Synergistic weed control from applications of penoxsulam and mefenacet

• US 9,930,889 B2
• Filed: 12/10/2013
• Issued: 04/03/2018
• Est. Priority Date: 12/12/2012
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Mann, Richard K.
• Primary Examiner(s): Haghighatian, Mina
• Assistant Examiner(s): Chui, Mei Ping
• Application Number:
  US14/102,009
• Publication Number:
  US 20140179531A1
• Time in Patent Office: 1,575 Days
• CPC Class Codes: A01N 37/22 the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides
• CPC Class Codes: A01N 41/06 Sulfonic acid amides
• CPC Class Codes: A01N 43/653 1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
• CPC Class Codes: A01N 43/713 having rings with four or more nitrogen atoms as the only ring hetero atoms
• CPC Class Codes: A01N 43/78 1,3-Thiazoles; Hydrogenated 1,3-thiazoles
• CPC Class Codes: A01N 43/90 having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system

Abstract

Disclosed herein are herbicidal compositions comprising a synergistically herbicidal effective amount of (a) penoxsulam, or an agriculturally acceptable salt thereof, and (b) mefenacet, or an agriculturally acceptable salt thereof. Also disclosed herein are methods of controlling undesirable vegetation in rice, which comprise applying to vegetation or an area adjacent the vegetation or applying to soil or water to prevent the emergence or growth of vegetation (a) penoxsulam, or an agriculturally acceptable salt thereof, and (b) mefenacet, or an agriculturally acceptable salt thereof, wherein (a) and (b) are each added in an amount sufficient to produce a synergistic herbicidal effect.

Claims

1. A method of controlling undesirable vegetation in rice which comprises applying to the undesirable vegetation or an area adjacent the vegetation, or applying to soil or water to control the emergence or growth of the undesirable vegetation, a synergistically herbicidal effective amount of (a) penoxsulam, or an agriculturally acceptable salt thereof, and (b) mefenacet, or an agriculturally acceptable salt thereof,

wherein (a) and (b) are applied in a weight ratio of (a) to (b) from 1:

56 to 1;

42, and

wherein the undesirable vegetation includes barnyard grass, kuro-guwai, common false pimpernel, dwarf arrowhead, or combinations thereof.

2. The method of claim 1, wherein (a) and (b) are applied simultaneously.

3. The method of claim 1, wherein (a) and (b) are applied to water to control the emergence or growth of the undesirable vegetation.

4. The method of claim 1, further comprising applying an additional pesticide.

5. The method of claim 4, wherein the additional pesticide includes one or more pesticides selected from the group consisting of cyhalofop-butyl, bensulfuron-methyl, bentazon -sodium, benzobicyclon, bromobutide, fenoxaprop-ethyl, halosulfuron-methyl, metamifop, metazosulfuron, metsulfuron-methyl, profoxydim, pyrazosulfuron-ethyl, triafamone, and combinations thereof.

6. The method of claim 1, wherein the undesirable vegetation is controlled in flooded rice.

7. The method of claim 1, wherein (a) is applied in an amount of from 5-75 g ai/ha.

8. The method of claim 1, wherein (b) is applied in an amount of from 250-2000 g ai/ha.

9. The method of claim 1 wherein the undesirable vegetation includes kuro-guwai, common false pimpernel, dwarf arrowhead, or combinations thereof.