Timeline
1993:
There is some evidence that race TTKSK may have been present in Kenya.
1998:
Severe stem rust infections observed in Uganda. Ug99 identified, characterised as having virulence on Sr31 and named.
2000:
TTKSF detected in South Africa.
2001:
TTKSK detected in Kenya.
2003:
TTKSK detected in Ethiopia.
2006:
TTKSK detected in Sudan and Yemen.
TTKST, a new variant of Ug99 with virulence to Sr24, detected in Kenya.
2007:
TTTSK detected in Kenya.
TTKSP detected in South Africa.
PTKSK detected in Ethiopia.
PTKST detected in Ethiopia.
2008:
FAO announced the presence of Ug99 in Iran.
PTKST detected in Kenya.
2009:
TTKSK detected in Tanzania.
TTKST detected in Tanzania.
TTTSK detected in Tanzania.
TTKSF detected in Zimbabwe.
PTKSK detected in Kenya.
PTKST detected in South Africa.
2010:
TTKST detected in Eritrea.
PTKST detected in Eritrea.
PTKST detected in Mozambique.
PTKST detected in Zimbabwe.
TTKSF+ detected in South Africa.
TTKSF+ detected in Zimbabwe.
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