ANNEX IIMinimum Conditions for certified seed potatoes
(2)The conditions for certified seed potatoes of ‘Union grade B’ shall be as follows:
- (a)
conditions concerning seed potatoes:
- (i)
the number of plants not breeding true to the variety and the number of plants of a different variety shall, together, not exceed 0,5 %;
- (ii)
the number of growing plants affected by blackleg shall not exceed 4,0 %;
- (iii)
in the direct progeny the number of plants with symptoms of virus infection shall not exceed 10,0 %;
- (iv)
the number of growing plants with mosaic symptoms or symptoms caused by leaf roll virus shall not exceed 6,0 %;
- (i)
- (b)
tolerances applicable to lots, as regards the following impurities, blemishes and diseases:
- (i)
seed potatoes affected by rots, other than ring rot or brown rot, shall not exceed 0,5 % by mass, of which seed potatoes affected by wet rot shall not exceed 0,2 % by mass;
- (ii)
seed potatoes affected by black scurf over more than 10 % of their surface shall not exceed 5,0 % by mass;
- (iii)
seed potatoes affected by common scab over more than one third of their surface shall not exceed 5,0 % by mass;
- (iv)
seed potatoes affected by powdery scab over more than 10 % of their surface shall not exceed 3,0 % by mass;
- (v)
shrivelled tubers due to excessive dehydration or dehydration caused by silver scurf shall not exceed 1,0 % by mass;
- (vi)
seed potatoes with external blemishes, including misshapen or damaged tubers, shall not exceed 3,0 % by mass;
- (vii)
presence of earth and extraneous matter shall not exceed 2,0 % by mass;
- (viii)
the total percentage of seed potatoes covered by tolerances, as referred to in points (i) to (vi), shall not exceed 8,0 % by mass.
- (i)