Relative repellent effectiveness of 3 extracts and 1 oils of Lavandula officinalis, Melissa officinalis, Rosmarinus officinalis, Citrus limonum, Eucalyptus globolus, Ocimum basilicum laboratory mosquitoes of Anopheles stephensi on guinea-pigs in the laboratory. Efficacy of each experimental substance was repeated three times. Highest efficacy were supposed for Lavender oil and lowest efficacy for Ethanol.