Investigation of mosquito density

Mosquito density was investigated at Shinjuku Gyoen National Garden as part of an emergency drill for controlling the mosquito vector of dengue fever in preparation for the 2020 Olympic and Paralympic games in Tokyo. e average mosquito density at 57 collection sites was 6.9 individuals/site. Aedes albopictus was predominant and accounted for 76.6% of the total number of mosquitoes collected. In insecticide-treated sites, 18 sites were selectively investigated for mosquito density, and 74 mosquitoes were collected before insecticide treatment. A er insecticide treatment, no mosquitoes were found at any collection site. Basic data, such as mosquito species, distribution, and density, collected by monitoring mosquitoes from 2015 to 2019 at the garden were very useful in designing this investigation.