(a) General. Tolerances are established for residues of the herbicide glufosinate ammonium, including its metabolites and degradates, in or on the commodities in the table below. Compliance with the tolerance levels specified below is to be determined by measuring the sum of glufosinate ammonium, butanoic acid, 2-amino-4-(hydroxymethylphosphinyl) monoammonium salt, and its metabolites, 2-(acetylamino)-4-(hydroxymethyl phosphinyl)butanoic acid, and 3-(hydroxymethylphosphinyl)propanoic acid, expressed as 2-amino-4-(hydroxymethylphosphinyl)butanoic acid equivalents:
| Commodity | Parts per million |
|---|---|
| Almond, hulls | 0.50 |
| Apple | 0.05 |
| Banana | 0.30 |
| Banana, pulp | 0.20 |
| Beet, sugar, molasses | 5.0 |
| Beet, sugar, roots | 0.9 |
| Beet, sugar, tops (leaves) | 1.5 |
| Bushberry subgroup 13B | 0.15 |
| Canola, meal | 1.1 |
| Canola, seed | 0.40 |
| Cattle, fat | 0.40 |
| Cattle, meat | 0.15 |
| Cattle, meat byproducts | 6.0 |
| Corn, field forage | 4.0 |
| Corn, field, grain | 0.20 |
| Corn, field, stover | 6.0 |
| Corn, sweet, forage | 1.5 |
| Corn, sweet, kernels plus cob with husks removed | 0.30 |
| Corn, sweet, stover | 6.0 |
| Cotton, gin byproducts | 15 |
| Cotton, undelinted seed | 4.0 |
| Egg | 0.15 |
| Fruit, citrus, group 10-10 | 0.15 |
| Fruit, pome, group 11-10 | 0.25 |
| Fruit, stone, group 12-12 | 0.30 |
| Goat, fat | 0.40 |
| Goat, meat | 0.15 |
| Goat, meat byproducts | 6.0 |
| Grain aspirated fractions | 25 |
| Grape | 0.05 |
| Hog, fat | 0.40 |
| Hog, meat | 0.15 |
| Hog, meat byproducts | 6.0 |
| Horse, fat | 0.40 |
| Horse, meat | 0.15 |
| Horse, meat byproducts | 6.0 |
| Juneberry | 0.10 |
| Lingonberry | 0.10 |
| Milk | 0.15 |
| Nut, tree, group 14-12 | 0.50 |
| Olive | 0.50 |
| Pistachio | 0.10 |
| Potato | 0.80 |
| Potato, chips | 1.6 |
| Potato granules/flakes | 2.0 |
| Poultry, fat | 0.15 |
| Poultry, meat | 0.15 |
| Poultry, meat byproducts | 0.60 |
| Rice, grain | 1.0 |
| Rice, hull | 2.0 |
| Salal | 0.10 |
| Sheep, fat | 0.40 |
| Sheep, meat | 0.15 |
| Sheep, meat byproducts | 6.0 |
| Soybean | 2.0 |
| Soybean, hulls | 10 |
(b) Section 18 emergency exemptions. [Reserved]
(c) Tolerances with regional restrictions. [Reserved]
(d) Indirect or inadvertent residues. Tolerances are established for indirect or inadvertent residues of glufosinate ammonium, including its metabolites and degradates, in or on the commodities in the table below, as a result of the application of glufosinate ammonium to crops listed in paragraph (a) of this section. Compliance with the tolerance levels specified below is to be determined by measuring the sum of glufosinate ammonium, butanoic acid, 2-amino-4-(hydroxymethylphosphinyl) monoammonium salt, and its metabolite, 3-(hydroxymethylphosphinyl) propanoic acid, expressed as 2-amino-4-(hydroxymethylphosphinyl)butanoic acid equivalents.
| Commodity | Parts per million |
|---|---|
| Barley, hay | 0.40 |
| Barley, straw | 0.40 |
| Buckwheat, fodder | 0.40 |
| Buckwheat, forage | 0.40 |
| Oat, forage | 0.40 |
| Oat, hay | 0.40 |
| Oat, straw | 0.40 |
| Rye, forage | 0.40 |
| Rye, straw | 0.40 |
| Teosinte | 0.40 |
| Triticale | 0.40 |
| Wheat, forage | 0.40 |
| Wheat, hay | 0.40 |
| Wheat, straw | 0.40 |
[68 FR 55849, Sept. 29, 2003, as amended at 71 FR 25945, May 3, 2006; 72 FR 72625, Dec. 21, 2007; 76 FR 23497, Apr. 27, 2011; 77 FR 59113, Sept. 26, 2012; 80 FR 72599, Nov. 20, 2015; 84 FR 21708, May 15, 2019]