Bad science dies hard
They hardly ever make the news, but it's not that uncommon for studies published in peer-reviewed scientific journals to be retracted for reasons of error, misconduct or because other scientists could not duplicate the results.
As reported in "Bad Science Never Dies" by Howard Feinbergh, a contributor to techcentralstation.com, the Journal of the American Medical Association recently published a study that examined 235 peer-reviewed research papers that had been formally retracted. The authors found that the retracted studies were cited by other researchers 2,034 times after they had been retracted. The vast majority of the citations made no reference to the retraction, treating the study as still valid.
Perhaps the most notable example relating to the Green Industry is the now discredited Tulane study purporting a link between certain pesticide combinations and endocrine disruption.