DEET - Information from US Environmental Protection Agency This page discusses EPA's actions concerning DEET, considered by many to be the most effective mosquito repellent currently available. Page also includes tips on how to use DEET products safely.
Catnip Repels Mosquitoes More Effectively Than DEET ScienceDaily Magazine - Researchers report that nepetalactone, the essential oil in catnip that gives the plant its characteristic odor, is about ten times more effective at repelling mosquitoes than DEET - the compound used in most commercial insect repellents.