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Application of taiwanin H in preparation of herbicide

A herbicide and formulation technology, applied in the field of pesticide research and development, can solve the problems of phytotoxicity of subsequent crops, enhanced weed resistance, slow degradation of chemical herbicides, etc., and achieve significant effects.

Active Publication Date: 2021-01-26
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chemical herbicides are used in a large area all year round, which leads to the enhancement of weed resistance, and the slow degradation of various chemical herbicides often leads to phytotoxicity of subsequent crops

Method used

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  • Application of taiwanin H in preparation of herbicide
  • Application of taiwanin H in preparation of herbicide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 The separation of compound Taiwanin H

[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 was subjected to silica gel column chromatography with petroleum ether / acetone, petroleum ether / ethyl acetate, and chloroform / ethyl acetate in sequence, and then separated by Sephadex LH-20 Sephadex LH-20, after purification , available from Taiwanin H.

Embodiment 2

[0032] The herbicidal activity of embodiment 2 Taiwannin H

[0033] The herbicidal activity of Taiwanin H 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 H (50mg / L, 7d)

[0035] weed species Root length inhibition rate (%) Fresh weight inhibition rate (%) Red thistle (Ageratum conyzoides L.) 100.00±0.00 88.98±3.22 Mikania micrantha Kunth 100.00±0.00 81.02±0.34 Nightshade (Solanum nigrum L.) 100.00±0.00 69.78±1.66 Purslane (Portulaca oleracea L.) 100.00±0.00 71.02±0.65 Amaranth (Amaranthus retroflexus L.) 100.00±0.00 70.52±3.65 Lychee Grass (Saluia plebeia R.Br) 100.00±0.00 63.92±1.19 Plantain (Plantago asiatica L.) 100.00±0.00 68.50±0.79 Water lotus grass (Drymaria diandra Blume) 100.00±0.00 60.11±1.10 Duckweed (Lemna minor L.) 93.86±1.46 75.23±0.65 Amaranth (Amaranthus lividus L.) 91.88±1.03...

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Abstract

The invention discloses an application of Taiwanin H in preparing herbicide. The Taiwanin H compound, its structural analogues and / or pharmaceutically acceptable salts thereof are prepared as herbicides for application; the structure of the Taiwanin H is shown in Formula I. The Taiwanin H is derived from a plant, has a smooth degradation path in nature, has low residue, less pollution and high environmental protection. The invention discovers for the first time that Taiwanin H has an inhibitory effect on weeds, and the treated weeds have slow root growth and remarkable fresh weight inhibitionrate, thus inhibiting the normal growth of weeds, and can be prepared into herbicides for application. At that same time, the Taiwanin H has a good effect of inhibiting root growth on various dicotyledonous weeds, monocotyledonous weeds and aquatic weed, has broad spectrum and wide application range. The structure of the Taiwanin H is different from that of the existing herbicide, and the TaiwaninH can also provide a template reference for the creation of the herbicide; therefore, it has obvious significance in theory and practice.

Description

technical field [0001] The present invention relates to the technical field of pesticide research and development, more specifically, relates to the application of Taiwanin H 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 saf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/12A01P13/00
CPCA01N43/12
Inventor 周利娟黄继光
Owner SOUTH CHINA AGRI UNIV