蚊蟲翅音的定性與防治應用 Characteristics and control applications of mosquitoes’ wing sound
To increase the specificity of sound for mosquitoes trapping in an isolated environment, a noise-reducing recording chamber was designed and developed. Spectrum of sound was analyzed by using the software of Audacity and Room EQ Wizard. The results revealed that the chamber successfully absorbed 95.7% of ambient sound energy. Statistical analysis showed a significant positive correlation between length of haltere and frequency of wingbeat in male Aedes albopictus, and positive correlation between the length of haltere and the length of wing in females. Wingbeat frequencies were species-specific in Ae. albopictus and Aedes aegypti. Conspecific males and females were attracted to each other’s wingbeat sounds, and post-mating females were attracted to the wingbeat sounds of mated conspecific females. The attraction rate of wingbeat sound from post-mated female Ae. aegypti was significantly increased, and the average oviposition rate in conspecific females was 85.8%. A home-designed mosquito trap employing synthesized wingbeat sounds achieved an average capture rate of 66.7%, but the commercially available UV-light-based mosquito traps is 49.7%. The home-designed mosquito trap based on wingbeat sounds is a promising tool with environmentally and eco-friendly approach to manage Ae. albopictus and Ae. aegypti.