July 3, 2012: Eighth new Ug99 variant identified – Race TTKSF+ confirmed in South Africa and Zimbabwe

stem rust samples collected from Afrikaskop, Eastern Free State, South Africa in Dec. 2010 and Birchenough, Eastern Zimbabwe in Sept. 2010 have been confirmed to be a new variant in the Ug99 lineage. The confirmed findings have just been published … Continue reading

June 1, 2012: South Africa – Latest race analysis results. Race TTKSF continues to be the predominant stem rust race in South Africa

Analysis undertaken by the Small Grains Institute, Agricultural Research Council (ARC), South Africa indicated the continued predominance of stem rust race TTKSF in South Africa. Race TTKSF is one of the Ug99 lineage races, although it is avirulent on Sr31. … Continue reading

South Africa Country Contacts

Name Position Institute Email Zak Pretorius Professor University of the Free State, Bloemfontein, South Africa PretorZA@ufs.ac.za Tarekegn Terefe Senior Pathologist Agricultural Research Council-Small Grain Institute, South Africa terefet@arc.agric.za … Continue reading

South Africa Stem Rust Risk Maps

These maps were created using all years of survey data (2007-2011). They illustrate hot-spots of disease severity. The following two approaches were taken to create the maps: Map 1. Geo-statistical Hot-spots:The Getis-Ord Gi* statistic was calculated on the survey data … Continue reading

South Africa Rust Resistant Cultivars

[advanced_iframe securitykey=”da39a3ee5e6b4b0d3255bfef95601890afd80709″ src=”http://wheatatlas.org/rusttracker/resistantcultivars/ZAF” width=”600″ height=”450″]

South Africa Virulence Graph

The Virulence by Country tool, developed by the University of Aarhus Denmark, displays the frequency of virulence to specific combinations of Sr genes in analysed samples over time for a selected country. Selection of any Ug99 lineage race or specific … Continue reading

South Africa Pathotype Frequency Graph

This pathotype information tool, developed by the University of Aarhus Denmark, displays the frequency of Ug99 lineage pathotypes in analysed samples. Selection of any specific combination of country(s) or year(s) is possible. Any new data incorporated into the underlying database … Continue reading