# Council Directive 93/85/EEC of 4 October 1993 on the control of potato ring rot, Division 7.5

Extent: E+W+S+N.I.

As the positive controls, inoculate 5 plants with an aqueous suspension of 10 5 to 10 6 cells per ml of a known culture of C. m. subsp. sepedonicus and, where possible, with naturally infected tuber tissue (see section 4) by the same inoculation method (7.3 or 7.4).

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Source: https://www.legislation.gov.uk/eudr/1993/85/annex/I/division/7/division/7.5 (the official version)
Page: https://openlegislation.uk/eu-directive-1993-85/annex-I/division-7/division-7.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.