# Council Directive 93/85/EEC of 4 October 1993 on the control of potato ring rot, Division 9.4: FISH test

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

(a) Prepare a suspension of approximately 10 6 cells per ml in UPW.
(b) Apply the FISH procedure (section 5).
(c) A positive FISH test is achieved if the same reactions are achieved from the culture and the positive control.

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Source: https://www.legislation.gov.uk/eudr/1993/85/annex/I/division/9/division/9.4 (the official version)
Page: https://openlegislation.uk/eu-directive-1993-85/annex-I/division-9/division-9.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.