Aedes albopicuts, known as asian tiger mosquito or forest mosquito, is characterized by its black and white strips on legs and body. Ae. albopictus is an important vector mosquito for the transmission of many viral pathogens such as dengue fever and chikungunya fever. Unlike other mosquito, Ae. albopictus attacks people mainly during the daytime in the forest. To evaluate the diel activity of Ae. albopictus, three times mosquito collecting were conducted using BG Sentinel trap with dry ice in bamboo forest in Damyang-gun, Jeoullanam-do, in South Korea from August to September, 2009. Captured mosquitoes were counted and released every one hour during 25 hours experiment time. The result showed that Ae. albopictus activity began with sun rising at approximately 09:00, with peak in the early evening between 16:00 to 19:00, and ended with sunset at 21:00. Among the several factors affecting on the mosquito activity, light intensity seems to be a main factor. Especially, if the light intensity is over some threshold, it negatively effects on the activity of Ae. albopictus.

• Hyunwoo Kim(Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health)
• Wook-Gyo Lee(Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health)
• Kyu Sik Chang(Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health)
• Jong Yul Roh(Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health)
• E-Hyun Shin(Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health)