7 CFR § 51.1565 - Internal defects.

---
identifier: "/us/cfr/t7/s51.1565"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "7 CFR § 51.1565 - Internal defects."
title_number: 7
title_name: "Agriculture"
section_number: "51.1565"
section_name: "Internal defects."
chapter_name: "AGRICULTURAL MARKETING SERVICE (STANDARDS, INSPECTIONS, MARKETING PRACTICES), DEPARTMENT OF AGRICULTURE"
subchapter_number: "C"
subchapter_name: "REQUIREMENTS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE EGG PRODUCTS INSPECTION ACT"
part_number: "51"
part_name: "FRESH FRUITS, VEGETABLES, AND OTHER PRODUCTS (INSPECTION, CERTIFICATION, AND STANDARDS)"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 1621-1627."
cfr_part: "51"
---


# 51.1565 Internal defects.

*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 ⁄ inch in diameter in a potato 2⁄-inches in diameter or 6 ounces in weight. | Area affected not to exceed that of a circle ⁄ inch in diameter in a potato 2⁄-inches in diameter or 6 ounces in weight. |
| Light Brown Discoloration (Brown Center) | Area affected not to exceed that of a circle ⁄ inch in diameter in a potato 2⁄ inches in diameter or 6 ounces in weight. | Area affected not to exceed that of a circle ⁄ inch in diameter in a potato 2⁄ inches in diameter or 6 ounces in weight. |
|  |  |  |
| Internal Brown Spot and Similar Discoloration (Heat Necrosis) | Not more than the equivalent of 3 scattered spots ⁄ inch in diameter in a potato 2⁄-inches in diameter or 6 ounces in weight. | Not more than the equivalent of 6 scattered spots ⁄ inch in diameter in a potato 2⁄-inches in diameter or 6 ounces in weight. |
| Note: Correspondingly lesser or greater areas in smaller or larger potatoes. |  |  |

[35 FR 18258, Dec. 1, 1970. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981; amended at 56 FR 7553, Feb. 25, 1991; 56 FR 10302, Mar. 11, 1991; 73 FR 15058, Mar. 21, 2008 ; 73 FR 70586, Nov. 21, 2008; 76 FR 31789, June 2, 2011]