U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
Internal defects are defects which cannot be detected without cutting the potato. Some internal defects are listed in Table VII.
Table VII—Internal Defects
| Defects | Damage Maximum Allowed | Serious Damage Maximum Allowed |
|---|---|---|
| Ingrown Sprouts, Internal Discoloration, Vascular Browning, Fusarium Wilt, Net Necrosis, Other Necrosis, Stem End Browning | 5 percent waste | 10 percent waste. |
| Internal Black Spot | When the spot(s) are darker than the official color chip (POT-CC-2) after removing 5 percent of the total weight of the potato | When the spot(s) are darker than the official color chip (POT-CC-2) after removing 10 percent of the total weight of the potato. |
| Hollow Heart or Hollow Heart with Discoloration | Area affected not to exceed that of a circle
| Area affected not to exceed that of a circle
|
| Light Brown Discoloration (Brown Center) | Area affected not to exceed that of a circle
| Area affected not to exceed that of a circle
|
| Internal Brown Spot and Similar Discoloration (Heat Necrosis) | Not more than the equivalent of 3 scattered spots
| Not more than the equivalent of 6 scattered spots
|
1Note: Correspondingly lesser or greater areas in smaller or larger potatoes.
