CN110583673A

CN110583673A - Application of Taiwanin E in preparation of herbicide

Info

Publication number: CN110583673A
Application number: CN201910892418.0A
Authority: CN
Inventors: 周利娟; 黄继光
Original assignee: South China Agricultural University
Current assignee: South China Agricultural University
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2019-12-20
Anticipated expiration: 2039-09-20
Also published as: CN110583673B

Abstract

The invention discloses an application of Taiwanin E in preparation of a herbicide. The Taiwannin E compound, the structural analogue and/or the pharmaceutically acceptable salt thereof is prepared into a herbicide for application; the structure of the Taiwanin E is shown as a formula I. The Taiwanin E is derived from plants, has a smooth degradation way in the nature, and has low residue, less pollution and high environmental protection; the invention discovers for the first time that the Taiwanin E can inhibit the growth of weeds, and the growth of roots of the weeds treated by the Taiwanin E is slowed down, and the fresh weight inhibition rate is obvious, so that the normal growth of the weeds is inhibited, and the Taiwanin E can be prepared into a herbicide for application; meanwhile, the Taiwanin E has a good root growth inhibition effect on various dicotyledonous weeds, monocotyledonous weeds and aquatic weeds, and has broad spectrum and wide application range; the structure of the Taiwannin E is different from that of the existing herbicide, and a template reference can be provided for the creation of the herbicide; therefore, there is a clear meaning both in theory and in practice.

Description

Application of Taiwanin E in preparation of herbicide

Technical Field

The invention relates to the technical field of pesticide research and development, and more particularly relates to application of Taiwanin E in preparation of herbicides.

Background

The herbicide solves the problems of water and fertilizer competition between weeds and crops and crop yield reduction by controlling the growth of the weeds. Meanwhile, as the phenomenon of labor force and work out in rural areas is increasingly common, the cultivation system is changed, and the dosage of the herbicide is rapidly increased. Therefore, its role and status in agricultural production is also becoming more and more important.

The chemical herbicide is used in large area throughout the year, so that the drug resistance of weeds is enhanced, and the later crops are often phytotoxicity caused by slow degradation speed of various chemical herbicides. The plant source herbicide has the characteristics of high degradation speed, high safety, less environmental pollution and low toxicity to people and livestock, is popular with the public, and accords with the national policy of pesticide reduction and synergism.

In the course of research on natural pesticides, the subject group screens balmeria japonica, which is a plant with good biological activity. In the process of researching the weeding activity of the herbicide, a plurality of chemical components are found to have obvious weeding activity and can be used for preventing and controlling weeds in the agricultural field.

Lignans are dimeric phenylpropanoid derivatives widely occurring in nature, and according to literature reports, these substances have various biological activities. Such as antitumor activity, central nervous system action, virus inhibition, smooth muscle spasmolysis action, and insecticidal action. The aryl naphthalene lignan is a natural product formed by oxidative polymerization of substituted phenyl propanoid, is divided into three types of aryl naphthalene, aryl dihydronaphthalene and aryl tetrahydronaphthalene according to the unsaturated degree of a naphthalene ring, and has the effects of resisting tumors, mitosis, killing insects and the like through research and report, but the research on the herbicidal activity of the aryl naphthalene lignan compound is not reported.

Disclosure of Invention

The invention aims to provide application of Taiwanin E in preparation of herbicides. On the basis of finding the weeding activity of the taxus chinensis, the subject group carries out system tracking separation to obtain Taiwanin E, which belongs to the aryl naphthalene lignans; the herbicidal activity of the herbicide is found for the first time, and the herbicide can be prepared to be used in the field of weed control.

It is another object of the present invention to provide a herbicide comprising said Taiwanin E, a structural analog thereof and/or a pharmaceutically acceptable salt thereof.

Still another object of the present invention is to provide a herbicidal composition comprising said Taiwanin E, its structural analogue and/or its pharmaceutically acceptable salt in admixture with other herbicidal agents.

The above object of the present invention is achieved by the following scheme:

the application of the Taiwanin E in preparing the herbicide, wherein the Taiwanin E compound, the structural analogue and/or the pharmaceutically acceptable salt thereof is prepared into the herbicide for application; the structure of Taiwanin E is shown as formula I:

tests show that the Taiwanin E has obvious inhibition effect on dicotyledonous weeds such as ageratum conyzoides, mikania micrantha, bidens pilosa, xiangsi grass, arabidopsis thaliana, redroot amaranth, feather cockscomb and the like, monocotyledonous weeds such as crab grass, goosegrass, barnyard grass and the like, and aquatic weeds such as pistia stratiotes, duckweed, spirogyra and the like; after the treatment, the growth of the roots of the weeds is obviously inhibited, the growth is slowed down, and the fresh weight inhibition rate is obvious; therefore, the compound Taiwannin E, the structural analogue thereof and/or the pharmaceutically acceptable salt thereof can be prepared and developed into a herbicide for use.

Preferably, the herbicide also comprises auxiliary materials commonly used in pesticide formulations.

Preferably, the herbicide is in the form of emulsifiable solution, wettable powder, water dispersible granules, soluble granules, microemulsion, emulsion in water, effervescent tablets, suspending agents or granules.

Preferably, the herbicide is used to control and/or prevent one or more of dicotyledonous weeds, monocotyledonous weeds or aquatic weeds.

More preferably, the dicotyledonous weeds are one or more of ageratum conyzoides, mikania micrantha, bidens pilosa, xiangsi grass, arabidopsis thaliana, amaranthus retroflexus or feather cockscomb.

More preferably, the monocotyledonous weeds are one or more of large crabgrass, goosegrass or barnyard grass and the like.

More preferably, the aquatic weeds are one or more of duckweed, pistia stratiotes, spirogyra and the like.

The invention also protects a herbicide comprising the Taiwanin E, a structural analogue thereof and/or a pharmaceutically acceptable salt thereof.

Preferably, the content of the Taiwanin E, the structural analogue thereof and/or the pharmaceutically acceptable salt thereof is 1-70% by mass, and the balance is auxiliary materials.

Also within the scope of the present invention is a herbicidal composition comprising Taiwanin E, a structural analog thereof, and/or a pharmaceutically acceptable salt thereof, as described above, and one or more commercially available herbicidal species.

Preferably, the weight percentage of the Taiwanin E, the structural analogue thereof and/or the pharmaceutically acceptable salt thereof is 1-50%, and the balance is auxiliary materials and/or herbicide.

Preferably, the herbicide composition is in the form of emulsifiable solution, wettable powder, water dispersible granules, soluble granules, microemulsion, aqueous emulsion, effervescent tablets, suspending agents or granules.

Compared with the prior art, the invention has the following beneficial effects:

the Taiwanin E is derived from plants, has a smooth degradation way in the nature, and has low residue, less pollution and high environmental protection; the invention discovers for the first time that the Taiwanin E has the function of inhibiting the growth of weed roots, and the growth of the roots of weeds treated by the Taiwanin E is slowed down, and the fresh weight inhibition rate is obvious, so that the normal growth of the weeds is inhibited, and the Taiwanin E can be prepared into a herbicide for application; meanwhile, the Taiwanin E has a good root growth inhibition effect on various dicotyledonous weeds, monocotyledonous weeds and aquatic weeds, and has broad spectrum and wide application range;

in addition, the Taiwanin E can also be combined with other weeding medicaments to prepare a mixture for application, and the effect is obvious; the structure of the Taiwannin E is different from that of the existing herbicide, and a template reference can be provided for the creation of the herbicide; therefore, there is a clear meaning both in theory and in practice.

Detailed Description

The present invention is further described in detail below with reference to specific examples, which are provided for illustration only and are not intended to limit the scope of the present invention. The test methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used are, unless otherwise specified, commercially available reagents and materials.

EXAMPLE 1 isolation of the Compound Taiwanin E

Drying and pulverizing bark of Cephalotaxus fortunei, extracting with methanol, and concentrating to obtain methanol extract. Dissolving the extract with methanol, suspending with water, sequentially extracting with petroleum ether and ethyl acetate to obtain ethyl acetate layer extract.

The ethyl acetate extracts were first subjected to silica gel column chromatography using chloroform/methanol system and then combined by TLC. And performing activity tracing, sequentially performing silica gel column chromatography on the active part by using petroleum ether/acetone and petroleum ether/ethyl acetate, separating by Sephadex LH-20, and purifying to obtain the Taiwanin E.

Example 2 herbicidal Activity of Taiwannin E

The herbicidal activity of Taiwanin E against various species of weeds was determined by the mini-cup method, and the results are shown in table 1.

TABLE 1 herbicidal Activity of Taiwanin E (50mg/L, 7d)

Species of weeds	Root growth inhibition (%)	Fresh weight inhibition (%)
			Ageratum conyzoides L.)	100.00±0.00	70.58±0.77
Rhizophora (Drymari)a diandra Blume)	100.00±0.00	71.59±0.37
			Solanum nigrum (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
Amaranthus retroflexus L (Amaranthus retroflexus L.)	74.56±0.40	50.24±1.95
			Mikania micrantha (Mikania mirrantha Kunth)	70.66±2.90	58.72±2.78
Common goosegrass (Eleusines indica (L.) Gaertn)	70.49±1.11	42.02±2.05
			Bidens pilosa L	55.63±1.84	39.51±2.33
Barnyard grass (Echinochloa colonum (L.) Link)	55.73±2.74	44.96±0.85
			Sonchus arvensis L (Sonchus arvensis L.)	51.97±3.15	45.37±1.03
Feather cockscomb (Celosia argentea L.)	47.52±3.41	39.47±1.46
			Erigeron breviscapus (Conyza canadens (L.) Cronq)	46.37±2.71	42.26±1.63
Amaranthus retroflexus (Amaranthus lividus L.)	40.09±1.20	40.41±1.30

As can be seen from Table 1, Taiwanin E shows very obvious inhibition effect on ageratum conyzoides, Rhizopus pulcherrima, nightshade, purslane, duckweed, Amaranthus retroflexus, mikania micrantha, eleusine indica and the like, and after treatment for 7 days at 50mg/L, the root length inhibition rate exceeds 70%, and reaches 100% at most, which indicates that the compound has excellent herbicidal activity.

It should be finally noted that the above examples are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and that other variations and modifications based on the above description and thought may be made by those skilled in the art, and that all embodiments need not be exhaustive. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

The application of the Taiwanin E in preparing the herbicide is characterized in that the Taiwanin E compound, the structural analogue and/or the pharmaceutically acceptable salt thereof is prepared into the herbicide for application; the structure of Taiwanin E is shown as formula I:
2. the use according to claim 1, wherein the herbicide further comprises adjuvants commonly used in pesticide formulations.
3. The use according to claim 1, wherein the herbicide is in the form of emulsifiable concentrate, wettable powder, water dispersible granule, water soluble granule, microemulsion, aqueous emulsion, effervescent tablet, suspension or granule.
4. Use according to claim 1, wherein the herbicide is used for controlling and/or preventing one or more of dicotyledonous weeds, monocotyledonous weeds or aquatic weeds.
5. A herbicide comprising Taiwanin E according to claim 1 or 2, a structural analog thereof and/or a pharmaceutically acceptable salt thereof.
6. The herbicide as claimed in claim 5, wherein the Taiwanin E, the structural analogue and/or the pharmaceutically acceptable salt thereof accounts for 1-70% by mass, and the balance is auxiliary materials.
7. The herbicide as claimed in claim 5, wherein the herbicide is in the form of emulsifiable concentrate, wettable powder, water dispersible granule, soluble granule, microemulsion, aqueous emulsion, effervescent tablet, suspension or granule.
8. A herbicidal composition comprising Taiwanin E according to claim 1 or 2, a structural analogue thereof and/or a pharmaceutically acceptable salt thereof, and one or more commercially available herbicide species.
9. The herbicide composition as claimed in claim 8, wherein the Taiwanin E, the structural analogue and/or the pharmaceutically acceptable salt thereof accounts for 1-50% by mass, and the balance is adjuvant and/or herbicide.
10. A herbicide composition as recited in claim 8, wherein said herbicide composition is in the form of emulsifiable concentrate, wettable powder, water dispersible granule, soluble granule, microemulsion, aqueous emulsion, effervescent tablet, suspension or granule.