(a) General. Tolerances are established for residues of the plant growth inhibitor, 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 both trinexapac-ethyl, ethyl 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylate and the associated metabolite, trinexpac, 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 | 0.8 |
| Sugarcane, molasses | 2.5 |
| 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]
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