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The Seed Potatoes (Scotland) Regulations 2015

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5.—(1) This paragraph applies, for the purposes of regulation 16(1) and (3), to seed potatoes to which Table II, III (a), (b) or (c) or IV applies.

(2) Subject to sub-paragraph (3), an authorised officer may deem a potato in any sample of seed potatoes to which this paragraph applies not to be affected by a disease in Group III, specified in column 1 of the Table in relation to a potato of that grade when, in the officer’s opinion—

(a)the surface area of the potato affected by the disease is less than the percentage surface area in the entry corresponding to the disease in column 5 of the Table; and

(b)the potato has at least two eyes at the rose end wholly unaffected by the disease.

(3) Sub-paragraph (2) does not apply when the disease Powdery Scab (Spongospora subterranea (Wallr.) Lagerh) takes its cankerous form.

TABLE I

UNION GRADE PBTC PRODUCED IN SCOTLAND

Column 1

Diseases, pests, damage and defects

Column 2

Individual Tolerances

Group I
Potato Wart Disease (Synchytrium endobioticum (Schilb) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera spp. infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis subsp.sepedonicus (Spieck & Kotth) Daviset al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchiet al.)Nil
Potato Tuber Moth (Phthorimaea operculella (Zell))Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Leptinotarsa decemlineata (Say))Nil
Group II
Blackleg (Pectobacterium spp.)Nil
Dickeyaspp.Nil
Rots including Wet Rot but other than rots specified in Group INil
Frost damaged tubersNil
Group III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) Ellis)Nil
Black scurf (Rhizoctonia solani Kühn)Nil
Common scab (Streptomyces spp.)Nil
Powdery scab (Spongospora subterranea) (Wallr) Lagerh.f.sp.subterranea)Nil
Group IV
External blemishes or tubers other than diseased tubers whose shape is atypical for the varietyNil
Superficial necrosis caused by strains of Potato Virus YNil
Shrivelled tubersNil
Group V
Dirt or extraneous matter1.0%

TABLE II

UNION GRADE PB PRODUCED IN SCOTLAND

Column 1

Diseases, pests, damage and defects

Column 2

Individual Tolerances

Column 3

Group Tolerances

Column 4

Collective Group Tolerances

Column 5

Allowable % surface area cover

Group I
Potato Wart Disease (Synchytrium endobioticum (Schilb) Perc.)Nil
Potato TuberNil
Eelworm (Ditylenchus destructor Thorne)
Potato Cyst Nematode (Globodera spp. infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis subsp.sepedonicus (Spieck & Kotth) Daviset al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchiet al.)Nil
Potato Tuber Moth (Phthorimaea operculella (Zell))Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Leptinotarsa decemlineata (Say))Nil
Group II
Blackleg (Pectobacterium spp.)Nil0.2%}
Dickeyaspp.Nil}
Rots, other than rots specified in Group I0.2%}
Frost damaged tubers0.2%}
Group III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) Ellis)0.2%5.0%}
Black scurf (Rhizoctonia solani Kühn)1.0%}6.0%10.0%
Common scab (Streptomyces spp.)5.0%}33.3%
Powdery scab (Spongospora subterranea (Wallr) Lagerh.f.sp.subterranea)1.0%}10.0%
Group IV
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety3.0%3.0%}
Superficial necrosis caused by strains of Potato Virus YNil}
Shrivelled tubers0.5%}
Group V
Dirt or extraneous matter1%1%

TABLE III

UNION GRADE S, SE AND E AND TEST AND TRIAL SEED POTATOES

a) UNION GRADE S PRODUCED IN SCOTLAND

Column 1

Diseases, pests, damage and defects

Column 2

Individual Tolerances

Column 3

Group Tolerances

Column 4

Collective Group Tolerances

Column 5

Allowable % surface area cover

Group I
Potato Wart Disease (Synchytrium endobioticum (Schilb) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera spp. infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis subsp.sepedonicus (Spieck & Kotth) Daviset al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchiet al.)Nil
Potato Tuber Moth (Phthorimaea operculella (Zell)Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Leptinotarsa decemlineata (Say)Nil
Group II
Dickeyaspp.Nil}
Rots, other than rots specified in Group I0.5%0.5%}
(of which Wet Rot)(0.2%)}
Frost damaged tubers0.5%}
Group III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) Ellis)0.5%5.0%}12.5%
Black scurf (Rhizoctonia solani Kühn)5.0%}6.0%10.0%
Common scab (Streptomyces spp.)5.0%}33.3%
Powdery scab (Spongospora subterranea (Wallr) Lagerh.f.sp.subterranea)3.0%}10.0%
Group IV
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety3.0%3.0%}
Superficial necrosis caused by strains of Potato Virus Y0.1%}
Shrivelled tubers1.0%}
Group V
Dirt or extraneous matter1.0%1.0%
b) UNION GRADE SE PRODUCED IN SCOTLAND

Column 1

Diseases, pests, damage and defects

Column 2

Individual Tolerances

Column 3

Group Tolerances

Column 4

Collective Group Tolerances

Column 5

Allowable % surface area cover

Group I
Potato Wart Disease (Synchytrium endobioticum (Schilb) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera spp. infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis subsp.sepedonicus (Spieck & Kotth) Daviset al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchiet al.)Nil
Potato Tuber Moth (Phthorimaea operculella (Zell))Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Leptinotarsa decemlineata (Say))Nil
Group II
Dickeyaspp.Nil}
Rots, other than rots specified in Group I0.5%}
(of which Wet Rot)(0.2%)}
Frost damaged tubers0.5%}
Group III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) Ellis)0.5%5.0%}12.5%
Black scurf (Rhizoctonia solani Kühn)5.0%}6.0%10.0%
Common scab (Streptomyces spp.)5.0%}33.3%
Powdery scab (Spongospora subterranea (Wallr) Lagerh.f.sp.subterranea)3.0%}10.0%
Group IV
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety3.0%3.0%}
Superficial necrosis caused by strains of Potato Virus Y0.1%}
Shrivelled tubers1.0%}
Group V
Dirt or extraneous matter1.0%1.0%
c) UNION GRADE E AND TEST AND TRIAL SEED POTATOES PRODUCED IN SCOTLAND

Column 1

Diseases, pests, damage and defects

Column 2

Individual Tolerances

Column 3

Group Tolerances

Column 4

Collective Group Tolerances

Column 5

Allowable % surface area cover

Group I
Potato Wart Disease (Synchytrium endobioticum (Schilb) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera spp. infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis subsp.sepedonicus(Spieck & Kotth) Daviset al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchiet al.)Nil
Potato Tuber Moth (Phthorimaea operculella(Zell))Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Leptinotarsa decemlineata (Say))Nil
Group II
Dickeyaspp.Nil}
Rots, other than rots specified in Group I0.5%0.5%}
(of which Wet Rot)(0.2%)}
Frost damaged tubers0.5%}
Group III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) Ellis)0.5%5.0%}12.5%
Black scurf (Rhizoctonia solani Kühn)5.0%}10.0%
Common scab (Streptomyces spp.)5.0%}6.0%33.3%
Powdery scab (Spongospora subterranea (Wallr) Lagerh.f.sp.subterranea)3.0%}10.0%
Group IV
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety3.0%3.0%}
Superficial necrosis caused by strains of Potato Virus Y0.1%}
Shrivelled tubers1.0%}
Group V
Dirt or extraneous matter1.0%

TABLE IV

BASIC SEED POTATOES INTENDED FOR MARKETS OUTSIDE THE EU

Column 1

Diseases, pests, damage and defects

Column 2

Individual Tolerances

Column 3

Group Tolerances

Column 4

Collective Group Tolerances

Column 5

Allowable % surface area cover

Group I
Potato Wart Disease (Synchytrium endobioticum (Schilb) Perc.)Nil
Potato Tuber Eelworm (Ditylenchus destructor Thorne)Nil
Potato Cyst Nematode (Globodera spp. infesting potatoes)Nil
Ring Rot (Clavibacter michiganensis subsp.sepedonicus (Spieck & Kotth) Daviset al.)Nil
Brown Rot (Ralstonia solanacearum (Smith) Yabuuchiet al.)Nil
Potato Tuber Moth (Phthorimaea operculella (Zell))Nil
Potato Spindle Tuber ViroidNil
Colorado Beetle (Leptinotarsa decemlineata (Say))Nil
Group II
Dickeyaspp.Nil}
Rots including Wet Rot but other than rots specified in Group I0.2%0.2%}
Frost damaged tubers0.2%}
Group III
Skin spot (Polyscytalum pustulans (Owen & Wakefield) Ellis)0.5%1.5%}12.5%
Black scurf (Rhizoctonia solani Kühn)1.5%}4.7%12.5%
Common scab (Streptomyces spp.)1.5%}12.5%
Powdery scab (Spongospora subterranea (Wallr) Lagerh.f.sp.subterranea)1.5%}12.5%
Group IV
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety1.0%3.0%}
Superficial necrosis caused by strains of Potato Virus Y0.1%}
External necrosis (caused by viruses other than Potato Virus Y)2.0%}
Shrivelled tubers2.0%}
Group V
Dirt or extraneous matter0.5%

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