HERBICIDAL COMPOSITION CONTAINING CERTAIN PYRIDINE CARBOXYLIC ACIDS AND (2,4-DICHLOROPHENOXY)ACETIC ACID
Herbicidal compositions comprising 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid (I) or a derivative thereof and 2,4-D or a derivative thereof.
1 . A herbicidal composition comprising a herbicidally effective amount of (a) a compound of the formula (I)
or, with respect to the carboxylic acid moiety, an agriculturally acceptable salt, ester, or amide thereof, and (b) 2,4-D, or, with respect to the carboxylic acid moiety, an agriculturally acceptable ester, amide, or salt thereof.
2 . The composition of claim 1 , wherein the composition further comprises a herbicide safener.
3 . The composition of claim 2 , wherein the herbicide safener is cloquintocet mexyl or acid.
4 . The composition of claim 1 , wherein (a) is the benzyl ester, methyl ester, or potassium salt of the compound of formula (I).
5 . The composition of claim 4 , wherein (a) is the methyl ester.
6 . The composition of claim 4 , wherein (b) is the dimethyl amine salt of 2,4 D.
7 . The composition of claim 5 , wherein (b) is the dimethyl amine salt of 2,4 D.
8 . The composition of claim 1 , wherein the carboxylic acid equivalent weight ratio of the compound of formula (I) or salt, ester or amide thereof to 2,4-D or salt, ester, or amide thereof is from 1:100 to 1:3.5.
9 . The composition of claim 1 , wherein the carboxylic acid equivalent weight ratio of the compound of formula (I) or salt, ester or amide thereof to 2,4-D or salt, ester, or amide thereof is from 1:56 to 1:7.
10 . The composition of claim 5 , wherein the carboxylic acid equivalent weight ratio of the methyl ester of the compound of formula (I) to 2,4-D or salt, ester, or amide thereof is from about 1:56 to about 1:7.
11 . The composition of claim 10 , wherein the carboxylic acid equivalent weight ratio is from about 1:27 to about 1:14.
12 . The composition of claim 4 , wherein (a) is the benzyl ester, and the carboxylic acid equivalent weight ratio of the benzyl ester of the compound of formula (I) to 2,4-D or salt, ester, or amide thereof is from about 1:28 to about 1:7.
13 . The composition of claim 4 , wherein (a) is the potassium salt, and the carboxylic acid equivalent weight ratio of the potassium salt of the compound of formula (I) to 2,4-D or salt, ester, or amide thereof is from about 1:56 to about 1:7.
14 . The composition of claim 10 , wherein (b) is the dimethyl amine salt of 2,4-D.
15 . The composition of claim 11 , wherein (b) is the dimethyl amine salt of 2,4-D.
16 . The composition of claim 1 , wherein the composition further comprises an agriculturally acceptable adjuvant or carrier.
17 . The composition of claim 1 , wherein the composition is synergistic under the Colby equation.
18 . A method of controlling undesirable vegetation which comprises contacting the undesirable vegetation or area adjacent to the undesirable vegetation with a herbicidally effective amount the composition of claim 1 .
19 . The method of claim 18 , wherein the composition is a applied post-emergently.
20 . The method of claim 18 , wherein the composition is applied pre-emergently.
21 . The method of claim 18 , wherein the undesirable vegetation is Melochia, Eleusine, Lolium or Panicum.
22 . The method of claim 21 , wherein the undesirable vegetation is MEOPA, ELEIN, LOLMU, or PANDI.
23 . A method of controlling undesriable vegetation comprising contacting the undesirable vegeation, area adjacent to the undesirable vegeation, or soil a herbicidally effective amount of
(a) a compound of the formula (I)
or, with respect to the carboxylic acid moiety, an agriculturally acceptable salt, ester, or amide thereof, and
(b) 2,4-D, or, with respect to the carboxylic acid moiety, an agriculturally acceptable ester, amide, or salt thereof.
24 . The method of claim 23 , wherein (a) is the methyl ester.
25 . The method of claim 24 , wherein (b) is the dimethyl amine salt of 2,4-D.