Assessment of combined tools and strategies for Aedes aegypti control with low environmental impact
The control of the mosquito vector Aedes aegypti L. (Diptera: Culicidae) is the main action against dengue, chikungunya, and Zika. The excessive use of conventional insecticides has promoted the development of other control methods and strategies with lower environmental impact. We evaluated the effectiveness of applying triflumuron 1 ppm and emptying water-filled containers in a field trial in temperate Argentina. Both control methods were implemented either individually or combined and regularly from the beginning of the mosquito reproductive season or once it reached peak abundance. The impact on a non-target midge of the genus Chironomus was also tested. The highest reductions of Ae. aegypti were achieved in treatments which included triflumuron. This effect was stronger when applied from the beginning of the reproductive season, with < 1.3% of positive containers throughout the entire season. No enhancing effects were obtained when combining both control methods. Treatments with triflumuron were not completely innocuous for the non-target species, with Chironomus sp. more susceptible to treatments including triflumuron applied from the beginning of the reproductive season than all others. Sharp reductions of mosquito populations in urban environments with high density of water-filled containers are possible with minimum container management efforts, by applying triflumuron 1 ppm every 6 weeks. In temperate urban settings, better results can be obtained when applications begin early in the reproductive season of the mosquito vector Aedes aegypti.
KeywordsDengue Mosquito control Triflumuron Container management Non-target species Chironomus
The authors would like to thank the authorities of the cemeteries for allowing us to work inside their boundaries.
This work was financially supported by the Agencia Nacional de Promoción Científica y Tecnológica (PICT 2014-3217) and the Consejo Nacional de Investigaciones Científicas y Técnicas (PIP 112-201301-00038).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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