Disease-Carrying Mosquitoes Can Tolerate DEET Repellant

DEET is the mother of all mosquito repellants. Its strong stench keeps bugs at bay by affronting their olfactory systems with an intensely offensive odor. But scientists are now running into a problem with DEET’s effectiveness: after three hours the stuff no longer deters buzzing biters. N,N-Diethyl-3-methylbenzamide, a.k.a. DEET, first emerged as a pesticide for [...]