Main interest in the department is analysis of environmental factors that affect the trasmission of insect‐borne diseases, and pursuing better vector control strategy that is harmonious to the environment.
１．Physiology and ecology of malaria vectors
　　A long‐term monitoring on main vectors of malaria has been conducted at several fields in Southeast Asian countries. Spatial and temporal changes in larval habitats, vegetation, and the impact of human activity on the environment are evaluated in relation to abundance of vectors, host preference, and other population parameters. The GIS/RS is introduced as a new tool to analyze the environment. Geographical strains of several Anopheles are comparatively studied by morphological, physiological, and genetic approach.
２．Ecology and control of dengue vectors
　　Epidemiological studies have been conducted at several fields in Southeast Asian countries. Monitoring by oviposition traps and mark‐release‐recapture experiment are performed to establish more realistic larval indices. In the laboratory Aedes aegypti and Ae. albopictus are studied on their ecological characters among gegraphical strains. Feeding behavior and population dynamics of these mosquitoes also are studied in the laboratory and fields.
３．Vector control technique related studies
　　Basic study of copepods as hopeful biological control agent against vector mosquito larvae. Biochemical approach to insecticide registance in vector mosquitoes.