Application of taiwanin E in preparation of herbicide

A technology for herbicides and weeds, applied in the field of pesticide research and development, can solve the problems of unreported research on the herbicidal activity of aryl naphthalene lignans

Active Publication Date: 2020-10-23
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, aryl naphthalene lignans are natural products formed by oxidative polymerization of substituted phenylpropanoids. According to the degree of unsaturation of the naphthalene ring, they are divided into aryl naphthalene, aryl dihydronaphthalene and aryl tetrahydronaphthalene. It has been reported that it has anti-tumor, anti-mitotic and insecticidal effects, but there is no report on the herbicidal activity of aryl naphthalene lignans

Method used

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  • Application of taiwanin E in preparation of herbicide
  • Application of taiwanin E in preparation of herbicide
  • Application of taiwanin E in preparation of herbicide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The separation of embodiment 1 compound Taiwanin E

[0030] After drying and pulverizing the stem bark of the plant, it is extracted with methanol and concentrated to obtain the methanol extract. After the extract was dissolved in methanol and suspended in water, it was sequentially extracted with petroleum ether and ethyl acetate to obtain the ethyl acetate layer extract.

[0031] The ethyl acetate extract was subjected to silica gel column chromatography with chloroform / methanol system, and then combined by TLC. Combined with activity tracking, the active part is subjected to silica gel column chromatography with petroleum ether / acetone and petroleum ether / ethyl acetate in sequence, and then separated by Sephadex LH-20 Sephadex LH-20. After purification, Taiwanin E can be obtained.

Embodiment 2

[0032] The herbicidal activity of embodiment 2 Taiwannin E

[0033] The herbicidal activity of Taiwanin E on different types of weeds was determined by the small cup method, and the results are shown in Table 1.

[0034] Table 1 Herbicidal activity of Taiwanin E (50mg / L, 7d)

[0035] weed species Root length inhibition rate (%) Fresh weight inhibition rate (%) Red thistle (Ageratum conyzoides L.) 100.00±0.00 70.58±0.77 Water lotus grass (Drymaria diandra Blume) 100.00±0.00 71.59±0.37 Nightshade (Solanum nigrum L.) 100.00±0.00 63.37±1.44 Purslane (Portulaca oleracea L.) 94.36±0.47 66.56±2.77 Duckweed (Lemna minor L.) 86.39±0.69 83.71±1.63 Amaranth (Amaranthus retroflexus L.) 74.56±0.40 50.24±1.95 Mikania micrantha Kunth 70.66±2.90 58.72±2.78 Goosegrass (Eleusine indica (L.) Gaertn) 70.49±1.11 42.02±2.05 Ghost needle grass (Bidens pilosa L.) 55.63±1.84 39.51±2.33 Bald barnyard barnyard (Echinochloa c...

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Abstract

The invention discloses an application of Taiwanin E in preparation of herbicides. The Taiwanin E compound, a structural analog thereof and / or a pharmaceutically acceptable salt thereof is prepared asherbicides for application, and a structure of the Taiwanin E is shown in a formula I. The Taiwanin E is derived from plants, has a smooth degradation pathway in nature, and has low residue, low pollution, and high environmental protection. The invention finds for the first time that the Taiwanin E can inhibit growth of weeds, growth of roots of the weeds treated by the Taiwanin E becomes slow, afresh-weight inhibition rate is significant, and thereby normal growth of the weeds is inhibited, so that the Taiwanin E can be prepared as herbicides for application. At the same time, the TaiwaninE shows relatively good effects of inhibiting root growth on a variety of dicotyledonous, monocotyledonous and aquatic weeds, has broad-spectrum properties, and has a wide application range. Moreover,the structure of the Taiwanin E is different from existing herbicides, and can provide a template for creation of herbicides, so that the Taiwanin E has obvious significance both in theory and in practice.

Description

technical field [0001] The invention relates to the technical field of pesticide research and development, and more specifically, relates to the application of Taiwanin E in the preparation of herbicides. Background technique [0002] By controlling the growth of weeds, herbicides solve the problem of weeds competing with crops for water and fertilizer, causing crop yield reduction. At the same time, as the phenomenon of rural laborers going out to work is becoming more and more common, the cultivation system is also changing, and the amount of herbicides is increasing rapidly. Therefore, its role and status in agricultural production are becoming more and more important. [0003] The large-scale use of chemical herbicides all year round leads to the enhancement of weed resistance, and the slow degradation of various chemical herbicides often leads to phytotoxicity of subsequent crops. However, botanical herbicides have the characteristics of fast degradation, high safety,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/90A01P13/00
CPCA01N43/90
Inventor 周利娟黄继光
Owner SOUTH CHINA AGRI UNIV
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