HERBICIDAL COMPOSITIONS COMPRISING 4-AMINO-3-CHLORO-6-(4-CHLORO-2-FLUORO-3-METHOXYPHENYL) PYRIDINE-2-CARBOXYLIC ACID OR A DERIVATIVE THEREOF AND CERTAIN TRIAZOLOPYRIMIDINE SULFONAMIDES

1 . A herbicidal composition comprising a herbicidally effective amount of (a) a compound of the formula (I)

or an agriculturally acceptable salt or ester thereof and (b) diclosulam or clorasulam-methyl or an agriculturally acceptable salt thereof.

2 . The composition of claim 1 , wherein no additional herbicidal active ingredients are present in the composition.

3 . The composition of claim 1 , wherein (a) is a C 1 -C 4 alkyl or benzyl ester of compound (I).

4 . The composition of claim 1 , wherein (a) is a methyl ester or potassium salt of compound (I).

5 . The composition of claim 1 , wherein (a) is the carboxylic acid of formula (I).

6 . The composition of claim 1 , wherein (a) is the methyl ester of the compound of formula (I) and (b) is cloransulam-methyl.

7 . The composition of claim 1 , wherein (a) is the methyl ester of the compound of formula (I) and (b) is diclosulam.

8 . The composition of claim 1 , further comprising a herbicide safener.

9 . The composition of claim 1 , wherein (b) is cloransulam-methyl or an agriculturally acceptable salt thereof and the weight ratio of (a) to (b) is from about 1:35 to about 5:1.

10 . The composition of claim 1 , wherein (b) is cloransulam-methyl or an agriculturally acceptable salt thereof and the weight ratio of the compound of (a) to (b) is from about 1:20 to about 1.25:1.

11 . The composition of claim 1 , wherein (b) is diclosulam or an agriculturally acceptable salt thereof and the weight ratio of (a) to (b) is from about 1:35 to about 5:1.

12 . The composition of claim 1 , wherein (b) is diclosulam or an agriculturally acceptable salt thereof and the weight ratio of the compound of (a) to (b) is from about 1:20 to about 1.25:1.

13 . The composition of claim 1 , further comprising an agriculturally acceptable adjuvant or carrier.

14 . The composition of claim 1 , wherein the composition is synergistic as determined by the Colby equation.

15 . A method of controlling undesirable vegetation which comprises applying the composition of claim 1 .

16 . A method of controlling undesirable vegetation which comprises applying a herbicidally effective amount of a herbicidal composition comprising:

(a) a compound of the formula (I)

or an agriculturally acceptable salt or ester thereof and

(b) diclosulam or clorasulam-methyl or an agriculturally acceptable salt thereof.

17 . The method of claim 16 , wherein no additional herbicidal active ingredients are present in the composition.

18 . The method of claim 16 , wherein the undesirable vegetation is controlled in winter/spring oilseed rape, winter/spring canola, vegetables, Brassica spp, ornamentals, rice, wheat, triticale, barley, oats, rye, sorghum, corn/maize, sunflower, row crops, pastures, grasslands, rangelands, fallowland, sugarcane, turf, tree and vine orchards, aquatics, and industrial vegetation management and rights-of-way.

19 . The method of claim 16 , wherein the undesirable vegetation is immature.

20 . The method of claim 16 , wherein the (a) and (b) are applied pre-emergently.

21 . The method of claim 16 , wherein the (a) and (b) are applied post-emergently.

22 . The method of claim 16 , wherein the undesirable vegetation is controlled in a crop that is 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, or bromoxynil.

23 . The method of claim 16 , wherein (a) is the methyl ester of the compound of formula (I), (b) is diclosulam, and the (a) and (b) are applied in a weight ratio of (a) to (b) of from about 1:35 to about 5:1.

24 . The method of claim 16 , wherein (a) is the methyl ester of the compound of formula (I), (b) is clorasulam-methyl, and the (a) and (b) are applied in a weight ratio of (a) to (b) of from about 1:35 to about 5:1.

25 . The method of claim 16 , wherein (a) is the methyl ester of the compound of formula (I), (b) is diclosulam, and the (a) and (b) are applied in a weight ratio of (a) to (b) of from about 1:20 to about 1.25:1.

26 . The method of claim 16 , wherein (a) is the methyl ester of the compound of formula (I), (b) is clorasulam-methyl, and the (a) and (b) are applied in a weight ratio of (a) to (b) of from about 1:20 to about 1.25:1.

27 . The method of claim 22 , wherein the tolerant crop possesses multiple or stacked traits conferring tolerance to multiple herbicides or multiple modes-of-action.

28 . The method of claim 22 , wherein the undesirable vegetation comprises a herbicide resistant or tolerant weed.

29 . The method of claim 28 , wherein the resistant or tolerant weed is a biotype with resistance or tolerance to multiple herbicides, multiple chemical classes, or multiple herbicide modes-of-action.

30 . The method of claim 28 , wherein the resistant or tolerant weed is a biotype resistant or tolerant to acetolactate synthase (ALS) inhibitors, photosystem II inhibitors, acetyl CoA carboxylase (ACCase) inhibitors, synthetic auxins, photosystem I inhibitors, 5-enolpyruvylshikimate-3-phosphate (EPSP) synthase inhibitors, microtubule assembly inhibitors, lipid synthesis inhibitors, protoporphyrinogen oxidase (PPO) inhibitors, carotenoid biosynthesis inhibitors, very long chain fatty acid (VLCFA) inhibitors, phytoene desaturase (PDS) inhibitors, glutamine synthetase inhibitors, 4-hydroxyphenyl-pyruvate-dioxygenase (HPPD) inhibitors, mitosis inhibitors, cellulose biosynthesis inhibitors, herbicides with multiple modes-of-action, quinclorac, arylaminopropionic acids, difenzoquat, endothall, or organoarsenicals.

31 . The method of claim 16 , wherein the undesirable vegetation is VIOTR, STEME, SORVU, or IPOHE.