Title 7

SECTION 51.3416

51.3416 Classification of defects.

§ 51.3416 Classification of defects.

External Defects

Defects Maximum allowed for U.S. No. 1 processing Maximum allowed for U.S. No. 2 processing
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.

1 Note: Or correspondingly lesser or greater areas in smaller or larger potatoes.