Abstract

This document specifies a method for the enumeration of enterococci in microbial and non-microbial plant biostimulants. Enterococci are part of the Enterococcaceae family. The entire Enterococcaceae family cannot be detected, and is not detected by this method. This document specifies a colony-count technique on a selective medium (Slanetz-Bartley agar) with confirmation on Bile Esculin Azide agar. This document is applicable to all formulations of microbial and non-microbial plant biostimulants in liquid or solid form. This document is not applicable to other fertilising products. This document is applicable to the blends of fertilizing products where a blend is a mix of at least two of the following component EU fertilizing products categories: Fertilizers, Liming Materials, Soil Improvers, Growing Media, Plant Biostimulants, and where the following category Plant Biostimulants is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If Plant Biostimulants is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a blend of fertilizing products is composed of components in equal quantity or in case the component EU fertilising products used for the blend have identical formulations , the user decides which standard to apply.

Begin

2022-03-10

WI

00455024

Planned document number

DIN EN 17720

Project number

05702227

Responsible national committee

NA 057-03-06 AA - Plant biostimulants  

Responsible european committee

CEN/TC 455/WG 3 - Pathogenic and non-pathogenic microorganisms  

draft standard

Plant biostimulants - Determination of Enterococcaceae; German and English version prEN 17720:2023
2023-05
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previous edition(s)

Plant biostimulants - Determination of Enterococcaceae; German version CEN/TS 17720:2022
2022-07

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