Participants of test round PT 23-3 shall receive samples of Trifolium hybridum for purity, other seed determination, germination and thousand seed weight testing, as part of the ISTA Proficiency Test Programme for 2023-2025.
In case there is any doubt as to the integrity of the samples (e.g. broken seal, inadequate quantity of seeds) the laboratory is requested to contact the ISTA Secretariat.
Please test samples and report the results in accordance with the current ISTA Rules.
Accredited laboratories are required to participate in all tests they hold a valid accreditation for. For non-accredited tests participation is voluntary.
Please note that the sample weight of the test round is based on the weight of 2500 seeds and it can differ from the weight prescribed in the Table 2C.
Other seed determination
The number and species names of other seeds found shall be reported in alphabetical order in accordance with the accepted names in the current ISTA List of Stabilised Plant Names (synonyms cannot be accepted).
Seed storage and submitting results
Remaining seed shall be carefully stored, under the responsibility of your laboratory, for re-testing or follow-up corrective actions if required. There should be sufficient seed for one re-test. It is also forbidden to sow the seeds, outside your laboratory, in the fields.
You are kindly asked to initiate the tests immediately after receipt of the samples, and report the results by e-mail to email@example.com.
Deadline for reporting results: 1 March 2024