Synergistic herbicidal compositions comprising mesotrione

Abstract

The present invention relates to a synergistic herbicidal composition comprising; (A) mesotrione, and: (B) a second herbicide selected form; (B1) triazines (B2) triazolinones (B3) triazinones (B4) imidazolinones (B5) dicamba (B6) flumetsulam (B7) trifloxysulfuron (B8) tritosulfuron (B9) triasulfuron (B10) pyriftalid (B11) prosulfocarb (B12) pretilachlor (B13) cinosulfuron, or their herbicidally effective salts. A method of controlling th growth of undesirable vegetation, particularly in crops, using this synergistic composition is also disclosed.

What is claimed is:  
     
         1 . A synergistic herbicidal composition comprising; 
 (A) mesotrione, and:    (B) a second herbicide selected from;    (B1) triazines    (B2) triazolinones    (B3) triazinones    (B4) imidazolinones    (B5) dicamba    (B6) flumetsulam    (B7) trifloxysulfuron    (B8) tritosulfuron    (B9) triasulfuron    (B10) pyriftalid    (B11) prosulfocarb    (B12) pretilachlor    (B13) cinosulfuron    or their herbicidally effective salts.    
     
     
         2 . An herbicidal composition according to  claim 1 , wherein component (B) is terbuthylazine, simazine, dicamba, flumetsulam, imazamox, imazapyr, imazethapyr, metribuzin, trifloxysulfuron or pyriftalid.  
     
     
         3 . An herbicidal composition according to  claim 1 , wherein the weight ratio of component (A) to component (B) is between about 32:1 and about 1:20.  
     
     
         4 . An herbicidal composition according to  claim 3 , wherein the weight ratio of component (A) to component (B) is between about 8:1 and 1:15.  
     
     
         5 . An herbicidal composition according to  claim 4 , wherein the weight ratio of component (A) to component (B) is between about 4:1 and about 1:10.  
     
     
         6 . A method for controlling undesirable vegetation, comprising applying to the locus of such vegetation a herbicidally effective amount of a composition as claimed in  claim 1   
     
     
         7 . A method according to  claim 8 , wherein the combined amount of components (A) and (B) applied to the locus of the undesirable vegetation is between about 0.005 kg/ha and about 5.0 kg/ha.  
     
     
         8 . A method according to  claim 7 , wherein the combined amount of components (A) and (B) applied to the locus of the undesirable vegetation is between about 0.5 kg/ha and 3.0 kg/ha.  
     
     
         9 . A method according to  claim 8 , wherein the combined amount of components (A) and (B) applied to the locus of the undesirable vegetation is at least 1.0 kg/ha, and wherein at least 0.02 kg/ha of component (A) is applied to the locus of the undesirable vegetation.