Vol. 7, Issue 4, Part B (2021)

Abstract
The present research project deals on the elimination of mosquito larvae by using synergistic effect of copepods and sodium chloride on various instar larvae of Aaegypti. Mosquitoes are causing various diseases to human and many other organisms in world wide. Mosquito borne disease causes 3.5 billion deaths annually. People of underdeveloped countries have more risk of dengue and malaria. Dengue is a one of the major challenge of 21st century to eliminate it from the breeding sites to low the risk of dengue in population. The control of mosquito population by using pesticides and insecticides make them resistant. Biological control method is a natural way of eliminating harmful insect and pest from environment by using different predators. Biological control is using as alternative source of control mosquito which are becoming resistant to various chemicals agent. Copepods are small crustaceans which were used to control early stage of adult mosquito from water sources. Predation effect of copepods was tested for first, second, third and fourth instar of larvae with different intervals of time. The highest mortality rate after treatment of copepods was 66.66% on first and second instar larvae. The highest mortality rate after treatment of sodium chloride was 73.33% and highest mortality rate with synergistic test was 75.66%.