# The Seed Potatoes Regulations 1991, Part II: SPECIFIED DISEASES OR PESTS, DAMAGE AND DEFECTS AND TOLERANCES—VTSC CLASS PRODUCED IN GREAT BRITAIN


Column 1
Column 2
Column 3
Column 4
Specified diseases or pests, demage and defects
Individual tolerances
Group tolerances
Collective group tolerances
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) David et al. ssp. sepedonicus (Spieck. & Kotth.) Davis et al.)
NIL
—
—
Brown Rot (Pseudomonas solanacearum (E. F. Smith) Jensen)
NIL
—
—
Potato Tuber Moth (Phthorimaea operculella (Zwll.)
NIL
—
—
Potato Spincle Tuber Viroid
NIL
—
—
Colorado Beetle (Leptinotarsa decemlineata (Say))
NIL
—
—
GROUP II
Blight (Phylophthora infestans (Mont.) de Barry)
0.5%
1.0%
4.0%
Blackleg (Erwinia carotovora (Jones) Bergey et al. ssp atroseptica (Hellmers & Dowson) Dye)
NIL
1.0%
4.0%
Soft Rots including: Watery Wound rot (Pythium ultimum Trow)
0.5%
1.0%
4.0%
Pink Rot (Phytophthora erythroseptica Pethybridge) and Pit Rot
0.5%
1.0%
4.0%
Dry Rot (Fusarium species
0.5%
1.0%
4.0%
Gangrene (Phoma species)
0.5%
1.0%
4.0%
Frost damaged tubers
0.5%
1.0%
4.0%
GROUP III
Skin Spot (Polyscytalum pustulans (Owen & Wakefield) M. B. Ellis)
0.5%
3.0%
4.0%
GROUP IV
Black Scurf (Rhizoctonia solani Kuhn)
1.5%
3.0%
4.0%
Common Scab (Streptomyces species
3.0%
3.0%
4.0%
GROUP V
Powdery Scab (Spongospora subterranea (Wallr.) Lageth.)
1.5%
3.0%
4.0%
GROUP VI
External blemishes or tubers other than diseased tubers whose shape is atypical for the variety
2.0%
2.0%
4.0%
GROUP VII
Dirt or other extraneous matter
1.0%
1.0%
—

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Source: https://www.legislation.gov.uk/uksi/1991/2206/schedule/5/part/II (the official version)
Page: https://openlegislation.uk/seed-potatoes-regulations-1991/schedule-5/part-II
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.