Synergistic herbicidal composition containing fluroxypyr and cyhalofop, metamifop or profoxydim

• US 8,420,571 B2
• Filed: 10/27/2010
• Issued: 04/16/2013
• Est. Priority Date: 10/28/2009
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Mann, Richard K., Weimer, Monte R., McVeigh-Nelson, ndrea Christine
• Primary Examiner(s): Pryor, Alton
• Application Number:
  US12/913,235
• Publication Number:
  US 20110098181A1
• Time in Patent Office: 902 Days
• Field of Search: None
• US Class Current: 504/130
• CPC Class Codes: A01N 43/18 with sulfur as the ring hetero atom
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 43/76 1,3-Oxazoles; Hydrogenated 1,3-oxazoles

Abstract

An herbicidal composition containing (a) fluoroxypyr and (b) cyhalofop, metamifop or profoxydim provides synergistic control of selected weeds particularly on rice.

Claims

1. A synergistic herbicidal mixture comprising an herbicidally effective amount of (a) fluroxypyr, or an agriculturally acceptable salt or ester thereof, and (b) an ACCase inhibitor herbicide, wherein the ACCase inhibitor herbicide is cyhalofop, or an agriculturally acceptable salt or ester thereof, metamifop, or profoxydim.

2. The mixture of claim 1, comprising the meptyl ester of fluroxypyr.

3. The mixture of claim 1 in which the ACCase inhibitor herbicide is cyhalofop, or an agriculturally acceptable salt or ester thereof, or metamifop.

4. The mixture of claim 3 in which the ACCase inhibitor herbicide is the butyl ester of cyhalofop.

5. The mixture of claim 1 in which the ACCase inhibitor is profoxydim.

6. The mixture of claim 1 in which the weight ratio of fluroxypyr (acid equivalent) to cyhalofop (acid equivalent) is between about 1:

12 and about 16;

1.

7. The mixture of claim 1 in which the weight ratio of fluroxypyr (acid equivalent) to metamifop or profoxydim (active ingredient) is between about 1:

10 and about 75;

1.

8. An herbicidal composition comprising an herbicidally effective amount of the herbicidal mixture of claim 1 and an agriculturally acceptable adjuvant and/or carrier.

9. A method of controlling undesirable vegetation which comprises contacting the vegetation, locus of the vegetation, or water where the undesirable vegetation is to be controlled an herbicidally effective amount of the herbicidal mixture of claim 1.

10. The method of claim 9, wherein the undesirable vegetation is controlled in rice.

11. The method of claim 10, wherein the synergistic herbicidal mixture of claim 1 is applied at an application rate of cyhalofop between about 32 g ae/ha and about 430 g ae/ha and an application rate of fluroxypyr between about 35 g ae/ha and about 560 g ae/ha.

12. The method of claim 9, wherein the undesirable vegetation is barnyardgrass, tighthead sprangletop, Chinese sprangletop, broadleaf signalgrass, winklegrass, or giant foxtail.

13. The mixture of claim 6, in which the weight ratio of fluroxypyr (acid equivalent) to cyhalofop (acid equivalent) ranges from 1:

3.6 to 4.4;

1.

14. The mixture of claim 7, in which the weight ratio of fluroxypyr (acid equivalent) to metamifop (active ingredient) ranges from 1.7:

1 to 27;

1.

15. The mixture of claim 7, in which the weight ratio of fluroxypyr (acid equivalent) to profoxydim (active ingredient) ranges from 2:

1 to 8;

1.

16. The method of claim 10, wherein the synergistic herbicidal mixture of claim 1 is applied at an application rate of metamifop or profoxydim between about 7.5 g ai/ha and about 350 g ai/ha and an application rate of fluroxypyr between about 35 g ae/ha and about 560 g ae/ha.

17. A method of controlling undesirable vegetation which comprises contacting the vegetation, locus of the vegetation, or water where the undesirable vegetation is to be controlled with a synergistically effective amount of (a) fluroxypyr, or an agriculturally acceptable salt or ester thereof, and (b) an ACCase inhibitor herbicide, wherein the ACCase inhibitor herbicide is cyhalofop, or an agriculturally acceptable salt or ester thereof, metamifop, or profoxydim.

18. The method of claim 17, which comprises contacting the vegetation, locus of the vegetation, or water where the undesirable vegetation is to be controlled with asynergistically effective amount of (a) the meptyl ester of fluroxypyr, and (b) the butyl ester of cyhalofop.

19. The method of claim 17, which comprises contacting the vegetation, locus of the vegetation, or water where the undesirable vegetation is to be controlled with a synergistically effective amount of (a) the meptyl ester of fluroxypyr, and (b) metamifop.

20. The method of claim 17, which comprises contacting the vegetation, locus of the vegetation, or water where the undesirable vegetation is to be controlled with a synergistically effective amount of (a) the meptyl ester of fluroxypyr, and (b) profoxydim.