Predominant Pathotype(s): TTKSF – considered a progenitor of Ug99, avirulent on Sr31. Combined virulence to Sr31 + Sr24 is present in South Africa (race PTKST). Effective Sr Genes:Sr13, 22, 25, 26, 29, 32, 33, 35, 36, 37, 39, 42, 43, … Continue reading
Search Results for: "South Africa"
The Country Survey Mapper tool, developed by the University of Aarhus Denmark, displays rust field survey data. Selection of any specific combination of year and disease is possible. Any new data incorporated into the underlying database will automatically be displayed … Continue reading
[advanced_iframe securitykey=”da39a3ee5e6b4b0d3255bfef95601890afd80709″ src=”http://wheatatlas.org/rusttracker/production/ZAF” width=”300″ height=”190″] Rust Issues: All 3 rusts are potential constraints. Stem rust historically was the major constraint. Yellow rust was first detected in 1996 – the result of a foreign incursion. Chemical control is undertaken. Ug99 Status: … 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
Favourable weather conditions for stripe rust are occurring across North Africa to South Asia. Cool, wet conditions across many parts of the region are producing a conducive environment for disease outbreaks. Aggressive races with virulence to Yr27 are known to … Continue reading
A severe, localised stem rust epidemic has broken out in southern Ethiopia during November-December 2013. The districts of Agarfa and Gasera in Bale zone are the most seriously affected, but some spread into other areas is now being reported. The … Continue reading
Following the localized stem rust epidemics in Ethiopia on the cultivar “Digalu” in 2013/14 (see report 23rd Dec 2013); continued, severe stem rust outbreaks have been observed in the 2014/15 main season. Once again the popular cultivar “Digalu” has been … Continue reading
Survey updates – East Africa Kenya: stem rust incidence and severity is very high in Kenya. Recent surveys (June 2010) by KARI,Njoro staff in the Narok region recorded stem rust in 80% of the 109 fields surveyed. Stem rust severity … Continue reading
Additional reports of wheat stem rust were received from several African countries. In August, wheat stem rust was reported to be widespread in Tanzania. Wheat growing areas in Northern provinces and the Southern highlands both reported the presence of wheat … Continue reading
East Africa: In Uganda, high incidence and severity of wheat stem rust have been reported in late August throughout the wheat growing regions. In Kenya, despite drought in many areas, wheat stem rust has been recorded throughout the wheat areas. … Continue reading