Potatoes

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Table of Contents

1. General Requirements

  • 1.1 Grades
  • 1.2 Similar Varietal Characteristics
  • 1.3 Properly Packed
  • 1.4 Properly Marked
    • Table 1 Size - Weight Designations
  • 1.5 Packages

2. Size

  • 2.1 Requirements
  • 2.2 Measuring Size
  • 2.3 Special Lot Tolerance for Size

3. Maturity and Firmness

  • 3.1 Requirements
  • 3.2 Terminology Used

4. Colour and Cleanliness

5. Shape

6. Special Inspection Procedures

  • 6.1 Method of Cutting to Determine Waste
  • 6.2 Procedure for Sampling for Internal Defects
    • 6.2.1 Preliminary Examination
    • 6.2.2 Sampling Method for Internal Defects that have no External Indications (Composite)
    • 6.2.3 Sampling Method for Internal Defects that have External Indications

7. External Defects

  • 7.1 Air Cracks (C)
  • 7.2 Bruises (C) and (P)
  • 7.3 Cuts / Clipped Ends / Knobs Removed (P)
    • 7.3.1 Cuts
    • 7.3.2 Clipped Ends
    • 7.3.3 Knobs Removed
  • 7.4 Dried Stems (P)
  • 7.5 Dry Rot (P)
  • 7.6 Elephant Hide (P)
  • 7.7 Enlarged Lenticels (C) and (P)
  • 7.8 External (Surface) Discolouration (C)
  • 7.9 Freezing and / Chilling Injuries (C) and (P)
  • 7.10 Grass Damage / Wireworm Holes (P)
  • 7.11 Greening (C)
  • 7.12 Growth Cracks (P)
  • 7.13 Insect Injury (P)
  • 7.13.1 Flea Beetle Injury
  • 7.13.2 Grub Dammage
  • 7.14 Mechanical Damage (P)
  • 7.15 Nematode Damage (P)
  • 7.16 Rhizoctonia (P)
  • 7.17 Rodent and Bird Damage (P)
  • 7.18 Russetting (P)
  • 7.19 Scab (P)
    • 7.19.1 Pitted Scab
    • 7.19.2 Russett Scab
    • 7.19.3 Surface Scab
  • 7.20 Shape (P)
  • 7.21 Silver Scurf (C)
  • 7.22 Skin Checks or Thumbnail Marks (C)
  • 7.23 Skin Spot (P)
  • 7.24 Sprain (Corky Ring Spot) (C)
  • 7.25 Sunburn (P)
  • 7.26 Sunken Discoloured Areas with Underlying Flesh Discoloured (C)
  • 7.27 Surface Cracks (P)
  • 7.28 Tuber Moth Damage (C)
  • 7.29 Other External Defects

8. Internal Defects

  • 8.1 Black Heart (C)
  • 8.2 Black Leg (C)
  • 8.3 Hollow Heart (P)
  • 8.4 Internal Discoloration (C) and (P)
  • 8.5 Light Brown Discolouration (Brown Center) (P)
  • 8.6 Presence of Insects (C) and (P)
  • 8.7 Watery Translucent Flesh (C)
  • 8.8 Other Condition Defects

9. Decay and Wet Breakdown

10. Sprouts

  • 10.1 Sprouts (External) (C)
  • 10.2 Sprouts (Internal) (P)

11. Tolerances

  • 11.1 Table of Tolerances - Canada No. 1
  • 11.2 Table of Tolerances - Canada No. 2

12. Requirements for Movement of Potatoes

  • 12.1 Interprovincial Movement
  • 12.2 Import
  • 12.3 Export

References

Appendix I Assessing Severity of Scab and Rhizoctonia

Appendix II Shape of Potatoes

Appendix III Summary of the U.S. Potato Import Regulations

Appendix IV Fingerling Potatoes