1.A comparison of different types of ovitraps for outdoor monitoring of Aedes mosquitoes in Kuala Lumpur
Ahmad-Azri, M. ; Syamsa, R.A. ; Ahmad-Firdaus, M.S. ; Aishah-Hani, A.
Tropical Biomedicine 2019;36(2):335-347
Dengue is a significant public health problem in Malaysia and vector surveillance
is one of the important components in a vector control program. Routinely vector
surveillance in Malaysia is performed through larval surveys. However, larval surveys
have several limitations. Thus ovitraps are used as an alternative method for monitoring
dengue vectors. The aim of this study was to determine the effectiveness of Standard
Ovitrap (SO), Mosquito larvae Trapping Device (MLTD), Double Sticky Ovitrap (DST) and
NPK Fertiliser Trap to monitor the abundance of Aedes mosquitoes. Each ovitrap was
placed at four different sampling points and rotated to the next position every one week.
Larvae and adult mosquitoes were collected and identified in the laboratory. All four
trapping methods successfully collected larvae of Aedes mosquitoes. The mean number of
larvae per ovitrap in DST was significantly higher (p < 0.05) compared to SO and MLTD.
DST and NPK Fertiliser Trap were capable of capturing adult mosquitoes. Ovitrap Index
and the mean number of adults per ovitrap in NPK Fertiliser trap were significantly higher
(p < 0.05) as compared to DST. Another set of experiments were conducted to compare
NPK Fertiliser traps containing fresh NPK fertiliser solution with those containing stock
NPK Fertiliser solution. The fresh solution was prepared fresh while the stock solution was
stored for a month before being used in the field. Result shows no significant differences
(p > 0.05) between these solutions. Findings from this study conclude that DST is the most
effective ovitrap to monitor Aedes larvae, while NPK Fertiliser trap is the most effective
ovitrap to trap Aedes adult mosquitoes in the study area.