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Rust Report - Stem (Black) Rust

Regularly updated situation reports on cereal rusts based on information provided by a global network of rust workers. It is important to note that not all reports of stem rust relate to Ug99 or variants - other local races are also included.

Wheat Stem Rust Widespread in East Africa

20 Sep 2009

Wheat Stem Rust Widespread in 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. Unsprayed fields in the North Rift province surveyed in September had high severity of stem rust. The variety KS Mwamba was highly affected.  In both countries, there is no confirmation of races involved but presence of the Ug99 lineage is highly likely. Late rains in Ethiopia delayed planting, surveys will be undertaken in Oct. Southern Africa: Surveys were undertaken in Zambia in late August and Zimbabwe (7-11 Sept. 2009). In Zambia, no stem rust was observed in farmer fields during the survey. Intensive use of fungicides (up to 3 sprays) was reported for commercial farmers. Stem rust was however detected at one research station on 17th Sept. Race identity is currently unknown. In Zimbabwe, stem rust was recorded at 5 locations: Gwebi, Birchenough, Mutare, Nyanga and Harare. Races involved are currently unknown, but race analysis is underway. At Gwebi, this was the first report of stem rust since 2003. At Nyanga, high levels of stem rust infections were observed on small-holder plots.

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Rust SPORE is developed by FAO and partners as part of the Borlaug Global Rust Initiative (BGRI) to mitigate the threat of wheat rust diseases (stem rust, leaf rust and yellow rust).


The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations (FAO) concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.

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