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Poster Session

Adult Control

Poster Session

P-2 - An evaluation of available formulated residual insecticides with cone bioassays in Aedes aegypti from Ponce, Puerto Rico

Wednesday, March 5, 2025
12:15 PM – 1:45 PM AST
Location: Hall A
Abstract: Dengue is becoming a public health concern in the Americas, with over 11 million cases confirmed this year. Puerto Rico is currently facing an epidemic with 3,650 confirmed cases, which highlights the urgent need for effective strategies to control Aedes aegypti. The resistance to front-of-the-line insecticides poses a threat to our ability to control Aedes aegypti in Puerto Rico. While residual insecticides have been used in much of Latin America, their efficacy has not been evaluated in Puerto Rico. This study aims to evaluate formulated residual insecticides (Suspend SC, Suspend Polyzone, Fendona, and Demand) on three different surfaces (smoothed/treated cinder clocks, untreated cinder blocks, and glazed ceramic tiles) using cone bioassays in mosquitoes derived from a field strain collected in Ponce, Puerto Rico. Preliminary results indicate resistance to all the products evaluated. Mosquito mortalities were less than 50% within the first 60 minutes of exposure and less than 20% after 24 hours of exposure. These findings suggest that these products have limited effectiveness in controlling Aedes aegypti in Ponce and emphasize the need for new insecticides with different modes of action.