209 - Evaluating the efficacy of ReMoa Tri against native Aedes taeniorhychus populations in Charlotte County, Florida, USA

Abstract: Preventing the development of resistance in adult mosquito populations by utilizing different active ingredients in rotation against a species is paramount for successful long-term control strategies. With over 32,000 acres of salt marsh mosquito habitat, Aedes taeniorhynchus is a major nuisance species in Charlotte County, Florida, USA. Wild populations of Ae. taeniorhynchus have previously been shown to have substantial resistance to malathion and malathion-based products. To minimize the potential for evolving resistance to permethrins in local wild populations, the addition of products with new chemical formulations and modes of action are crucial for our continuing operations. ReMoa Tri is a novel triple-action insecticide containing three active ingredients, abamectin, fenpropathrin, and C8910. While ReMoa Tri has been evaluated against Culex species, there is a dearth of information regarding its efficacy on salt marsh mosquitoes such as Ae. taeniorhynchus or Ae. sollicitans. Local Ae. taeniorhynchus populations were challenged by ReMoa Tri using a series of cage trials filled with wild-caught Ae. taeniorhynchus. Ground-based applications were performed with an ultra-low volume truck mounted spray system and mosquito mortality was recorded up to 48 hours post-application. Results and implications will be discussed.