Potato exports guide

Information on the conditions and phytosanitary requirements for the export of Scottish potatoes, where known by country.


Seed potatoes (updated 16 July 2019)

Growing crop tolerances

Class tolerances apply, except if the tolerances below are stricter:

  • Blackleg (Pectobacterium atrosepticum): NIL
  • Leafroll and mosaic viruses (total):  0.2%
  • Other viruses (total): 0.5%
  • Verticillium wilt: 0.5% 

Tuber tolerances

Minimum tolerances for seed export apply, except for:

  • Blackleg/Soft rot (Pectobacterium atrosepticum): NIL
  • Skin spot (Polyscytalum pustulans): NIL
  • Soil: 0%
  • Powdery scab (Spongospora subterranea): no more than 1.5% by weight (no surface tolerance)
  • Common scab (Streptomyces scabies): no more than 1.5% by weight (no surface tolerance)
  • Black scurf (Rhizoctonia solani): 
Surface area affected Tolerance by weight
up to 12.5% no more than 10%
more than 12.5% no more than 1.5%
Any (total tolerance) no more than 10%


Other requirements

Import permit: required.

Packaging: New and unused packaging only, free from soil 

Additional declarations to be included on the reverse of the phytosanitary certificate for seed potatoes

  1. Clavibacter michiganensis spp. sepedonicus (Corynebacterium sepedonicum) (Ring rot), Ralstonia (Pseudomonas) solanacearum (Brown rot), Leptinotarsa decemlineata (Colorado beetle) , Radolphus similis (Burrowing nematode) and Potato spindle tuber viroid (PSTVd) are not known to occur in Scotland.
  2. Synchytrium endobioticum (Potato wart disease) and Ditylenchus destructor (Stem nematode) are not known to have occurred in the area of production of the seed potatoes.
  3. Samples of soil from the land in which the potatoes were grown were drawn and tested by the Scottish Government prior to planting and revealed no trace of Globodera rostochiensis and G. pallida (Potato cyst nematodes).
  4. The seed potatoes and the parent plants were visually inspected and found free from Polyscytalum pustulans (Skin spot) and Pectobacterium atrosepticum (Erwinia carotovora ssp. atroseptica) (Blackleg/Bacterial soft rot).
  5. The rate of infection during crop growth with Potato leaf roll virus, leaf curl and mosaic viruses, other viral diseases and Verticillium spp. was within the allowed limits.
  6. The rate of infection with Rhizoctonia solani, Streptomyces scabies, Spongospora subterranea and Phytophthora infestans is within the allowed limits.
  7. The seed lots are practically free of soil contamination.
  8. The consignment was examined and found to be in conformity to the Plant Quarantine Import Requirements of the Republic of Yemen and certified accordingly within 14 days prior to dispatch.


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