Mosquito populations may persist despite current decreases, according to specialist predictions
The summer of 2023 in South Korea saw an unusually low mosquito activity, with the mosquito index, operated by Seoul's municipal government, remaining below last year's peak [1]. This trend continued into October 2024, when the number of mosquitoes collected in Seoul's digital mosquito monitoring system was about 80% of that in September [2].
The delayed resurgence of mosquitoes in autumn is influenced by extended mosquito activity into late fall, likely due to climatic factors such as warmer temperatures lasting longer than usual [2]. The highest mosquito activity recorded this year was on June 28, at a relatively mild 77.2 [1]. However, similar patterns of high mosquito activity in September and October were observed in 2024 [2].
Despite the current low activity, experts warn that mosquito activity might increase in early autumn. Mosquitoes are most active between 15 and 30 degrees [3]. As the seasons turn, South Koreans may yet face a delayed visit from summer's most persistent pest.
Mosquitoes thrive in mild, humid weather, around 25 degrees [3]. Heavy rain bursts, although they might have occurred, have further destabilized mosquito habitats. However, the absence of mosquitoes is attributed to an unusually early and prolonged heat wave, which has led to the drying up of stagnant water, essential for mosquito breeding [1].
Preventive measures recommended by local authorities in Seoul include public education to eliminate standing water around residences to reduce breeding sites, use of insect repellents and insecticides, wearing long-sleeved clothing especially during dawn and dusk when mosquitoes are most active, and continued monitoring of mosquito populations and timely public health advisories [2][5].
Considering the global concern over mosquito-borne diseases like chikungunya, carried by Aedes species present in the region, sustained efforts in mosquito control are essential to prevent disease outbreaks [1]. As the autumn months approach, it is crucial for residents to remain vigilant and continue taking preventive steps against mosquitoes.
- The delayed mosquito activity in autumn may be related to environmental-science factors such as the prolonged heat wave, which could impact climate-change patterns and global health-and-wellness issues, particularly mosquito-borne diseases like chikungunya.
- As the weather cools down, the science community remains concerned about the potential resurgence of mosquito activity in South Korea due to the continued availability of mild, humid weather suitable for mosquito breeding, emphasizing the importance of preventive measures for health-and-wellness and environmental-science preservation.
