Paragraph 5 Allowable surface area cover
(1)
This paragraph applies, for the purposes of regulation 13(1)(b), to seed potatoes to which Table II, III, IV or V applies.
(2)
Subject to 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, set out in column 1 of the Table applicable to a potato of that class when, in his 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)
Paragraph (2) shall not apply when the disease Powdery Scab (Spongospora subterranea(Wallr.) Lagerh) takes its cankerous form.
TABLE I
PRE-BASIC TC CLASS
| Column 1 | Column 2 |
|---|---|
| Diseases, pests, damage and defects | Individual Tolerances |
| GROUP I | |
| Wart Disease (Synchytrium endobioticumSchilb.) | NIL |
| Potato Tuber Eelworm (Ditylenchus destructorThorne) | NIL |
| Potato Cyst Nematode (Globoderaspecies infesting potatoes) | NIL |
| Ring Rot (Clavibacter michiganensis(Smith) Davis et al ssp. | NIL |
| Sepedonicus (Spieck Kotth) Davis et al) | |
| Brown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al) | NIL |
| Potato Tuber Moth (Phthorimaea operculella (Zell) | NIL |
| Potato Spindle Tuber Viroid | NIL |
| Colorado Beetle (Leptinotarsa decemlineata (Say)) | NIL |
| GROUP II | |
| Blight (Phytophthora infestans (Mont) de Bary) | NIL |
| Blackleg (Erwinia carotovora Jones) Bergey et al ssp atroseptica | NIL |
| (Hellmers & Dowson) Dye) or Erwinia chrysanthemi Burkholder et al or both | |
| Gangrene/ Dry Rot/Wet Rot | NIL |
| Frost damaged tubers | NIL |
| GROUP II | |
| Skin spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis | NIL |
| Black scurf (Rhizoctonia solani Kuhn) | NIL |
| Common scab (Streptomyces species) | NIL |
| Powdery scab (Spongospora subterranea (Wallr) Lagerh) | NIL |
| GROUP IV | |
| External blemishes or tubers other than diseased tubers whose shape is atypical for the variety | 3% |
| GROUP V | |
| Dirt or other extraneous matter | 1% |
TABLE II
PRE-BASIC 1 AND PRE-BASIC 2 CLASS
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
|---|---|---|---|---|
| Diseases, pests, damage and defects | Individual tolerances | Group Tolerances | Collective group tolerances | Allowable % surface area cover |
| GROUP I | ||||
| Wart Disease (Synchytrium endobioticumSchilb.) | NIL | – | – | |
| Potato Tuber Eelworm (Ditylenchus destructorThorne) | NIL | – | – | |
| Potato Cyst Nematode (Globoderaspecies infesting potatoes) | NIL | – | – | |
| Ring Rot (Clavibacter michiganensis (Smith) Davis et al ssp. Sepedonicus (Spieck Kotth) Davis et al) | NIL | – | – | |
| Brown Rot (Ralstonia solanacearum (Smith) Yabuuchi et al) | NIL | – | – | |
| Potato Tuber Moth (Phthorimaea operculella (Zell) | NIL | – | – | |
| Potato Spindle Tuber Viroid | NIL | – | – | |
| Colorado Beetle (Leptinotarsa decemlineata (Say)) | NIL | – | – | |
| GROUP II | ||||
| Blight (Phytophthora infestans (Mont) de Bary | 0.1% | 0.2% | ||
| Blackleg (Erwinia carotovora (Jones) Bergey et al ssp atroseptica (Hellmers & Dowson) Dye) or Erwinia chrysanthemi Burkholder et al or both | Nil | 0.2% | 4.0% | |
| Gangrene/ Dry Rot/Wet Rot | 0.1% | 0.2% | 4.0% | |
| Frost damaged tubers | 0.1% | 0.2% | 4.0% | |
| GROUP III | ||||
| Skin spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis | 0.2% | 3.0% | 4.0% | |
| Black scurf (Rhizoctonia solani Kuhn) | 0.5% | 3.0% | 4.0% | 12.5% |
| Common scab (Streptomyces species) | 3.0% | 3.0% | 4.0% | 25.0% |
| Powdery scab (Spongospora subterranea (Wallr) Lagerh) | 0.5% | 3.0% | 4.0% | 12.5% |
| GROUP IV | ||||
| External blemishes or tubers other than diseased tubers whose shape is atypical for the variety | 1.0% | 4.0% | ||
| GROUP V | ||||
| Dirt or other extraneous matter | 1.0% |
TABLE III
VTSC CLASS AND EQUIVALENT IN OTHER PARTS OF THE UK
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
|---|---|---|---|---|
| Diseases, pests, damage and defects | Individual tolerances | Group Tolerances | Collective group tolerances | Allowable % surface area cover |
| GROUP I | ||||
| Wart Disease (Synchytrium endobioticum (Schilb) 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 ssp sepedonicus (Spieck. & Kotth.) Davis et al) | NIL | – | – | |
| Brown Rot (Ralstonia solancearum (Smith) Yabuuchi et al.) | NIL | – | – | |
| Potato Tuber Moth (Phthorimaea operculella (Zell) | NIL | – | – | |
| Potato Spindle Tuber Viroid | NIL | – | – | |
| Colorado Beetle (Leptinotarsa decemlineata (Say)) | NIL | – | – | |
| GROUP II | ||||
| Blight (Phytophthora infestans (Mont.) de Bary | 0.5% | 0.5% | 4.0.% | |
| Blackleg (Erwinia carotovora (Jones) Bergey et al. ssp atroseptica (Hellmers & Dowson) Dye) or Erwinia chrysanthemi Burkholder et al or both | NIL | 0.5% | 4.0.% | |
| Wet Rot including: Watery Wound Rot (Pythium ultimumTrow) | 0.5% | 0.5% | 4.0.% | |
| Pink Rot (Phytophthora erythroseptica Pethybridge) and Pit Rot | 0.5% | 0.5% | 4.0.% | |
| Dry Rot (Fusarium species) | 0.5% | 0.5% | 4.0.% | |
| Gangrene (Phoma species) | 0.5% | 0.5% | 4.0% | |
| Frost damaged tubers | 0.5% | 0.5% | 4.0.% | |
| GROUP III | ||||
| Skin Spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis) | 0.5% | 3.0.% | 4.0.% | |
| Black Scurf (Rhizoctonia solani Kuhn) | 1.5% | 3.0% | 4.0.% | 25.0% |
| Common Scab (Streptomyces species) | 3.0% | 3.0.% | 4.0.% | 25.0% |
| Powdery Scab (Spongospora subterranea (Wallr) Lagerh.) | 1.5% | 3.0% | 4.0.% | 12.5% |
| GROUP IV | ||||
| External blemishes or tubers other than diseased tubers whose shape is atypical for the variety | 2.0% | 4.0.% | ||
| GROUP V | ||||
| Dirt or other extraneous matter | 1.0% | 1.0% | – |
TABLE IV
BASIC SEED POTATOES OTHER THAN VTSC CLASS AND EQUIVALENT IN OTHER PARTS OF THE UK
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
|---|---|---|---|---|
| Diseases, pests, damage and defects | Individual tolerances | Group Tolerances | Collective group tolerances | Allowable % surface area cover |
| GROUP I | ||||
| Wart Disease (Synchytrium endobioticum (Schilb) 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 ssp sepedonicus (Spieck. & Kotth.) Davis et al) | NIL | – | – | |
| Brown Rot (Ralstonia solancearum (Smith) Yabuuchi et al.) | NIL | – | – | |
| Potato Tuber Moth (Phthorimaea operculella (Zell) | NIL | – | – | |
| Potato Spindle Tuber Viroid | NIL | – | – | |
| Colorado Beetle (Leptinotarsa decemlineata (Say)) | NIL | – | – | |
| GROUP II | ||||
| Blight (Phytophthora infestans (Mont.) de Bary | 0.5% | 0.5% | 4.0% | |
| Blackleg (Erwinia carotovora (Jones) Bergey et al. ssp atroseptica (Hellmers & Dowson) Dye) or Erwinia chrysanthemi Burkholder et al or both | 0.5% | 0.5% | 4.0% | |
| Wet Rot including: Watery Wound Rot (Pythium ultimum Trow) | 0.5% | 0.5% | 4.0% | |
| Pink Rot (Phytophthora erythroseptica Pethybridge) and Pit Rot | 0.5% | 0.5% | 4.0% | |
| Dry Rot (Fusarium species) | 0.5% | 0.5% | 4.0% | |
| Gangrene (Phoma species) | 0.5% | 0.5% | 4.0% | |
| Frost damaged tubers | 0.5% | 0.5% | 4.0% | |
| GROUP III | ||||
| Skin Spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis) | 2.0% | 4.0% | 4.0% | 12.5% |
| Powdery Scab (Spongospora subterranea (Wallr) Lagerh.) | 3.0% | 4.0% | 4.0% | 12.5% |
| Black Scurf (Rhizoctonia solani Kuhn) | 3.0% | 4.0% | 4.0% | 25.0% |
| Common Scab (Streptomyces species) | 4.0% | 4.0% | 4.0% | 25.0% |
| GROUP IV | ||||
| External blemishes or tubers other than diseased tubers whose shape is atypical for the variety | 2.0% | 4.0% | 4.0% | |
| GROUP V | ||||
| Dirt or other extraneous matter | 1.0% | – |
TABLE V
BASIC SEED POTATOES PRODUCED OUTSIDE SCOTLAND AND NOT PRODUCED IN THE UK
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
|---|---|---|---|---|
| Diseases, pests, damage and defects | Individual tolerances | Group Tolerances | Collective group tolerances | Allowable % surface area cover |
| GROUP I | ||||
| Wart Disease (Synchytrium endobioticum (Schilb) 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 ssp sepedonicus (Spieck. & Kotth.) Davis et al) | NIL | – | ||
| Brown Rot (Ralstonia solancearum (Smith) Yabuuchi et al.) | NIL | – | ||
| Potato Tuber Moth (Phthorimaea operculella Zell) | NIL | – | ||
| Potato Spindle Tuber Viroid | NIL | – | ||
| Colorado Beetle (Leptinotarsa decemlineata (Say)) | NIL | – | ||
| GROUP II | ||||
| Dry and Wet Rot | 0.5% | 6.0% | ||
| GROUP III | ||||
| Common Scab (Streptomyces species) | 5.0.% | 6.0% | 33.3% | |
| GROUP IV | ||||
| External blemishes or tubers other than diseased tubers whose shape is atypical for the variety | 3.0% | 6.0% | ||
| GROUP V | ||||
| Dirt or other extraneous matter | 2.0% | – |