Seed potatoes (updated 16 July 2019)
Growing crop tolerances
Class tolerances apply.
Minimum tolerances for seed export apply, except for:
- Gangrene ( Phoma foveata): NIL
- Other rots: 0.1%
- Common scab (Streptomyces scabies): Dutch scab scale 1.5
- Black scurf (Rhizoctonia solani): Dutch scurf scale 10% light
- Silver scurf (Helminthosporium solani): 10% of tubers may have up to 12.5% surface area covered.
Sprouting: no more than 10% of tubers may have sprouts.
Additional declarations to be included on the reverse of the phytosanitary certificate for seed potatoes
- Potato wart disease (Synchytrium endobioticum) has never been found in Scotland on land used for seed potato production.
- Samples of soil from the land in which the potatoes were grown were drawn and tested by the Department prior to planting and revealed no trace of Potato cyst nematodes (Globodera rostochiensis and G. pallida).
- These tubers originate from areas known to be exempt from Ring rot (Clavibacter michiganensis ssp. sepedonicus), Brown rot (Ralstonia solanacearum), Wart disease (Synchytrium endobioticum), Potato cyst nematodes (Globodera rostochiensis and G. pallida) and Potato stolbur phytoplasma.
- Potato spindle tuber viroid is not known to occur in Scotland.
Additional declarations to be included on the reverse of the phytosanitary certificate for ware potatoes
Potato spindle tuber viroid is not known to occur in Scotland.