ISCEP 2026 At Sunway Putra Hotel 17-18 August 2026
ABSTRACT
ORAL PRESENTATION ABSTRACT
T3.06
EVALUATION OF INSECTICIDE RESISTANCE IN AEDES AEGYPTI FROM KUALA TERENGGANU FOR SUSTAINABLE VECTOR CONTROL
Nur Sofea Kamelia DJAFAR', Suzana MISBAH", Mohd. Khalil JUSOH"
Gal Presectation Scity and Control Approac
Faculty of Marine Science and Environment Universi M
Kuala Terengganu, Teen Mas
Faculty of Marine Science and Environment Univers Malaysia Terengga
Entomology and Pest Lenggan Teresh Malaysia scana martedams mohdi hagmahgary
Dengue fever remains a major public health concern in Malaysia. The disease is transmitted primarily by Aedes aegypt and is exacerbated by high mosquito abundance. Current vector control strategies rely heavily on insecticides; however, their effectiveness is compromised by the emergence of insecticide resistance in mosquito populations. This study aimed to assess the resistance status of Ae. aegypti obtained from PPR Hiliran, Kuala Terengganu, against pirimiphos-methyl, an organophosphate, and cyfluthrin, a pyrethroid insecticide. Before the experiments, laboratory conditions were optimised, maintaining a temperature of 26-28°C and a relative humidity of 60-80% to facilitate mosquito rearing. Eggs of Ae. aegypti were collected using avitraps and reared under these controlled insectary conditions. Emerged adults were morphologically identified and subjected to WHO-standard adult bioassays to assess resistance. The results demonstrated that optimal laboratory conditions supported the production of healthy uniform-aged adult mosquitoes suitable for bioassay testing. Resistance profiling showed that the mosquitoes were resistant to pirimiphos-methyl at 60 mg/m² (81.25% mortality) but susceptible at 120 mg/m² (38.75%), indicating concentration-dependent susceptibility. In contrast, cyfluthrin produced low mortality at both 0.15% (63.79%) and 0.3% (67.5%), confirming pyrethroid resistance according to WHO criteria, highlighting potential challenges for local vector control programmes. This study emphasises the importance of optimised rearing conditions for reliable resistance assessments and provides critical baseline data on A. aegypt insecticide resistance in Kuala Terengganu. The findings can inform evidence-based strategies for managing dengue vectors and contribute to the development of sustainable and effective vector control interventions.
Keywords: Aedes aega dengue, insecticide resistance vector contrel laboratory rearing bioassay
INTERNATIONAL SCIENTIFIC CONFERENCE ON ENTOMOLOGY AND PEST SCEP) 2006