# US 11,109,592 B2 · Selective weed control methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,109,592 B2 - Document ID: US11109592B2 - Status: Granted - Kind: B2 - Application number: 14/162,902 - Filed: 2014-01-24 - Published: 2014-07-31 - Granted: 2021-09-07 - Earliest claimed: 2013-01-25 - Assignees: Corteva Agriscience LLC - Applicants: Rory Degenhardt; Len Juras; Bill McGregor; Peter Nott; Norbert M. Satchivi; Monte R. Weimer - Inventors: Rory Degenhardt; Len Juras; Bill McGregor; Peter Nott; Norbert M. Satchivi; Monte R. Weimer - Web page: https://patentgrep.com/patent/US11109592B2 ## CPC - A01N 43/40: six-membered rings - A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS ## Abstract 4-Amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid and agriculturally acceptable esters or salts thereof are used in methods for selective post-emergent control of undesirable vegetation in the presence of sunflowers, sorghum, yellow mustard, spring Juncea canola, spring kale, spring turnip, spring rutabaga, spring Winfred forage brassica, or sugar beet. ## Claims ### Claim 1 A method for the selective post-emergent control of undesirable vegetation in the presence of a crop selected from the group consisting of sunflowers, sorghum, yellow mustard, spring kale, spring turnip, spring rutabaga, and spring Winfred forage brassica, which comprises applying a herbicidally effective amount of 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or an agriculturally acceptable ester or salt thereof directly to the undesirable vegetation or to the locus thereof or to the area where control of the undesirable vegetation is desired, wherein the 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or agriculturally acceptable ester or salt thereof is applied at a rate of up to 10 g ae/ha, wherein the 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or an agriculturally acceptable ester or salt thereof is not combined with aminopyralid, wherein the degree of injury to the crop is less than 20% rated visually, and wherein the undesirable vegetation is selected from a group consisting of Amaranthus spp., Fumaria spp., Conyza spp., Geranium spp., Ambrosia spp., Malva spp., Lamium spp., cleavers (Galium aparine), chickweed (Stellaria media), hempnettle (Galeopsis tetrahit), lamb's-quarters (Chenopodium album), Mexican pricklepoppy (Argemone mexicana), stork's-bill (Erodium cicutarium), volunteer flax (Linum usitatissimum), and volunteer alfalfa (Medicago sativa). ### Claim 2 (depends on 1) The method of claim 1, wherein said 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or agriculturally acceptable ester or salt thereof is applied at a rate of up to 5 g ae/ha. ### Claim 3 (depends on 1) The method of claim 1, wherein said 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or agriculturally acceptable ester or salt thereof is applied at a rate of up to 2.5 g ae/ha. ### Claim 4 (depends on 1) The method of claim 1, wherein the crop is sunflowers. ### Claim 5 (depends on 1) The method of claim 1, wherein the crop is sorghum. ### Claim 6 (depends on 1) The method of claim 1, wherein the crop is yellow mustard. ### Claim 7 (depends on 1) The method of claim 1, wherein the crop is spring kale. ### Claim 8 (depends on 1) The method of claim 1, wherein the crop is spring turnip. ### Claim 9 (depends on 1) The method of claim 1, wherein the crop is spring rutabaga. ### Claim 10 (depends on 1) The method of claim 1, wherein the crop is spring Winfred forage brassica. ### Claim 11 (depends on 1) The method of claim 1, wherein the degree of control of the undesirable vegetation is at least 80% rated visually. ### Claim 12 A method for the selective post-emergent control of undesirable vegetation, comprising applying a herbicide or herbicidal composition comprising 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or an agriculturally acceptable ester or salt thereof at an application rate from 2.5 to 10 g ae/ha to a crop selected from the group consisting of sunflowers, sorghum, yellow mustard, spring kale, spring turnip, spring rutabaga, and spring Winfred forage brassica, wherein the herbicide or herbicidal composition is applied directed to the undesirable vegetation or to the locus thereof or to the area where control of the undesirable vegetation is desired, wherein the herbicide or herbicidal composition does not comprise aminopyralid, wherein the degree of injury to the crop is less than or equal to 20% rated visually, and wherein the undesirable vegetation is selected from a group consisting of Amaranthus spp., Fumaria spp., Conyza spp., Geranium spp., Ambrosia spp., Malva spp., Lamium spp., cleavers (Galium aparine), chickweed (Stellaria media), hempnettle (Galeopsis tetrahit), lamb's-quarters (Chenopodium album), Mexican pricklepoppy (Argemone mexicana), stork's-bill (Erodium cicutarium), volunteer flax (Linum usitatissimum), and volunteer alfalfa (Medicago sativa).