The countdown to a final decision by the U.S. Environmental Protection Agency (EPA) is underway that could impact the future use and efficacy of atrazine on corn, grain sorghum and sugarcane acres. The 60-plus year-old product is used on more than 70% of U.S. corn acres to control grass and broadleaf weeds.
 
EPA is weighing whether to implement its recent decision, announced June 30, to change the current level of concern (LOC) standard for atrazine from 15 parts per billion (ppb) to an LOC of 3.4 parts per billion.
 
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