Synergistic weed control from applications of aminocyclopyrachlor and aminopyralid

• US 9,439,424 B2
• Filed: 09/27/2013
• Issued: 09/13/2016
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Brinkworth, Louise A., Mann, Richard K., Fisher, Marc L., Peterson, Vanelle F., Langston, Vernon B., Masters, Robert A., Halstvedt, Mary B.
• Primary Examiner(s): PAK, JOHN D
• Application Number:
  US14/039,300
• Publication Number:
  US 20140094364A1
• Time in Patent Office: 1,082 Days
• Field of Search: 504/130, 504/136
• US Class Current: 1/1
• CPC Class Codes: A01N 33/02 Amines; Quaternary ammonium compounds
• CPC Class Codes: A01N 43/40 six-membered rings
• CPC Class Codes: A01N 43/54 1,3-Diazines; Hydrogenated 1,3-diazines

Abstract

Disclosed herein are herbicidal compositions comprising a synergistically herbicidal effective amount of (a) aminocyclopyrachlor, or an agriculturally acceptable salt or ester thereof, and (b) aminopyralid, or an agriculturally acceptable salt or ester thereof. Also disclosed herein are methods of controlling undesirable vegetation, 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) aminocyclopyrachlor, or an agriculturally acceptable salt or ester thereof, and (b) aminopyralid, or an agriculturally acceptable salt or ester 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 which comprises applying to vegetation or an area adjacent the vegetation or applying to soil or water to control the emergence or growth of vegetation a composition comprising a herbicidal active ingredient comprising (a) aminocyclopyrachlor, or an agriculturally acceptable salt or ester thereof and (b) aminopyralid, or an agriculturally acceptable salt or ester thereof,

wherein (a) and (b) are each added in an amount sufficient to provide a synergistic herbicidal effect, and

wherein the acid equivalent weight ratio of (a) to (b) is 1:

4 to 10;

1,

wherein the composition comprises at least one agriculturally acceptable adjuvant, and

wherein the undesirable vegetation comprises mock cypress.

2. The method of claim 1, wherein (a) and (b) are applied postemergence to the undesirable vegetation.

3. The method of claim 1, wherein (a) includes aminocyclopyrachlor in acid form.

4. The method of claim 1, wherein (b) includes aminopyralid-triisopropanolammonium.

5. The method of claim 1, wherein the undesirable vegetation is controlled in sugarcane, sugar beet, plantains, fodder brassicas, wheat, barley, corn or maize, sorghum, rice, seed rape, cereals, CRP, trees and vines, grasses grown for seed, pastures, grasslands, rangelands, IVM, fallow land, forestry, wildlife management areas, rights-of-way, aquatics, or turf.

6. The method of claim 1, wherein the undesirable vegetation is controlled in crops tolerant to glyphosate, glufosinate, dicamba, phenoxy auxins, pyridyloxy auxins, aryloxyphenoxypropionates, acetyl CoA carboxylase (ACCase) inhibitors, imidazolinones, acetolactate synthase (ALS) inhibitors, 4-hydroxyphenyl-pyruvate dioxygenase (HPPD) inhibitors, protoporphyrinogen oxidase (PPO) inhibitors, triazines, bromoxynil, or combinations thereof.

7. The method of claim 1, wherein the undesirable vegetation is controlled in phenoxy acid tolerant crops and the phenoxy acid tolerant crops have tolerance conferred by an AAD12 gene.

8. The method of claim 1, wherein (a) is applied in an amount of from 8-240 g ae/ha.

9. The method of claim 1, wherein (b) is applied in an amount of from 3-240 g ae/ha.

10. The method of claim 1, wherein the herbicidal active ingredient consists of (a) aminocyclopyrachlor, or an agriculturally acceptable salt or ester thereof and (b) aminopyralid, or an agriculturally acceptable salt or ester thereof.

11. The method of claim 1, wherein the acid equivalent weight ratio of (a) to (b) is 1:

1 to 2.5;

1.

12. The method of claim 1, wherein the acid equivalent weight ratio of (a) to (b) is 1:

2 to 5;

1.

13. The method of claim 1, wherein the acid equivalent weight ratio of (a) to (b) is 7:

6 to 2;

1.