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The Seed Potatoes (Wales) Regulations 2006

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Regulations 2(3), 9(3), 12(5) and 21(1)(3) and (4)

SCHEDULE 3SPECIFIED DISEASES OR PESTS, DAMAGE AND DEFECTS AND TOLERANCES

PART IPre-basic seed potatoes of pre-basic TC class produced in Wales

Column 1Column 2
Specified diseases or pests, damage and defectsIndividual tolerances
GROUP I
Wart Disease (Synchytrium endobioticum (Schlib.) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera species infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis (Smith) Davis et al. spp. sepedonicus (Spieck. & Kotth.) Davis et al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al.)Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Lepinotarsa decemlineata (Say))Nil
GROUP II
Blight (Phytophthora infestans (Mont.) de Bary)Nil
Blackleg (Erwinia carotovora (Jones) Bergey et al. spp. atroseptica (Hellmers & Dowson) Dye or Erwinia chrysanthemi Burkholder et al. or both)Nil
Soft Rots including: Watery Wound Rot (Pythium ultimum Trow)Nil
Pink Rot (Phytophthora erythroseptica Pethybridge) and Pit RotNil
Dry Rot (Fusarium species)Nil
Gangrene (Phoma species)Nil
Frost damaged tubersNil
GROUP III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis)Nil
GROUP IV
Black Scurf (Rhizoctonia solani Kuhn)Nil
Common Scab (Streptomyces species)Nil
GROUP V
Powdery scab (Spongospora subterranea (Wallr.) Legerh.)Nil
GROUP VI
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety3.0%
GROUP VII
Dirt or other extraneous matter1.0%

PART IIPre-basic seed potatoes of pre-basic 1, pre-basic 2, pre-basic 3 or pre-basic 4 class produced in Wales

Column 1Column 2Column 3Column 4
Specified diseases or pests, damage and defectsIndividual tolerancesGroup tolerancesCollective group tolerances
GROUP I
Wart Disease (Synchytrium endobioticum (Schlib.) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera species infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis (Smith) Davis et al. spp. sepedonicus (Spieck. & Kotth.) Davis et al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al.)Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Lepinotarsa decemlineata (Say))Nil
GROUP II
Blight (Phytophthora infestans (Mont.) de Bary)0.2%
Blackleg (Erwinia carotovora (Jones) Bergey et al. spp. atroseptica (Hellmers & Dowson) Dye or Erwinia chrysanthemi Burkholder et al. or both)Nil))
Soft Rots including: Watery Wound Rot (Pythium ultimum Trow)0.2%))
Pink Rot (Phytophthora erythroseptica Pethybridge) and Pit Rot0.2%) 0.2%)
Dry Rot (Fusarium species)0.2%))
Gangrene (Phoma species)0.2%))
Frost damaged tubers0.2%))
GROUP III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis)0.2%)) 4.0%
GROUP IV
Black Scurf (Rhizoctonia solani Kuhn)1.0%) 3.0%)
Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-eighth of whose surface area has been affected are to be deemed to be unaffected by the disease.
Common Scab (Streptomyces species)3.0%))
Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-quarter of whose surface area has been affected are to be deemed to be unaffected by the disease.
GROUP V
Powdery scab (Spongospora subterranea (Wallr.) Legerh.)1.0%))
Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-eighth of whose surface area has been affected are to be deemed to be unaffected by the disease.
GROUP VI
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety1.0%
Superficial necrosis caused by potato virus YNil
GROUP VII
Dirt or other extraneous matter1.0%

PART IIIBasic seed potatoes and certified seed potatoes produced in Wales

Column 1Column 2Column 3Column 4
Specified diseases or pests, damage and defectsIndividual tolerancesGroup tolerancesCollective group tolerances
GROUP I
Wart Disease (Synchytrium endobioticum (Schlib.) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera species infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis (Smith) Davis et al. spp. sepedonicus (Spieck. & Kotth.) Davis et al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al.)Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Lepinotarsa decemlineata (Say))Nil
GROUP II
Blight (Phytophthora infestans (Mont.) de Bary)1.0%))
Blackleg (Erwinia carotovora (Jones) Bergey et al. spp. atroseptica (Hellmers & Dowson) Dye or Erwinia chrysanthemi Burkholder et al. or both)1.0%))
Soft Rots including Watery Wound Rot (Pythium ultimum Trow)1.0%) 1.0%)
Pink Rot (Phytophthora erythroseptica Pethybridge) and Pit Rot1.0%))
Dry Rot (Fusarium species)1.0%))
Gangrene (Phoma species)1.0%))
Frost damaged tubers1.0%))
Provided that in respect of seed potatoes of a Community Grade the individual tolerances listed in column 2 and the group tolerances listed in column 3 do not exceed 0.5%.
GROUP III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis)0.5% except for A and CC classes;))
2.0% for A and CC classes only
Powdery scab (Spongospora subterranea (Wallr.) Legerh.)3.0%) 4.0%) 4.0%
Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-eighth of whose surface area has been affected are to be deemed to be unaffected by the disease (except where powdery scab takes its cankerous form).
GROUP IV
Black Scurf (Rhizoctonia solani Kuhn)3.0%))
Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-quarter of whose surface area has been affected in respect of class A and class CC and one-eighth unaffected in respect of all other classes are to be deemed to be unaffected by the disease.
Common Scab (Streptomyces species)4.0%))
Provided that seed potatoes which have at least two eyes at the rose end that are wholly unaffected and less than one-quarter of whose surface area has been affected are to be deemed to be unaffected by the disease.
GROUP V
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety2.0%2.0%)
Superficial necrosis caused by strains of potato virus Y0.1%
GROUP VI
Dirt or other extraneous matter1.0%

PART IVTest and trial seed potatoes

Column 1Column 2Column 3
Specified diseases or pests, damage and defectsIndividual tolerancesCollective tolerances
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera species infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis (Smith) Davis et al. spp. sepedonicus (Spieck. & Kotth.) Davis et al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al.)Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Lepinotarsa decemlineata (Say))Nil
Wart Disease (Synchytrium endobioticum (Schlib.) Perc.)Nil
Earth or other extraneous matter2.0 %
Dry and wet rot, except if caused by Synchytrium endobioticum, Clavibacter michiganensis (Smith) Davis et al. ssp. Sepedonicus (Spieck. & Kotth.) Davis et al. or Ralstonia solanacearum (Smith) Yabuuchi et al.1.0 %)
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety3.0 %) 6.0 %
Common scab: tubers affected over more than one-third of their surface5.0 %)

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