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
Tag Archives: UG99
Analysis undertaken by AAFC, Canada on samples collected by NARI, Eritrea in Oct. 2010 has confirmed the presence of Ug99 lineage races TTKST and PTKST in Eritrea. Wolday et al (2011) report the findings in the journal Plant Disease. Both … Continue reading
Yemen: Wheat rust surveys undertaken by AREA, Yemen in the key wheat growing areas of the country during October 2010 to March 2011 revealed stem rust to be widespread in the highlands and western areas, but absent in the eastern … Continue reading
Three variants in the Ug99 lineage have been confirmed in stem rust samples collected in Tanzania during August 2009 by a team of Tanzanian and international scientists. Races confirmed by the USDA-ARS Cereal Disease Laboratory, St. Paul, MN, USA were; … Continue reading
Confirmed results from race analysis completed in the 2009/10 season are now available. The confirmed spread of Ug99 variants carrying combined Sr31 + Sr24 virulence in Africa continues, along with the continued predominance of these variants in Kenya. The absence … Continue reading
A stem rust sample collected from near Greytown, KwaZulu-Natal, South Africa in Nov. 2009 has been confirmed to be Ug99 lineage race PTKST. Samples from another site – Cedara, KwaZulu-Natal, collected in Dec. 2009 showed similar virulence profiles. The confirmed … Continue reading
stem rust samples collected near Harare in Sept 2009 have been confirmed as race TTKSF, the presumed progenitor of Ug99. Analysis undertaken by the University of the Free State, South Africa and the USDA-ARS, Cereals Disease Lab, Minnesota, USA confirmed … Continue reading