Herbicidal composition

Abstract

In a herbicidal composition containing a sulfonylurea compound of the formula (I): a carboxymethylcellulose salt, a ligninsulfonic acid salt, a surfactant and water, growth of particle of the sulfonylurea compound suspended in the herbicidal composition scarcely occurs after the storage.

1 . A herbicidal composition comprising a sulfonylurea compound of the formula (I): 
     
       
         
         
             
             
         
       
     
     (wherein, R 1  represents a halogen atom and R 2  represents a C 2-4  alkyl group or cyclopropyl group.)
 a carboxymethylcellulose salt, 
 a ligninsulfonic acid salt, 
 a surfactant and 
 water (excluding aqueous suspended herbicidal compositions containing an effective amount of pyraclonil). 
 
   
   
       2 . The herbicidal composition according to  claim 1 , wherein the amount of the sulfonylurea herbicidal active compound of the formula (I) is 0.5 to 50 wt %, the amount of the carboxymethylcellulose salt is 0.01 to 5 wt %, the amount of the ligninsulfonic acid salt is 0.05 to 5 wt % and the amount of the surfactant is 0.1 to 10 wt %, based on the aqueous suspended herbicidal composition. 
   
   
       3 . The herbicidal composition according to  claim 1  or  2  wherein, R 1  represents a chlorine atom and R 2  represents a propyl group in the sulfonylurea herbicidal active compound of the formula (I). 
   
   
       4 . The herbicidal composition according to  claim 1  or  2 , wherein the carboxymethylcellulose salt is a carboxymethylcellulose salt having a degree of etherification in the range of 0.4 to 1.0. 
   
   
       5 . The herbicidal composition according to  claim 1  or  2 , wherein the ligninsulfonic acid salt is a ligninsulfonic acid salt having a degree of sulfonation of 2.5 or less. 
   
   
       6 . The herbicidal composition according to  claim 1  or  2 , wherein the surfactant is a combination of at least one anionic surfactant and at least one nonionic surfactant.