Use of a lignin fraction as an anti-phytopathogenic agent and anti-phytopathogenic compositions comprising the same

• US 11,363,821 B2
• Filed: 06/26/2017
• Issued: 06/21/2022
• Est. Priority Date: 07/01/2016
• Status: Active Grant

• Current Assignee: Green Innovation GmbH, Upm-Kymmene Corporation
• Original Assignee: Upm-Kymmene Corporation
• Inventors: Pietarinen, Suvi, Hubsch, Christian, Leonardi, Giuliano
• Primary Examiner(s): Barker, Michael
• Application Number:
  US16/314,714
• Publication Number:
  US 20190313648A1
• Time in Patent Office: 1,821 Days
• Field of Search: None
• CPC Class Codes: A01N 31/16 with two or more oxygen or sulfur atoms directly attached to the same aromatic ring system
• CPC Class Codes: A01N 65/00 Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof containing compounds of determined constitution A01N27/00 - A01N59/00
• CPC Class Codes: C07G 1/00 Lignin; Lignin derivatives
• CPC Class Codes: C08H 6/00 Macromolecular compounds derived from lignin, e.g. tannins, humic acids

Abstract

The use of a lignin fraction as an anti-phytopathogenic agent, anti-phytopathogenic compositions comprising the same, as well as methods of protecting plants against phytopathogens, are disclosed.

Claims

1. A method of protecting plants against phytopathogens, said method comprising the steps of:

i) providing a lignin fraction as an anti-phytopathogenic agent against a bacterium, fungus, oomycetes, or virus, said lignin fraction comprising fragments having a weight average molecular weight up to 5,500 Daltons, as measured by Size-Exclusion Chromatography, and having a number average molecular weight up to 2,000 Daltons, as measured by Size-Exclusion Chromatography, and

ii) applying the lignin fraction to a plant or plant soil.

2. The method of claim 1, wherein the lignin fraction comprises fragments having a weight average molecular weight up to 5,000 Daltons.

3. The method of claim 1, wherein the lignin fraction comprises fragments having a number average molecular weight up to 1,500 Daltons.

4. The method of claim 1, wherein the lignin fraction of step i) is dispersed in water at a concentration of less than 1,000 g/100 l of water.

5. The method of claim 1, wherein the lignin fraction in step ii) is applied to a plant at a quantity lower than 20,000 grams/ha, or the lignin fraction in step ii) is applied to plant soil at a quantity lower than 100,000 grams/ha.

6. An anti-phytopathogenic composition comprising:

a lignin fraction as an anti-phytopathogenic agent against a bacterium, fungus, oomycetes, or virus, said lignin fraction comprising fragments having a weight average molecular weight up to 5,500 Daltons, as measured by Size-Exclusion Chromatography, and having a number average molecular weight up to 2,000 Daltons, as measured by Size-Exclusion Chromatography, and agro-chemical additives.

7. The anti-phytopathogenic composition of claim 6, wherein the lignin fraction comprises fragments having a weight average molecular weight up to 5,000 Daltons.

8. The anti-phytopathogenic composition of claim 6, wherein the lignin fraction comprises fragments having a number average molecular weight up to 1,500 Daltons.

9. The anti-phytopathogenic composition of claim 6, comprising the lignin fraction in an amount up to 500 grams per kg of the composition itself.

10. The anti-phytopathogenic composition of claim 6, further comprising a solvent selected from water, ethanol, n-propanol, iso-propanol, n-butanol, isobutanol, allyl alcohol, 1,2-propylene glycol, 1,3-propylene glycol, 1,2-ethylene glycol, polyethylene glycol (PEG), benzyl alcohol, glycerol, DMSO, and mixtures thereof.

11. A method of protecting plants against phytopathogens, said method comprising the steps of:

a) providing an anti-phytopathogenic composition comprising a lignin fraction as an anti-phytopathogenic agent against a bacterium, fungus, oomycetes, or virus, said lignin fraction comprising fragments having a weight average molecular weight up to 5,500 Daltons, as measured by Size-Exclusion Chromatography, and having a number average molecular weight up to 2,000 Daltons, as measured by Size-Exclusion Chromatography, and agro-chemical additives, and

b) applying the anti-phytopathogenic composition to a plant or plant soil.

12. The method of claim 11, wherein the lignin fraction comprises fragments having a weight average molecular weight up to 5,000 Daltons.

13. The method of claim 11, wherein the lignin fraction comprises fragments having a number average molecular weight up to 1,500 Daltons.

14. The method of claim 11, comprising the lignin fraction in an amount up to 500 grams per kg of the composition itself.

15. The method of claim 11, wherein the anti-phytopathogenic composition further comprises a solvent selected from water, ethanol, n-propanol, iso-propanol, n-butanol, isobutanol, allyl alcohol, 1,2-propylene glycol, 1,3-propylene glycol, 1,2-ethylene glycol, polyethylene glycol (PEG), benzyl alcohol, glycerol, DMSO, and mixtures thereof.