The Repellent Efficiency of a Mosquito Coil with Emphasis on Coverage Area in Laboratory Conditions

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Narumon Komalamisra
Sampas Nicharat
Somjai Leemingsawat
Supatra Thongrungkiat
Raweewan Srisawat



The efficiency of a mosquito coil formulation containing d-allethrin 0.3% w/w was examined in order to find the protective coverage area from Aedes aegypti in closed room conditions. Eight volunteers sat at positions 1 m, 2 m, 4 m and 7 m away from the coil. When the mosquito coil was ignited, the mosquito-landing number was counted and recorded at 2, 4, 6, 8, 10, 15, 20, 25, 30, 45 and 60 min. It revealed that the percentage reduction in mosquitoes landing at every distance increased corresponding to the increase in burning time. At 10 min, more than 60% mosquito landing reduction was found at 1 m and 2 m from the coil, while the same percentage reduction for 4 m and 7 m was observed at 15 min. When the coil had been alight for 60 min, 98% landing reduction could be achieved at every radial distance of the experiment.

Keywords : mosquito coil, protective coverage area

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