Commission Implementing Regulation (EU) 2019/2072Show full title

PART F U.K. Measures to prevent the presence of the RNQPs on seed potatoes

The competent authority or, if so required, the professional operator under the official supervision of the competent authority, shall carry out checks and take any other actions to ensure that the requirements concerning the respective RNQPs and plants for planting, provided for in the following table, are fulfilled.

RNQPs or symptoms caused by RNQPs	Plants for planting	Requirements
Blackleg (Dickeya Samson et al. spp.; Pectobacterium Waldee emend. Hauben et al. spp.)	Solanum tuberosum L.	(a) In the case of pre-basic seed potatoes: official inspections show that they derive from mother plants which are free from Dickeya Samson et al. spp. and Pectobacterium Waldee emend. Hauben et al. spp. (b) In the case of all categories: the growing plants have been subjected to official field inspection by competent authorities.
Candidatus Liberibacter solanacearum Liefting et al.	Solanum tuberosum L.	(a) In the case of pre-basic seed potatoes: official inspections show that they derive from mother plants which are free from Candidatus Liberibacter solanacearum Liefting et al.. (b) In the case of all categories: (i) plants have been produced in areas known to be free from Candidatus Liberibacter solanacearum Liefting et al., taking into account the possible presence of the vectors; or (ii) no symptoms of Candidatus Liberibacter solanacearum Liefting et al. have been seen during official inspections by competent authorities of growing plants at the site of production since the start of the last complete cycle of vegetation.
Candidatus Phytoplasma solani Quaglino et al.	Solanum tuberosum L.	(a) In the case of pre-basic seed potatoes: official inspections show that they derive from mother plants which are free from Candidatus Phytoplasma solani Quaglino et al. (b) In the case of all categories: (i) no symptoms of Candidatus Phytoplasma solani Quaglino et al. have been seen at the place of production during official inspection since the start of the last complete cycle of vegetation; or (ii) any plants at the site of production showing symptoms have been rogued out, with their progeny tubers, and destroyed, for any stocks in which symptoms have been seen in the growing crop, official post harvest tuber testing has been carried out, for each lot, to confirm the absence of Candidatus Phytoplasma solani Quaglino et al.
Mosaic symptoms caused by viruses and: symptoms caused by: Potato leaf roll virus	Solanum tuberosum L.	(a) In the case of pre-basic seed potatoes: they derive from mother plants which are free from Potato virus A, Potato virus M, Potato virus S, Potato virus X, Potato virus Y and Potato leaf roll virus. Where methods of micro-propagation are used, compliance with this point shall be established by official testing, or testing under official supervision, of the mother plant. Where methods of clonal selection are used, compliance with this point shall be established by official testing, or testing under official supervision, of the clonal stock. (b) In the case of all categories, the growing plants have been subjected to official inspection by the competent authorities.
Potato spindle tuber viroid	Solanum tuberosum L.	(a) In the case of clonal stock: Official testing, or testing under official supervision, has shown that they derive from mother plants which are free from Potato spindle tuber viroid. (b) In the case of pre-basic and basic seed potatoes: no symptoms of Potato spindle tuber viroid have been found. or for each lot, official post-harvest testing of tubers have been performed and those tubers have been found free from Potato spindle tuber viroid. (c) In the case of certified seed potatoes, official visual inspection has shown that they are free from the pest, and testing is carried out if any symptoms of the pest are seen.

RNQPs or symptoms caused by RNQPs	Plants for planting	Requirements
Symptoms of virus infection	Solanum tuberosum L.	During official inspection of the direct progeny, the number of symptomatic plants shall not exceed the percentage indicated in Annex IV.

RNQPs or symptoms caused by RNQPs	Plants for planting	Requirements
Candidatus Liberibacter solanacearum Liefting et al.	Solanum tuberosum L.	The competent authority has subjected the lots to official inspection and confirms that they comply with the respective provisions of Annex IV.
Ditylenchus destructor Thorne	Solanum tuberosum L.	The competent authority has subjected the lots to official inspection and confirms that they comply with the respective provisions of Annex IV.
Black scurf affecting tubers over more than 10 % of their surface as caused by Thanatephorus cucumeris (A.B. Frank) Donk	Solanum tuberosum L	The competent authority has subjected the lots to official inspection and confirms that they comply with the respective provisions of Annex IV.
Powdery scab affecting tubers over more than 10 % of their surface as caused by Spongospora subterranea (Wallr.) Lagerh.	Solanum tuberosum L	The competent authority has subjected the lots to official inspection and confirms that they comply with the respective provisions of Annex IV.

In addition, the competent authorities shall carry out official inspections to ensure that the presence of RNQPs on the growing plants shall not exceed the thresholds set out in the following table:

RNQPs or symptoms caused by RNQPs	Plants for planting (genus or species)	Threshold for the growing plants for pre-basic seed potatoes		Threshold for the growing plants for basic seed potatoes	Threshold for the growing plants for certified seed potatoes
		PBTC	PB
Blackleg (Dickeya Samson et al. spp. [1DICKG]; Pectobacterium Waldee emend. Hauben et al. spp. [1PECBG])	Solanum tuberosum L.	0 %	0 %	1,0 %	4,0 %
Candidatus Liberibacter solanacearum Liefting et al. [LIBEPS]	Solanum tuberosum L.	0 %	0 %	0 %	0 %
Candidatus Phytoplasma solani Quaglino et al. [PHYPSO]	Solanum tuberosum L.	0 %	0 %	0 %	0 %
Mosaic symptoms caused by viruses and symptoms caused by leaf roll virus [PLRV00]	Solanum tuberosum L.	0 %	0,1 %	0,8 %	6,0 %
Potato spindle tuber viroid [PSTVD0]	Solanum tuberosum L.	0 %	0 %	0 %	0 %