Novel Formulations of Bifenthrin and Enriched Cypermethrin

Abstract

The present invention is directed to novel insecticidal compositions comprising bifenthrin and enriched cypermethrin, the compositions are physically stable when diluted with water.

1 - 21 . (canceled) 
     
     
         22 . An insecticidal composition comprising:
 a) bifenthrin;   b) enriched cypermethrin;   c) one or more aromatic solvent;   d) one or more nonionic polymeric surfactant;   e) an antifoam agent;   f) a biocide;   g) glycerine; and   h) water.   
     
     
         23 . An insecticidal composition of  claim 22  wherein the enriched cypermethrin is selected from the group consisting of alpha-cypermethrin, beta-cypermethrin, theta-cypermethrin and zeta-cypermethrin. 
     
     
         24 . An insecticidal composition of  claim 23  wherein the enriched cypermethrin is zeta-cypermethrin. 
     
     
         25 . An insecticidal composition of  claim 24  wherein bifenthrin and zeta-cypermethrin are present in a combined amount of from 0.05% to 30% by weight based on the total weight of the formulation. 
     
     
         26 . An insecticidal composition of  claim 25  wherein the ratio of bifenthrin to zeta-cypermethrin is from 1/4 to 4/1. 
     
     
         27 . An insecticidal composition of  claim 22  wherein the aromatic solvent is selected from alkylated naphthalene aromatic solvent and alkylated naphthalene depleted aromatic solvent. 
     
     
         28 . An insecticidal composition of  claim 27  wherein the aromatic solvent is present in a concentration of from 12% to 15% by weight based on the total weight of the formulation 
     
     
         29 . An insecticidal composition of  claim 22  wherein the nonionic polymeric surfactant is selected from the group consisting of an alkyd polyethylene glycol and a polyalkylene glycol ether. 
     
     
         30 . An insecticidal composition of  claim 29  wherein the nonionic polymeric surfactant is present in a concentration of from 8% to 12% by weight based on the total weight of the formulation. 
     
     
         31 . An insecticidal composition of  claim 22  wherein the antifoam agent is present in a concentration of from 0.001% to 1.5% by weight based on the total weight of the formulation. 
     
     
         32 . An insecticidal composition of  claim 22  wherein the biocide is present in a concentration of from 0.001% to 1% by weight based on the total weight of the formulation. 
     
     
         33 . An insecticidal composition of  claim 22  wherein glycerine is present in a concentration of from 5% to 10% by weight based on the total weight of the formulation. 
     
     
         34 . An insecticidal composition of  claim 22  wherein water is present in a concentration of from 40% to 60% by weight based on the total weight of the formulation. 
     
     
         35 . A method for controlling insects comprising applying the composition of  claim 22  to a locus where insects are present or are expected to be present. 
     
     
         36 . An insecticidal composition comprising:
 a) bifenthrin and zeta-cypermethrin present in a ratio of from 1/4 to 4/1 and in a total concentration of from 0.05% to 30%;   b) one or more aromatic solvent present in a concentration of from 12% to 15%;   c) one or more nonionic polymeric surfactant present in a concentration of from 8% to 12%;   d) an antifoam agent in a concentration of from 0.001% to 1.5%;   e) a biocide present in a concentration of from 0.001% to 1.5%;   f) glycerine present in a concentration of from 5% to 10%; and   g) water present in a concentration of from 40% to 60%;   wherein all % are % by weight based on the total weight of all the components in the formulation.   
     
     
         37 . A method for controlling insects comprising applying the composition of  claim 36  to a locus where insects are present or are expected to be present.