WaPo "A common household pest for centuries, bedbugs were virtually eradicated in the 1940s and '50s by the widespread use of DDT. That insecticide was banned in the 1970s, and the bugs developed resistance to chemicals that replaced it."
On a similar note: School Named After Al Gore and Rachel 'DDT' Carson Built on Toxic Soil "A new school will be opening in Los Angeles next Monday that is named after Nobel Laureate Al Gore and Rachel Carson, the woman almost single-handedly responsible for DDT being banned in the '70s."