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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 ...
Wheat leaf rust (Puccinia triticina) is a fungal disease that affects wheat, barley, rye stems, leaves and grains. In temperate zones it is destructive on winter wheat because the pathogen overwinters .
Puccinia schedonnardii is a basidiomycete fungus that affects cotton. [1] More commonly known as a “rust,” this pathogen typically affects cotton leaves, which can decrease the quality of the boll at time of harvest.
Norman Borlaug wrestling at the University of Minnesota. Borlaug was the great-grandchild of Norwegian immigrants to the United States. [18] Ole Olson Dybevig and Solveig Thomasdatter Rinde, of Feios, a small village in Vik kommune, Sogn og Fjordane, Norway, emigrated to Dane County, Wisconsin, in 1854.
Puccinia thaliae is the causal agent of canna rust, a fungal disease of Canna. Symptoms include yellow to tan spots on the plant's leaves and stems. Initial disease symptoms will result in scattered sori (clustered sporangia), eventually covering the entirety of the leaf with coalescing postulates.
Nina Farrer (1848–1929). Farrer was born on 3 April 1845 in the town of Docker, Westmorland in the English north west (now Cumbria).The son of Thomas Farrer, a tenant farmer, and his wife Sarah William, William Farrer was selected for a scholarship at Christ's Hospital, London where he was awarded a gold and silver medal for mathematics and soon earned a scholarship to Pembroke College where ...
Rust fungi grow intracellularly, and make spore-producing fruiting bodies within or, more often, on the surfaces of affected plant parts. [3] Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts.
S795 (Selection-795) is a coffee cultivar important for being one of the first strains of C. arabica found to be resistant to coffee leaf rust (CLR). [1]It is a selection of the Balehonnur Coffee Research Station in India, and it was generated by R.L. Narasimhaswamy by cross-breeding C. arabica and C. liberica known as S288 and the Kent variety, [2] a hybrid of Typica and an unknown other type ...