# Council Directive 93/85/EEC of 4 October 1993 on the control of potato ring rot, Division 5.3.4

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

There are several problems inherent to the specificity of the FISH test. Background populations of fluorescing cells with atypical morphology and cross reacting saprophytic bacteria with size and morphology similar to C. m. subsp. sepedonicus may occur, although much less frequent than in the IF test, in potato heel end core and stem segment pellets.

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Source: https://www.legislation.gov.uk/eudr/1993/85/annex/I/division/5/division/5.3/division/5.3.4 (the official version)
Page: https://openlegislation.uk/eu-directive-1993-85/annex-I/division-5/division-5.3/division-5.3.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.