Suspoemulsion of fomesafen and fluthiacet-methyl

Abstract

The present invention provides novel synergistic herbicidal suspoemulsion compositions of fomesafen and fluthiacet-methyl that have superior chemical and physical stability and increased herbicidal action when compared to tank mixtures.

What is claimed is: 
     
         1 . A suspoemulsion composition comprising: a) an aqueous suspension concentrate composition of fomesafen and b) an emulsion in water composition of fluthiacet-methyl. 
     
     
         2 . The suspension concentrate composition of  claim 1  wherein:
 the suspension concentrate composition comprises:
 i) solid fomesafen; 
 ii) a surfactant component; 
 iii) a dispersant component; 
 iv) an antifreeze agent; 
 v) an antifoam agent; 
 vi) a preservative; 
 vii) a thickening agent; 
 
 the emulsion in water composition comprises:
 i) fluthiacet-methyl; 
 ii) a solvent; 
 iii) a surfactant component; 
 iv) a dispersant component; 
 v) an antifreeze agent; 
 vi) an antifoam agent; 
 vii) a preservative; 
 viii) a thickening agent; and 
 ix) an acid. 
 
 
     
     
         3 . The composition of  claim 1  wherein the ratio of fomesafen to fluthiacet-methyl is from 35:1 to 17:1. 
     
     
         4 . The composition of  claim 3  in which the ratio of fomesafen to fluthiacet-methyl is from 24:1 to 26:1. 
     
     
         5 . The composition of  claim 1  wherein fomesafen is present in an amount of 35% to 40% by weight of all the components in the suspension concentrate. 
     
     
         6 . The composition of  claim 1  wherein fluthiacet-methyl is present in an amount of 1% to 2% by weight of all the components in the emulsifiable concentrate. 
     
     
         7 . The composition of  claim 1  wherein the suspension concentrate comprises a surfactant component present in an amount of 3% to 4% by weight of all the components in the suspension concentrate, a dispersant component present in an amount of 2% to 3% by weight of all the components in the suspension concentrate, an antifreeze agent present in an amount of 5% to 7% by weight of all the components in the suspension concentrate, an antifoam agent present in an amount of about 0.1% by weight of all the components in the suspension concentrate, a preservative present in an amount of about 0.15% by weight of all the components in the suspension concentrate and a thickening agent present in an amount of about 0.1% to 0.2% by weight of all the components in the suspension concentrate. 
     
     
         8 . The composition of  claim 1  wherein the emulsifiable concentrate comprises a solvent present in an amount of 45% to 55% by weight of all the components in the emulsifiable concentrate, a surfactant component present in an amount of 4% to 5% by weight of all the components in the emulsifiable concentrate a dispersant component present in an amount of 4% to 6% by weight of all the components in the emulsifiable concentrate, an antifreeze agent present in an amount of 5% to 7% by weight of all the components in the emulsifiable concentrate, an antifoam agent present in an amount of about 0.05% by weight of all the components in the emulsifiable concentrate, a preservative present in an amount of about 0.15% by weight of all the components in the emulsifiable concentrate, a thickening agent present in an amount of 0.01% to 1.0% weight of all the components in the emulsifiable concentrate and an acid present in an amount of 0.01% to 0.1% by weight of all the components in the emulsifiable concentrate.