Pennsylvania Smartweed Confirmed ALS-Inhibitor-Resistant in Arkansas Tommy Butts, Jason Norsworthy, and Tom Barber Smartweed species have been reported as important weeds to manage in Midsouth rice acres. Recent suspicions and reports of suspected ALS-inhibitor-resistant smartweed have begun to emerge in Arkansas. As a result, the objective of this research was to perform a dose response experiment on a suspected ALS-inhibitor-resistant (Jackson County, AR) and susceptible (Lonoke County, AR) Pennsylvania smartweed population. 7 28 2021 Wednesday, July 28, 2021 19:49:28 PM PDT Rice,Field Crops,Weed Management,Herbicides Dose response of suspected ALS-inhibitor resistant smartweed from Jackson County, AR 28 days after treatment of bispyribac-sodium (Regiment) and halosulfuron + prosulfuron (Gambit). afranke@uada.edu