Host response of some wheat cultivars to stem rust disease incited by puccinia graminis f. sp. tritici under sulaimani conditions

الملخص EN

Wheat stem rust caused by the fungus (Puccinia graminis f.

sp.

tritici) is historically the most damaging disease of wheat (Triticum aestivum).

In the worst cases, yield losses of 70% or more are possible.

It was at one time the most feared disease of the wheat crop.

In the present study, twentytwo wheat genotype (14 Bread Wheat, 6 Durum Wheat, and 2 Triticale cultivars) were tested to investigate the host reaction between the cultivars with the pathogen population of P.

graminis f.sp tritici under natural inoculation conditions.

Based on the results of disease severity and coefficient of infection, the high resistance reaction was found in bread wheat cultivars Maaroof and Charmo, and Triticale wheat cultivars Rezan and Sarah, while bread wheat cultivars Adana and SaberBeg and durum wheat cultivars Cimmito and Acsad explored high resistance against the pathogen population of P.

graminis f.sp tritici, at adult plant stage in the field.