Potatoes Grades and Standards

Grades of Potatoes

U.S. No. 1 consists of potatoes which meet the following requirements:
1. Similar varietal characteristics, except when designated as a mixed or specialty pack;
2. Firm;
3. Fairly clean;
4. Fairly well shaped;
5. Free from:
  1. Freezing;
  2. Blackheart;
  3. Late blight, southern bacterial wilt and ring rot; and,
  4. Soft rot and wet breakdown.
6. Free from damage by any other cause. See §§51.1564 and 51.1565.
7. Size. Not less than 1-7/8 inches in diameter, unless otherwise specified in connection with the grade.
8. For tolerances see §51.1546.
U.S. Commercial consists of potatoes which meet the requirements of U.S. No. 1 grade except for the following:
1. Free from serious damage caused by:
  1. Dirt or other foreign matter;
  2. Russet scab; and,
  3. Rhizoctonia.
2. Increased tolerances for defects specified in §51.1546.
U.S. No. 2 consists of potatoes which meet the following requirements:
1. Similar varietal characteristics, except when designated as a mixed or specialty pack;
2. Not seriously misshapen;
3. Free from:
  1. Freezing;
  2. Blackheart;
  3. Late blight, southern bacterial wilt and ring rot; and,
  4. Soft rot and wet breakdown.
4. Free from serious damage by any other cause. See §§51.1564 and 51.1565.
5. Size. Not less than 1-1/2 inches in diameter, unless otherwise specified in connection with the grade.
6. For tolerances see §51.1546.

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