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To determine phytochemistry and larvicidal activity of Eucalyptus camaldulensis against Anopheles stephensi.

The chemical compositions of the leaf essential oils were analyzed using gas chromatography/mass spectrometry (GC/MS). The larvicidal activity of essential oils and extract of leaf were tested against 4th instar larvae of laboratory-reared Anopheles stephensi.

GC/MS analyses identified the presence of 28 compounds corresponding to 99.60% of the total oil. The main constituents in the leaf essential oil were 1,8-cineole (69.46%), γ –Terpinene (15.10%), α –Pinene (5.47%) and Globulol (2%). The leaf extract and volatile oil exerted significant larvicidal activity with LC₅₀ values of 89.85 and 397.75 ppm, respectively. Clear dose-response relationships were established with the highest dose of 320 ppm essential oil extract resulted almost 100% mortality in the population …