Evaluation of a “fogging” canister for indoor elimination of adult Aedes aegypti.
AbstractAedes aegypti is the primary vector for dengue transmission in Singapore. In response to dengue transmission, ultra-low volume (ULV) spraying of insecticides in apartments in transmission areas is used to supplement source-reduction effort. This study seeks to determine the efficacy of Mozzie Zap, a “fogger” in an aerosol canister, which contains 1.7% cypermethrin and 3.4% piperonyl butoxide (PBO, a pesticide synergist). The product, which has the unique continual release mechanism, was tested using two canisters in a two-bedroom apartment block. Caged female adult mosquitoes and magnesium oxide slides were positioned prior to the release of the chemicals. All bioassays and slides were exposed for 30 minutes before removal. Subsequent residual activity tests were carried out using WHO contact bioassay cones on horizontal (floor) and vertical (wall) surfaces. Mozzie Zap’s fog produced fog of effective droplet size (average VMD=24.32 μm), and achieved 100% mortality against Ae. aegypti. However, no residual activity on wall surfaces (3.1% on Day 2) was observed.
Cheng, Pang Sook, Yoong, Foo Siew, Baha, Png Ah, Lu, Deng, Gek, Lam-Phua Sai. et al. (2009). Evaluation of a “fogging” canister for indoor elimination of adult Aedes aegypti.. WHO Regional Office for South-East Asia.. http://www.who.int/iris/handle/10665/170960