Seriously now, there are some great mosquito abatement systems commercially available which have freed entire islands of the pests.
They work with sound, smell, and CO2 emitters to attract mosquitos in and fry'em, or whatever, Rich guys who live near swamps use them. In a few weeks they can wipe out a local mossquito population ...somehow. Check it out.
www.scapest.com/mosquito-machines.html - 14k
Fish help too. However, chemicals can kill the dragonflies that eat the mosquitoes. Make sure you have plenty of creatures that eat the moquitoes. BT works as well without harming other creatures.