Patent ID: 8916520

Claim:
A pesticide formulation, comprising: an organophosphate pesticide; and a polymer forming a capsule wall which at least partially encapsulates the organophosphate pesticide to form a microcapsule, the wall having an average thickness of between about 5 nm to about 10 nm, said microcapsule having an average diameter in the range of about 2 microns to about 3 microns; wherein the wall is formed by an interfacial polycondensation between at least one oil soluble monomer selected from the group consisting of: diisocyanates, polyisocyanates, diacid chlorides, poly acid chlorides, sulfonyl chlorides and chloroformates; and at least one water soluble monomer selected from the group consisting of: diamines, polyamines, water soluble diols and water soluble polyols.