Susceptibility status of aedes aegypti L to temephos and evaluation of light traps against night biting mosquitoes

Name: Manop Saeung

LCSH: Kasetsart University -- Theses. M.S. (Entomology) 2019

Classification :.LCCS: QL536

LCSH: Kasetsart University. -- Department of Entomology -- Theses

LCSH: Aedes

LCSH: Mosquitoes -- Control

LCSH: Insect traps

LCSH: Insecticide resistance

Abstract: Control and prevention of dengue relies on the application of larvicides to control dengue vector mosquitoes. Temephos is currently one of the most commonly used larvicides in Thailand and surrounding countries. However, repeated use of termephos may result in selection for resistance in vector populations, thus compromising operational intervention. Data from 345 collection sites are included: 283 from literature review (244 sites with Ae. aegypti (L.), 21 with Ae. albopictus (Skuse), and 18 having both species sampled), plus 62 locations with Ae. aegypti in Thailand conducted between 2014 and 2018. Susceptibility assays followed WHO guidelines using the recommended discriminating dose of temephos (0.012 mg/liter) against late third to early fourth instar Ae. aegypti. Findings revealed 34 locations with susceptible Ae. aegypti, 13 with suspected resistance, and 15 indicating resistance. Published data between 1999 and 2019 in Thailand found Ae. aegypti resistant in 73 of 206 collection sites, whereas 3 locations from 11 sampled with low-level resistant in Ae. albopictus. From surrounding countries conducting temephos assays (Cambodia, Lao PDR, Myanmar, Malaysia, and Singapore), resistance is present in Ae. aegypti and Ae. albopictus from 27 of 56 and 19 of 28 locations, respectively. Routine insecticide susceptibility monitoring should be an operational requirement in vector control programs. Nowadays, a variety of alternative trapping methods have been developed for use in mosquito surveillance programs. Light-baited suction traps are one of the most widely used tools for vector surveillance. However, no information about the effective light trap at various spectral colors to capture adult mosquitoes has been investigated in Thailand. The aim of the present study was to compare the efficacy of Light-Emitting Diode (LED) (blue, green, yellow, and red) with the two fluorescents (UV and white). Latin square design study was used to compare the six light traps with various spectral colors in the six study sites within the Kasetsart University (KU) campus. On 36 collection nights, 2,387 mosquitoes were caught consisting of five genera: Aedes, Anopheles, Armigeres, Culex, and Mansonia with the most predominance genus being Culex (93.92%). Most of them 1,544 (64.7%) were captured from a light trap equipped with fluorescent UV light source. We conclude that light trap equipped with a fluorescent UV light source was deemed the most efficacies in capturing nocturnal mosquito species in the urban area.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Theeraphap Chareonviriyaphap

Role: Thesis Advisor

Name: Michael John Bangs

Role: Thesis CO-Advisor

Created: 2019

Modified: 2025-07-07

Issued: 2025-07-07

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/0error/2562/manop-sae-all.pdf

CallNumber: QL536 .M36

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Entomology

Grantor: Kasetsart University

©copyrights Kasetsart University

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