§ 180.226 - Diquat; tolerances for residues.  


Latest version.
  • § 180.226 Diquat; tolerances for residues.

    (a) General.

    (1) Tolerances are established for the residues of the plant growth regulator and herbicide diquat, including its metabolites and degradates, in or on the commodities in Table 1 to this paragraph (a)(1) resulting from the application of the dibromide salt of diquat. Compliance with the tolerance levels specified in Table 1 to this paragraph (a)(1) is to be determined by measuring only diquat (6,7-dihydrodipyrido ([1,2-a:2′1′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, seed3.0
    Cattle, fat0.05
    Cattle, meat0.05
    Cattle, meat byproducts0.05
    Canola, meal6.0
    Canola, seed2.0
    Egg0.05
    Goat, fat0.05
    Goat, meat0.05
    Goat, meat byproducts0.05
    Hog, fat0.05
    Hog, meat0.05
    Hog, meat byproducts0.05
    Horse, fat0.05
    Horse, meat0.05
    Horse, meat byproducts0.05
    Milk0.02
    Pea and bean, dry and shelled, except soybean, subgroup 6C1 0.9
    Potato0.1
    Poultry, fat0.05
    Poultry, meat0.05
    Poultry, meat byproducts0.05
    Sheep, fat0.05
    Sheep, meat0.05
    Sheep, meat byproducts0.05

    (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
    Avocado0.2
    Berry group 130.05
    Cotton, undelinted seed0.2
    Cranberry0.05
    Fish2.0
    Fruit, citrus, group 100.05
    Fruit, pome, group 110.02
    Fruit, stone, group 120.02
    Grain, cereal, forage, fodder and straw, group 160.02
    Grain, cereal, group 150.02
    Grape0.05
    Grass, forage, fodder and hay, group 170.2
    Hop, dried cones0.2
    Nut, tree, group 140.02
    Shellfish20.0
    Strawberry0.05
    Sugarcane, cane0.2
    Vegetable, brassica, leafy, group 50.05
    Vegetable, cucurbit, group 90.02
    Vegetable, foliage of legume, group 70.2
    Vegetable, fruiting, group 80.05
    Vegetable, leafy, except brassica, group 40.05
    Vegetable, root and tuber, group 10.02
    Vegetable, seed and pod0.05

    (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, hulls0.6

    (4) A tolerance of 0.5 part per million is established for residues of diquat in potato, granules/flakes and potato, chips.

    (b) Section 18 emergency exemptions. [Reserved]

    (c) Tolerances with regional registrations. [Reserved]

    (d) Indirect or inadvertent residues. [Reserved]

    [65 FR 33709, May 24, 2000, as amended at 72 FR 41929, Aug. 1, 2007; 75 FR 29441, May 26, 2010; 75 FR 60241, Sept. 29, 2010; 85 FR 67290, Oct. 22, 2020]