Pesticidal emulsifiable concentrate

Abstract

The present invention provides a low-irritant pesticidal emulsifiable concentrate comprising (a) 1 to 60% by weight of at least one pesticidal active ingredient compound selected from the group consisting of pyriproxyfen and a pyrethroid compound, (b) 2 to 15% by weight of at least one surfactant and (c) 15 to 90% by weight of at least one aromatic ester solvent represented by the formula: Ar—X—COOR  [1] or the formula: RCOO—X—Ar  [2] [wherein R represents non-aromatic group having 1 to 6 carbon atoms; Ar represents an aromatic group; and X represents a single bond or an alkylene group having 1 to 6 carbon atoms]. The pesticidal emulsifiable concentrate of the present invention can be used as an emulsion which is superior in emulsion stability when using after diluting with water, and has low irritation.

What is claimed is:  
     
         1 . A pesticidal emulsifiable concentrate comprising 
 (a) 1 to 60% by weight of at least one pesticidal active ingredient compound selected from the group consisting of pyriproxyfen and a pyrethroid compound, (b) 2 to 15% by weight of at least one surfactant and (c) 15 to 90% by weight of at least one aromatic ester solvent represented by the formula:    Ar—X—COOR  [1]   or the formula:    RCOO—X—Ar  [2]   [wherein R represents non-aromatic group having 1 to 6 carbon atoms; Ar represents an aromatic group; and X represents a single bond or an alkylene group having 1 to 6 carbon atoms].    
     
     
         2 . The pesticidal emulsifiable concentrate according to  claim 1 , wherein the pesticidal active ingredient compound (a) is pyriproxyfen.  
     
     
         3 . The pesticidal emulsifiable concentrate according to  claim 1 , wherein the pesticidal active ingredient compound (a) is a pyrethroid compound.  
     
     
         4 . The pesticidal emulsifiable concentrate according to the  claim 1 , wherein the pesticidal active ingredient compound (a) is a compound represented by the formula:  
       
         
           
           
               
               
           
         
       
       [wherein R 1  represents a group of the formula:  
       
         
           
           
               
               
           
         
       
       [Y 1  and Y 2  are same or different and each represents a methyl group, a trifluoromethyl group, a halogen atom or an alkoxycarbonyl group (the number of carbon atoms of the alkoxy group is from 1 to 4); and Z represents a halogen atom or a difluoromethoxy group]; R 2  represents a hydrogen atom or a cyano group; and R 3  represents a hydrogen atom or a fluorine atom].  
     
     
         5 . The pesticidal emulsifiable concentrate according to the  claim 1 ,  2 ,  3  or  4 , wherein the aromatic ester solvent (c) is at least one selected from benzyl acetate, phenyl acetate, p-tolyl acetate, 4-phenylbutyl acetate, methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, isoamyl benzoate, ethyl 2-metylbenzoate, methyl 2-methylbenzoate, ethyl 3-methylbenzoate, ethyl 4-methylbenzoate, ethyl phenylpropionate and ethyl phenylacetate.  
     
     
         6 . The pesticidal emulsifiable concentrate according to  claim 1 ,  2 ,  3 ,  4  or  5 , wherein the surfactant (b) is nonionic surfactant and/or anionic surfactant.  
     
     
         7 . The pesticidal emulsifiable concentrate according to  claim 1 ,  2 ,  3 ,  4 ,  5  or  6 , wherein the amounts of the pesticidal active ingredient compound (a), the surfactant (b) and the aromatic ester solvent (c) are 2 to 40% by weight, 2 to 10% by weight and 20 to 60% by weight, respectively.