Swarms of Mosquitoes on my patio led me to an old home remedy - Did you know that chopped up garlic makes mosquitoes disappear? I buy minced, dried garlic at local Fiesta grocery stores and sprinkle it around on my patio. I have to stand back as I am using it - mosquitoes will literally swarm out of your plants and bushes to get away from the smell. Works like a charm!! Going to try this next year.
How to Make a Garlic Spray to Repel Mosquitoes | eHow