Mosquitoes act as a disease-causing vector it outbreaks the disease throughout the world. Mosquito is often observed everywhere because of improper maintenance of the drainage system specifically in rainy seasons, ponds, ditches and rice fields. This environment provides a favorable breeding place for mosquitoes (Komalamisra et al., 2005). Among the worldwide showed mosquitoes, more than a hundred species can transmit several diseases in humans and other vertebrates (Rueda, 2008). Mosquitoes can spread malaria, dengue fever, yellow fever, filariasis, Japanese encephalitis, and chikungunya to humans and creates allergy in humans. Gradually mosquito transforms dengue from one person to another in the way of biting infected persons (Das et al., 2003; Nour et al., 2009).

In lateral years, the application of chemical insecticides to control mosquito vectors and their program has been limited. Because of the demand for new insecticides, cost-effective synthetic insecticides, the sustainability of environment concern, public health and non-target peoples, their non-biodegradable environment, increased rate of biological expansion through organization and insecticide conflict on a global exfoliation (Ghosh et al., 2012).The man-made or synthetic insecticides has been dramatically increased condition to make control of various pest and disease in agricultural areas as well as disease carrying mosquito vector in urban area. In another side, the utilization of these synthetic insecticides has been represented the highest level of the resistance between the mosquitoes (Mahyoub et al., 2016).

This has necessitated the research demand and exploitation of eco-friendly, biodegradable and cheap cost endemic methods for mosquito control, which is employed with minimum handle by individuals and communities from a specific perspective (Kumar et al., 2012). There is provoking concern in research for bioactive compound against various pest from natural origins (Mickymaray S, Alturaiki, 2018; Mickymaray, 2019; Mickymaray and Al Aboody, 2019 Ganesan et al., 2020; Al Aboody and Mickymaray, 2020) as they do not develop any contrary consequences on the non-target organisms and are biodegradable persists a exceed research problem for research related with substitute mosquito control (Redwane et al., 2002).

In previous research eshasde scribed the potential of plant crude extracts, derived compounds and essential oils against larval stages of the mosquito. However, its diligence of botanical extracts in the field is even to be determined (Kannaiyan et al., 2012; Mickymaray et al., 2016). Nevertheless, biological reduction of heavy metals would be profitable for the emergence of impertinent, non-toxic, and eco-friendly nanoparticles; the synthesized silver nanoparticles are naturally hydrophilic, disseminate uniformly in water, stable, and had substantial larvicidal activity (Amer and Mehlhorn, 2006; Abdul Rahuman et al., 2008).

Nanoparticles comprises of more dimensions with the range of 100 nm or below have absorbed great maintenance because of their strange and captivating attributes (Kato 2011). Recent research focused that synthesized that nanoparticles have been highly explored for various properties like anti-cancer, anti-inflammatory, and antimicrobial activity (Johnston et al., 2010). Recently they are several increased number of plant-borne compounds have been researched for their efficiency and extracellular synthesis of nanoparticles, which exhibits the potential activity against mosqitocidal properties in atmospheric condition (Benelli, 2016).

Novel research in application nanoparticles makes great attention of researchers, which is involving the extensive utilization, and development of nanotechnology in various fields like electronics, material sciences, drug development, and disease diagnosis. The exploitation of green synthesis of aqueous crude plant extracts and microorganism are processing the synthesis of nanoparticles is developing in nanotechnology (Roopan et al., 2013). The application of crude plant extract, bacteria, and fungi for the biosynthesis of metal nanoparticles like silver, gold and oxide extends various profits like eco-friendly and characteristic for pharmaceutical and biomedical properties as they do not apply any toxic chemicals in the synthesis of nanoparticles (Aboody, 2019; Yang-Ke et al., 2019; Prabakar et al., 2013)

Many biological systems, such as that of fungi,algae,bacteria, and plants have been studied for the biosynthesis of silver nanoparticles (Balaji et al., 2009; Krishnaraj et al., 2010; Philip, 2010). These synthesized nanoparticles are reported to have several beneficial activities. The larvicidal activity of cobalt nanoparticles synthesized by Bacillus thuringiensis against Anopheles subpictus and Aedesaegypti (Diptera: Culicidae) was studied by Marimuthu et al., (2013).

Nevertheless, plant and plant-derived nanoparticle synthesis can be beneficial compared to other methods to control larvicidal activity. The reaction rate for the synthesis of nanoparticles is very high, eco-friendly and not harmful to Non-target organisms. (Naik et al., 2014).Economically the exhaust of the fresh inflorescence of C. urensis useful to prepare various fermented products (Namoff et al., 2011). It also renders potent fibre, woody stems for building fabrics and starch has been extracted from the coconut pith. In Asian countries, stem starch of C. urens plays a role as a major food source between tribal peoples (Ranasinghe et al., 2012). Therefore, the present work was carried out in search of new microbial and mosquito control agents. With the information gained from the previous reports, silver nanoparticles were synthesized from the plant species Caryota urens and antimicrobial activities AgNPs against soil pathogens and their larvicidal activity against mosquito larva were studied.