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

Abstract

Herbicidal compositions and methods of controlling undesirable vegetation using a combination of (a) a compound of formula (I): or an agriculturally acceptable salt or ester thereof and (b) propyzamide provide control of undesirable vegetation, e.g., 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, and industrial vegetation management and rights-of-way.

What is claimed is: 
     
         1 . A herbicidal composition comprising a herbicidally effective amount of (a) a compound of formula (I) 
       
         
           
           
               
               
           
         
       
       or an agriculturally acceptable salt or ester thereof and (b) propyzamide. 
     
     
         2 . The composition of  claim 1 , wherein (a) is the methyl ester, triethylammonium (TEA) salt, or potassium salt of compound (I). 
     
     
         3 . The composition of  claim 1 , further comprising a herbicide safener. 
     
     
         4 . The composition of  claim 1 , wherein the weight ratio of compound of formula (I) or agriculturally acceptable salt or ester thereof to propyzamide is from about 1:2240 to about 1:10. 
     
     
         5 . The composition of  claim 1 , wherein the weight ratio of compound of formula (I) or agriculturally acceptable salt or ester thereof to propyzamide is from about 1:600 to about 1:25. 
     
     
         6 . A herbicidal composition comprising a herbicidally effective amount of two and only two herbicidal active ingredients, wherein the herbicidal active ingredients consist of (a) 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)pyridine-2-carboxylic acid or an agriculturally acceptable ester or salt thereof and (b) propyzamide, and the weight ratio of compound of formula (I) or agriculturally acceptable salt or ester thereof to propyzamide is from about 1:10 to about 1:600. 
     
     
         7 . The herbicidal composition of  claim 1 , wherein the composition is synergistic as determined by the Colby equation. 
     
     
         8 . A method of controlling undesirable vegetation which comprises contacting the vegetation or the locus thereof with or applying to the soil to prevent the emergence or growth of vegetation the composition of  claim 1 . 
     
     
         9 . A method of controlling undesirable vegetation which comprises contacting the vegetation or the locus thereof with or applying to the soil or water to prevent the emergence or growth of vegetation a herbicidally effective amount of a compound of the formula (I) 
       
         
           
           
               
               
           
         
       
       or an agriculturally acceptable salt or ester thereof and
 (b) propyzamide, or a salt thereof. 
 
     
     
         10 . The method of  claim 9 , 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. 
     
     
         11 . The method of  claim 9 , 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. 
     
     
         12 . The method of  claim 9 , 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. 
     
     
         13 . The method of  claim 9 , wherein the undesirable vegetation is immature. 
     
     
         14 . The method of  claim 9 , wherein the (a) and (b) are applied pre-emergently. 
     
     
         15 . The method of  claim 9 , wherein the (a) and (b) are applied post-emergently. 
     
     
         16 . The method of  claim 9 , 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. 
     
     
         17 . The method of  claim 16 , wherein the tolerant crop possesses multiple or stacked traits conferring tolerance to multiple herbicides or multiple modes-of-action. 
     
     
         18 . The method of  claim 16 , wherein the undesirable vegetation comprises a herbicide resistant or tolerant weed. 
     
     
         19 . The method of  claim 18 , 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. 
     
     
         20 . The method of  claim 19 , 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. 
     
     
         21 . The method of  claim 9 , wherein the undesirable vegetation is GLXMA, IPOHE, ABUTH, POLCO, SETFA, BRSNW, AMARE, EPHHL, CHEAL, STEME, VIOTR, CIRRAR, GERSS, POAAN, or VERSS.