Some 80 million pounds of the herbicide atrazine are applied annually in the United States on corn and sorghum to control weeds and increase crop yield, but such widespread use also makes atrazine the most common pesticide contaminant of ground and surface water, according to various studies.

More and more research, however, is showing that atrazine interferes with endocrine hormones, such as estrogen and testosterone — in fish, amphibians, birds, reptiles, laboratory rodents and even human cell lines at levels of parts per billion.

Recent studies also found a possible link between human birth defects and low birth weight and atrazine exposure in the womb.

ScienceDaily