Stable solid herbicide delivery systems

Abstract

Herbicide delivery systems comprising a potassium salt of a herbicidal carboxylic acid coated onto a solid carrier.

1 - 15 . (canceled) 
     
     
         16 . A herbicide delivery system comprising a solid carrier and a potassium salt of a herbicidal carboxylic acid coated onto the surface of the solid carrier, wherein the potassium salt of the herbicidal carboxylic acid is from about 0.1 gram acid equivalent per kilogram (g ae/kg) to about 100 g ae/kg of the total herbicide delivery system and the coated solid carrier is free flowing and does not cake during storage, wherein the herbicidal carboxylic acid is picloram, wherein the system further comprises aminocyclopyrachlor. 
     
     
         17 . The herbicide delivery system of  claim 16 , wherein the herbicide delivery system is a granule or a pellet. 
     
     
         18 . The herbicide delivery system of  claim 16 , further comprising one or more inert ingredients. 
     
     
         19 . The herbicide delivery system of  claim 16 , further comprising a surfactant. 
     
     
         20 . The herbicide delivery system of  claim 16 , wherein the solid carrier is limestone chips. 
     
     
         21 . The herbicide delivery system of  claim 16 , wherein the herbicidal carboxylic acid is a compound of the formula 
       
         
           
           
               
               
           
         
       
       wherein Ar is a phenyl, pyridine, pyrimidine or quinoline group substituted with one or more substituents selected from halogen, C 1 -C 6  alkyl, C 1 -C 6  haloalkyl, C 1 -C 6  alkoxy, amino, C 1 -C 6  alkylamino, and di(C 1 -C 6  alkyl)amino. 
     
     
         22 . The herbicide delivery system of  claim 16 , wherein the weight ratio of the solid carrier to the herbicidal carboxylic acid, on an acid equivalent basis, ranges from about 1000:1 to about 10:1. 
     
     
         23 . The herbicide delivery system of  claim 16 , wherein the weight ratio of the solid carrier to the herbicidal carboxylic acid, on an acid equivalent basis, ranges from about 55:1 to about 40:1.