97 - Pilot study with ReMoaTM, a new mosquito adulticide, dispersed by thermal fogging against susceptible and pyrethroid resistant Aedes aegypti populations

Abstract: Pilot study with ReMoaTM, a new mosquito adulticide, dispersed by thermal fogging against susceptible and pyrethroid resistant Aedes aegypti populations

Seleena Benjamina, Teoh Guat Neya and Nazni Wasi Ahmadb
a Valent BioSciences LLC
b Senior Medical Entomologist, Institute for Medical Research, Malaysia

Mosquito adulticide (to be branded as ReMoaTM in Malaysia), a first mosquito adulticide product for Valent BioSciences LLC (VBC), was tested using thermal fogging application against Aedes aegypti at the Institute for Medical Research (IMR), Malaysia. The delivery characteristics and the least dosage per hectare that achieves more than 95% mortality was determined for laboratory bred Ae aegypti susceptible (s) and pyrethroid resistant (PY) strains. The study was based on the guidelines as provided by WHOPES 1,2. The two test doses were based on the active ingredient Fenpropathrin in ReMoa, 1.76 gram and 2.68 gram per hectare, at 1:50 dilution with the diluent provided by VBC. The 2.68 gram per hectare achieved a near 100% mortality in the test populations, including the PY strain, within 1 hour of exposure, for all test distances at 5m, 10m and 15m. The 1.76 gram per hectare had 100% mortality in the S and PY mosquito populations, within 1 hour of exposure at 5m test distance. An 83% mortality was achieved at 24h exposure for the S and PY strains placed at 10m from the spray line. It was also observed that the ReMoa fog cloud suspended in the test site far longer than the ‘diesel’ based cloud of other adulticides.

1 Space spray application of insecticides for vector and public health pest control. A practitioner’s guide. WHO/CDS/WHOPES/GCDPP/2003.5
2Guidelines for Efficacy Testing of Insecticides for Indoor and Outdoor Ground - Applied Space Spray Applications WHO/HTM/NTD/WHOPES/2009.2