New Method Now Available - Corn Salad March 2017: Lcb 10.1 Acidovorax valerianellae - corn salad, ISTA Method 7-030: ver 1.1 (2017)= New method has been approved as a Standard (Class A).​ 

Numbering Changes to NSHS Method Codes January 2017: Numbered codes for NSHS-approved methods were initially established in 2001. As the method list has grown, it has become evident that some inconsistencies developed. In order to resolve these inconsistencies, codes for [...]

Revisions to NSHS Methods January 2017: Several NSHS-approved methods are linked to official methods of ISTA, the International Seed Testing Association. As of Jan 1, 2017, ISTA published revisions to several methods that are NSHS-approved. These are minor revisions, and [...]

Suspension of Potato Spindle Tuber Viroid method October 2016: The use of NSHS Method So 6.1, Potato Spindle Tuber Viroid – tomato, has been suspended and the method has been removed from the approved NSHS list. Effective October 14, 2016, [...]

Field Inspection Procedure September 2016: Editorial updates have been made to the protocol for field inspections.  Changes were made to clarify the diagnosis of diseases found during inspections. Additionally, there must be an agreement in writing with any 3rd party [...]

Corn and Soybean ELISA protocols September 2016: Recently changes were made to NSHS protocols for corn and soybean ELISA methods.  Previously, these methods listed only one antibody vendor.  Changes have been made to specify that antibodies from other vendors, that [...]

NSHS Administration Unit Personnel Changes July 2016: We are excited to welcome Dr. Charlie Block to the NSHS team at ISU! The ISU Seed Science Center serves as the Administration Unit for NSHS, acting as liaison with accredited companies and [...]

 New Method Description Published June 2016: Cb 1.5 Acidovorax avenae ssp citrulli – Cucurbits = Complete method description has been published.

Three New/Updated Methods Now Available April 2016: Pe 4.1 Pseudomonas syringae pv pisi – Peas = New method has been approved as a Standard (Class A). Cb 6.1 Fusarium oxysporum fsp niveum – watermelon = New method has been approved as a [...]

Several Seed Health Methods Updated February 2016: Rb 2.1 Alternaria dauci – Carrot = Replacement and/or addition of photographs Cb 5.1 Squash Mosaic Virus – Cucurbit = Addition of grow-out assay for confirmation of results Lcb 7.1 Pseudomonas syringae pv coriandricola – coriander = Complete [...]