Low energy method was employed,allowing achievement of small droplets. The nanoemulsion also presented low polydispersity and meandroplet below 200 nm, even after 30 days of storage. Potential mortality levels were observed after 24 h(80 ± 10%) and 48 h (90 ± 10%) in A. aegypti larvae at final concentration of 250 ppm, related to R. officinalisessential oil