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Ug99 is a lineage of wheat stem rust (Puccinia graminis f. sp. tritici), which is present in wheat fields in several countries in Africa and the Middle East and is predicted to spread rapidly through these regions and possibly further afield, potentially causing a wheat production disaster that would affect food security worldwide. [1]
The Borlaug Global Rust Initiative (BGRI - originally named the Global Rust Initiative) was founded in response to recommendations of a committee of international experts who met to consider a response to the threat the global food supply posed by the Ug99 strain of wheat rust.
The fungal ancestors of stem rust have infected grasses for millions of years and wheat crops for as long as they have been grown. [7] According to Jim Peterson, professor of wheat breeding and genetics at Oregon State University, "Stem rust destroyed more than 20% of U.S. wheat crops several times between 1917 and 1935, and losses reached 9% twice in the 1950s," with the last U.S. outbreak in ...
The introduction focuses too heavily on Ug99. It should certainly be mentioned in the introduction because it helps to establish the notability of stem rust. However the level of detail about this one lineage of stem rust is inappropriate (regardless of whether Ug99 has its own page or is a section in the stem rust page).
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Southern rust's distinguishing characteristic is that pustules form mostly on the upper leaf surface and spores are more orange in color. Southern rust spreads more quickly and has a higher economic impact when hot, humid weather conditions persist. Timely fungicide applications to control southern rust are more crucial than with common rust. [26]