CHANGES IN MOSQUITOES POPULATIONS AT SOME SITES IN HANOI, 2020-2021

Tóm tắt

In recent years, the application of technology in science has raised concerns
among scientists. This report summarized the evaluation of the effectiveness of
mosquito collection by the digital mosquito monitoring system (DMS) using CO2 gas,
which could be a potential tool for mosquito collection in the future. The study was
carried out in 2 phases: Phase 1 from September to October 2020; phase 2 from April
2021 to July 2021 in 2 districts in Hanoi city, Vietnam. Numbers of mosquitoes were
collected from 2 digital mosquito monitoring systems (DMS). The data of mosquitoes
collected from each machine is updated continuously for 24 hours on the system.
The number of mosquitoes collected in April was the highest in both locations and
from 9.00 - 10.00 am of the day. The actual results obtained in the two traps were
significantly different: The automatically updated insects were 37 630 individuals, and
the collected insects were 48 079 individuals. The majorities of collected insects were
Culex (91.76%) with 23 745; followed by Aedes albopictus (2.49%) with 1 096
individuals; Aedes aegypti (1.63%) with 422 individuals and other species (2.37%)
with 614 individuals such as fruit flies and drain flies belong to Tipulidae and Pieridae
family. The automatically updated data of 2 machines showed that mosquitoes had
been collected at all time frames of the day, followed by the number of collected
mosquitoes at 9-10 am (11.87%), the lowest number was recorded at 7-8 a.m. (1.14%).