Indoor spraying is effective for 3-6 months
depending on the insecticide used and the type of surface on which it is sprayed. Dicholoro Diphenyl Trichloroethane (DDT) can be effective for 9-12 months in some cases (WHO
Indoor spraying is effective for 3-6 months
depending on the insecticide used and the type of surface on which it is sprayed. Dicholoro Diphenyl Trichloroethane (DDT) can be effective for 9-12 months in some cases (WHO