Herbicide composition

Patent metadata

Field	Value
Publication number	US-9456604-B2
Application number	US-99721709-A
Country	US
Kind code	B2
Filing date	Jun 8, 2009
Priority date	Jun 9, 2008
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

The present invention relates to a method of selectively controlling weeds at a locus comprising crop plants and weeds, wherein the method comprises application to the locus of a weed controlling amount of an aqueous spray composition comprising a compound of formula (I) wherein R 1 is selected from the group consisting of C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 haloalkenyl, C 2 -C 6 alkynyl, C 2 -C 6 haloalkynyl, C 3 -C 6 cycloalkyl, C 1 -C 6 haloalkyl, C 1 -C 4 alkoxy-C 1 -C 4 alkyl and C 1 -C 4 alkoxy- C 1 -C 4 alkoxy-C 1 -C 4 alkyl; and R 2 is C 1 -C 6 haloalkyl; or an agriculturally acceptable salt therefore; wherein in the pH of the spray composition is from about 5 to about 9. The invention further relates to a liquid substantially non-aqueous herbicide composition comprising a compound of formula (I) as defined above and a pH adjuster, and to the use of a pH adjuster to reduce the phytotoxicity of a compound of formula (I) in crop plants.

First claim

The invention claimed is:

1. A method of improving the selective weed control of a compound of formula I, at a locus comprising crop plants and weeds, wherein the method comprises application to the locus of a weed a controlling amount of an aqueous spray composition comprising (i) 200-400 g/ha of the compound of formula I

wherein R 1 is methoxy-ethoxy-methyl-; and R 2 is CF 3 ; or an agriculturally acceptable salt thereof, (ii) an optional additional pesticide, and (iii) a pH adjuster, wherein the pH adjuster is triethanolamine or diethanolamine; and wherein the pH of the spray composition is from about 5 to about 8; and wherein the pH adjuster within the aqueous spray composition decreases the phytotoxicity of the compound of formula I to the crop plants.

2. The method according to claim 1 , wherein the aqueous spray composition comprises the additional pesticide.

3. The method according to claim 2 , wherein the additional pesticide is a herbicide selected from the group consisting of ametryn, terbuthylazine, atrazine, alachlor, acetochlor, fomesafen, mesotrione, dicamba, nicosulfuron, rimsulfuron, hexazinone, metolachlor, S-metolachlor, glufosinate and glyphosate.

4. The method according to claim 1 , wherein the crop plant is selected from the group consisting of cereals, cotton, oilseed rape, maize, rice, soybeans, sugar beet and sugar cane.

5. The method according to claim 4 , wherein the crop plant is COM.

6. The method according to claim 1 , wherein the application is made post-emergence of the crop.

7. A liquid herbicidal composition having less than 5% v/v water comprising:
(a) a compound of formula I

wherein R 1 is methoxy-ethoxy-methyl-; and R 2 is CF 3 or an agriculturally acceptable salt thereof, said compound of formula I being present in an amount ranging from about 80 to about 300 g/L of said liquid herbicidal composition; and

(b) an optional additional pesticide; and
(c) a pH adjuster, wherein the pH adjuster is triethanolamine or diethanolamine; wherein the pH adjuster is present in the liquid herbicidal composition in an amount effective for providing a spray composition having pH of from about 5 to about 8 when the liquid herbicidal composition is combined with water and/or an aqueous solution.

8. The liquid herbicidal composition according to claim 7 , which is an emulsifiable concentrate.

9. The liquid herbicidal composition according to claim 7 , which comprises the additional pesticide.

10. The liquid herbicidal composition according to claim 9 , wherein the additional pesticide is a herbicide selected from the group consisting of ametryn, terbuthylazine, atrazine, alachlor, acetochlor, fomesafen, mesotrione, dicamba, nicosulfuron, rimsulfuron, hexazinone, metolachlor, S-metolachlor, glufosinate and glyphosate.

11. The liquid herbicidal composition according to claim 9 further comprising a herbicide safener.

Assignees

• Fowler Jeffrey David
• Hall Gavin John
• Formstone Carl Andrew
• Haas Stefan Michael
• Syngenta Crop Protection Llc

Inventors

• Fowler Jeffrey David
• Hall Gavin John
• Formstone Carl Andrew
• Haas Stefan Michael

Classifications

• A01N57/20

  containing acyclic or cycloaliphatic radicals · CPC title

• A01N43/10

  with sulfur as the ring hetero atom · CPC title

• A01N41/06

  Sulfonic acid amides · CPC title

• A01N41/10

  Sulfones; Sulfoxides · CPC title

• A01N37/22

  the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides · CPC title