Image Number K7243-10

If we decide to donate blood, most of us would like to control when we donate it-and to whom. So mosquitoes are an outdoor nuisance to be avoided, as are biting flies, ticks, and chiggers. We ward all of them off with deet, a strong repellant that ARS discovered 40 years ago.

Photo by Scott Bauer.

640 pixels wide: (k7243-10.jpg)