# US 9,040,458 B2 · Safening composition of 6-(trisubstituded phenyl)-4-amino-2-pyridinecarboxylate herbicides and cloquintocet-mexyl for cereal crops

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- Number: US 9,040,458 B2
- Document ID: US9040458B2
- Status: Granted
- Kind: B2
- Application number: 14/104,651
- Filed: 2013-12-12
- Published: 2014-04-10
- Granted: 2015-05-26
- Earliest claimed: 2008-11-24
- Assignees: Dow AgroSciences LLC
- Applicants: Dow AgroSciences LLC
- Inventors: Norbert M. Satchivi; Paul R. Schmitzer
- Web page: https://patentgrep.com/patent/US9040458B2

## CPC

- A01N 25/32: Ingredients for reducing the noxious effect of the active substances to organisms other than pests, e.g. toxicity reducing compositions, self-destructing compositions
- A01N 43/40: six-membered rings
- 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

## Abstract

Herbicidal injury caused by 6-trisubstituted phenyl)-4-amino-2-pyridinecarboxylates in wheat and barley is reduced with the use of low rates of cloquintocet.

## Claims

### Claim 1

A composition for protecting wheat and barley from injury caused by a 6-(trisubstituted phenyl)-4-amino-2-pyridine-carboxylate herbicide of the formula (I)
wherein hal represents F, Cl or Br, and R represents methyl or ethyl,
and its agriculturally acceptable salt, ester and amide derivatives which comprises the 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide and cloquintocet acid, in a weight ratio of 6-(trisubstituted aryl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid of from 2:1 to 64:1; wherein herbicidal injury caused by 6-(trisubstituted phenyl)-4-amino-2-pyridine-carboxylate is reduced by cloquintocet acid.

### Claim 2 (depends on 1)

The composition of claim 1 in which the 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide is a 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-2-pyridinecarboxylic acid derivative or a 4-amino-3-chloro-6-(2,4-dichloro-3-methoxy-phenyl)-2-pyridinecarboxylic acid derivative.

### Claim 3 (depends on 1)

The composition of claim 1 in which the weight ratio of the 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 4:1 to 32:1.

### Claim 4 (depends on 1)

The composition of claim 1 in which the weight ratio of the 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 8:1 to 64:1.

### Claim 5 (depends on 1)

The composition of claim 1 in which the weight ratio of the 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 8:1 to 16:1.

### Claim 6

A method of protecting wheat and barley from injury caused by applying a 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide of the formula (I)
wherein hal represents F, Cl or Br, and R represents methyl or ethyl,
and its agriculturally acceptable salt, ester and amide derivatives which comprises contacting the wheat and barley with cloquintocet acid, or applying cloquintocet acid to the area under cultivation, in an amount such that the weight ratio of 6-(trisubstituted aryl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 2:1 to 64:1; wherein herbicidal injury caused by 6-(trisubstituted phenyl)-4-amino-2-pyridine-carboxylate is reduced by cloquintocet acid.

### Claim 7 (depends on 6)

The method of claim 6 wherein the 6-(trisubstituted phenyl)-4-amino-2-pyridinecarboxylate herbicide is a 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-2-pyridinecarboxylic acid derivative or a 4-amino-3-chloro-6-(2,4-dichloro-3-methoxy-phenyl)-2-pyridinecarboxylic acid derivative.

### Claim 8 (depends on 6)

The method of claim 6 wherein the amount of cloquintocet acid applied is such that the weight ratio of 6-(trisubstituted aryl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 4:1 to 32:1.

### Claim 9 (depends on 6)

The method of claim 6 wherein the amount of cloquintocet acid applied is such that the weight ratio of 6-(trisubstituted aryl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 8:1 to 64:1.

### Claim 10 (depends on 6)

The method of claim 6 wherein the amount of cloquintocet acid applied is such that the weight ratio of 6-(trisubstituted aryl)-4-amino-2-pyridinecarboxylate herbicide to cloquintocet acid is from 8:1 to 16:1.