Synergistic weed control from applications of aminocyclopyrachlor and fluroxypyr

• US 9,307,762 B2
• Filed: 09/27/2013
• Issued: 04/12/2016
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Corteva Agriscience LLC (Corteva, Inc.)
• Original Assignee: Dow Agrosciences LLC (Corteva, Inc.)
• Inventors: Mann, Richard K., Brinkworth, Louise A., Langston, Vernon B., Masters, Robert A., Fisher, Marc L., Ovalle, Daniel, Posada, Eduardo, Peterson, Vanelle F.
• Primary Examiner(s): PAK, JOHN D
• Application Number:
  US14/038,898
• Publication Number:
  US 20140094366A1
• Time in Patent Office: 928 Days
• Field of Search: 504/130, 504/134
• US Class Current: 1/1
• 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 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) fluoroxypyr, 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) fluoroxypyr, 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) fluroxypyr, 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, wherein the acid equivalent weight ratio of (a) to (b) is from 1:

6 to 1;

1, and

wherein the undesirable vegetation includes buckhorn plantain, common guava, calvary clover, shepherd'"'"'s purse, yellow star thistle, or cat'"'"'s-ear dandelion.

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 fluroxypyr-meptyl.

5. The method of claim 1, wherein the undesirable vegetation is controlled in corn or maize, sorghum, oats, wheat, barley, rice, cereals, CRP, trees and vines, grasses grown for seed, pastures, grasslands, rangelands, IVM, fallow land, wildlife management areas, forestry, roadsides, railroads, sugarcane, rights-of-way, 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, and 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 the undesirable vegetation is resistant to auxinic herbicides.

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

10. The method of claim 1, wherein (b) is applied in an amount of from 15-560 g ae/ha.

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

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

1 to 1;

2.