Standards for Tubers
48.1 (1) Seed potatoes of a class established in section 47 shall meet the standards prescribed in subsection (2).
(2) The percentage of tubers in any lot showing symptoms of any disease or defect set out in Column I of an item of the table to this subsection shall not, at the point of shipping, exceed the percentage set out in Column II of that item and shall not, at destination, exceed the percentage set out in Column III of that item.
Column I Column II Column III Item Disease or Defect Percentage by Count at Shipping Point Percentage by Count at Destination 1. Soft rot or wet breakdown 0.1 0.5 2. Dry rot, including late blight 1.0 1.0 3. Scab and Rhizoctonia combined (a) light 10.0 10.0 (b) moderate 5.0 5.0 4. Stem-end discolouration due to top-killing, frost, heat or drought, with penetration from 6 to 13 mm 4.0 4.0 5. Malformed and damage 2.0 3.0
(3) For the purposes of the table to subsection (2),
- “light Rhizoctonia”
“light Rhizoctonia” means that 1 to 5 per cent of the tuber surface is covered with Rhizoctonia sclerotia; (rhizoctonie légère)
- “light scab”
“light scab” means that 1 to 5 per cent of the tuber surface is covered with common scab lesions; (gale légère)
- “moderate Rhizoctonia”
“moderate Rhizoctonia” means that 5 to 10 per cent of the tuber surface is covered with Rhizoctonia sclerotia; (rhizoctonie modérée)
- “moderate scab”
“moderate scab” means that 5 to 10 per cent of the tuber surface is covered with common scab lesions. (gale modérée)
(4) In any lot, the number of tubers that are affected by light and moderate scab and Rhizoctonia combined shall not exceed 10 per cent of the total number of tubers in the lot.
(5) [Repealed, SOR/2002-198, s. 4]
(6) The percentage of tubers found in a lot of any class that is of a variety other than the variety of which the lot generally consists shall not exceed the percentage permitted by sections 47.11 to 47.8 for that class.
(7) In any lot, the number of tubers in the aggregate that are affected by disease and defects, not including light scab, light Rhizoctonia and stem-end discolouration, shall not exceed 5 per cent of the total number of tubers in the lot.
(8) At the point of shipping, not more than 5 per cent of tubers in a lot shall be affected by pressure bruising on over 10 per cent of their surface.
(9) At the point of shipping, not more than 10 per cent of the tubers in a lot shall have sprouts longer than 2 cm.
(10) In any lot, at least 98 per cent of tubers shall be firm and well shaped.
(11) No tubers in any lot shall be washed.
- SOR/91-526, s. 1;
- SOR/2002-198, s. 4.
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