Use of particles in controlling a population of arthropod pests, wherein the particles comprise i) a hydrophobic exterior that adheres to the cuticle of at least one species of an arthropod pest； and ii) at least one pesticide associated with the said particles, wherein the pesticide is present at a weight of no more than 2% of the weight of the particles, populations of particles, methods of producing populations of particles and methods of application of such populations.
