Effect of glufosinate rate and addition of ammonium sulfate on annual weed control in glyphosate/glufosinate/2,4-D–resistant soybean

Abstract The development of glufosinate-resistant soybean cultivars has created opportunities for use glufosinate applied postemergence weed control. Four field experiments were conducted in 2021 and 2022 to ascertain the effect rate addition ammonium sulfate on annual control glyphosate/glufosinate/2,4-D–resistant soybean. An increased 500 from 300 g ai ha −1 improved common ragweed, lambsquarters, redroot pigweed, foxtail species resulted decreased density dry biomass lambsquarters species. 2 8 wk after application (WAA), species, 2, 4, WAA, but did not improve ragweed pigweed. Increasing dose improves species; however, benefit is species-specific.