Insecticidal activity and restoration of piriproxifen action by monoterpenes on Aedes aegypti (Diptera: Culicidae)

The aim was to evaluate the insecticidal action and restoration of piriproxifen (PP) activity through the monoterpenes carveol and β-citronellol on Aedes aegypti. Eggs were placed to incubate in trays with distilled water and fish food to obtain larvae at the third instar (L3). Monoterpenes were used individually in four repetitions at doses of 6.2; 12.5; 25 and 50 µL. For activity restoration, three doses of 5.0; 6.2 and 8.0 µL were used, as well as PP dissolved in distilled water. Ae. aegypti larvae were evaluated at 24, 48, and 72 h after exposure. It was found that both carveol and β-citronellol showed insecticidal activities against Ae. aegypti. Regarding modulation, the two monoterpenes potentiated the activity of PP. In this sense, studies are needed to elucidate the molecular targets of these bioactive molecules, as well as to explore them in synergy with other compounds.