We conducted studies involving 15 volunteers
to test the relative efficacy of seven botanical
insect repellents; four products containing N,N-diethylm-toluamide,
now called N,N-diethyl-3-methylbenzamide
(DEET); a repellent containing IR3535 (ethyl
butylacetylaminopropionate); three repellent-impregnated
wristbands; and a moisturizer that is commonly
claimed to have repellent effects. These products were
tested in a controlled laboratory environment in which
the species of the mosquitoes, their age, their degree
of hunger, the humidity, the temperature, and the
light–dark cycle were all kept constant.