Herbicidal compositions comprising 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or a derivative thereof and propyzamide

1. A method of controlling undesirable vegetation which comprises contacting the vegetation or the locus thereof with or applying to the soil or water to control the emergence or growth of vegetation a herbicidally effective amount of (a) a compound of formula (I)

or an agriculturally acceptable salt or ester thereof and (b) propyzamide, or a salt thereof; wherein the weight ratio of the compound of formula (I) or an agriculturally acceptable salt or ester thereof to propyzamide, or a salt thereof, is from about 1:600 to about 1:50, and wherein the undesirable vegetation is IPOHE, POLCO, SETFA, VIOTR, or CIRAR.

2. The method of claim 1 , wherein the propyzamide is applied at a rate from about 100 g ai/ha to about 2240 g ai/ha and the compound of formula (I) or agriculturally acceptable salt or ester thereof is applied at a rate from about 1 g ae/ha to about 10 g ae/ha.

3. The method of claim 1 , wherein the propyzamide is applied at a rate from about 250 g ai/ha to about 750 g ai/ha and the compound of formula (I) or agriculturally acceptable salt or ester thereof is applied at a rate from about 1.25 g ae/ha to about 10 g ae/ha.

4. The method of claim 1 , 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, industrial vegetation management and rights-of-way.

5. The method of claim 1 , wherein the undesirable vegetation is immature.

6. The method of claim 1 , wherein the (a) and (b) are applied pre-emergently.

7. The method of claim 1 , wherein the (a) and (b) are applied post-emergently.

8. The method of claim 1 , 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.

9. The method of claim 8 , wherein the tolerant crop possesses multiple or stacked traits conferring tolerance to multiple herbicides or multiple modes-of-action.

10. The method of claim 8 , wherein the undesirable vegetation comprises a herbicide resistant or tolerant weed.

11. The method of claim 10 , 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.

12. The method of claim 11 , 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.

13. The method of claim 1 , wherein (a) is the methyl ester, triethylammonium (TEA) salt, or potassium salt of the compound of formula (I).

14. The method of claim 13 , wherein (a) is the methyl ester of the compound of formula (I).