Many critics repeatedly asserted that she was calling for the elimination of all pesticides. Yet Carson had made it clear she was not advocating the banning or complete withdrawal of helpful pesticides, but was instead encouraging responsible and carefully managed use with an awareness of the chemicals' impact on the entire ecosystem. In fact, she concludes her section on DDT in "Silent Spring" not by urging a total ban, but with advice for spraying as little as possible to limit the development of resistance.