Paragraph 2

grown in a unit officially approved for production of seed potatoes of the F2GB grade PBTC;

kept free, as far as practicable, from diseases and aphids by appropriate husbandry measures; and

the first generation of this stock.

deviations from variety and type – nil;

Blackleg (Pectobacterium spp.) – nil;

Potato Virus Y, Potato Virus A and Potato Leafroll Virus – nil;

total virus (including those mentioned in paragraph (c)) - nil;

Dickeya spp. – nil; F3...

virus in direct progeny – nil.

Candidatus Liberibacter solanacearum Liefting et al., [LIBEPS] – nil;

Candidatus Phytoplasma solani Quaglino et al., [PHYPSO] – nil; and

Potato spindle tuber viroid [PSTVD0] – nil.

Stock of seed potatoes of the F5GB grade PBTC or the equivalent grade produced in the immediately preceding growing season which was either—

a crop which has been approved in writing by the Scottish Ministers.

are grown by a person whose facilities, test methods, planting arrangements and procedure for keeping records in relation to production of seed potatoes are acceptable to the Scottish Ministers;

are grown in the year of application for certification on an agricultural unit on which are grown only—

must not exceed the fourth field generation of the particular stock.

deviations from variety and type – 0.01%;

Blackleg (Pectobacteriumspp.) – nil;

Potato Virus Y, Potato Virus A and Potato Leafroll Virus – nil,

total virus (including those mentioned in paragraph (c)) – 0.1%;

Dickeya spp. –nil; ...

virus in direct progeny – 0.5%.

Candidatus Liberibacter solanacearum Liefting et al., [LIBEPS] – nil;

Candidatus Phytoplasma solani Quaglino et al., [PHYPSO] – nil; and

Potato spindle tuber viroid [PSTVD0] – nil.

Stock of seed potatoes of the F9GB grade PBTC or PB or the equivalent grade produced in the immediately preceding growing season which was either—

a crop which has been approved in writing by the Scottish Ministers.

deviations from variety and type - 0.1%;

Blackleg (Pectobacteriumspp.) - 0.1%;

Potato Virus Y, Potato Virus A and Potato Leafroll Virus - 0.02%;

total virus (including those mentioned in paragraph (c)) - 0.2%;

Dickeya spp. –nil; F10...

virus in direct progeny – 1.0%.

Candidatus Liberibacter solanacearum Liefting et al., [LIBEPS] – nil;

Candidatus Phytoplasma solani Quaglino et al., [PHYPSO] – nil; and

Potato spindle tuber viroid [PSTVD0] – nil.

Stock of seed potatoes of the F12GB grade PBTC, PB or S or the equivalent grade produced in the immediately preceding growing season which was either—

a crop which has been approved in writing by the Scottish Ministers.

deviations from variety and type - 0.1%;

Blackleg (Pectobacteriumspp.) - 0.5%;

Potato Virus Y, Potato Virus A and Potato Leafroll Virus - 0.1%;

total virus (including those mentioned in paragraph (c)) - 0.5%;

Dickeya spp. – nil; ...

virus in direct progeny – 2.0%.

Candidatus Liberibacter solanacearum Liefting et al., [LIBEPS] – nil;

Candidatus Phytoplasma solani Quaglino et al., [PHYPSO] – nil; and

Potato spindle tuber viroid [PSTVD0] – nil.

Stock of seed potatoes of the F13GB grade PBTC, PB, S or SE or the equivalent grade produced in the immediately preceding growing season which was either—

a crop which has been approved in writing by the Scottish Ministers.

deviations from variety and type -0.1%;

Blackleg (Pectobacteriumspp.) - 1.0%;

Potato Virus Y, Potato Virus A and Potato Leafroll Virus - 0.4%;

total virus (including those mentioned in paragraph (c)) - 0.8%;

Dickeya spp.- nil; ...

virus in direct progeny - 4.0%.

Candidatus Liberibacter solanacearum Liefting et al., [LIBEPS] – nil;

Candidatus Phytoplasma solani Quaglino et al., [PHYPSO] – nil; and

Potato spindle tuber viroid [PSTVD0] – nil.