# Commission Implementing Directive 2014/21/EU of 6 February 2014 determining minimum conditions and Union grades for pre-basic seed potatoes (Text with EEA relevance), Annex: Conditions for placing on the market of pre-basic seed potatoes as Union grades PBTC and PB

Extent: E+W+S+N.I.

(1) The conditions for pre-basic seed potatoes of Union grade PBTC shall be as follows:
(a) conditions concerning seed potatoes:
(i) plants not breeding true to the variety, or plants of a different variety, shall not be present in the crop;
(ii) plants, including tubers, are produced through micro-propagation;
(iii) plants, including tubers, are produced in a protected facility and in a growing medium which is free from pests;
(iv) tubers shall not be multiplied beyond the first generation;
(v) plants shall comply with the following thresholds concerning the presence of RNQPs, or symptoms caused by the respective RNQP, as set out in the following table:
RNQPs or symptoms caused by RNQPs
Threshold for the presence of RNQPs on the growing plants for pre-basic seed potatoes of Union grade PBTC
Blackleg ( Dickeya Samson et al . spp. [1DICKG]; Pectobacterium Waldee emend. Hauben et al . spp. [1PECBG])
0 %
Candidatus Liberibacter solanacearum Liefting et al . [LIBEPS]
0 %
Candidatus Phytoplasma solani Quaglino et al . [PHYPSO]
0 %
Mosaic symptoms caused by viruses
and
symptoms caused by Potato leaf roll virus [PLRV00]
0 %
Potato spindle tuber viroid [PSTVD0]
0 %
RNQPs or symptoms caused by RNQPs
Threshold for the presence of RNQPs on the direct progeny of pre-basic seed potatoes of Union grade PBTC
Symptoms of virus infection
0 %.
(b) conditions concerning lots:
(i) they shall be free from seed potatoes affected by rots;
(ii) they shall be free from seed potatoes affected by common scab;
(iii) they shall be free from seed potatoes excessively shrivelled due to dehydration;
(iv) they shall be free from seed potatoes with external blemishes, including misshapen or damaged tubers;
(v) lots of pre-basic seed potatoes shall comply with the following thresholds concerning the presence of RNQPs, or symptoms caused by the respective RNQPs as set out in the following table:
RNQPs or symptoms caused by RNQPs
Threshold for the presence of RNQPs on the lots of pre-basic seed potatoes of Union grade PBTC by mass
Candidatus Liberibacter solanacearum Liefting et al . [LIBEPS]
0 %
Ditylenchus destructor Thorne [DITYDE]
0 %
Black scurf as caused by Thanatephorus cucumeris (A.B. Frank) Donk [RHIZSO]
0 %
Powdery scab as caused by Spongospora subterranea (Wallr.) Lagerh. [SPONSU]
0 %.
(2) The conditions for pre-basic seed potatoes of Union grade PB 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 together, shall not exceed 0,01 %;
(ii) plants shall comply with the following thresholds concerning the presence of RNQPs, or symptoms caused by the respective RNQPs, as set out in the following table:
RNQPs or symptoms caused by RNQPs
Threshold for the presence of RNQPs on the growing plants for pre-basic seed potatoes of Union grade PB
Blackleg ( Dickeya Samson et al . spp . [1DICKG]; Pectobacterium Waldee emend. Hauben e t al . spp . [1PECBG])
0 %
Candidatus Liberibacter solanacearum Liefting et al . [LIBEPS]
0 %
Candidatus phytoplasma solani Quaglino et al . [PHYPSO]
0 %
Mosaic symptoms caused by viruses
and
symptoms caused by Potato leaf roll virus [PLRV00]
0,1 %
Potato spindle tuber viroid [PSTVD0]
0 %
RNQPs or symptoms caused by RNQPs
Threshold for the presence of RNQPs on the direct progeny of pre-basic seed potatoes of Union grade PB
Symptoms of virus infection
0,5 %;
(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 0,2 % by mass;
(ii) seed potatoes affected by common scab over more than one third of their surface, shall not exceed 5,0 % by mass;
(iii) shrivelled tubers due to excessive dehydration or dehydration caused by silver scurf, shall not exceed 0,5 % by mass;
(iv) seed potatoes with external blemishes, including misshapen or damaged tubers, shall not exceed 3,0 % by mass;
(v) the presence of earth and extraneous matter shall not exceed 1,0 % by mass;
(vi) lots of pre-basic seed potatoes shall comply with the following thresholds concerning the presence of RNQPs, or symptoms caused by the respective RNQPs as set out in the following table:
RNQPs or symptoms caused by RNQPs
Threshold for the presence of RNQPs on the lots of pre-basic seed potatoes of Union grade PB by mass
Candidatus Liberibacter solanacearum Liefting et al . [LIBEPS]
0 %
Ditylenchus destructor Thorne [DITYDE]
0 %
Black scurf affecting tubers over more than 10 % of their surface as caused by Thanatephorus cucumeris (A.B. Frank) Donk [RHIZSO]
1,0 %
Powdery scab affecting tubers over more than 10 % of their surface as caused by Spongospora subterranea (Wallr.) Lagerh. [SPONSU]
1,0 %;
(vii) the total percentage of seed potatoes covered by tolerances, as referred to in points (i) to (iv) and (vi), shall not exceed 6,0 % by mass.

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Source: https://www.legislation.gov.uk/eudr/2014/21/annex (the official version)
Page: https://openlegislation.uk/eu-directive-2014-21/annex
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.