Herbicidal composition

• US 6,849,575 B2
• Filed: 02/25/2002
• Issued: 02/01/2005
• Est. Priority Date: 02/26/2001
• Status: Expired due to Fees

• Current Assignee: Syngenta Crop Protection Incorporated (China National Chemical Corporation)
• Original Assignee: Syngenta Crop Protection Incorporated (China National Chemical Corporation)
• Inventors: Torrent, Marlène, Schlatter, Christian, Haesslin, Hans Walter
• Primary Examiner(s): CLARDY, S
• Application Number:
  US10/468,548
• Publication Number:
  US 20040082476A1
• Time in Patent Office: 1,072 Days
• Field of Search: 504/105, 504/258, 504/363
• US Class Current: 504/105
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: 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
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 43/42 condensed with carbocyclic rings

Abstract

A herbicidal composition in the form of a two-phase aqueous emulsion which comprises,

• • a) as organic phase, a solution of a herbicidally effective amount of the compound 2-(4-(3-chloro-5-fluoro-2-pyridyloxy)-phenoxy-propionic acid propargyl ester in a hydrophobic solvent and a substantially water-insoluble and hydrolysis-stable oil phase stabiliser and,
  • b) as aqueous phase, a solution of at least one surface-active compound and/or dispersing agent and a pH buffer in water.

Claims

1. A herbicidal composition in the form of an aqueous emulsion which comprises

a), as organic phase, a solution of a herbicidally effective amount of the compound 2-(4-(5-chloro-3-fluoro-2-pyridyloxy)-phenoxy-propionic acid propargyl ester in a hydrophobic solvent and a substantially water-insoluble and hydrolysis-stable oil phase stabiliser and

b), as aqueous phase, a solution of a pH buffer and at least one surface-active compound and/or dispersing agent in water.

2. A composition according to claim 1, which comprises an amount, effective for antagonism of the herbicide, of 2-(5-chloroquinolin-8-yloxy)-1-methylhexyl ester, its free acid or a salt thereof of formula

wherein M is a mono-, bi- or tri-valent metal, ammonium, N(R)₄ or HN(R)₃, wherein the substituents R are identical to or different from one another and are C₁-C₁₆alkyl or C₁-C₁₆-hydroxyalkyl, or M is S(R₁)₃ or P(R₁)₄, wherein the substituents R₁ are identical to or different from one another and are C₁-C₂₀alkyl, C₂-C₂₀alkenyl, C₂-C₂₀alkynyl, aryl substituted by C₁-C₂₀alkyl, C₂-C₂₀alkenyl or by C₂-C₂₀ alkynyl or heteroaryl substituted by C₁-C₂₀alkyl, C₂-C₂₀alkenyl or by C₂-C₂₀alkynyl, or 2 substituents R₁ together with the sulfur or phosphorus atom to which they are bonded form a 5- or 6-membered ring.

3. A composition according to claim 1, which comprises an amount, effective for antagonism of the herbicide, of 2-(5-chloroquinolin-8-yloxy)-1-methylhexyl ester.

4. A method of controlling undesired plant growth, which comprises applying a herbicidally effective amount of a composition according to claim 1 to the plants or to the locus thereof.