although the control effect is good, the residual pesticide components in vegetables are too high. Long-term consumption will easily cause the immunity of various functions of the human body to decline, leading to various hidden dangers. happened. In recent years, also many scholars have begun to study pure natural pollution-free plant insecticides, such as patent (CN104273184B), patent (CN106305846A), patent (CN106259513A) etc., wherein, Ginkgo biloba is also the preparation of existing plant pesticides. One of the raw materials. [0003] Ginkgo biloba L. is a perennial deciduous tree of the Ginkgo family. Ginkgo exotesta is the fleshy part outside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N37/40A01P7/04A01P7/02
CPCA01N37/40
Inventor 罗华松李君华肖娜
Owner 平昌县西兴小学
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