The U.S. Environmental Protection Agency established tolerances for residues of glufosinate ammonium in or on multiple commodities.
Among others, the tolerance of glufosinate ammonium is set at 0.30 ppm in fruit, stone, (crop group 12-12) and at 0.50 ppm in nut, trees (crop group 14-12).
The Regulation is effective since May 15, 2019; objections and requests must be received on or before July 15, 2019.