Liquid herbicidal preparations

Abstract

Herbicidal oil dispersions comprising (a) desmedipham and/or phenmedipham, ethofumesate and lenacil, (b) one or more surfactants, c) one or more compounds which as far as possible are polar but at the same time are water-insoluble or have a solubility in water of up to 5 g/l, from the group of fully esterified organic phosphates and fully esterified phosphonates, as solvents, d) optionally further organic solvents, e) optionally further, customary formulating auxiliaries, f) optionally water are stable formulations and are suitable for controlling weeds, particularly for selective control in beet crops.

1 . An herbicidal oil dispersion which comprises
 (a) 1% to 50% by weight of:
 biscarbamate herbicide of the formula (a2) 
   
       
         
           
           
               
               
           
         
         
           ethofumesate of the formula (a3) 
         
       
       
         
           
           
               
               
           
         
         
           and lenacil of the formula (a4) 
         
       
       
         
           
           
               
               
           
         
         (b) 3% to 70% by weight of one or more surfactants, 
         (c) 5% to 70% by weight of phosphoric triesters as solvents selected from one or more compounds:
 (c1.7) phosphoric triesters with alkoxylated short-chain alcohols having 1 to 22 carbon atoms in the alkyl radical and 1 to 30 alkyleneoxy units in the polyalkyleneoxy moiety, 
 (c1.8) phosphoric triesters with alkyl alcohols having 5 to 22 carbon atoms, or 
 (c1.9) a reaction product of mono/dibutoxyethyl phosphate and 2 mol of ethylene oxide and/or 2 mol of propylene oxide, 
 
         (d) 0% to 40% by weight of other organic solvents, 
         (e) 0% to 20% by weight of other, customary formulating auxiliaries, and 
         (f) 0% to 20% by weight of water. 
       
     
     
         2 . The oil dispersion as claimed in  claim 1 , which comprises one or more surfactants based on carbocyclic aromatics (b1) or based on a non-aromatic basis (b2), or a mixture of surfactants based on an aromatic basis (b1) and based on a nonaromatic basis (b2) respectively, as the surfactants (b). 
     
     
         3 . The oil dispersion as claimed in  claim 1 , which comprises one or more surfactants (b) based on carbocyclic aromatics (b1) selected from the following groups:
 (b1.1) phenols, phenyl (C1-C4)alkyl ethers or (poly)alkoxylated phenols,   (b1.2) (poly)alkylphenols or (poly)alkylphenol alkoxylates,   (b1.3) polyarylphenols or polyarylphenol alkoxylates,   (b1.4) compounds which represent the reaction products of the molecules described under (b1.1) to (b1.3) with sulfuric acid or phosphoric acid, and their salts neutralized with suitable bases, or   (b1.5) acidic (poly)alkyl- and (poly)aryl-benzenesulfonates and such neutralized with suitable bases.   
     
     
         4 . The oil dispersion as claimed in  claim 1 , which comprises one or more aromatic-based surfactants (b1) selected from the following group:
 phenol reacted with 4 to 10 mol of ethylene oxide,   triisobutylphenol, tri(sec-butyl)phenol or tri(n-butyl)phenol reacted with 4 to 50 mol of ethylene oxide,   nonylphenol reacted with 4 to 50 mol of ethylene oxide,   tristyrylphenol reacted with 4 to 150 mol of ethylene oxide, or   acidic (linear) dodecylbenzenesulfonate.   
     
     
         5 . The oil dispersion as claimed in  claim 1 , wherein component (c) is tributoxyethyl phosphate. 
     
     
         6 . The oil dispersion as claimed in  claim 1 , which comprises
 (a) 10% to 40% by weight of active ingredients (a-2) to (a4),   (b) 5% to 70% by weight of surfactants,   (c) 10% to 70% by weight of phosphoric triesters,   (d) 0% to 40% by weight of other solvents, and   (e) 0% to 20% by weight of other, customary formulating auxiliaries.   
     
     
         7 . The oil dispersion as claimed in  claim 1 , which comprises the active ingredients (a) in a weight ratio (a2):(a3):(a4) of (1):(0.1):(0.01): to (1):(5):(3). 
     
     
         8 . A method for controlling weeds in beet crops comprising applying the oil dispersion according to  claim 1  to the area where weeds are to be controlled. 
     
     
         9 . A process for preparing the oil dispersion according to  claim 1 , comprising mixing the components with one another. 
     
     
         10 . A method of controlling unwanted plant growth, which comprises applying an effective amount of the oil dispersion according to  claim 1  to plants, plant parts or cultivation area.