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 EIL code Delivery of samples Results returned to participants Report available
Proficiency Cabbage Pathology : Leptosphaeria spp. SNES 2019-GEVES-CHOU-MY 11/03/2019 15/04/2019 30/06/2019
Proficiency Melon Pathology : Acidovorax citrulli SNES 2019-GEVES-MELON-BA 18/02/2019 15/04/2019 31/07/2019
Proficiency Flax Pathology : Alternaria linicola, Botrytis cinerea, Colletotrichum lini SNES/ISTA 2019-ISTA-LIN-MY 24/06/2019 02/08/2019 8/02/2020
Proficiency Pea Pathology : Ascohyta pisi, M. pinodes, P.medicaginis SNES 2019-GEVES-POIS-MY 2nd semester*
Proficiency Wheat Pathology : Tilletia spp. SNES 2019-GEVES-BLE-MY 2nd semester*
Proficiency Carrot

Daucus carota L.

Germination SNES 2019-UFS-CAROTTE-GE 09/09/2019 11/10/2019 25/10/2019
Proficiency Pepper

Capsicum annuum L.

Germination SNES 2019-UFS-PIMENT-POIVRON-GE 16/09/2019 25/10/2019 15/11/2019
Proficiency Cucurbitaceae (Watermelon, Zucchini, Cucumber)

Cucurbita spp.

Germination SNES 2019-UFS-CUCURBITACEE-GE 16/09/2019 18/10/2019 08/11/2019
Proficiency Chicory

Cichorium intybus L.

Determination of others seeds by number on a purity weight SNES 2019-UFS-CHICOREE-DPP 14/10/2019 08/11/2019 06/12/2019
Proficiency Celery

Apium graveolens L.

Determination of others seeds by number on a purity weight SNES 2019-UFS-CELERI-DPP 14/10/2019 08/11/2019 06/12/2019
Proficiency Leek

Allium porrum L.

Determination of others seeds by number on a purity weight SNES 2019-UFS-POIREAU-DPP 14/10/2019 08/11/2019 06/12/2019
Proficiency Zucchini

Cucurbita pepo L.

Moisture content SNES 2019-UFS-COURGETTE-TE 23/09/2019 18/10/2019 15/11/2019
Proficiency Cabbage

Brassica oleracea L.

Moisture content SNES 2019-UFS-Chou-TE 23/09/2019 18/10/2019 15/11/2019
Proficiency Oinion

Allium cepa L.

Moisture content SNES 2019-UFS-OIGNON-TE 23/09/2019 18/10/2019 15/11/2019
Proficiency Celery

Apium graveolens L.

Moisture content SNES 2019-UFS-CELERI-TE 23/09/2019 18/10/2019 15/12/2019
Proficiency Pea

Pisum sativum L.


(3 samples)

SNES 2019-SOC-POIS-GE 12/11/2019 13/12/2019 10/01/2020
Proficiency Soya

Glycine max (L.) Merr.


(3 samples)

SNES 2020-SOC-SOJA-GE 13/01/2020 28/02/2020 13/03/2020
Proficiency Dactyl

Dactylis glomerata L.


(3 samples)

SNES 2020-SOC-DACTYLE-GE 27/01/2020 13/03/2020 27/03/2020
Proficiency Dactyl

Dactylis glomerata L.


(3 samples)

SNES 2020-SOC-DACTYLE-PU 27/01/2020 13/03/2020 27/03/2020
Proficiency Rapeseed

Brassica napus L.

Determination of others seeds by number on a purity weight (2 échantillons) SNES 2020-SOC-COLZA-DPP 09/03/2020 03/04/2020 17/04/2020

*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-testing 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.  


In view of the French government's lockdown measures relating to COVID-19, GEVES’s activities have been significantly altered and our staff are working from home wherever possible. GEVES is currently maintaining its official missions which cannot be deferred.

In order for us to meet your demand as efficiently as possible, please contact us by email rather than postal mail.

If you have any questions, please get in touch with your usual GEVES contact by email or send a message to

We hope you can get through this time as calmly as possibly. Stay healthy, and stay in touch.