Increased tolerance of DHT-enabled plants to auxinic herbicides resulting from moiety differences in auxinic herbicide molecular structures

Patent metadata

Field	Value
Publication number	US-9717241-B2
Application number	US-201213345236-A
Country	US
Kind code	B2
Filing date	Jan 6, 2012
Priority date	Jan 7, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The present invention relates to a method of controlling undesirable vegetation in a field containing an auxin-herbicide-tolerant cotton crop by applying to the location where control is desired an effective amount of 2,4-DB.

First claim

We claim:

1. A method for controlling undesirable vegetation in a field containing an aryloxyalkanoate auxin herbicide-tolerant cotton crop while limiting epinastic herbicide injury to the crop, the method comprising:
applying to a location in the crop where control is desired, post-emergent and during the vegetative stage of growth of the plants of the herbicide tolerant cotton crop, an herbicidal treatment consisting of at least 1120 grams acid equivalent/hectare (g ae/ha) 2,4-DB,
wherein no other herbicide is applied to the crop,
wherein the plants of the herbicide tolerant cotton crop comprise a gene coding for AAD-1 (aryloxyalkanoate dioxygenase-1), and
wherein the percentage of the foliage of the herbicide tolerant cotton plants that is epinastic one day after the application of 2,4-DB is less than about 8.6%.

2. The method according to claim 1 , wherein the transgenic aryloxyalkanoate auxin herbicide-tolerant cotton crop comprises at least one further herbicide tolerance gene.

3. A method for controlling undesirable vegetation in a field containing an aryloxyalkanoate auxin herbicide-tolerant cotton crop while limiting epinastic herbicide injury to the crop, the method comprising:
applying to a location in a cotton crop containing undesirable vegetation where control of the vegetation is desired, post-emergent and during the vegetative stage of growth of the plants of the herbicide tolerant cotton crop, an herbicidal treatment consisting of at least 1120 grams acid equivalent/hectare (g ae/ha) 2,4-DB,
wherein no herbicide other than 2,4-DB is applied to the crop,
wherein the plants of the herbicide tolerant cotton crop comprise a gene coding for AAD-1 (aryloxyalkanoate dioxygenase-1),
wherein the undesirable vegetation comprises a weed species selected from the group consisting of Desmodium tortuosum (DEDTO), Mollugo verticallata (MOLVE), Acalypha ostryifolia (ACCOS), Acanthospermum hispidum (ACNHI), Cassia obtusifolia (CASOB), Ipomoea sp. (IPOSS), Ipomoea hederacea (IPOHG), Richardia scabra (RCHSC), and Sesbania exaltata (SEBEX), and
wherein the percentage of the foliage of the herbicide tolerant cotton plants that is epinastic one day after the application of 2,4-DB is less than about 8.6%.

4. The method according to claim 3 , wherein the undesirable vegetation comprises a weed species selected from the group consisting of Acalypha ostryifolia (ACCOS), Acanthospermum hispidum (ACNHI), Cassia obtusifolia (CASOB), Ipomoea sp. (IPOSS), Ipomoea hederacea (IPOHG), Richardia scabra (RCHSC), and Sesbania exaltata (SEBEX).

Assignees

• Richburg John S
• Wright Terry R
• Braxton Leon B
• Robinson Andrew E
• Dow Agrosciences Llc

Inventors

• Richburg John S
• Wright Terry R
• Braxton Leon B
• Robinson Andrew E

Classifications

• A01N39/04

  Aryloxy-acetic acids; Derivatives thereof · CPC title

• A01N39/02 Primary

  Aryloxy-carboxylic acids; Derivatives thereof · CPC title

• C12N15/00

  Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor (mutants or genetically engineered microorganisms, per se C12N1/00, C12N5/00, C12N7/00; new plants per se A01H; plant reproduction by tissue culture techniques A01H4/00; new animals per se A01K67/00; use of medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases, gene therapy A61K48/00) · CPC title

• A01N33/12

  Quaternary ammonium compounds · CPC title

• A01N43/40

  six-membered rings · CPC title