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rust
rust in botany, name for various parasitic fungi of the order Uredinales and for the diseases of plants that they cause. Rusts form reddish patches of spores on the host plant. About 7,000 species are known. Some grow entirely on one plant; others require two hosts, plants of two species, in order to complete their life cycles. Cedar rust, for instance, grows on cedar and on apple trees, needing both for development. Blister rust of pine grows on pines and either currant or gooseberry bushes. Black stem rust Puccinia graminis is one of the most destructive to wheat, rye, and other grasses; barberry is an alternate host. Rusts attack all cereal crops and many fruits, vegetables, forage crops, ornamental plants, and forest trees. Rusts are hard to eradicate; control measures include the use of rust-resistant varieties of seed and the elimination of alternate hosts in agricultural areas. Rusts are classified in the kingdom Fungi , phylum (division) Basidiomycota, order Uredinales. |
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"rust." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "rust." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1E1-rust.html "rust." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-rust.html |
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rust
rust / rəst/ • n. 1. a reddish- or yellowish-brown flaky coating of iron oxide that is formed on iron or steel by oxidation, esp. in the presence of moisture. ∎ fig. a state of deterioration or disrepair resulting from neglect or lack of use: they are here to scrape the rust off the derelict machinery of government. 2. a disease of plants that results in reddish or brownish patches, caused by a fungus (Puccinia and other genera, order Uredinales, class Teliomycetes). 3. a reddish-brown color: [in comb.] his rust-colored hair. • v. [intr.] be affected with rust: the blades had rusted away | [as adj.] (rusting) rusting machinery. ∎ fig. deteriorate through neglect or lack of use. DERIVATIVES: rust·less adj. |
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"rust." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "rust." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O999-rust.html "rust." The Oxford Pocket Dictionary of Current English. 2009. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-rust.html |
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rust
rust Corrosion of iron or its alloys by a combination of air and water. Carbon dioxide from the air dissolves in water to form an acid solution that attacks the iron to form iron (II) oxide. This is then oxidized by oxygen in the air to reddish-brown iron (III) oxide. Rusting may be prevented by galvanizing.
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"rust." World Encyclopedia. 2005. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "rust." World Encyclopedia. 2005. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O142-rust1.html "rust." World Encyclopedia. 2005. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-rust1.html |
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rust
rust A plant disease caused by a fungus of the class Urediniomycetes. The characteristic symptom is the development of spots or pustules bearing masses of powdery spores which are usually rust-coloured, yellow, or brown. Infected plants may also show distortions or gall-like swellings. Compare white rust.
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MICHAEL ALLABY. "rust." A Dictionary of Ecology. 2004. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "rust." A Dictionary of Ecology. 2004. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O14-rust.html MICHAEL ALLABY. "rust." A Dictionary of Ecology. 2004. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-rust.html |
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rust
rust A plant disease caused by a fungus of the class Urediniomycetes. The characteristic symptom is the development of spots or pustules bearing masses of powdery spores which are usually rust-coloured, yellow, or brown. Infected plants may also show distortions or gall-like swellings. Compare WHITE RUST.
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MICHAEL ALLABY. "rust." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "rust." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O7-rust.html MICHAEL ALLABY. "rust." A Dictionary of Plant Sciences. 1998. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-rust.html |
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rust
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Cite this article
"rust." World Encyclopedia. 2005. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "rust." World Encyclopedia. 2005. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O142-rust.html "rust." World Encyclopedia. 2005. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-rust.html |
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rust
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T. F. HOAD. "rust." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "rust." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O27-rust.html T. F. HOAD. "rust." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-rust.html |
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rust
rust •adjust, august, bust, combust, crust, dust, encrust, entrust, gust, just, lust, mistrust, must, robust, rust, thrust, trust, undiscussed
•stardust • sawdust • angel dust
•bloodlust • wanderlust • upthrust
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"rust." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "rust." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O233-rust.html "rust." Oxford Dictionary of Rhymes. 2007. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-rust.html |
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