20 March 2015: CAUTION – Increasing risk of stripe (yellow) rust outbreaks North Africa to South Asia

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

ALERT – Dec 23, 2013: LOCALIZED STEM RUST EPIDEMIC IN SOUTHERN ETHIOPIA. EXTREME CAUTION AND VIGILANCE NEEDED IN EAST AFRICA AND MIDDLE EAST REGION

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

May 17, 2013: CAUTION – POTENTIALLY SERIOUS OUTBREAKS OF YELLOW (STRIPE) RUST IN CWANA REGION. VIGILANCE NEEDED IN EAST AFRICA

Conducive climatic conditions for rusts, especially yellow rust, are resulting in potentially serious outbreaks in the CWANA region. Cool and wet conditions have persisted in many countries from Turkey to Bhutan. Early yellow rust infections have been observed in several … Continue reading

Apr 14, 2013 – Science magazine: Global research to control stem rust disease saves wheat farmers losses worth US $1.12 billion per year

New press release published on the CIMMYT web site A study just published in Science by scientists from the University of Minnesota, CSIRO, the University of Sydney, the University of Queensland, and CIMMYT shows that research to control the wheat disease known … Continue reading

Bhutan Country Contacts

Name Position Institute Email Doe Doe Program Director National Plant Protection Centre, Thimpu, Bhutan ddoe_chimi@yahoo.com Namgay Om Pathologist National Plant Protection Centre, Thimpu, Bhutan Om.namgay@gmail.com Sonam Dorji Scientist National Plant Protection Centre, Thimpu, Bhutan dorjisonam2010@gmail.com Sangay Tshewang Sr. Research Officer … Continue reading

Ug99 (Race TTKSK)

Wheat stem rust (Puccinia graminis f. sp. tritici) is historically the most damaging disease of wheat. The disease has the capacity to turn a healthy looking crop, only weeks away from harvest, into nothing more than a tangle of black … Continue reading

Ug99 Effective Sr Genes

Effective / Ineffective stem rust Resistance Genes The following table summarizes the effective and ineffective stem rust resistance genes for races in the Ug99 lineage (based on Singh et al., 2006). TTKSK (Ug99) TTKSF TTKST (Ug99 + Sr24) TTTSK (Ug99 … Continue reading

Pathotype Tracker – Where is Ug99?

Status Summary: Ug99 Lineage – January 2019 Race TTKSK (Ug99) was the first known race of P. graminis f. sp. tritici with virulence to the stem rust resistance gene Sr31. It also possesses virulence to a wide range of resistance … Continue reading