# 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), Article 2: Minimum conditions for pre-basic seed potatoes

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

1. Member States shall ensure that pre-basic seed potatoes satisfy the following minimum conditions:
(a) they derive from mother plants which are free from the following pests: Pectobacterium spp., Dickeya spp., Candidatus Liberibacter solanacearum , Candidatus Phytoplasma solani , Potato spindle tuber viroid, Potato leaf roll virus, Potato virus A, Potato virus M, Potato virus S, Potato virus X, and Potato virus Y;
(b) the number of growing plants not breeding true to the variety and the number of plants of a different variety together, shall not exceed 0,01 %;
(c) the maximum number of field generations shall be four;
(d) RNQPs, or symptoms caused by the respective RNQPs, shall not be present above the thresholds on the pre-basic seed potatoes 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
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]
0,1 %
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
Symptoms of virus infection
0,5 %
2. Member States shall provide that pre-basic seed potatoes may be marketed as ‘ Union grades PBTC ’ and ‘ Union grade PB ’ , in accordance with the conditions set out in the Annex.
3. Compliance with the requirements of points (b) and (d) of paragraph 1 shall be established through official field inspections. In case of doubt, those inspections shall be supplemented by official tests on leaves.
Where methods of micro-propagation are used, compliance with point (a) of paragraph 1 shall be established by official testing, or testing under official supervision, of the mother plant.
Where methods of clonal selection are used, compliance with point (a) of paragraph 1 shall be established by official testing, or testing under official supervision, of the clonal stock.

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Source: https://www.legislation.gov.uk/eudr/2014/21/article/2 (the official version)
Page: https://openlegislation.uk/eu-directive-2014-21/article-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.