Interlaboratory Comparison Testing

Interlaboratory Comparison (ILC) tests are used to assess the performance of a laboratory or to validate a test method. 

ILC testing at GEVES

Interlaboratory Comparison (ILC) tests are used either to assess the performance of a laboratory or to validate a test method. These two types of ILC are known as Proficiency Testing and  Method Validation.

Proficiency testing is used to assess the competence of a laboratory. It is carried out in order to monitor approved laboratories, who also use ILCs to adjust their testing process at the beginning of the seed season. Proficiency tests are also requested by GNIS-SOC for laboratory approvals, and by the French Seed Association (UFS) as decided by the purity, germination and health quality commissions of the flower and vegetable sections.

Method validation testing is used to test a method in different laboratories with different operators. It plays a key role in the method development process, in particular for international research projects.

It is also possible to organise mini-comparisons with two or more participating laboratories, on the same basis as an ILC. The organisation of these mini-comparisons and the statistical processing of results is adapted to the smaller number of laboratories involved.

Proficiency testing, method validation, and mini-comparison ILCs can be organised by contacting the SNES.

At GEVES, ILCs are organised in accordance with the principles of the 17043 accreditation standard.  The competence of the teams involved with regard to the tests and species concerned is instrumental.

Regardless of the framework chosen by the ILC’s prescribing body (SOC, UFS or other), GEVES guarantees total anonymity and confidentiality. This is ensured by assigning a code identity to both participants and samples.

GEVES has developed an online platform that enables ILC participants to access documents and files online for each of their ILCs, and to acknowledge receipt of their samples.


Go to the ILC website



ILC Programme

Type of ILC
Species Test or pathogen
GEVES Contact
ILC Code
Delivery of samples
Results returned to participant Report available
Proficiency Melon Pathology: Acidovorax citrulli SNES 2018-GEVES-MELON-BA 2nd ssemester*
Proficiency Pois Pathology: Ascohyta pisi, M. pinodes, P.medicaginis SNES 2018-GEVES-POIS-MY 2nd ssemester*
Proficiency Lin Pathology: Botrytis cinerea, Colletotrichum lini, Alternaria linicola SNES 2018-GEVES-LIN-MY 1st semester*
Proficiency Blé Pathology: Tilletia spp. SNES 2018-GEVES-BLE-MY 2nd ssemester*
Proficiency Chou Pathology: Leptosphaeria maculans SNES 2018-GEVES-CHOU-MY 2nd ssemester*
Proficiency Oignon/Poireau
Allium cepa L. / Allium porum L.
Germination SNES 2018-UFS-ALLIUM-GE 03/05/2018 29/06/2018 27/07/2018
Proficiency Chou
Brassica oleracea L.
Germination SNES 2018-UFS-CHOU-GE 03/05/2018 15/06/2018 29/06/2018
Proficiency Persil

Petroselinum crispum (Mill.) Fuss

Germination SNES 2018-UFS-PERSIL-GE 03/05/2018 29/06/2018 06/07/2018
Proficiency Mâche

Valerianella locusta (L.) Laterr.

Thousand Seed Weight SNES 2018-UFS-MACHE-MMS 22/05/2018 29/06/2018 07/12/2018
Proficiency Aubergine

Solanum melongena L.

Thousand Seed Weight SNES 2018-UFS-AUBERGINE-MMS 04/06/2018 29/06/2018 07/12/2018
Proficiency Mâche

Valerianella locusta (L.) Laterr.

Dénombrement sur poids de pureté SNES 2018-UFS-MACHE-PS 04/06/2018 29/06/2018 07/12/2018
Proficiency Epinard

Spinacia oleracea L.

Dénombrement sur poids de pureté SNES 2018-UFS-EPINARD-PS 04/06/2018 29/06/2018 07/12/2018
Proficiency Navet

Brassica rapa L.

Dénombrement sur poids de pureté SNES 2018-UFS-NAVET-PS 04/06/2018 29/06/2018 07/12/2018
Proficiency Melon

Cucumis melon L.

Water Content SNES 2018-UFS-MELON-TE 04/06/2018 29/06/2018 07/12/2018
Proficiency Haricot

Phaseolus vulgaris L.

Water Content SNES 2018-UFS-HARICOT-TE 04/06/2018 29/06/2018 07/12/2018
Proficiency Tournesol

Helianthus annuus L.


(3 samples)

SNES 2018-SOC-TOURNESOL-GE 24/09/2018 02/11/2018 16/11/2018
Proficiency Pois

Pisum sativum L.


(3 )

SNES 2018-SOC-POIS-GE 8/10/2018 16/11/2018 30/11/2018
Proficiency Luzerne

Medicago sativa L.


(3 samples)

SNES 2018-SOC-LUZERNE-GE 15/10/2018 23/11/2018 07/12/2018
Proficiency Luzerne

Medicago sativa L.

Dénombrement sur poids de pureté

(2 samples)

SNES 2018-SOC-LUZERNE-DPP 15/10/2018 23/11/2018 07/12/2018
Proficiency Céréales Germination

(3 samples)

SNES 2018-CEREALES-GE 12/11/2018 21/12/2019 18/01/2019
Proficiency Soja

Glycine max (L.) Merr.



(3 samples)

SNES 2018-SOJA-GE 14/01/2019 08/02/2019 01/03/2019
Proficiency Ray Grass

Lolium perenne L.


(3 samples)

SNES 2018-RAYGRASS-GE 04/02/2019 12/04/2019 03/05/2019
Proficiency Ray Grass

Lolium perenne L.

Dénombrement sur poids de pureté

(2 samples)

SNES 2018-RAYGRASS-DPP 04/02/2019 22/03/2019 5/04/2019

*Depending on availability of seed lots


Participate in an ILC


ILC assistance

Have you participated in a proficiency testing ILC?

GEVES can assist you in reviewing the report and implementing the necessary corrective action (training, double reading, self-training with seed control kits or reference samples).


To sign up for an ILC*, to request the organisation of an ILC or mini-comparison, or for assistance following your participation in an ILC, please contact our ILC correspondents:

For seed quality ILC testing: SNES

Annie Saussaye


Tel: +33 (0)2 41 22 58 22

For ILC testing using biochemical and biomolecular techniques: BioGEVES

Patricia Lem


Tel: +33 (0)5 46 68 31 01


*Participation in ILC testing organised within the framework of laboratory approval is compulsory for approved laboratories for the species and tests in their scope of approval.  


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