单词 | rhizoctonia |
释义 | Rhizoctonian. A genus of imperfect fungi comprising plant pathogens which attack the roots or lower stem parts of various hosts, and are responsible for a number of important plant diseases including damping off of seedlings and potato stem canker; (also rhizoctonia) any of the fungi belonging to (or formerly included in) this genus. Frequently attributive.Many fungi originally described as species of Rhizoctonia have since been shown to be anamorphs of certain basidiomycetous genera; but even those whose teleomorph is now known are still often referred to as rhizoctonias. ΘΚΠ the world > plants > particular plants > fungi > [adjective] > of fungi groups or members Rhizoctonia1823 discomycetous1855 hymenomycetoid1857 pyrenomycetous1857 gasteromycetous1861 hymenomycetous1866 ascomycetous1867 coniomycetous1872 hymenomycetal1874 phycomycetous1883 hyphomycetous1887 zygomycetous1928 Zygomycetes1930 the world > plants > particular plants > fungi > [noun] > fungi groups or members aecidium1751 Lactarius1821 Armillaria1829 russula1835 hyphomycetes1836 Penicillium1836 discomycete1842 Ascomycetes1857 Pyrenomycetes1857 coniomycetes1866 phalloid1880 gasteromycete1885 hymenomycete1887 Zygomycetes1887 phycomycete1889 autobasidiomycete1895 Phomopsis1911 Rhizoctonia1916 1823 R. K. Greville Sc. Cryptogamic Flora I. §1 Persoon continued the genus [Sclerotium], but added to it, two other groups of minute plants, possessing no affinity with it, and which have since been described by Decandolle, under the names of Erysiphe and Rhizoctonia. 1835 G. T. Burnett Outl. Bot. I. 223 Probably their spores are conveyed, like those of the Rhizoctoniæ, by the water that drains through the soil. 1897 W. G. Smith tr. K. F. von Tubeuf Dis. Plants ii. i. 201 The spores open by a longitudinal slit, and a germ-tube emerging from each end branches into a mycelium which soon takes on the form of a rhizoctonia-strand. 1916 Bull. Illinois Agric. Exper. Station No. 189. 376 There are recognized in America two species of truly parasitic Rhizoctonias. 1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 506 Corticium solani causes the Rhizoctonia-disease (a root rot) of potatoes. 1999 BBC Gardeners' World Apr. 141/2 Damping off disease is invariably responsible for the sudden death of seedlings. There are various soil-borne fungi involved, including species of Pythium and Rhizoctonia, all of which are encouraged by over-wet compost. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1823 |
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