Soil-borne disease control method, soil for plant cultivation use, and soil-borne disease control agent

Patent metadata

Field	Value
Publication number	US-11000035-B2
Application number	US-201715658799-A
Country	US
Kind code	B2
Filing date	Jul 25, 2017
Priority date	Jan 26, 2015
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

Disclosed herein is a soil-borne disease control method capable of simply suppressing a soil-borne pathogen. The method for controlling a soil-borne disease includes applying at least one polyhydroxyalkanoic acid having a structure represented by the following formula (1) to soil:

[—CHR—CH 2 —CO—O—]  (1)

(wherein R is an alkyl group represented by C n H 2n+1 and n is an integer of 1 or more but 15 or less).

First claim

The invention claimed is:

1. A method for controlling a soil-borne disease, the method comprising:
applying at least one polyhydroxyalkanoic acid having a structure of the formula (1) to soil containing at least one microorganism capable of decomposing the at least one polyhydroxyalkanoic acid and having antagonism against a pathogen that causes the soil-borne disease:
[—CHR—CH 2 —CO—O—]  (1),

wherein R is an alkyl group represented by C n H 2n+1 and n is an integer of from 1 to 15; and
growing the at least one microorganism in the soil to which the polyhydroxyalkanoic acid is applied,
wherein the soil-borne disease is at least one selected from the group consisting of white root rot caused by a white root rot fungus, Armillaria root rot caused by Armillaria mellea , violet root rot caused by Helicobasidium mompa, Phytophthora disease caused by Phytophthora cactorum , and crown gall caused by Rhizobium radiobacter , and
wherein the at least one microorganism capable of decomposing the at least one polyhydroxyalkanoic acid and having antagonism against a pathogen that causes the soil-borne disease belongs to the genera of Trichoderma, Glomus, Penicillium, Beauveria, Clonostachys, Sordaria, Bacillus, Pseudomonas, Streptomyces, Chaetomium , or Rhizobium.

2. The method according to claim 1 , wherein a volume of the at least one polyhydroxyalkanoic acid applied to the soil is 1% or more of a total volume of the at least one polyhydroxyalkanoic acid and the soil.

3. The method according to claim 1 , wherein the applying is performed by mixing the at least one polyhydroxyalkanoic acid and the soil.

4. The method according to claim 1 , wherein the soil-borne disease is white root rot caused by a white root rot fungus.

5. The method according to claim 1 , wherein the at least one polyhydroxyalkanoic acid comprises poly(3-hydroxybutyric acid-co-3-hydroxyhexanoic acid).

6. The method according to claim 1 , wherein the at least one polyhydroxyalkanoic acid has a 3-hydroxybutyric acid monomer content of 60 mol % or more.

7. The method according to claim 1 , wherein the at least one polyhydroxyalkanoic acid has a weight-average molecular weight of 3,000 or more.

8. The method according to claim 1 , wherein the at least one polyhydroxyalkanoic acid has a weight-average molecular weight of 400,000 or more.

9. The method according to claim 1 , wherein the at least one polyhydroxyalkanoic acid is in the form of an emulsion or slurry, and has an average particle diameter of 0.1 μm to 100 μm.

10. The method according to claim 1 , wherein the at least one polyhydroxyalkanoic acid is in the form of a powder or a sphere, and has an average particle diameter of 1 μm to 10 mm.

11. The method according to claim 3 , wherein a mixture of the at least one polyhydroxyalkanoic acid and the soil is left for at least one week at a temperature of 10 to 30° C. such that the at least one microorganism in the soil grows in the mixture.

12. The method according to claim 1 , wherein an amount of the at least one polyhydroxyalkanoic acid applied to the soil is from 1 to 60 parts by volume per 100 parts by volume of soil.

13. The method according to claim 1 , wherein the growing is performed such that the at least one microorganism is proliferated in the soil.

14. The method according to claim 1 , wherein the at least one microorganism is a microorganism that originally lives in the soil.

15. The method according to claim 2 , wherein the applying is performed by mixing the at least one polyhydroxyalkanoic acid and the soil.

16. The method according to claim 2 , wherein the soil-borne disease is white root rot caused by a white root rot fungus.

17. The method according to claim 2 , wherein the at least one polyhydroxyalkanoic acid comprises poly(3-hydroxybutyric acid-co-3-hydroxyhexanoic acid).

18. The method according to claim 2 , wherein the at least one polyhydroxyalkanoic acid has a 3-hydroxybutyric acid monomer content of 60 mol % or more.

Assignees

• National Res And Development Agency National Agriculture And Food Res Organization
• Kaneka Corp

Inventors

• Nakamura Hitoshi
• Suzaki Koichi
• Sugaya Takahiko
• Kobayashi Shingo

Classifications

• A01P3/00

  Fungicides · CPC title

• A01N61/00

  Biocides, pest repellants or attractants, or plant growth regulators containing substances of unknown or undetermined composition, e.g. substances characterised only by the mode of action · CPC title

• A01N37/36 Primary

  containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids · CPC title

• A01M17/00

  Apparatus for the destruction of vermin in soil or in foodstuffs {(injecting fertilisers into the roots of trees A01G29/00)} · CPC title

• A01N25/12

  Powders or granules (A01N25/26 takes precedence) · CPC title