International non-profit organization
The International Seed Testing Association (ISTA) is an independent, non-profit organization founded during the 4th International Seed Testing Congress in 1924. Its members work to promote uniform methods of evaluating seeds being sold internationally to facilitate the international trading of seeds and to contribute to global food security. ISTA is involved in the development of internationally approved ISTA Rules for sampling and testing seed quality, laboratory accreditation and the promotion of seed science research and test development.
Membership.
ISTA’s membership currently consists of 207 member laboratories, 43 personal members and 56 associate members, from 76 countries/distinct economies worldwide (as of 2013). 127 of the ISTA Member Laboratories are accredited by ISTA and entitled to issue ISTA International Analysis Certificates.
Membership is open to anyone involved or interested in seed testing.
Technical Committees.
The principle objective of ISTA Technical Committees (TCOM) is to develop, standardise and validate methods for sampling and testing of seed quality, using the best scientific methods available. These tasks are subject-focused in the Technical Committees. The committees are made up of up to 15 seed scientists and technical specialists from different fields of research. The committee members may be based in seed testing laboratories, universities, research institutes or companies from all over the world. 
Members of each TCOM work together, to develop and enhance the ISTA International Rules for Seed Testing. They carry out research to develop new or modified test methods, complete comparative studies and surveys and oversee validation of test methods. On the basis of their work,  the TCOMs can propose changes to the ISTA Rules for Seed Testing. TCOMs are also responsible for organisation of seminars which provide a platform for presentation of new work in the subject area, and workshops, which provide training in test methods and opportunities for exchange of information, experience and ideas. Many TCOMs also produce Handbooks that supplement their Chapters in the ISTA Rules.
Management.
All changes to the ISTA Constitution and to the International Rules for Seed Testing are decided by, and voted for during, the ISTA Ordinary Meeting, which is held annually.
The voting rights of the Association are held by governments/distinct economies as recognised by international fora. The Designated Authority in each country/distinct economy appoints a Designated Member to execute its voting right at an ISTA Ordinary Meeting. A Designated Member is a Personal Member of the Association. There can be several Designated Members in a country/distinct economy, but only one Designated Member (by specific appointment of the corresponding Designated Authority) can execute the voting right on behalf of its Government at an ISTA Ordinary Meeting. The proposals for changes to the ISTA Rules or ISTA Constitution can be put forward by the Executive Committee, Technical Committees or any ISTA Member.
International Rules for Seed Testing (ISTA Rules).
The ISTA Rules are the key element of ISTA’s vision to achieve uniformity on seed testing and include testing methods for seeds designated for crop or plant production. All published methods have undergone validation studies to ensure that test procedures give reliable and repeatable results. Following agreement between ISTA’s member countries, the validated methods are included in the ISTA Rules. The ISTA Rules are approved and amended at the ISTA Ordinary Meetings, on the basis of advice from the ISTA Technical Committees. The procedures for validation of test methods are given in the ISTA Method Validation Programme.
The ISTA Rules include 19 chapters describing principles and definitions in detail. They cover numerous agricultural crops, flower, tree, shrub, medicinal and herbage species from throughout the world. They also provide standard methods for sampling of seed lots so that there is a direct connection between the seed lots from which the sample was drawn and the results of quality test conducted on that seed lot.
All the requirements of the ISTA Rules must be followed when test results are to be reported on an ISTA Seed Lot Certificate.
ISTA Seed Lot Certificates.
The International Seed Analysis Certificates can only be issued by accredited member laboratories of ISTA following testing or sampling in accordance with up-to-date ISTA Rules. When seed test results are reported on ISTA International Seed Lot Certificate, the issuing laboratory guarantees that the sampling and testing have been carried out in a manner conforming with ISTA Rules i.e. using methods that have been validated, internationally harmonised and voted on by the ISTA membership.
ISTA Method Validation Programme.
The organization's method validation programme is meant to lay out a system allowing the validation of recently developed test methods, the comparison of equivalent test methods and the evaluation of existing methods for the evaluation of seed quality.
The process of method validation ensures that a method is fit for purpose, that the description of a method is concise and complete, and that the procedure gives accurate and repeatable results in accordance with the given specifications of the test method. It also, where appropriate, confirms the relationship between the results of a quality test and a practical expression of seed quality.
Laboratory Accreditation.
The goal of ISTA Accreditation is to confirm that a laboratory is capable of carrying out seed testing procedures in accordance with the ISTA Rules. Accredited laboratories must prove that they run a quality assurance system up to par with the ISTA accreditation standards. Accredited laboratories are permitted to issue ISTA International Seed Lot Certificates.
Only ISTA Member Laboratories can be accredited. Prior to accreditation, laboratories have to demonstrate their ability to carry out seed testing in accordance with ISTA Rules by participating in the Proficiency Test Programme. The process of Accreditation involves verification of a laboratory's technical competence by an audit team against established audit criteria. Criteria are formulated in the ISTA Accreditation Standard. Accredited laboratories are re-audited at regular intervals.
Testing of seeds by an accredited laboratory indicates that seeds have been tested by internationally accepted methods. In certain countries, the import of seed is only authorized if the seed lot is accompanied by an ISTA Certificate. Accredited laboratories are obliged to participate in relevant proficiency test rounds. Failure in the proficiency test programme may lead to suspension of the accreditation.
ISTA Accreditation standard for seed testing and seed sampling.
The ISTA Laboratory Accreditation Standard is based on international accreditation standards for testing and calibration laboratories ISO/IEC 17025.
ISTA proficiency tests.
The goal of the ISTA Proficiency Test Programme is:"to identify those laboratories that do not meet the minimum standard of performance that is reasonably expected from an ISTA accredited laboratory and to determine if such laboratories are taking reasonable corrective action to bring their performance standard to at least the minimal level."Any ISTA member laboratory is eligible to take part in the programme, with participation being mandatory for any ISTA accredited member laboratory and optional for non-accredited laboratories seeking to benchmark themselves with accredited ones and prepare for future accreditation. Non-members may take part a flat fee determined by the association.
Seed Science and ISTA.
ISTA promotes seed science though publication of Seed Science and Technology, the work of the Technical Committees, in its triennial Seed Symposium and the work of the Seed Science Advisory Group.
The ISTA Seed Symposium is held as part of the triennial ISTA Congress and provides a forum for the interaction of applied seed scientists and technical experts. Five sessions, held over three days, include both oral and poster papers on a wide range of topics related to seed science and technology.
International Cooperation.
As a worldwide association, ISTA works with many regional and international organizations such as:
References.
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