180.226—Diquat; tolerances for residues.
(a) General.
(1)
Tolerances are established for residues of the plant growth regulator and herbicide diquat, (6,7-dihydrodipyrido (1,2-a:2′1′-c)pyrazinediium) derived from application of the dibromide salt and calculated as the cation in or on the following food commodities:
| Commodity | Parts per million |
|---|---|
| Alfalfa, seed | 3.0 |
| Cattle, fat | 0.05 |
| Cattle, meat | 0.05 |
| Cattle, meat byproducts | 0.05 |
| Canola, meal | 6.0 |
| Canola, seed | 2.0 |
| Egg | 0.05 |
| Goat, fat | 0.05 |
| Goat, meat | 0.05 |
| Goat, meat byproducts | 0.05 |
| Hog, fat | 0.05 |
| Hog, meat | 0.05 |
| Hog, meat byproducts | 0.05 |
| Horse, fat | 0.05 |
| Horse, meat | 0.05 |
| Horse, meat byproducts | 0.05 |
| Milk | 0.02 |
| Potato | 0.1 |
| Poultry, fat | 0.05 |
| Poultry, meat | 0.05 |
| Poultry, meat byproducts | 0.05 |
| Sheep, fat | 0.05 |
| Sheep, meat | 0.05 |
| Sheep, meat byproducts | 0.05 |
(2)
(i)
Tolerances are established for residues of the herbicide diquat (6,7 dihydrodipyrido(1,2-a:2'1'-c)pyrazinediium) (calculated as the cation) derived from the application of the dibromide salt to ponds, lakes, reservoirs, marshes, drainage ditches, canals, streams, and rivers which are slow-moving or quiescent in programs of the Corp of Engineers or other Federal or State public agencies and to ponds, lakes and drainage ditches only where there is little or no outflow of water and which are totally under the control of the user, in or on the following food commodities:
| Commodity | Parts per million |
|---|---|
| Avocado | 0.2 |
| Berry group 13 | 0.05 |
| Cotton, undelinted seed | 0.2 |
| Cranberry | 0.05 |
| Fish | 2.0 |
| Fruit, citrus, group 10 | 0.05 |
| Fruit, pome, group 11 | 0.02 |
| Fruit, stone, group 12 | 0.02 |
| Grain, cereal, forage, fodder and straw, group 16 | 0.02 |
| Grain, cereal, group 15 | 0.02 |
| Grape | 0.05 |
| Grass, forage, fodder and hay, group 17 | 0.2 |
| Hop, dried cones | 0.2 |
| Nut, tree, group 14 | 0.02 |
| Shellfish | 20.0 |
| Strawberry | 0.05 |
| Sugarcane, cane | 0.2 |
| Vegetable, brassica, leafy, group 5 | 0.05 |
| Vegetable, cucurbit, group 9 | 0.02 |
| Vegetable, foliage of legume, group 7 | 0.2 |
| Vegetable, fruiting, group 8 | 0.05 |
| Vegetable, leafy, except brassica, group 4 | 0.05 |
| Vegetable, root and tuber, group 1 | 0.02 |
| Vegetable, seed and pod | 0.05 |
(ii)
Where tolerances are established at higher levels from other uses of diquat on the subject crops, the higher tolerances applies also to residues of the aquatic uses cited in this paragraph.
(3)
Tolerances are established for the plant growth regulator diquat (6,7 dihydrodipyrido(1,2-a:2'1'-c)pyrazinediium) derived from application of the dibromide salt and calculated as the cation in or on the following food commodites:
| Commodity | Parts per million |
|---|---|
| Banana1 | 0.05 |
| Coffee, bean, green1 | 0.05 |
| Soybean, hulls | 0.6 |
| 1There are no U.S. registrations as of May 26, 2010. | |
(4)
A tolerance of 0.5 part per million is established for residues of diquat in potato, granules/flakes and potato, chips.