chemical composition and repellent activity of achillea vermiculata and satureja hortensis against anopheles stephensi

background : one of the best ways to control the malaria disease and to be protected human against anopheles mos­quito biting is the use of repellents. throughout repellents, herbal ones may be an appropriate and safe source for protection. methods : chemical constituents of achillea vermiculata and satoreja hortensis were determined by using gas chromatography-mass spectrometry. efficacy and the protection time of these plants were assessed on anopheles stephensi under the laboratory condition. results : the mean assessed protection time and efficacy for a. vermiculata was 2.16 and 3.16 hours respectively and the obtained ed 50 and ed 90 for this plant was 5.67 and 63 µl/cm 2 respectively. the figured for s. hortensis was 4.16 and 5 hours respectively.  ed50 and ed90 for this plant were 5.63 and 45.75µl/cm 2 respectively. conclusion : results of investigation showed that s. hortensis plant has an acceptable protection time, therefore, this plant could be considered as a good herbal repellent against anopheles mosquitoes.