The IR3535-based repellent protected against mosquitobites for an average of 22.9 minutes. The citronella-based repellents we tested protected for 20minutes or less. There was no significant difference inprotection time between the slow-release formulationcontaining 12 percent citronella and the formulation containing 5 percent citronella (P=0.07) or the twoformulations containing 10 percent citronella (P=0.16and P=0.80). The repellent containing only 0.05percent citronella provided less protection than theSkin-So-Soft mineral-oil–based moisturizer (Avon)(P<0.001). Repellent-impregnated wristbands, containingeither 9.5 percent DEET or 25 percent citronella(by weight), protected the wearer for only 12to 18 seconds, on average.
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