Haemaphysalis longicornis is a major vector for Severe fever with thrombocytopenia syndrome (SFTS) throughout Republic of Korea (ROK). The ticks distribute at vast open fields and various kind of habitate. Control of the ticks with pesticides is almost impossible and personal protection such as use of commercial repellents is very critical for control. However occasional toxic effects of the commercial repellents have been reported that include central nervous system depression and urticaria. In our studies, repellency of three plant essential oils was assessed and was compared with two commercial repellents. Lavendual angustifolia demonstrated the highest repellency and higher repellency than DEET when was individually tested, but binary mixture of Cinnamomum zeylinicam and Juniperus verginiana showed significantly higher repellency with synergic effects than mixture of Lavendula angustifolia and Juniperus verginiana. Further study on repellency of the C. zelinicam in field need.

• Jin Hwan Jeon(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)
• Gi-Hun Kim(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)
• Chang won Jang(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)
• Se Jin Jeong(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)
• E-Hyun Shin(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)
• Young-Ran Ju(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)
• Kyu-Sik Chang(Division of Medical Entomology, Center for Immunology and Pathology, NRIH, KCDC)