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IRT or Indoor residual Spraying is the process of spraying the inside of dwellings with an insecticide to kill pesky insects. A dilute solution of insecticide is sprayed on the inside walls of certain types of dwellings-those with walls made from porous materials such as mud or wood but not plaster as in city dwellings.


Bed bugs and other insects are killed or repelled by the spray, preventing the transmission of the disease.

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