ReMoa Tri displays minimal efficacy against adult mosquitoes when used as active ingredient for toxic sugar baits

Abstract

Mosquito control programs face many limitations to their control efforts, with one major hurdle being insecticide resistance. A novel adulticide, ReMoa Tri, offers a counter to this limitation, demonstrating efficacy against insecticide-resistant populations of adult mosquitoes. This triple-action adulticide contains two understudied active ingredients (abamectin and C8910). Toxic sugar baits (TSB’s) have also proven to display efficacy against resistant populations of mosquitoes and provide a novel method of mosquito control. Here, we examine the efficacy of ReMoa Tri when applied as a TSB product. ReMoa Tri was mixed with a 10% sucrose solution and administered to insecticide-susceptible and resistant strains of Aedes aegypti Linn. and Culex quinquefasciatus Say at varying concentration levels. The highest mortality belonged to the resistant strain of Ae. aegypti with 26.19% at a 20% concentration level. While there were many limitations to this study, dissections confirming consumption of the material and statistical significance between the relationship of dose and mortality indicated limited efficacy of the material when applied as a TSB. Despite these findings, the need for further investigation into the efficacy of abamectin and C8910 is essential to expanding the range of materials available to mosquito control efforts.

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