DuPont is the registrant of Imprelis Herbicide (EPA Registration No. 352-793) with the active ingredient aminocyclopyrachlor (CASRN 858956-35-1). Beginning in June 2011, EPA started receiving complaints from state pesticide agencies regarding evergreen damage related to the use of Imprelis. As of August 2011, DuPont has submitted to the Agency over 7,000 adverse incident reports involving damage (including death) to non-target trees – primarily Norway spruce and white pine – related to the application of Imprelis. Test data from DuPont has confirmed certain coniferous trees, including Norway spruce and balsam fir, as susceptible to being damaged or killed by the application of Imprelis. EPA continues to collect information from DuPont, state agency investigations, inspections and data analyses. The Agency continues to investigate possible causes of the evergreen damage.