Mosquitoes play a significant role in the transmission of diseases to humans, most notably culex mosquitoes that transmit diseases such as filer worms, Rift virus, Neil virus . Mosquito control is difficult because of the advent of resistance to many insecticides. Traditional artificial insecticides are fast and effective pest control methods. But due to their adverse effects on the environment and non-target organisms, there is a growing need to find new and safe alternatives to pest control. Herbal extracts have the greatest hope because they are non-polluting, degrading and less harmful to the environment. Essential oils extracted from some plants have good fecal and intrusive properties that can be a potential alternative to chemical pesticides. Herbal Essential oil have a wide range of secondary metabolites that do not play a role in biochemical processes of the plant, but in plant ecological relationships, especially plant and insect interactions. Essential oil are a group of high-tech chemical compounds that are considered to be seriously human due to their low risk and anti-insect properties such as insecticide, insect repellency, nutritional inhibition and spawning. These compounds also affect most biological parameters, including growth rate, longevity and reproduction of insect. This study investigates the effect of larvae of Rosemary and Peppermint essential oils on larvae of Culex mosquitoes. In order to carry out this study, the Qara-Karez River, which crosses the Khondab city, late in spring and early summer, the ponds that have been created, some lobes of the mosquito colaks are collected and transferred to the lab. In the laboratory, we prepare each concentrate for each essential oil, and then add 10 lobes to it. In 5 minutes, we transfer the larvae to the substrate environment.
