# Council Directive 98/57/EC of 20 July 1998 on the control of Ralstonia solanacearum (Smith) Yabuuchi et al., Division: Interpretation of selective plating test results

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

The selective plating test is negative if no bacterial colonies are observed after six days or if no presumptive colonies typical of R. solanacearum are found, provided that no inhibition is suspected due to competition or antagonism by other bacteria and that typical R. solanacearum colonies are found in the positive controls.
The selective plating test is positive if presumptive R. solanacearum colonies are isolated.

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Source: https://www.legislation.gov.uk/eudr/1998/57/annex/II/section/VI/division/A/division/4/division/4.1/division/7 (the official version)
Page: https://openlegislation.uk/eu-directive-1998-57/annex-II/section-VI/division-A/division-4/division-4.1/division-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.