Many, but not all, textbooks written for undergraduate weed science courses lack an ecological-management perspective on the rapidly developing science of weeds and their control. This book does not ignore the history of weed science and the development of chemical weed control, but it strives to include herbicides as one management technique among many rather than the primary method of choice to solve most weed problems.Science, of all kinds, is not in favor these days. Scientists, including weed scientists, eagerly accepted the credit when in 1945, after World War II, many advances in societal development were widely regarded as contributions of science. The public regarded these advances, which included herbicides and other pesticides, as desirable and benign. Now science is held responsible for many problems that have grown out of its linkage with technology. Herbicides are no longer regarded as benign but rather as threats to humans and the environment and are seen by many as undesirable scientifi c creations. The public’s attitude toward science and scientists has become a mingling of awe