insecticide resistance in adult culex quinquefasciatus mosquitoes from olongapo city, philippines. | culex quinquefasciatus mosquitoes were collected from sites in olongapo city, zambales province, philippines and tested against concentrations of malathion, ddt and dieldrin. high resistance was noted to 4% ddt and 4% dieldrin, but the mosquitoes were susceptible to 5% malathion. | 1983 | 6658510 |