# US 9,775,357 B2 · Low-concentration phytotoxic micronutrient compounds for selective control of invasive plant species

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- Number: US 9,775,357 B2
- Document ID: US9775357B2
- Status: Granted
- Kind: B2
- Application number: 14/760,905
- Filed: 2014-01-15
- Published: 2015-12-10
- Granted: 2017-10-03
- Earliest claimed: 2013-01-15
- Applicants: Stuart Jennings
- Inventors: Stuart Jennings
- Web page: https://patentgrep.com/patent/US9775357B2

## CPC

- A01N 59/20: Copper
- A01N 59/14: Boron; Compounds thereof
- C05D 9/02: containing trace elements
- C05G 3/60: Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
- Y02A 90/40: Monitoring or fighting invasive species
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- C05D: INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05G: MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS (organic fertilisers containing added bacterial cultures, mycelia, or the like C05F11/08; organic fertilisers containing plant vitamins or hormones C05F11/10); FERTILISERS CHARACTERISED BY THEIR FORM
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

This invention provides low-dose, low-concentration formulations of phytotoxic trace inorganic compounds for use in methods and systems for selectively and effectively controlling invasive plants.

## Claims

### Claim 1

A method for selectively controlling growth of at least one invasive plant species existing in a perennial grass community, comprising: applying copper to an area of the perennial grass community to achieve a soluble copper concentration in soil of the perennial grass community from about 0.1 milligrams per liter to about 50 milligrams per liter, and wherein said copper is phytotoxic to the at least one invasive plant species while preserving the growth and vigor of the perennial grass; wherein said at least one invasive plant species is selected from the group consisting of cheatgrass.

### Claim 2 (depends on 1)

The method of claim 1, wherein said copper produces a soluble soil copper concentration of about 0.1 milligrams per liter to about 5 milligrams per liter.

### Claim 3 (depends on 1)

The method of claim 1, wherein the copper is a copper-containing compound.

### Claim 4 (depends on 1)

The method of claim 1, wherein the area of the perennial grass community is a rangeland or disturbed land.

### Claim 5 (depends on 1)

The method of the claim 1, wherein the uppermost about 1 inch of soil achieves a soluble copper concentration in the soil of the perennial grass community from about 0.1 milligrams per liter to about 50 milligrams per liter.

### Claim 6

A method for negatively impacting the growth of at least one invasive plant species, comprising the selective control of the invasive plant species, existing in a perennial grass community rangeland, while preserving the perennial grass community species, comprising: applying copper to an area of the perennial grass community to achieve a soluble copper concentration in soil of the perennial grass community from about 0.1 milligrams per liter to about 50 milligrams per liter in the uppermost about 1 inch of soil, and wherein said copper is phytotoxic to the at least one invasive plant species while preserving the growth and vigor of the perennial grass, wherein the at least one invasive species is cheatgrass.