Article 2 Minimum conditions for pre-basic seed potatoesF1
United Kingdom
Member States shall ensure that pre-basic seed potatoes satisfy the following minimum conditions:
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;
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 %;
the maximum number of field generations shall be four;
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 % |
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.
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.