Atrazine is one of the most widely used herbicides in North America and has been a mainstay ingredient in weed control, with more than 300 products that contain the herbicide. An ongoing biological evaluation of atrazine by the U.S. Environmental Protection Agency could limit the product’s 63-year run and bring a $2 billion negative impact to corn, sorghum and sugarcane growers. EPA is accepting public comment through Feb. 19 on a draft Endangered Species Act biological evaluation relative to the potential effects of atrazine on threatened or endangered (listed) species and their designated critical habitats. Atrazine is a chlorotriazine herbicide registered in the U.S. to control annual broadleaf and grass weeds. During the most recent five years of available survey data (2013-2017), an annual average of 72 million pounds of atrazine were applied to an average of 75 million acres of agricultural crops. The majority of atrazine is applied to corn both in terms of pounds a.i. applied (87% of total; 62 million pounds applied annually) and acres treated (88%). Sorghum and sugarcane make up the majority of the remaining annual usage. Annual use on sorghum is approximately 6.4 million pounds and sugarcane is 1.7 million pounds.