Bio efficacy of Cinnamaldehyde from <em>Cinnamomum verum</em> essential oil against <em>Culex quinquefasciatus</em> (Diptera: Culicidae)

This research aims to study the efficacy of Cinnamomum verum (Cv) extracts for ovicidal, larvicidal, and repellent activities against Culex quinquefasciatus mosquito vectors. The active components C. or cinnamon oil by Gas Chromatography (GC) analysis showed highest cinnamaldehyde at 83.53%. For ovicidal assay, essential concentrations 12.5, 25 50 ppm 72 h had 100% egg hatch inhibition a significant difference when compared control group (p<0.05). Larvicidal activity that were highly effective in killing larvae. Morphological changes raft faded color eggs seemed have split from their while larvae changed pale white wrinkled body with destroyed inner tube motionless. A Scanning electron microscope eggshell micropyle chitin peeled out. After treatment oil, appeared body, thorax abdominal cuticle also high density particles observed on mouth brushes obstructing spiracle. assay could repel both male female mosquitos up 180 min. From results, it was concluded repellency adults insecticidal stages evidenced LC50 6.59±0.54, 9.07±0.67 36.91±7.56 its morphological indicated how not survive after hence this may be useful alternative method is green friendly controlling mosquitoes endemic areas.