{
  "url": "https://openlegislation.uk/seed-potatoes-wales-regulations-2016/schedule-3/part-3",
  "json_url": "https://openlegislation.uk/seed-potatoes-wales-regulations-2016/schedule-3/part-3.json",
  "legislation": "wsi/2016/106",
  "legislation_title": "The Seed Potatoes (Wales) Regulations 2016",
  "legislation_url": "https://openlegislation.uk/seed-potatoes-wales-regulations-2016",
  "path": "schedule/3/part/3",
  "kind": "part",
  "number": "3",
  "heading": "Basic seed potatoes and certified seed potatoes produced in Wales",
  "text": "Column 1\nColumn 2\nColumn 3\nColumn 4\nSpecified diseases or pests, damage and defects\nIndividual tolerances\nGroup tolerances\nCollective group tolerances\nGroup I\nWart Disease (Synchytrium endobioticum (Schlib) Perc)\nNil\n-\n-\nPotato Tuber Eelworm (Ditylenchus destructor Thorne)\nNil\n-\n-\nPotato Cyst Nematode (Globodera species infesting potatoes)\nNil\n-\n-\nRing Rot (Clavibacter michiganensis (Smith) Davis et al spp sepedonicus (Spieck & Kotth) Davis et al)\nNil\n-\n-\nBrown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al)\nNil\n-\n-\nPotato Spindle Tuber Viroid\nNil\n-\n-\nColorado Beetle (Lepinotarsa decemlineata (Say))\nNil\n-\n-\nCandidatus Liberibacter solanacearum Liefting et al\nNil\n-\n-\nCandidatus Phytoplasma solani Quaglino et al\nNil\n-\n-\nGroup II\nBlight (Phytophthora infestans (Mont) de Bary)\n0.5%\n)\n)\nBlackleg (Dickeya Samson et al. spp. or Pectobacterium Waldee emend. Hauben et al. spp. or both)\n0.5%\n)\n)\nSoft Rots including Watery Wound Rot (Pythium ultimum Trow)\n0.5%\n)\n)\nPink Rot (Phytophthora erythroseptica Pethybridge) and Pit Rot\n0.5%\n) 0.5%\n)\nDry Rot (Fusarium species)\n0.5%\n)\n)\nGangrene (Phoma species)\n0.5%\n)\n)\nFrost damaged tubers\n0.5%\n)\n)\nAny of these Group II defects that present as a wet rot symptom\n0.2%\n)\n)6.0% for basic seed potatoes and 8.0% for certified seed potatoes\nGroup III\nSkin spot (Polyscytalum pustulans (Owen & Wakefield) M B Ellis)\n0.5% except GB grade E, GB grade A and GB grade B grades; 2.0% for GB grade E, GB grade A and GB grade B grades only\n)\n)\nPowdery scab (Spongospora subterranea (Wallr) Legerh)\n3.0%\n) 5.0%\n)\nProvided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-tenth of whose surface area has been affected are deemed to be unaffected by the disease (except where powdery scab takes its cankerous form)\nGroup IV\nBlack scurf as caused by Thanatephorus cucumeris (A.B. Frank) Donk Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-tenth of whose surface area has been affected are deemed to be unaffected by the disease\n5.0%\n)\n)\nCommon Scab (Streptomyces species) Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-third of whose surface area has been affected are deemed to be unaffected by the disease\n5.0%\n)\n)\nGroup V\nExternal blemishes including damaged tubers or tubers other than diseased tubers whose shape is atypical for the variety\n3.0%\n)\n)\nShrivelled tubers due to excessive dehydration or dehydration caused by silver scurf (Helminthosporium solani)\n1.0%\n) 3.0%\n)\nSuperficial necrosis caused by strains of potato virus Y\n0.1%\n)\n)\nGroup VI\nDirt or other extraneous matter\n1.0%\n-\n-",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 3 Pts. 2, 3 substituted (29.8.2020) by The Marketing of Seed, Plant and Propagating Material (Wales) Regulations 2020 (S.I. 2020/833), regs. 1, 5(4)(c)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Word in Sch. 3 Pt. 3 substituted (31.12.2020) by The Seed Potatoes (Wales) (Amendment) (EU Exit) Regulations 2019 (S.I. 2019/738), regs. 1(2), 2(14)(b) (as amended by S.I. 2020/1573, regs. 1(2)(b), 2(3)(l)); 2020 c. 1, Sch. 5 para. 1(1)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2016/106/schedule/3/part/3",
    "retrieved_at": "2026-10-28T23:31:17.660399+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}