Fumigation is done with the help of Aluminium Phosphide & Methyl bromide.It is a method of pest control that completely fills an area with gaseous pesticides—or fumigants—to suffocate or poison the pests within.This process can be used to control pests in buildings (structural fumigation), soil, grain, and produce, and is also used during processing of goods to be imported or exported to prevent transfer of exotic organisms.