Potatoes Grades and Standards

Grades of Potatoes

  1. 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.

  2. 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.

  3. 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.

Visual Aids

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Detailed standards, Inspection Instructions & Other Resources: