180.473—Glufosinate ammonium; tolerances for residues.
(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 in this paragraph. Compliance with the tolerance levels specified in this paragraph is to be determined by measuring only the sum of glufosinate ammonium, 2-amino-4-(hydroxymethylphosphinyl)butanoic acid monoammonium salt, and its metabolites, 2-(acetylamino)-4-(hydroxymethylphosphinyl)butanoic acid and 3-(hydroxymethylphosphinyl)propionic acid, calculated as the stoichiometric equivalent of 2-amino-4-(hydroxymethylphosphinyl)butanoic acid, in or on the commodity.
| 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 |
| Cotton, gin byproducts | 15 |
| Cotton, undelinted seed | 4.0 |
| Egg | 0.15 |
| 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 | 0.10 |
| 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 |
| Rice, straw | 2.0 |
| Salal | 0.10 |
| Sheep, fat | 0.40 |
| Sheep, meat | 0.15 |
| Sheep, meat byproducts | 6.0 |
| Soybean | 2.0 |
| Soybean, hulls | 5.0 |
(d) Indirect or inadvertent residues.
Tolerances are established for indirect or inadvertent residues of the herbicide glufosinate ammonium, including its metabolites and degradates, in or on the commodities in the table in this paragraph when present therein as a result of the application of glufosinate ammonium to crops listed in paragraph (a) of this section. Compliance with the tolerance levels specified in this paragraph is to be determined by measuring only the sum of glufosinate ammonium, 2-amino-4-(hydroxymethylphosphinyl)butanoic acid monoammonium salt, and its metabolite, 3-(hydroxymethylphosphinyl)propionic acid, calculated as the stoichiometric equivalent of 2-amino-4-(hydroxymethylphosphinyl)butanoic acid, in or on the commodity.
| 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 |