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Purity and OSD
- Original working sample weight and/or total weight of components is not reported;
- The sum of the weights of all the components does not correspond to the total weight of the components reported due to calculation or typing error;
- The weighing, calculation and expression of results is not in accordance with the ISTA Rules;
- Name and/or number of seeds of other species found are not reported;
- Mixing up the reporting of components between the three lots, e.g. reporting the weight of other seeds for Lot 1 in the Lot 2 position on the report form;
- Botanical names are misspelled or do not follow the nomenclature of the ISTA List of Stabilized Plant Names;
Germination
- The sum of the percentage of all categories (normal seedlings, abnormal seedlings, etc.) reported is not 100 % per replicate (calculating or reporting error);
- The specifications under "Preferred ISTA Method Used" are not reported;
- The range for the 100 seed replicates exceeds the maximum tolerated range and no re-test is initiated;
- Unexpected occurrence of fresh seeds and/or hard seeds reported in the species;
- No indication that a viability test was carried out as required by the ISTA Rules when 5 % or more fresh seeds are reported;
- Mixing up the reporting of components between the three lots, e.g. reporting the abnormals for Lot 1 in the Lot 2 position;
Moisture
- Mean results are reported to two decimal places instead of one;
- The test results of the two replicates exceed the range of 0.2 % difference and no re-test has been initiated;
- The results of the replicates are not reported;
- Mean results are not reported;
Tetrazolium
- Reporting of the mean not to the nearest whole number;
- The range for the 100 seed replicates exceeds the maximum tolerated range and no re-test is initiated;
- The specifications regarding the method used are missing.
Last update: 05.11.2007
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New issue of
SEED TESTING INTERNATIONAL (ISTA News Bulletin) No. 143 April 2012
More info »
REGISTRATION DEADLINE: MAY 15
ISTA Annual Meeting 2012
June 11-14, 2012
Venlo, The Netherlands
More info »
Reports available from the ISTA Annual Meeting 2011
held June 13-16, 2011
Zurich, Switzerland
More info »
ISTA / ISF Experiment on Herbage Seed Lot Size
Technical Protocol and participating companies
More info »
Outcome on the
World food security: urgent measures on seed needed
Second World Seed Conference 2009
held September 8-10,
in Rome, Italy
More info »
ISTA Seed Mixture Experiment
to collect information that may be used to determine the reliability of seed mixture test results and establish tolerances.
More info »
Universal List of Species
ISTA list of 130 plant species that accredited laboratories may wish to include in their seed collections
More info »
Position Paper on
ISTA's view regarding the units for the reporting of quantitative results on presence of seeds with specified traits in conventional seed lots
More info »
Accreditation Documents for the Testing of Specified Traits
Related Documents for download
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ISTA's Memorandum of Understanding with FAO
Read the full Press Release
More info »
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