Some products ward off mosquitoes and some don't work at all. Here's what their experience and research have found:

Citronella candles can help rid an area of mosquitoes, but they won't totally prevent bites and can become ineffective in windy conditions.

Repellent coils and sprays like citronella candles, can help but a stiff breeze will render them ineffective. 'Doughnuts' work well at killing mosquito larvae in small water-garden ponds, birdbaths, rain barrels and other places where you may want to keep standing water.

Electronic/ultrasonic repellents, sold as wristbands or clip-on devices, claim to work by emitting the sound of dragonflies, a natural predator of mosquitoes, but the mosquitoes aren't fooled.

Bug zappers, a staple at campgrounds, zappers attract bugs using black lights and then electrocutes them. While they do kill bugs, they won't put a dent in a typical mosquito population, and they kill more moths and beetles than anything else.

Mosquito Magnet, the most high-tech weapon uses propane to emit carbon dioxide, just as people do, which is one of the things that helps mosquitoes find you. Once mosquitoes are lured to the device, they are sucked into a trap where they dehydrate and die. Effective but expensive.

Skin sprays are still the best protection against
getting bitten if the spray contains DEET.