I planted a "mosquito control" herb garden with some Citronella, Lemongrass, Clove, Peppermint, Eucalyptus, and Lavender around my patio and it does a pretty good job of keeping them away. I also have a big oscillating fan that I use if I'm hanging outside in the evening. Between those 2 things, I rarely need to put on bug spray unless I venture off into the yard.