Detection of wheat stem rust (Puccinia graminis f. sp. tritici) race TTKSK (Ug99) in Iran.
In 2007, new reports of stem rust caused by Puccinia graminis f.sp. tritici [P. tritici] in Lorestan and Hamadan provinces of Iran were considered unusual because stem rust had not been recorded previously in the Hamadan area where winter habit wheat cultivars are grown. Detailed investigations in these areas showed significant levels of stem rust in experimental plots and occasionally in farmers' fields, some that showed moderate to high levels of infection. Race analysis of four stem rust samples collected from Borujerd, Hamadan and Poldokhtar (southwest) and Kelardasht (north) in 2007 was conducted. Races TTKSK, TRSFC, TTJQC and RRHSC were identified. TTKSK poses a serious threat to wheat production in Iran.