Effect of Ammonium Sulfate and Bentazon on Sethoxydim Absorption

The effect of ammonium sulfate on absorption of14C-sethoxydim applied alone and with bentazon was studied in large crabgrass. Adding ammonium sulfate to14C-sethoxydim increased14C absorption 6-fold at 0.5 h after application but did not affect the amount of14C absorbed 1 or 4 h after application. Applying bentazon with14C-sethoxydim reduced14C absorption 26%. When14C-sethoxydim was applied with bentazon and ammonium sulfate,14C absorption and translocation were similar to those with14C-sethoxydim alone.