Seed potatoes (updated 16 July 2019)
Growing crop tolerances
Class tolerances apply, except if the tolerances below are stricter:
- all viruses: NIL
Minimum tolerances for seed export apply, except for:
- Bacterial soft rot (Erwinia carotovora): NIL
- Common scab (Streptomyces scabies): Dutch scab scale 1.0
- Powdery scab (Spongospora subterranea): Dutch scab scale 1.0
- Black scurf (Rhizoctonia solani): Dutch scurf scale 10% light
Class: only class Elite or higher is accepted.
Size: tubers should be in the range of 35 to 45 mm.
Chemicals: consignments should be treated with a broad spectrum fungicide.
Packaging: wooden crates with 30 kg seed each. Wood packaging should be treated and certified. Wood material should comply with International Standards for Phytosanitary Measures (ISPM 15) on wood packaging materials.
Documentation: the date of harvest, the dormancy period of the variety and the storage conditions should be given.
Delivery: between 15 and 20 October each year.
Additional declarations to be included on the reverse of the phytosanitary certificate for seed potatoes
- Potato Wart Disease (Synchytrium endobioticum) is not known to have occurred on the land where the crop was grown.
- The potatoes in the consignment are suitable for seed purposes and the crops from which they were drawn were examined whilst growing by the Department's inspectors, and were certified true to type. The potatoes are classified according to variety and standards specified by the certification authority in Scotland.
- The potatoes are substantially free from injurious diseases and pests and any other defects likely to impair their quality.
- Potato brown rot Ralstonia solanacearum), Potato ring rot (Clavibacter michiganensis ssp. sepedonicus), Colorado beetle (Leptinotarsa decemlineata), Japanese beetle (Popillia japonica) and Potato tuber moth (Phthorimaea operculella) are not known to occur in Scotland.
- At visual inspection the potatoes were found to be free from Blackleg (Erwinia carotovora) and potato virus diseases.