SCHEDULE 6Tolerances for diseases, pests, damage and defects in seed potato tubers

regulations 2(1), 16(1)(e) and 20(3)

Tolerances1

1

For the purposes of these Regulations—

a

Table 1 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 Northern Ireland which are approved by the Department as being equivalent to that class;

b

Table 2 applies—

i

to seed potatoes classified under these Regulations as being of the class Pre-basic 1, Pre-basic 2, Pre-basic 3 or Pre-basic 4; and

ii

to pre-basic seed potatoes produced outside Northern Ireland which are approved by the Department as being equivalent to these classes;

c

Table 3 applies to basic seed potatoes, conservation varieties and equivalent, and test and trial seed potatoes, produced in Northern Ireland or any other part of the United Kingdom which are approved by the Department as being equivalent to either of these classes; and

d

Table 4 applies in the case of basic seed potatoes produced outside 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 21(3) and Schedule 8, expressed as a percentage.

3

In the case of dirt or other extraneous matter, any tolerance in a Column of any 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 21(3) and Schedule 8, expressed as a percentage.

Individual tolerances2

The individual tolerances set out in the entry in Column 2 of Table 1, 2, 3 or, as the case may be, 4 corresponding to the disease, pest, damage or defect set out in Column 1 of these 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 2, 3, or, as the case may be, 4 corresponding to the diseases, pests, damage, or defects within Group 2 or 3 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 1, 2, 3, or, as the case may be, 4 corresponding to the diseases, pests, damage or defects within Group 2, 3 and 4 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 these Regulations, to seed potatoes to which Table 2, 3, or 4 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 3, set out in Column 1 of the Table applicable to a potato of that class 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

Paragraph (2) shall not apply when the disease Powdery Scab (Spongosporasubterranea (Wallr.) Lagerh) takes its cankerous form.

Table 1

PRE-BASIC TISSUE CULTURE CLASS

Column 1

Diseases, pests damage and defects

Column 2

Individual Tolerances

Group 1

Wart Disease (Synchytriumendobioticum (Schilb.))

NIL

Potato Tuber Eelworm (Ditylenchus destructor Thorne)

NIL

Potato Cyst Nematode (Globodera species infesting potatoes)

NIL

Ring Rot (Clavibactermichiganensis (Smith) Davis et al. ssp sepedonicus (Spieck & Kotth.) Davis et al.)

NIL

Brown Rot (Ralstoniasolanacearum (Smith) Yabuuchi et al.)

NIL

Potato Tuber Moth (Phthorimaeaoperculella (Zeller))

NIL

Potato Spindle Tuber Viroid

NIL

Colorado Beetle (Leptinotarsadecemblineata (Say))

NIL

Group 2

Blight (Phytopthorainfestatans (Mont. (de Bary)

NIL

Blackleg (Pectobacterium spp)

NIL

Gangrene (Phoma species)/Dry Rot (Fusarium species)/Wet Rot

NIL

Frost damaged tubers

NIL

Group 3

Skin Spot (Polyscytalumpustulans (Owen & Wakefield) M.B. Ellis)

NIL

Black Scurf (Rhizoctoniasolani Kuhn)

NIL

Common Scab (Streptomyces species)

NIL

Powdery Scab (Spongosporasubterranea (Wallr) Lagerh)

NIL

Group 4

External blemishes

3%

Group 5

Dirt or other extraneous matter

1%

Table 2

PRE-BASIC 1 TO PRE-BASIC 4 CLASS AND EQUIVALENT (NORTHERN IRELAND AND OTHER PARTS OF THE UK)

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 1

Wart Disease (Synchytriumendobioticum (Schilb.))

NIL

NIL

NIL

NIL

Potato Tuber Eelworm (Ditylenchus destructor Thorne)

NIL

NIL

NIL

NIL

Potato Cyst Nematode (Globodera species infesting potatoes)

NIL

NIL

NIL

NIL

Ring Rot (Clavibactermichiganensis (Smith) Davis et al. ssp. sepidonicus (Spieck & Kotth.) Davis et al.)

NIL

NIL

NIL

NIL

Brown Rot (Ralstoniasolanacearum (Smith) Yabuuchi et al.)

NIL

NIL

NIL

NIL

Potato Tuber Moth (Phthorimaeaoperculella Zeller))

NIL

NIL

NIL

NIL

Potato Spindle Tuber Viroid

NIL

NIL

NIL

NIL

Colorado Beetle (Leptinotarsadecemlineata (Say))

NIL

NIL

NIL

NIL

Group 2

Blight (Phytophthorainfestans (Mont.) de Bary)

0.2%

0.2%

4.0%

NIL

Blackleg (Pectobacterium spp.)

0.05%

0.02%

NIL

NIL

Gangrene (Phoma species)/Dry Rot (Fusarium species)/ Wet Rot

0.2%

0.2%

4.0%

NIL

Frost damaged tubers

0.2%

0.2%

4.0%

NIL

Group 3

Skin Spot (Polyscytalumpustalans (Owen & Wakefield) M.B. Ellis)

0.2%

3.0%

4.0%

NIL

Black Scurf (Rhizoctoniasolani Kuhn)

1.0%

3.0%

4.0%

12.5%

Powdery Scab (Spongosporasubterranea (Wallr) Lagerh)

1.0%

3.0%

4.0%

12.5%

Common scab (Streptomyces species)

3.0%

3.0%

4.0%

25.0%

Group 4

Blemishes such as damaged or misshapen tubers

1.0%

NIL

4.0%

NIL

Group 5

Dirt or other extraneous matter

1.0%

NIL

NIL

NIL

Note: The collective group tolerance in Column 4 applies to Groups 2, 3, and 4 in Column 1.

Table 3

BASIC SEED POTATO CLASSES AND EQUIVALENT, INCLUDING TEST AND TRIAL SEED POTATOES AND CONSERVATION VARIETY SEED POTATOES (NORTHERN IRELAND AND OTHER PARTS OF THE UK)

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 1

Wart Disease (Synchytriumendobioticum (Schilb.))

NIL

NIL

NIL

NIL

Potato Tuber Eelworm (Ditylenchus destructor Thorne)

NIL

NIL

NIL

NIL

Potato Cyst Nematode (Globodera species infesting potatoes)

NIL

NIL

NIL

NIL

Ring Rot (Clavibactermichiganensis (Smith) Davis et al. ssp.sepedonicus (Spieck & Kotth.) Davis et al.)

NIL

NIL

NIL

NIL

Brown Rot (Ralstoniasolanacearum (Smith) Yabuuchi et al.)

NIL

NIL

NIL

NIL

Potato Tuber Moth (phthorimaeaoperculella (Zeller))

NIL

NIL

NIL

NIL

Potato Spindle Tuber Viroid

NIL

NIL

NIL

NIL

Colorado Beetle (Leptinotarsadecemlineata (Say))

NIL

NIL

NIL

NIL

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 2

Blight (Phytophthorainfestans (Mont.) de Bary)

0.2%

0.5%

4.0%

NIL

Blackleg (Erwiniacarotovora (Jones)) Bergey et al. ssp. atroseptica (Hellmers & Dowson) Dye) or Dickeyadadantii (Erwiniachrysanthemi)

0.2%

0.5%

5.0%

NIL

Soft/Wet Rot

0.2%

0.5%

5.0%

NIL

Dry Rot (Fusarium species)

0.4%

0.5%

5.0%

NIL

Gangrene (Phoma species)

0.4%

0.5%

5.0%

NIL

Frost damaged tubers

0.2%

0.5%

5.0%

NIL

Group 3

Skin Spot (Polyscytalumpustulans (Owen & Wakefield) M.B. Ellis)

2.0%

5.0%

5.0%

12.5%

Black Scurf (Rhizoctaniasolani Kuhn)

3.0%

4.0%

4.0%

25.0%

Common Scab (Streptomyces species)

5.0%

5.0%

5.0%

33.3%

Powdery Scab (Spongosporasubterranea (Wallr) Lagerh)

3.0%

5.0%

5.0%

12.5%

Group 4

Blemishes such as damaged or misshapen tubers

2.0%

NIL

5.0%

NIL

Group 5

Dirt or other extraneous matter

1.0%

NIL

NIL

NIL

Table 4

BASIC SEED POTATOES PRODUCED OUTSIDE THE UK

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 1

Wart Disease (Synchytriumendobioticum (Schilb.))

NIL

NIL

NIL

NIL

Potato Tuber Eelworm (Ditylenchus destructor Thorne)

NIL

NIL

NIL

NIL

Potato Cyst Nematode (Globadera species infesting potatoes)

NIL

NIL

NIL

NIL

Ring Rot (Clavibactermichiganensis (Smith) Davis etal. ssp..sepedonicus (Spieck & Kotth). Davis et al.)

NIL

NIL

NIL

NIL

Brown Rot (Ralstoniasolanacearum (Smith) Yabuuchi et al.)

NIL

NIL

NIL

NIL

Potato Tuber Moth (Phthorimaeaoperculella (Zeller))

NIL

NIL

NIL

NIL

Potato Spindle Tuber Viroid

NIL

NIL

NIL

NIL

Colorado Beetle (Leptinotarsadecemlineata (Say))

NIL

NIL

NIL

NIL

Group 2

Dry Rot (Fusarium species) and Wet Rot

0.5%

NIL

6.0%

NIL

Group 3

Common Scab (Streptomyces species)

5.0%

5.0%

6.0%

33.3%

Group 4

Blemishes such as damaged or misshapen tubers

3.0%

NIL

6.0%

NIL

Group 5

Dirt or other extraneous matter

2.0%

NIL

NIL

NIL