(a) General. Tolerances are established for residues of the plant growth regulator, trinexapac-ethyl, 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 only the free and conjugated forms of both trinexapac-ethyl, ethyl 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylate and trinexapac, 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylic acid, calculated as the stoichiometric equivalent of trinexapac-ethyl, in or on the commodity.
| Commodity | Parts per million |
|---|---|
| Barley, bran | 2.5 |
| Barley, grain | 2.0 |
| Barley, hay | 0.8 |
| Barley, straw | 0.4 |
| Cattle, fat | 0.02 |
| Cattle, meat | 0.02 |
| Cattle, meat byproducts | 0.04 |
| Goat, fat | 0.02 |
| Goat, meat | 0.02 |
| Goat, meat byproducts | 0.04 |
| Grass, forage | 1.5 |
| Grass, hay | 4.0 |
| Grass, seed screenings | 40.0 |
| Grass, straw | 10.0 |
| Hog, fat | 0.02 |
| Hog, meat | 0.02 |
| Hog, meat by-products | 0.03 |
| Horse, fat | 0.02 |
| Horse, meat | 0.02 |
| Horse, meat byproducts | 0.04 |
| Oat, forage | 1.0 |
| Oat, grain | 4.0 |
| Oat, hay | 1.5 |
| Oat, straw | 0.9 |
| Poppy, seed imported1 | 8 |
| Rice, bran | 1.5 |
| Rice, grain | 0.4 |
| Rice, straw | 0.07 |
| Rice, wild, grain | 0.4 |
| Rye, bran | 6.0 |
| Rye, grain | 4.0 |
| Rye, hay | 1.5 |
| Rye, straw | 0.9 |
| Sheep, fat | 0.02 |
| Sheep, meat | 0.02 |
| Sheep, meat byproducts | 0.04 |
| Sugarcane, cane | 1.5 |
| Sugarcane, molasses | 5 |
| Wheat, bran | 6.0 |
| Wheat, forage | 1.0 |
| Wheat, grain | 4.0 |
| Wheat, hay | 1.5 |
| Wheat, middlings | 10.5 |
| Wheat, straw | 0.9 |
(b) Section 18 emergency exemptions. [Reserved]
(c) Tolerances with regional registrations. [Reserved]
(d) Indirect or inadvertent residues. [Reserved]
[77 FR 12745, Mar. 2, 2012, as amended at 77 FR 60919, Oct. 3, 2012; 80 FR 28848, May 20, 2015; 83 FR 11422, Mar. 15, 2018; 85 FR 70064, Nov. 4, 2020]