View all text of Subpart JJ [§ 51.3410 - § 51.3418]
§ 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. |
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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. |
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1 Note: Or correspondingly lesser or greater areas in smaller or larger potatoes.