Plant biostimulants - Determination of Rhizobium spp.

This document provides the methodology for the enumeration and determination of Rhizobium sp., Mesorhizobium sp., Ensifer sp., or Bradyrhizobium sp. in plant biostimulant products in accordance with Regulation (EU) 2019/1009 of the European Parliament and of the Council [1].

Pflanzen-Biostimulanzien - Bestimmung von Rhizobium spp.

Dieses Dokument wurde entwickelt, um die Methodik für die Zählung und Bestimmung von Rhizobium sp., Mesorhizobium sp., Ensifer sp. oder Bradyrhizobium sp. in Pflanzen-Biostimulanzienprodukten in Übereinstimmung mit der Verordnung (EU) 2019/1009 des Europäischen Parlaments und des Rates [1] bereitzustellen.

Biostimulants des végétaux - Détermination de Rhizobium spp.

Le présent document fournit la méthodologie de dénombrement et de détermination de Rhizobium sp., Mésorhizobium sp., Ensifer sp. ou Bradyrhizobium sp. dans les produits biostimulants des végétaux conformément au Règlement (UE) 2019/1009 du Parlement européen et du Conseil [1].

Rastlinski biostimulanti - Ugotavljanje prisotnosti in števila Rhizobium spp.

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4599 - Dispatch of FV draft to CMC - Finalization for Vote
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Standards Content (Sample)

oSIST prEN 17718:2023
Rastlinski biostimulanti - Ugotavljanje prisotnosti in števila Rhizobium spp.
Plant biostimulants - Determination of Rhizobium spp.
Pflanzen-Biostimulanzien - Bestimmung von Rhizobium spp.
Biostimulants des végétaux - Détermination de Rhizobium spp.
Ta slovenski standard je istoveten z: prEN 17718
65.080 Gnojila Fertilizers
oSIST prEN 17718:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17718:2023

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oSIST prEN 17718:2023

prEN 17718


April 2023
ICS 65.080 Will supersede CEN/TS 17718:2022
English Version

Plant biostimulants - Determination of Rhizobium spp.
Biostimulants des végétaux - Détermination de Pflanzen-Biostimulanzien - Bestimmung von
Rhizobium spp. Rhizobium spp.
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 455.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.



CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17718:2023 E
worldwide for CEN national Members.

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oSIST prEN 17718:2023
prEN 17718:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Enumeration of Rhizobium spp., Mesorhizobium spp., Ensifer spp.,
Bradyrhizobium spp. . 8
4.1 General . 8
4.2 Sample preparation . 8
4.2.1 General . 8
4.2.2 Liquid - Water based formulations . 8
4.2.3 Liquid - Oil based, emulsifiable concentrate (EC) formulations . 8
4.2.4 Solid - Wettable powder (WP) formulations . 8
4.2.5 Solid - Water dispersible granules (WDG) formulations . 8
4.2.6 Solid - Pellets, granules, microgr

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