SCHEDULE 7TOLERANCES FOR DISEASES, PESTS, DAMAGE AND DEFECTS

Regulations 12(b) and 13(1) and (4)

Tolerances1

1

For the purposes of regulation 13(1)(b)–

a

Table I, applies–

i

to seed potatoes classified under these Regulations as being of the class Pre-basic TC; and

ii

to pre-basic seed potatoes produced outside Scotland which are approved by Scottish Ministers as being equivalent to that class;

b

Table II applies–

i

to seed potatoes classified under these Regulations as being of the class Pre-basic 1 or 2; and

ii

to pre-basic seed potatoes produced outside Scotland which are approved by Scottish Ministers as being equivalent to either of these classes;

c

Table III applies–

i

to seed potatoes classified under these Regulations as being of the classes VTSC1 or VTSC2; and

ii

to seed potatoes produced in any other part of the United Kingdom which are approved by Scottish Ministers as being of a class equivalent to either of these classes;

d

Table IV applies–

i

to seed potatoes classified under these Regulations as being seed potatoes of a class other than VTSC1 or VTSC2; and

ii

to seed potatoes produced in any other part of the United Kingdom which are approved by Scottish Ministers as basic seed potatoes equivalent to any of the classes other than VTSC1 or VTSC2; and

e

Table V applies in the case of basic seed potatoes produced outside Scotland and not in the United Kingdom.

2

Subject to paragraph (3), any tolerance in a column of any of the Tables in this Schedule expressed as a percentage is a reference to the proportion which the weight of potatoes affected by the disease, pest, damage or defect bears to the total weight of the sample taken in accordance with regulation 16(3) and Schedule 9, expressed as a percentage.

3

In the case of dirt or other extraneous matter, any tolerance in a column of any of the Tables in this Schedule expressed as a percentage is a reference to the proportion which the weight of such matter bears to the total weight of the sample taken in accordance with regulation 16(3) and Schedule 9, expressed as a percentage.

Individual tolerances2

The individual tolerance set out in the entry in column 2 of Table I, II, III, IV or, as the case may be, V corresponding to the disease, pest, damage or defect set out in column 1 of those Tables is specified in the case of seed potatoes to which the Table applies in relation to the disease, pest, damage or defect to which the entry corresponds.

Group tolerances3

The group tolerances set out in the entry in column 3 of Table II, III or, as case may be, IV corresponding to the diseases, pests, damage or defects within Group II or III set out in column 1 of those Tables is specified in the case of seed potatoes to which the Table applies in relation to the Group to which the entry corresponds.

Collective group tolerances4

The collective group tolerances set out in the entry in column 4 of Table II, III, IV or, as the case may be, V corresponding to the diseases, pests, damage or defects within Groups II, III and IV set out in column 1 of those Tables is specified in the case of seed potatoes to which the Table applies in relation to those Groups.

Allowable surface area cover5

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 IPRE-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 IIPRE-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 IIIVTSC 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 IVBASIC 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 VBASIC 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%

–