PI-009: Seed Potato Tuber Inspection
Appendix 1: Standards for Tubers – Seeds Regulations Part II
This page is part of the Guidance Document Repository (GDR).
Looking for related documents?
Search for related documents in the Guidance Document Repository
|Disease or Defect||Tolerance by Count
at Shipping Point
|Tolerance by Count at Destination|
|Soft rot or wet breakdown||0.1 %||0.5 %|
|Dry rot, including late blight||1.0 %||1.0 %|
|Scab and Rhizoctonia combinedTable Note 7
|Stem-end discolouration due to top-killing, frost, heat or drought, with penetration from 6 mm to 13 mm||4.0 %||4.0 %|
|Malformed and damage||2.0 %||3.0 %|
|Total number of diseases and defectsTable Note 8||5.0 %||5.0 %|
- Table Note 7
The total of the combined light, and combined moderate Scab and Rhizoctonia categories must not exceed 10%. No severe Scab or Rhizoctonia is allowed.
- Table Note 8
The total of combined tolerances for diseases and defects (not including light scab, light Rhizoctonia and stem-end discolouration), shall not exceed 5% of the total number of tubers in the lot.
|Condition||Tolerance by Count|
|Tubers that are not firm||2.0 %|
|Outgrown sprouts (exceeding 20 mm)||10.0 %|
|Pressure bruises||5.0 %|
|Oversize and undersize||5.0 % by weight|
|Varietal Mixture||Tolerance by Count|
|Elite III||0.05 %|
|Elite IV||0.1 %|
Note: Descriptions and tolerances are for reference only; refer to Seeds Regulations Part II for complete information
- Date modified: