Curcumin/d‐mannitol as photolarvicide: induced delay in larval development time, changes in sex ratio and reduced longevity of <scp><i>Aedes aegypti</i></scp>

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<jats:title>Abstract</jats:title><jats:sec><jats:title>BACKGROUND</jats:title><jats:p>Resistant populations of <jats:italic>Ae. aegypti</jats:italic> have been a major problem in arboviruses epidemic areas, generating a strong demand for novel methods of vector control. In this regard, our group has demonstrated the use of curcumin as an efficient photoactive larvicide to eliminate <jats:italic>Ae. aegypti</jats:italic> larvae. This work was aimed to evaluate the <jats:italic>Ae. aegypti</jats:italic> (Rockefeller) development under sublethal conditions, using a curcumin/d‐mannitol (DMC) formulation. The photolarvicidal efficacy under semi‐field and field conditions (wild populations) was also analyzed, as well as the photobleaching and residual activity of DMC.</jats:p></jats:sec><jats:sec><jats:title>RESULTS</jats:title><jats:p>A delay in development time when larvae were exposed to sublethal concentrations of DMC was observed, followed by significant changes in sex ratio and reduction in longevity. DMC also presented a low residual activity when compared to usual larvicides, and had a substantial photolarvicidal activity against wild populations in field trials, achieving 71.3% mortality after 48 h.</jats:p></jats:sec><jats:sec><jats:title>CONCLUSIONS</jats:title><jats:p>Overall, these findings are of great biological importance for the process of enabling the implementation of DMC as a new product in the control of <jats:italic>Ae. aegypti</jats:italic> larvae, and contributes to the improvement of new plant‐based larvicides. © 2021 Society of Chemical Industry</jats:p></jats:sec>

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