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List Of Rhododendron Diseases ...
This article is a list of diseases of rhododendron (''Rhododendron'' spp.). Bacterial diseases Fungal diseases Nematodes, parasitic Viral diseases References {{reflist Common Names of Diseases, The American Phytopathological SocietyDiseases and pests of rhododendronsRhododendron Rhododendron Rhododendrons ''Rhododendron'' (; from Ancient Greek ''rhódon'' "rose" and ''déndron'' "tree") is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are nati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhododendron
''Rhododendron'' (; from Ancient Greek ''rhódon'' "rose" and ''déndron'' "tree") is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are native to eastern Asia and the Himalayan region, but smaller numbers occur elsewhere in Asia, and in North America, Europe and Australia. It is the national flower of Nepal, the state flower of Washington and West Virginia in the United States, the state flower of Nagaland in India, the provincial flower of Jiangxi in China and the state tree of Sikkim and Uttarakhand in India. Most species have brightly colored flowers which bloom from late winter through to early summer. Azaleas make up two subgenera of ''Rhododendron''. They are distinguished from "true" rhododendrons by having only five anthers per flower. Species Description ''Rhododendron'' is a genus of shrubs and small to (rarely) large trees, the smallest species growing to tall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seimatosporium Rhododendri
''Seimatosporium rhododendri'' is a plant pathogen. References External links USDA ARS Fungal Database Fungal plant pathogens and diseases Xylariales {{fungus-plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exobasidium Vaccinii
''Exobasidium vaccinii'', commonly known as “red leaf disease,” or “Azalea Gall,” is a biotrophic species of fungus that causes galls on ericaceous plant species, such as blueberry and azalea ('' Vaccinium'' and ''Rhododendron'' spp.). As a member of the Ustilagomycota, it is a basidiomycete closely related to smut fungi. Karl Wilhelm Gottlieb Leopold Fuckel first described the species in 1861 under the basionym ''Fusidium vaccinii,'' but in 1867 Mikhail Stepanovich Voronin (often cited as “Woronin”) later placed it in the genus ''Exobasidium''. The type specimen is from Germany, and it is held in the Swedish Museum of Natural History. Morphology In its pathogenic state, ''E. vacinnii'' causes discoloration and, depending on the host, may cause hypertrophy and hyperplasia on the leaves and meristem, often forming flower-like structures (i.e. “pseudoflowers”). It may also cause green spots on blueberry fruits, which are sometimes tinted red and have occasional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pestalotia Sydowiana
''Pestalotiopsis sydowiana'' is a plant pathogen infecting azaleas and rhododendron ''Rhododendron'' (; from Ancient Greek ''rhódon'' "rose" and ''déndron'' "tree") is a very large genus of about 1,024 species of woody plants in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are nat ...s. References External links USDA ARS Fungal Database Fungal plant pathogens and diseases Ornamental plant pathogens and diseases sydowiana {{Xylariales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colletotrichum Gloeosporioides
''Glomerella cingulata'' is a fungal plant pathogen, being the name of the sexual stage ( teleomorph) while the more commonly referred to asexual stage (anamorph) is called ''Colletotrichum gloeosporioides''. For most of this article the pathogen will be referred to as ''C. gloeosporioides.'' This pathogen is a significant problem worldwide, causing anthracnose and fruit rotting diseases on hundreds of economically important hosts. Hosts and symptoms ''C. gloeosporioides'' has an extremely broad host range, causing anthracnose disease on a variety of crops such as cereals and grasses, legumes, fruits, vegetables, perennial crops, and trees. It has been observed as infecting harvested durian of the species ''Durio graveolens''. Some studies suggest that ''C. gloeosporioides'' has sub-populations specific to each host.Nelson, C. Scot "Mango Anthracnose (''Colletotrichum gloeosporioides'')" University of Hawaii at Manoa cooperative extension service. Aug. 2008 The symptoms can var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glomerella Cingulata
''Glomerella cingulata'' is a fungal plant pathogen, being the name of the sexual stage (teleomorph) while the more commonly referred to asexual stage (anamorph) is called '' Colletotrichum gloeosporioides''. For most of this article the pathogen will be referred to as ''C. gloeosporioides.'' This pathogen is a significant problem worldwide, causing anthracnose and fruit rotting diseases on hundreds of economically important hosts. Hosts and symptoms ''C. gloeosporioides'' has an extremely broad host range, causing anthracnose disease on a variety of crops such as cereals and grasses, legumes, fruits, vegetables, perennial crops, and trees. It has been observed as infecting harvested durian of the species '' Durio graveolens''. Some studies suggest that ''C. gloeosporioides'' has sub-populations specific to each host.Nelson, C. Scot "Mango Anthracnose (''Colletotrichum gloeosporioides'')" University of Hawaii at Manoa cooperative extension service. Aug. 2008 The symptoms can va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exobasidium Burtii
''Exobasidium burtii'' is a species of fungus in the family Exobasidiaceae. It is a plant pathogen Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). Organisms that cause infectious disease include fungi, oomy .... References Fungal plant pathogens and diseases Ustilaginomycotina Fungi described in 1934 {{fungus-plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thanatephorus Cucumeris
''Rhizoctonia'' is a genus of fungi in the order Cantharellales. Species form thin, effused, corticioid basidiocarps (fruit bodies), but are most frequently found in their sterile, anamorphic state. ''Rhizoctonia'' species are saprotrophic, but some are also facultative plant pathogens, causing commercially important crop diseases. Some are also endomycorrhizal associates of orchids. The genus name was formerly used to accommodate many superficially similar, but unrelated fungi. Taxonomy History Anamorphs ''Rhizoctonia'' was introduced in 1815 by French mycologist Augustin Pyramus de Candolle for anamorphic plant pathogenic fungi that produce both hyphae and sclerotia. The name is derived from Ancient Greek, ῥίζα (''rhiza'', "root") + κτόνος (''ktonos'', "murder"), and de Candolle's original species, ''Rhizoctonia crocorum'' (teleomorph '' Helicobasidium purpureum''), is the causal agent of violet root rot of carrots and other root vegetables. Subsequent authors added ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizoctonia Solani
''Rhizoctonia solani'' is a species of fungus in the order Cantharellales. Basidiocarps (fruit bodies) are thin, effused, and web-like, but the fungus is more typically encountered in its anamorphic state, as hyphae and sclerotia. The name ''Rhizoctonia solani'' is currently applied to a complex of related species that await further research. In its wide sense, ''Rhizoctonia solani'' is a facultative plant pathogen with a wide host range and worldwide distribution. It causes various plant diseases such as root rot, damping off, and wire stem. It can also form mycorrhizal associations with orchids. Taxonomy In 1858, the German plant pathologist Julius Kühn observed and described a fungus on diseased potato tubers and named it ''Rhizoctonia solani'', the species epithet referring to '' Solanum tuberosum'' (potato). The disease caused was well known before the discovery and description of the fungus. In 1956, Dutch mycologist M.A. Donk published the new name ''Thanatephorus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pythium
''Pythium'' is a genus of parasitic oomycetes. They were formerly classified as fungi. Most species are plant parasites, but ''Pythium insidiosum'' is an important pathogen of animals, causing pythiosis. The feet of the fungus gnat are frequently a vector for their transmission. Morphology ;Hyphae: ''Pythium'' species, like others in the family Pythiaceae, are usually characterized by their production of coenocytic hyphae without septations. ;Oogonia: Generally contain a single oospore. ;Antheridia: Contain an elongated and club-shaped antheridium. Ecological importance ''Pythium''-induced root rot is a common crop disease. When the organism kills newly emerged or emerging seedlings, it is known as damping off, and is a very common problem in fields and greenhouses. Thus there is tremendous interest in genetic host resistance, but no crop has ever developed adequate resistance to ''Pythium''. This disease complex usually involves other pathogens such as '' Phytophthora' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cylindrocarpon Radicicola
''Nectria radicicola'' is a plant pathogen that is the causal agent of root rot. Substrates include ginseng Ginseng () is the root of plants in the genus '' Panax'', such as Korean ginseng ('' P. ginseng''), South China ginseng ('' P. notoginseng''), and American ginseng ('' P. quinquefolius''), typically characterized by the presence of ginsenosides a ... and ''Narcissus''. It is also implicated in the black foot disease of grapevine. References Bibliography * External links Fungal plant pathogens and diseases Food plant pathogens and diseases Grapevine trunk diseases radicicola Fungi described in 1963 {{fungus-fruit-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cylindrocarpon Destructans
''Nectria radicicola'' is a plant pathogen that is the causal agent of root rot. Substrates include ginseng Ginseng () is the root of plants in the genus '' Panax'', such as Korean ginseng ('' P. ginseng''), South China ginseng ('' P. notoginseng''), and American ginseng ('' P. quinquefolius''), typically characterized by the presence of ginsenosides a ... and ''Narcissus''. It is also implicated in the black foot disease of grapevine. References Bibliography * External links Fungal plant pathogens and diseases Food plant pathogens and diseases Grapevine trunk diseases radicicola Fungi described in 1963 {{fungus-fruit-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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