<prompt> Household insectiside used for malaria-MalathionPyrethrumParis greenPermethrin  <response>: Ans. is a i.e., Malathion Insectisides used for control of malaria are-i Residual sprapy- In residual spray, spraying of houses with residual insectisides is done. Residual insectisides remains active over extended periods i.e., they have residual action even after the time of spray. Commonly used residual insectisides are - Malathion, DDT, Lindane, propoxure OMS-33.ToxicantDosage in gm2Average duration of effectiveness monthsDDT1 to 26 to 12Lindane0-53Malathion23OMS-3323ii Space spray Space sprays are those where the insecticidal formation is sprayed into the atmosphere in the form of a mist or fog to kill insect. Action is short lived and temporary since there is no residual action. The most commonly used space spray insecticide is Pyrethrum. New equipment has been developed to use residual insectiside as space spray by ultra low volume ULV technique. Malathions and fenthion are most commonly used. 