Synergistic herbicidal compositions

Abstract

Herbicidal compositions comprising A) 2-[2-chloro-3-(2,2,2-trifluoroethoxymethyl)-4-methylsulfonyl-benzoyl]cyclohexane-1,3-dione and B) at least one compound from the group consisting of ethoxysulfuron, flumetsulam, halosulfuron, imazamox, imazapyr, imazaquin, imazethapyr, metosulam, nicosulfuron, primisulfuron, prosulfuron, rimsulfuron, thifensulfuron-methyl, triflusulfuron, foramsulfuron, ametryne, atrazine, bromoxynil, cyanazine, diuron, hexazinone, metribuzin, pyridate, terbuthylazine, 2,4-D, clopyralid, dicamba, diflufenzopyr, fluroxypyr, butylate, EPTC, fenoxaprop-P-ethyl, acetochlor, alachlor, dimethenamid, flufenacet, mefenacet, metolachlor, thenylchlor, S-metolachlor, fluthiacet-methyl, carfentrazone-ethyl, isoxaflutole, mesotrione, sulcotrione, 4-(4-trifluoromethyl-2-methylsulfonylbenzoyl)-5-hydroxy-1-methyl-3-methylpyrazole, glyphosate, pendimethalin, trifluralin, asulam, triaziflam, diflufenican and glufosinate-ammonium against monocotyledonous and/or dicotyledonous harmful plants are described. The activity of these compositions is superior to that of the herbicides applied individually.

1 . A herbicidal composition, comprising a synergistically effective amount of 
 A) the compound 2-[2-chloro-3-(2,2,2-trifluoroethoxymethyl)-4-methylsulfonyl-benzoyl]cyclohexane-1,3-dione or an agriculturally suitable salt thereof (component A) and    B) at least one compound (component B) from one of the following groups    B1 inhibitors of the biosynthesis of branched amino acids: ethoxysulfurone, flumetsulam, halosulfuron, imazamox, imazapyr, imazaquin, imazethapyr, metosulam, primisulfuron, prosulfuron, rimsulfuron, thifensulfuron-methyl, triflusulfuron, N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-2-dimethylaminocarbonyl-5-formylaminobenzenesulfonamide(foramsulfuron);    B2 inhibitors of the photosynthesis electron transport: ametryne, cyanazine, diuron, hexazinone, metribuzin, pyridate, terbuthylazine;    B3 synthetic auxins: 2,4-D, clopyralid, dicamba, diflufenzopyr, fluroxypyr,    B4 inhibitors of fatty acid biosynthesis: butylate, EPTC, fenoxaprop-P-ethyl;    B5 inhibitors of cell division: acetochlor, alachlor, dimethenamid, flufenacet, mefenacet, metolachlor, thenylchlor, S-metolachlor;    B6 inhibitors of protoporphyrinogen oxidase fluthiacet-methyl, carfentrazone-ethyl;    B7 inhibitors of hydroxyphenylpyruvate dioxygenase isoxaflutole, mesotrione, sulcotrione, 4-(4-trifluoromethyl-2-methylsulfonylbenzoyl)-5-hydroxy-1-methyl-3-methylpyrazole;    B8 glyphosate;    B9 pendimethalin;    B10 trifluralin;    B11 asulam;    B12 triaziflam;    B13 diflufenican and    B14 glufosinate-ammonium,    where this composition comprises the component A or a salt thereof and the compounds of group B1 to B14 in a weight ratio of from 1:2000 to 2000:1.    
   
   
       2 . The herbicidal composition as claimed in  claim 1 , which comprises, as component B, ethoxysulfuron, metosulam, primisulfuron, prosulfuron, rimsulfuron or foramsulfuron.  
   
   
       3 . The herbicidal composition as claimed in  claim 1 , which comprises, as component B, terbuthylazine, 2,4-D, clopyralid, dicamba, acetochlor, dimethenamid, flufenacet, metolachlor, S-metolachlor, isoxaflutole, glyphosate, pendimethalin or glufosinate-ammonium.  
   
   
       4 . The herbicidal composition as claimed in  claim 1 , wherein the weight ratio A:B of components A and B is in the range from 1:20 to 50:1.  
   
   
       5 . The herbicidal composition as claimed in  claim 1 , which comprises 0.1-99% by weight of components A and B and 99 to 0.1% by weight of formulating agents customary in crop protection.  
   
   
       6 . The herbicidal composition as claimed in  claim 1 , which comprises a compound of the formula (I) or (II)  
     
       
         
         
             
             
         
       
     
     where R 1  is hydrogen, methyl or ethyl and R 2  is methyl or ethyl.  
   
   
       7 . A method for controlling unwanted vegetation, which comprises applying component A and one or more components B to the harmful plants, to parts of harmful plants or to the area under cultivation, the combination of components A and B being as defined in  claim 1 .  
   
   
       8 . A method for controlling unwanted vegetation, comprising applying to the unwanted vegetation the combination of components A and B being as defined in  claim 1.