Synergism of malathion and parathion against resistant insects: phosphorus esters with synergistic properties.
D003465:Culex / Q000187:drug effects*; D004357:Drug Synergism; D006793:Houseflies / Q000187:drug effects*; D066298:In Vitro Techniques; D007305:Insecticide Resistance / Q000494:pharmacology; D007306:Insecticides / Q000472:pathogenicity*; D010278:Parathion / Q000494:pharmacology*
D007306:Insecticides; D010278:Parathion