Code of Federal Regulations Title 7. Agriculture § 7.51.3416 Classification of defects

EXTERNAL DEFECTS

Air cracks․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Blackleg․․․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Bruises․․․․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste

Cuts․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

Smooth, not more than 10% of surface.

Smooth, not more than 1/3 of surface.

Enlarged lenticels, discolored or sunken.

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Flea Beetle․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste

Folded end․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Fusarium tuber rot․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Grass, wireworm․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Greening, light․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Growth cracks․․․․․․․․․․․․․․․․․․․․

See Footnote No. 2.․․․․․․․․․․․․․․

10% waste.

Grub․․․․․․․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Ingrown sprouts․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Nematodes․․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Rhizoctonia, solid or thick mounded.

Not more than 10% of surface.․․․․

Not more than 25% of surface.

Rodent, bird damage.․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Scab, pitted․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Scab, russet․․․․․․․․․․․․․․․․․․․․․

25% of surface or 5% waste.․․․․․․

50% of surface or 10% waste.

Scab, surface․․․․․․․․․․․․․․․․․․․․

25% of surface or 5% waste.․․․․․․

50% of surface or 10% waste.

Scab, surface (elephant hide)․․․․

10% of surface or 5% waste.․․․․․․

25% of surface or 10% waste.

Second growth․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Scaling, surface cracks–when cracked, thick and has depth.

10% of surface or 5% waste.․․․․․․

25% of surface or 10% waste.

Sunburn․․․․․․․․․․․․․․․․․․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Sunken discolored areas.․․․․․․․․․

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

INTERNAL DEFECTS

Defects

Maximum allowed for U.S. No. 1 processing

Maximum allowed for U.S. No. 2 processing

Occurring outside of or not entirely confined to the vascular ring

Internal Black Spot, Internal Discoloration, Vascular Browning, Fusarium Wilt, Net Necrosis, Other Necrosis, Stem End Browning.

5% waste․․․․․․․․․․․․․․․․․․․․․․․․․

10% waste.

Occurring entirely within the vascular ring

Hollow Heart or Hollow Heart with Discoloration.

Area affected not to exceed that of a circle 7/8 inch in diameter in a 10 ounce potato.¹

Area affected not to exceed that of a circle 1 1/4 inches in diameter in a 10 ounce potato.¹

Light Brown Discoloration (Brown Center).

Area affected not to exceed that of a circle 7/8 inch in diameter in a 10 ounce potato.¹

Area affected not to exceed that of a circle 1 1/4 inches in diameter in a 10 ounce potato.¹

Internal Brown Spot and similar discoloration (Heat Necrosis).

Not more than the equivalent of 3 scattered spots 1/8 inch in diameter in a potato 6 ounces in weight or 2 1/2 inches in diameter, or correspondingly lesser or greater number of spots in smaller or larger potatoes.

Not more than the equivalent of 6 scattered spots 1/8 inch in diameter in a potato 6 ounces in weight or 2 1/2 inches in diameter or correspondingly lesser or greater number of spots in smaller or larger potatoes.