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Uncinula (Oidium) Cleistothecium 40X (2)
''Uncinula'' is a genus of fungi. Its species are plant pathogens that cause powdery mildew diseases on various plant hosts. The genus is characterized by its dark chasmothecia which bear filamentous, hyaline appendages with hooked tips. Over one hundred species have been described from mostly dicotyledenous hosts. Braun and Takamatsu (2000) suggested that ''Uncinula'' should be considered a later synonym of ''Erysiphe''; not all subsequent researchers have accepted their conclusions. One notorious species, ''Uncinula necator'' (syn. ''Erysiphe necator''), attacks various species of grapes (Vitis spp.) and can cause yield losses in European wine grapes. Other ''Uncinula'' species attack a wide variety of dicotyledon The dicotyledons, also known as dicots (or, more rarely, dicotyls), are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, t ...ous plants. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncinula Tulasnei
''Sawadaea tulasnei'' is a form of powdery mildew is a species of fungus in the family Erysiphaceae. This fungus attacks the leaves of the ''Acer platanoides'' (Norway maple) in North America, and in Great Britain and/or Ireland, ''Acer palmatum ''Acer palmatum'', commonly known as Japanese maple, palmate maple, or smooth Japanese maple (Japanese: ''irohamomiji'', , or ''momiji'', (栴), is a species of woody plant native to Japan, Korea, China, eastern Mongolia, and southeast Russi ...'' (also known as the Japanese Maple or Smooth Japanese Maple). Synonyms * ''Erysiphe varium'' Fr. 1822 * ''Uncinula aceris var. tulasnei'' (Fuckel) E. S. Salmon 1900 * ''Uncinula bicornis var. tulasnei'' (Fuckel) W. B. Cooke 1952 * ''Uncinula tulasnei'' Fuckel 1866 References Erysiphales Fungal tree pathogens and diseases Fungi described in 1937 {{fungus-tree-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Pathology
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 fungus, fungi, oomycetes, bacterium, bacteria, plant virus, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants. Not included are ectoparasites like insects, mites, vertebrate, or other Plant defense against herbivory, pests that affect plant health by eating Plant tissue, plant tissues. Plant pathology also involves the study of pathogen identification, disease etiology, disease cycles, economic impact, plant disease epidemiology, plant disease resistance, how plant diseases affect humans and animals, pathosystem genetics, and management of plant diseases. Overview Control of plant diseases is crucial to the reliable production of food, and it provides significant problems in agricultural use of land, wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncinula (Oidium) Cleistothecium 40X (2)
''Uncinula'' is a genus of fungi. Its species are plant pathogens that cause powdery mildew diseases on various plant hosts. The genus is characterized by its dark chasmothecia which bear filamentous, hyaline appendages with hooked tips. Over one hundred species have been described from mostly dicotyledenous hosts. Braun and Takamatsu (2000) suggested that ''Uncinula'' should be considered a later synonym of ''Erysiphe''; not all subsequent researchers have accepted their conclusions. One notorious species, ''Uncinula necator'' (syn. ''Erysiphe necator''), attacks various species of grapes (Vitis spp.) and can cause yield losses in European wine grapes. Other ''Uncinula'' species attack a wide variety of dicotyledon The dicotyledons, also known as dicots (or, more rarely, dicotyls), are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, t ...ous plants. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicotyledon
The dicotyledons, also known as dicots (or, more rarely, dicotyls), are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, that the seed has two embryonic leaves or cotyledons. There are around 200,000 species within this group. The other group of flowering plants were called monocotyledons (or monocots), typically each having one cotyledon. Historically, these two groups formed the two divisions of the flowering plants. Largely from the 1990s onwards, molecular phylogenetic research confirmed what had already been suspected: that dicotyledons are not a group made up of all the descendants of a common ancestor (i.e., they are not a monophyletic group). Rather, a number of lineages, such as the magnoliids and groups now collectively known as the basal angiosperms, diverged earlier than the monocots did; in other words, monocots evolved from within the dicot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitis Vinifera
''Vitis vinifera'', the common grape vine, is a species of flowering plant, native to the Mediterranean region, Central Europe, and southwestern Asia, from Morocco and Portugal north to southern Germany and east to northern Iran. There are currently between 5,000 and 10,000 varieties of ''Vitis vinifera'' grapes though only a few are of commercial significance for wine and table grape production. The wild grape is often classified as ''Vitis vinifera'' ''sylvestris'' (in some classifications considered ''Vitis sylvestris''), with ''Vitis vinifera'' ''vinifera'' restricted to cultivated forms. Domesticated vines have hermaphrodite flowers, but ''sylvestris'' is dioecious (male and female flowers on separate plants) and pollination is required for fruit to develop. Grapes can be eaten fresh or dried to produce raisins, sultanas, and currants. Grape leaves are used in the cuisine of many cultures. The fresh grapes can also be processed into juice that is fermented to make wine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitis
''Vitis'' (grapevine) is a genus of 79 accepted species of vining plants in the flowering plant family Vitaceae. The genus is made up of species predominantly from the Northern Hemisphere. It is economically important as the source of grapes, both for direct consumption of the fruit and for fermentation to produce wine. The study and cultivation of grapevines is called viticulture. Most cultivated ''Vitis'' varieties are wind-pollinated with hermaphroditic flowers containing both male and female reproductive structures, while wild species are dieceous. These flowers are grouped in bunches called inflorescences. In many species, such as ''Vitis vinifera'', each successfully pollinated flower becomes a grape berry with the inflorescence turning into a cluster of grapes. While the flowers of the grapevines are usually very small, the berries are often large and brightly colored with sweet flavors that attract birds and other animals to disperse the seeds contained within the berrie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erysiphe
''Erysiphe'' is a genus of fungi in the family Erysiphaceae. Many of the species in this genus are plant pathogens which cause powdery mildew. Species This genus includes, but is not limited to the following species: * ''Erysiphe alphitoides'' * '' Erysiphe azerbaijanica'' * ''Erysiphe betae'' * '' Erysiphe brunneopunctata'' * ''Erysiphe cichoracearum'' * '' Erysiphe communis'' * ''Erysiphe cruciferarum'' * ''Erysiphe fernandoae'' * '' Erysiphe flexuosa'' * ''Erysiphe heraclei'' * ''Erysiphe lespedezae'' 1. Xiao, Y.-T., C.-J. Wang, T.-C. Huang, and Y.-M. Shen. 2020. Erysiphe lespedezae causing powdery mildew on Bauhinia variegata, B. blakeana and Desmodium caudatum in Taiwan. Forest Pathology 50(5):e12631. * ''Erysiphe michikoae'' * ''Erysiphe nitida * ''Erysiphe pisi'' * ''Erysiphe polygoni'' * ''Erysiphe robiniae'' * ''Erysiphe syringae'' Former species * ''Blumeria graminis'' * ''Uncinula necator ''Uncinula necator'' (syn. ''Erysiphe necator'') is a fungus that causes pow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dicotyledon
The dicotyledons, also known as dicots (or, more rarely, dicotyls), are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, that the seed has two embryonic leaves or cotyledons. There are around 200,000 species within this group. The other group of flowering plants were called monocotyledons (or monocots), typically each having one cotyledon. Historically, these two groups formed the two divisions of the flowering plants. Largely from the 1990s onwards, molecular phylogenetic research confirmed what had already been suspected: that dicotyledons are not a group made up of all the descendants of a common ancestor (i.e., they are not a monophyletic group). Rather, a number of lineages, such as the magnoliids and groups now collectively known as the basal angiosperms, diverged earlier than the monocots did; in other words, monocots evolved from within the dicot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powdery Mildew
Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of ascomycete fungi in the order Erysiphales. Powdery mildew is one of the easier plant diseases to identify, as its symptoms are quite distinctive. Infected plants display white powdery spots on the leaves and stems. The lower leaves are the most affected, but the mildew can appear on any above-ground part of the plant. As the disease progresses, the spots get larger and denser as large numbers of asexual spores are formed, and the mildew may spread up and down the length of the plant. Powdery mildew grows well in environments with high humidity and moderate temperatures. Greenhouses provide an ideal moist, temperate environment for the spread of the disease. This causes harm to agricultural and horticultural practices where powdery mildew may thrive in a greenhouse setting. In an agricultural or horticultural setting, the pathogen can be controlle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uncinula Necator
''Uncinula necator'' (syn. ''Erysiphe necator'') is a fungus that causes powdery mildew of grape. It is a common pathogen of Vitis species, including the wine grape, ''Vitis vinifera''. The fungus is believed to have originated in North America. European varieties of ''Vitis vinifera'' are more or less susceptible to this fungus. ''Uncinula necator'' infects all green tissue on the grapevine, including leaves and young berries. It can cause crop loss and poor wine quality if untreated. The sexual stage of this pathogen requires free moisture to release ascospores from its cleistothecia in the spring. However, free moisture is not needed for secondary spread via conidia; high atmospheric humidity is sufficient. Its anamorph is called ''Oidium tuckeri''. It produces common odors such as 1-octen-3-one and (Z)- 1,5-octadien-3-one. This mildew can be treated with sulfur or fungicides; however resistance to several chemical classes such as Benomyl, the DMIs, and Strobilurins has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acer Platanoides
''Acer platanoides'', commonly known as the Norway maple, is a species of maple native to eastern and central Europe and western Asia, from Spain east to Russia, north to southern Scandinavia and southeast to northern Iran. It was introduced to North America in the mid-1700s as a shade tree. It is a member of the family Sapindaceae. Description ''Acer platanoides'' is a deciduous tree, growing to tall with a trunk up to in diameter, and a broad, rounded crown. The bark is grey-brown and shallowly grooved. Unlike many other maples, mature trees do not tend to develop a shaggy bark. The shoots are green at first, soon becoming pale brown. The winter buds are shiny red-brown. The leaves are opposite, palmately lobed with five lobes, long and across; the lobes each bear one to three side teeth, and an otherwise smooth margin. The leaf petiole is long, and secretes a milky juice when broken. The autumn colour is usually yellow, occasionally orange-red. The flowers are in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
