National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Mosquitoes are important vectors of several infectious diseases, creating a need for effective plant-based approaches for personal protection. The present study evaluated the phyto-chemical characteristics and mosquito-repellent potential of aqueous leaf extracts of Ocimumtenuiflorum and Coleus amboinicus, individually and in combination. Fresh leaves were extracted with distilled water at a 1:10 (w/v) ratio and subjected to qualitative phytochemical screening. Tulasi extract showed positive reactions for tannins and saponins, whereas Karpooravalli extract showed terpenoids, glycosides and flavonoids. The extracts were incorporated into a vaseline base and evaluated using a screened-cage assay with 20 adult mosquitoes for 2 h. Tulasi treatment resulted in 5 deaths, while Karpooravalli resulted in 8 deaths. The 1:1 combination produced 10 deaths and was associated with pronounced avoidance and reduced landing behaviour. The formulated preparation showed a smooth and uniform appearance without visible phase separation during the observation period. The findings indicate that O. tenuiflorum and C. amboinicus extracts possess observable mosquito-deterrent activity and that their combined formulation warrants further investigation using standardized quantitative repellency assays, replicated experiments and safety evaluation.
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