effect of d-allethrin aerosol and coil to the mortality of mosquitoes

Background: commercial insecticides were widely used by communities to control the mosquito population in their houses. d-allethrin is one of insecticide ingredients widely distributed in two different concentrations namely 0.15% of aerosol and 0.3% of coil formulations. we aimed to understand the mortality of indoor mosquitoes after being exposed to d-allethrin 0.15% (aerosol) and 0.3% (coil) formulations. methods: this quasi-experiment study applied the posttest-only comparison group design. the aerosol and coil d-al-lethrin were used to expose the wild mosquitoes in twelve dormitory bedrooms of smkn jawa tengah, a vocational high school belonging to central java provincial government, on march 2017. the compounds were exposed for 60 min to each bedroom with four-week interval for both of formulations. the knockdown mosquitoes were collected into a plastic cup and delivered to the laboratory for 24h holding, morphologically species identification and mortality re-cording. history of insecticide use in the dormitory was recorded by an interview with one student in each bedroom. data were statistically analyzed with independent sample t-test and mann-whitney. results: as many as 57 knockdown mosquitoes belonging to three species were obtained namely culex fuscocephala, cx. quinquefasciatus and aedes aegypti with mortality rate of 50.88% after 24h holding. knockdown and mortality of mosquitoes were significantly different based on d-allethrin formulations. d-allethrin concentrations were not effective for controlling culex mosquitoes but effective for ae. aegypti. conclusion: further efficacy of d-allethrin 0.15% aerosol to eradicate ae. aegypti is necessary to be conducted in sup-porting the dengue vector control.