Assessment of the susceptibility status of Aedes albopictus (Diptera: Culicidae) from Interior, Sandakan and Tawau divisions of Sabah, Malaysia based on WHO diagnostic doses of larvicides
Document Type
Article
Publication Date
6-1-2021
Abstract
Susceptibility status of Aedes albopictus (Skuse) sampled from residential areas in Interior, Sandakan and Tawau divisions of Sabah, Malaysia, was evaluated based on the WHO-recommended doses of organochlorine and organophosphate larvicides. To determine susceptibility status, larval bioassays were carried out and post 24-hour mortalities based on WHO resistance classifications were adopted. The results demonstrated that Ae. albopictus larvae were resistant toward 5 out of the 8 larvicides tested. Larvae from all populations were resistant against bromophos, fenitrothion, malathion, temephos and dichlorodiphenyltrichloroethane (DDT), with mortalities ranging from 0.00 to 89.33%. Dieldrin, on the other hand, could induce 100.00% mortalities in all populations, followed by fenthion and chlorpyrifos, with mortalities ranging from 97.33 to 100.00% and 81.33 to 100.00% respectively. Despite most populations exhibiting similitude in their resistance status, larvae from Sandakan exhibited the highest resistance level whereas the lowest level was observed in Keningau. In view of the inadequacy of some larvicides in controlling Ae. albopictus in this study, integrated management such as insecticide rotation or combination of interventions is warranted.
Keywords
Aedes albopictus, Organochlorine, Organophosphate, Sabah, Malaysia
Divisions
Science
Funders
Universiti Malaya Research Grant (UMRG)[RP021B/16SUS],Higher Institution Center of Excellence (HICoE) Program Research Grant[MO002-2019]
Publication Title
Tropical Biomedicine
Volume
38
Issue
2
Publisher
Malaysian Society of Parasitology and Tropical Medicine
Publisher Location
21-5-2, BLOCK, E, DIAMOND SQUARE, JALAN 3-50, OFF JALAN GOMBAK, KUALA LUMPUR, MALAYSIA