You don't need citronella candles or poisonous sprays to keep nasty mosquitoes away from you. The simple solution to repelling these bugs is an electric fan.
Photo by Kenneth Lu
According to the American Mosquito Control Association (yes, it actually exists!), a large fan on your deck will work because mosquitoes are weak fliers.
The New York Times also reports that a fan's breeze "disperses the human emanations that allow female mosquitos [the gender that bites us] to zero in on us". Entomologists from Michigan State University found that fan-generated wind greatly reduce mosquitoes and they recommend we use it in our backyards to protect ourselves and our pets.
A Low-Tech Mosquito Deterrent [The New York Times]