b'ASSOCIATION NEWS Tetrazolium CommitteeEoin OConnor (Vice-Chair)www.seedtest.org/en/technical-committees/tetrazolium-committee.htmlA glimpse of the ISTA workshop on Tetrazolium Test in Different Crop Groups, held in Montevideo, Uruguay, August 2024THE PRINCIPAL AIM OF THE ISTAHighlights of the YearVolume 1. This includes working sheets for 16 TETRAZOLIUM COMMITTEE IS TO(January 2024 to present) new species along with significant textual and DEVELOP NEW TETRAZOLIUM TESTS The revision of the ISTA Handbook ongraphical revisions aimed at greater ease of use. to determine the viability of seeds for speciesTetrazolium Testing represented a majorThe preparation of the second edition of the not yet included in the International Rules forcollaborative undertaking on behalf of the entireWorking Sheets is an ongoing process, but it is Seed Testing (ISTA Rules) and to re-evaluateCommittee throughout the course of the year.hoped that both this and the ISTA Handbook on existing methods. Other activities includeAll members contributed their expertise in thisTetrazolium Testing, 3rd Edition, will be made providing workshops for theoretical and practicalprocess and the fruit of these labours, the 3rdavailable before the end of 2025.training in tetrazolium testing, and the creationEdition of the handbook, was presented at the of tetrazolium working sheets with detailed2025 ISTA Congress in Christchurch during theThe Committee has been engaged in three descriptions for testing and evaluation. TheTetrazolium Committee reporting session. method validation (MV) test plans. The first is Committee also responds to queries related torelated to Moringa oleifera Lam. There are eight tetrazolium testing, from both ISTA colleaguesAlso under preparation is the second edition oflaboratories involved in this validation process, and interested parties at large. the ISTA Working Sheets on Tetrazolium Testing,five ISTA accredited and three non-accredited. SEED TESTING INTERNATIONAL OCTOBER 2025 45'