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List Of African Violet Diseases ...
This article is a list of diseases of African violets (''Saintpaulia ionantha''). Bacterial diseases Fungal diseases Fulginacillis Follicle Growth Sistementaris Gland Viral diseases Nematodes, parasitic Miscellaneous diseases and disorders {, class="wikitable" style="clear:left" ! colspan=2, Miscellaneous diseases and disorders , - , - , Marginal leaf burn , , Overfertilization , - , Ring spot , , Irrigation water temperature much above or below leaf temperature applied to the leaf surface , - ReferencesCommon Names of Diseases, The American Phytopathological Society African violet ''Streptocarpus'' sect. ''Saintpaulia'' is a section within '' Streptocarpus'' subgenus ''Streptocarpella'' consisting of about ten species of herbaceous perennial flowering plants in the family Gesneriaceae, native to Tanzania and adjacent so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Violet
''Streptocarpus'' sect. ''Saintpaulia'' is a section within '' Streptocarpus'' subgenus ''Streptocarpella'' consisting of about ten species of herbaceous perennial flowering plants in the family Gesneriaceae, native to Tanzania and adjacent southeastern Kenya in eastern tropical Africa. The section was previously treated as a separate genus, ''Saintpaulia'', but molecular phylogenetic studies showed that it was nested within the genus ''Streptocarpus''. Species and cultivars are commonly called African violets (although they are not closely related to true violets) or saintpaulias. They are commonly sold as house plants. Several of the species and subspecies of the section are endangered, and many more are threatened, as their native cloud forest habitats are cleared for agriculture. The conservation status of '' Streptocarpus ionanthus'' has been classed as near-threatened. Description Saintpaulias, which grow from 6-15 cm tall, can be anywhere from 6-30 cm wide. The l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anemone Mosaic Virus
''Anemone'' () is a genus of flowering plants in the buttercup family Ranunculaceae. Plants of the genus are commonly called windflowers. They are native to the temperate and subtropical regions of all continents except Australia, New Zealand and Antarctica. The genus is closely related to several other genera including ''Anemonoides'', ''Anemonastrum'', ''Hepatica'', and ''Pulsatilla''. Some botanists include these genera within ''Anemone''. Description ''Anemone'' are perennials that have basal leaves with long leaf-stems that can be upright or prostrate. Leaves are simple or compound with lobed, parted, or undivided leaf blades. The leaf margins are toothed or entire. Flowers with 4–27 sepals are produced singly, in cymes of 2–9 flowers, or in umbels, above a cluster of leaf- or sepal-like bracts. Sepals may be any color. The pistils have one ovule. The flowers have nectaries, but petals are missing in the majority of species. The fruits are ovoid to obovoid shaped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meloidogyne Javanica
''Meloidogyne javanica'' is a species of plant-pathogenic nematodes. It is one of the tropical root-knot nematodes and a major agricultural pest in many countries. It has many hosts. ''Meloidogyne javanica'' reproduces by obligatory mitotic parthenogenesis (apomixis). Hosts ''Meloidogyne javanica'' is a nematode pathogen that affects over 770 species of plants (Cabi 2018). The hosts of this pathogen include both weeds and crops of economic importance. Those of economic importance include tea, grapevine, vegetables, fruit trees, cereals, and ornamentals (Cabi 2018). ''Meloidogyne javanica'' is considered an agricultural pest, as it is extremely abundant and damaging (Alford 2012). Symptoms Because there are so many different hosts for this pathogen, the symptoms are very variable. Common symptoms include abnormal leaf color, abnormal leaf form, wilting leaves, galls, swollen roots, reduced root system, dwarfing and senescence (Cabi 2018). This pathogen does the most damage w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meloidogyne Hapla
Northern root-knot nematode (''Meloidogyne hapla'') is a species of vegetable pathogens which produces tiny galls on around 550 crop and weed species. They invade root tissue after birth. Females are able to lay up to 1,000 eggs at a time in a large egg mass. By surviving harsh winters, they can survive in cold climates (hence, the name, Northern). Hosts and symptoms ''Meloidogyne hapla'' (Northern root-knot nematode) has a wide host range. It is polyphagous and affects over 550 crops and weeds. It feeds on many agricultural and horticultural plants (vegetables, fruits, ornamentals), but few grasses or cereals. A list of known hosts can be found at the bottom of this page. Symptoms can be seen in the roots, leaves, and the overall growth of the infected plant. In roots, there may be stunting, wilting, and the formation of abnormal growths called galls. Galls are usually small and spherical and are situated near many small roots. They are formed when the nematode enters the roo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meloidogyne Arenaria
''Meloidogyne arenaria'' is a species of plant pathogenic nematodes. This nematode is also known as the ''peanut root knot nematode''. The word "''Meloidogyne''" is derived from two Greek words that mean "apple-shaped" and "female".Howard Ferris 1999 to 2011 http://plpnemweb.ucdavis.edu/nemaplex/taxadata/G076S1.htm. The peanut root knot nematode, ''M. arenaria'' is one of the "major" ''Meloidogyne'' species because of its worldwide economic importance.Chitwood, 1949 (Neal, 1889) Meloidogyne arenaria. http://nematode.unl.edu/wormaren.htm ''M. arenaria'' is a predominant nematode species in the United States attacking peanut in Alabama, Florida, Georgia, and Texas.J. L. Starr and E. R. Morgan, Management of the Peanut Root-knot Nematode, Meloidogyne arenaria, with Host Resistance. Department of Plant Pathology, Texas Agricultural Experiment Station, Texas A&M University, TAMU 2132, College Station http://www.plantmanagementnetwork.org/pub/php/management/rootknot/ The most damagin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scutellonema Brachyurum
''Scutellonema brachyurum'' (British spiral nematode, Carolina spiral nematode) is a plant pathogenic nematode Infecting African violets. References External links Tylenchida Plant pathogenic nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotylenchus Brachyurus
''Rotylenchus brachyurus'' is a plant pathogenic nematode infecting African violets. References External links Tylenchida Ornamental plant pathogens and diseases Plant pathogenic nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paratylenchus Projectus
''Paratylenchus projectus'' is a plant pathogenic nematode infecting several hosts including African violet, soybean and sunflower The common sunflower (''Helianthus annuus'') is a large annual forb of the genus ''Helianthus'' grown as a crop for its edible oily seeds. Apart from cooking oil production, it is also used as livestock forage (as a meal or a silage plant), as ... References External links Nemaplex, University of California - Paratylenchus projectus Tylenchida Soybean diseases Sunflower diseases Ornamental plant pathogens and diseases Agricultural pest nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Pratensis
''Pratylenchus pratensis'' is a plant pathogenic nematode. References External links Nemaplex, University of California - Pratylenchus pratensis pratensis Plant pathogenic nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicotylenchus
''Helicotylenchus'' is a genus of nematodes in the family Hoplolaimidae. They are known generally as spiral nematodes.O'Bannon, J. H. and R. N. Inserra''Helicotylenchus'' species as crop damaging parasitic nematodes.Nematology Circular 165. Florida Department of Agriculture and Consumer Services. 1989. They are found worldwide because they can live and survive in a wide range of habitats.Subbotin, S. A., et al. (2011)Diversity and phylogenetic relationships within the spiral nematodes of ''Helicotylenchus'' Steiner, 1945 (Tylenchida: Hoplolaimidae) as inferred from analysis of the D2-D3 expansion segments of 28S rRNA gene sequences.''Nematology'' 13(3), 333-45. They are among the most common parasitic nematodes of plants; found in corn, bananas, grass, soybeans. Description The female is wormlike and straight or spiral-shaped. The male is similar, but with a smaller anterior end. The body may take a spiral shape after death, if not in life. This ''habitus mortis'' gives the nemato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
