"Consumer Reports" magazine recommendations for mosquito repellent.Heightened interest because of Zika and West Nile viruses. http://www.consumerreports.org/insect-repellents/mosquito-repellents-that-best-protect-against-zika/
Consumer Reports' tests showed that some repellents worked much better than others at protecting against the type of mosquitoes that transmit Zika.
The most effective products against Aedes mosquitoes were Sawyer Picaridin and Natrapel 8 Hour,
which each contain 20 percent picaridin, and Off! Deepwoods VIII, which contains 25 percent deet. They kept the mosquitoes from biting for about 8 hours. (The Sawyer product was our top insect repellent overall. It was the only one that also kept Culex mosquitoes, which can spread West Nile disease, and deer ticks, which can spread Lyme disease, away for at least 8 hours.)The CDC recommends using EPA-registered insect repellents.
To see if a mosquito repellent is registered by the EPA, look for its registration number ("EPA Reg.") on the back of the label.