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  2. Stem rust - Wikipedia

    en.wikipedia.org/wiki/Stem_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 ...

  3. Rust (fungus) - Wikipedia

    en.wikipedia.org/wiki/Rust_(fungus)

    Puccinia graminis is a macrocyclic heteroecious fungus that causes wheat stem rust disease. [citation needed] The sexual stage in this fungus occurs on the alternate host – barberry – and not wheat. The durable spore type produced on the alternate host allows the disease to persist in wheat even in more inhospitable environments.

  4. Wheat rust - Wikipedia

    en.wikipedia.org/wiki/Wheat_rust

    Wheat rusts include three types of Pucciniae: P. triticina , wheat leaf rust , leaf rust, wheat brown rust, or brown rust P. graminis , stem rust , wheat stem rust, barley stem rust, or black rust

  5. Wheat yellow rust - Wikipedia

    en.wikipedia.org/wiki/Wheat_yellow_rust

    Other cereal rust fungi have macrocyclic, heteroecious life cycles, involving five spore stages and two phylogenetically unrelated hosts. P. striiformis was thought to be microcyclic for centuries until 2009, when a team of scientists at the USDA-ARS Cereal Disease Lab led by Yue Jin confirmed that barberry (Berberis and Mahonia spp.) is an alternate host. [3]

  6. Ug99 - Wikipedia

    en.wikipedia.org/wiki/Ug99

    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]

  7. Stem rot - Wikipedia

    en.wikipedia.org/wiki/Stem_rot

    Stem rot can readily infect crops that are in their vegetative or flowering stages. The disease can survive up to five years in the soil. [1] Symptoms of stem rot includes staining of infected area, reduced crop yield and crop failure. The disease can be spread through the use of unfiltered water as well as unsterilized tools.

  8. Puccinia - Wikipedia

    en.wikipedia.org/wiki/Puccinia

    Puccinia is a genus of fungi.All species in this genus are obligate plant pathogens and are known as rusts. [1] The genus contains about 4000 species. [2]The genus name of Puccinia is in honour of Tommaso Puccini (died 1735), who was an Italian doctor and botanist who taught anatomy at Hospital of Santa Maria Nuova in Florence.

  9. Wheat leaf rust - Wikipedia

    en.wikipedia.org/wiki/Wheat_leaf_rust

    The Puccinia species causing wheat leaf rust has been called by at least six different names since 1882, when G. Winter (1882) described the Puccinia rubigo-vera. [5] During this time, wheat leaf rust was interpreted as a specialized form of P. rubigo-vera. Later, Eriksson and Henning (1894) classified the fungi as P. dispersa f.sp. tritici.

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