Microencapsulated organophosphorus insecticidal composition for agricultural use

摘要

A microencapsulated insecticidal composition has excellent residual effect which comprises an organophosphorus insecticide encapsulated in a wall formed of a polyurea and having an average particle diameter of not more than 80 mu m, a wall thickness of not more than 0.3 mu m and a ratio of an average particle diameter/wall thickness of not less than 250.