Fumigation is a method for pest control or removal of harmful microorganisms. It is done by the space with fumigants, or gaseous pesticides, to inflict poison or suffocation on the insects within. It is used to control pests in buildings (structural fumigation), soil, grain, and produce.  fumigants--to suffocate or poison the pests within. It is used to manage insects in structures (structural fumigation) and soil, as well as grain, and even produce.